二进制安装Kubernetes（k8s）v1.36.0
介绍
github.com/cby-chen/Ku… 开源不易，帮忙点个star，谢谢了
kubernetes（k8s）二进制高可用安装部署，支持IPv4+IPv6双栈。
强烈建议在Github上查看文档 ！！！
Github出问题会更新文档，并且后续尽可能第一时间更新新版本文档 ！！！
手动项目地址：github.com/cby-chen/Ku…
1.环境
| 主机名称 | IP地址 | 说明 | 软件 |
|---|---|---|---|
| 192.168.1.60 | 外网节点 | 下载各种所需安装包 | |
| Master01 | 192.168.1.31 | master节点 | kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived、nginx |
| Master02 | 192.168.1.32 | master节点 | kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived、nginx |
| Master03 | 192.168.1.33 | master节点 | kube-apiserver、kube-controller-manager、kube-scheduler、etcd、 kubelet、kube-proxy、nfs-client、haproxy、keepalived、nginx |
| Node01 | 192.168.1.34 | node节点 | kubelet、kube-proxy、nfs-client、nginx |
| Node02 | 192.168.1.35 | node节点 | kubelet、kube-proxy、nfs-client、nginx |
| 192.168.1.36 | VIP |
详细版本
| 软件 | 版本 |
|---|---|
| cni_plugins_version | v1.9.1 |
| cri_containerd_cni_version | 2.3.0 |
| crictl_version | v1.36.0 |
| cri_dockerd_version | 0.4.3 |
| etcd_version | v3.6.11 |
| cfssl_version | 1.6.5 |
| kubernetes_server_version | 1.36.0 |
| docker_version | 29.4.3 |
| runc_version | 1.5.0 |
| kernel_version | 6.16.4 |
| helm_version | 4.1.4 |
| nginx_version | 1.30.0 |
网段
IPv4
物理主机：192.168.1.0/24
service：10.96.0.0/16
pod：172.16.0.0/16
IPv6
物理主机：fc00::/8
service：fd00:1111::/112
pod：fd00:2222::/112
安装包已经整理好：github.com/cby-chen/Ku…
1.1.k8s基础系统环境配置
1.2.配置IP
详见完整版 https://github.com/cby-chen/Kubernetes
1.3.设置主机名
hostnamectl set-hostname k8s-master01
hostnamectl set-hostname k8s-master02
hostnamectl set-hostname k8s-master03
hostnamectl set-hostname k8s-node01
hostnamectl set-hostname k8s-node02
# 参数解释
#
# 参数: set-hostname
# 解释: 这是hostnamectl命令的一个参数，用于设置系统的主机名。
#
# 参数: k8s-master01
# 解释: 这是要设置的主机名，将系统的主机名设置为"k8s-master01"。
1.4.配置yum源
详见完整版 https://github.com/cby-chen/Kubernetes
1.5.安装一些必备工具
# 对于 Ubuntu
apt update && apt upgrade -y && apt install -y wget psmisc vim net-tools nfs-kernel-server telnet lvm2 git tar curl
# 对于 CentOS 7 & CentOS 8 & CentOS 9 & CentOS 10
yum update -y && yum -y install wget psmisc vim net-tools nfs-utils telnet yum-utils device-mapper-persistent-data lvm2 git tar curl
1.5.1 下载离线所需文件(可选)
在互联网服务器上安装一个一模一样的系统进行下载所需包
CentOS7
详见完整版 https://github.com/cby-chen/Kubernetes
CentOS8
详见完整版 https://github.com/cby-chen/Kubernetes
CentOS9 & CentOS10
详见完整版 https://github.com/cby-chen/Kubernetes
Ubuntu 下载包和依赖
详见完整版 https://github.com/cby-chen/Kubernetes
1.6.选择性下载需要工具
#!/bin/bash
# 查看版本地址：
#
# https://github.com/containernetworking/plugins/releases/
# https://github.com/containerd/containerd/releases/
# https://github.com/kubernetes-sigs/cri-tools/releases/
# https://github.com/Mirantis/cri-dockerd/releases/
# https://github.com/etcd-io/etcd/releases/
# https://github.com/cloudflare/cfssl/releases/
# https://github.com/kubernetes/kubernetes/tree/master/CHANGELOG
# https://download.docker.com/linux/static/stable/x86_64/
# https://github.com/opencontainers/runc/releases/
# https://github.com/helm/helm/tags
# http://nginx.org/download/
# Version numbers
cni_plugins_version='v1.9.1'
cri_containerd_cni_version='2.3.0'
crictl_version='v1.36.0'
cri_dockerd_version='0.4.3'
etcd_version='v3.6.11'
cfssl_version='1.6.5'
kubernetes_server_version='1.36.0'
docker_version='29.4.3'
runc_version='1.5.0'
kernel_version='5.4.278'
helm_version='4.1.4'
nginx_version='1.30.0'
# URLs
base_url='https://github.com'
kernel_url="http://mirrors.tuna.tsinghua.edu.cn/elrepo/kernel/el7/x86_64/RPMS/kernel-lt-${kernel_version}-1.el7.elrepo.x86_64.rpm"
runc_url="${base_url}/opencontainers/runc/releases/download/v${runc_version}/runc.amd64"
docker_url="https://mirrors.ustc.edu.cn/docker-ce/linux/static/stable/x86_64/docker-${docker_version}.tgz"
cni_plugins_url="${base_url}/containernetworking/plugins/releases/download/${cni_plugins_version}/cni-plugins-linux-amd64-${cni_plugins_version}.tgz"
cri_containerd_cni_url="${base_url}/containerd/containerd/releases/download/v${cri_containerd_cni_version}/containerd-${cri_containerd_cni_version}-linux-amd64.tar.gz"
crictl_url="${base_url}/kubernetes-sigs/cri-tools/releases/download/${crictl_version}/crictl-${crictl_version}-linux-amd64.tar.gz"
cri_dockerd_url="${base_url}/Mirantis/cri-dockerd/releases/download/v${cri_dockerd_version}/cri-dockerd-${cri_dockerd_version}.amd64.tgz"
etcd_url="${base_url}/etcd-io/etcd/releases/download/${etcd_version}/etcd-${etcd_version}-linux-amd64.tar.gz"
cfssl_url="${base_url}/cloudflare/cfssl/releases/download/v${cfssl_version}/cfssl_${cfssl_version}_linux_amd64"
cfssljson_url="${base_url}/cloudflare/cfssl/releases/download/v${cfssl_version}/cfssljson_${cfssl_version}_linux_amd64"
helm_url="https://mirrors.huaweicloud.com/helm/v${helm_version}/helm-v${helm_version}-linux-amd64.tar.gz"
kubernetes_server_url="https://dl.k8s.io/v${kubernetes_server_version}/kubernetes-server-linux-amd64.tar.gz"
nginx_url="http://nginx.org/download/nginx-${nginx_version}.tar.gz"
# Download packages
packages=(
# $kernel_url
$runc_url
$docker_url
$cni_plugins_url
$cri_containerd_cni_url
$crictl_url
$cri_dockerd_url
$etcd_url
$cfssl_url
$cfssljson_url
$helm_url
$kubernetes_server_url
$nginx_url
)
for package_url in "${packages[@]}"; do
filename=$(basename "$package_url")
if curl --parallel --parallel-immediate -k -L -C - -o "$filename" "$package_url"; then
echo "Downloaded $filename"
else
echo "Failed to download $filename"
exit 1
fi
done
1.7.关闭防火墙
# Ubuntu忽略，CentOS执行
systemctl disable --now firewalld
1.8.关闭SELinux
# Ubuntu忽略，CentOS执行
setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
1.9.关闭交换分区
sed -ri 's/.*swap.*/#&/' /etc/fstab
swapoff -a && sysctl -w vm.swappiness=0
cat /etc/fstab
# /dev/mapper/centos-swap swap swap defaults 0 0
1.10.网络配置（俩种方式二选一）
# Ubuntu忽略，CentOS执行，CentOS9不支持方式一
# 方式一
# systemctl disable --now NetworkManager
# systemctl start network && systemctl enable network
# 方式二
cat > /etc/NetworkManager/conf.d/calico.conf << EOF
[keyfile]
unmanaged-devices=interface-name:cali*;interface-name:tunl*;interface-name:vxlan*;interface-name:kube*
EOF
systemctl restart NetworkManager
1.11.进行时间同步
# 服务端
# apt install chrony -y
yum install chrony -y
cat > /etc/chrony.conf << EOF
pool ntp.aliyun.com iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
allow 192.168.1.0/24
local stratum 10
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
EOF
systemctl restart chronyd ; systemctl enable chronyd
# 客户端
# apt install chrony -y
yum install chrony -y
cat > /etc/chrony.conf << EOF
pool 192.168.1.31 iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
rtcsync
keyfile /etc/chrony.keys
leapsectz right/UTC
logdir /var/log/chrony
EOF
systemctl restart chronyd ; systemctl enable chronyd
#使用客户端进行验证
chronyc sources -v
1.12.配置ulimit
ulimit -SHn 65535
cat >> /etc/security/limits.conf <<EOF
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* seft memlock unlimited
* hard memlock unlimitedd
EOF
1.13.配置免密登录
# apt install -y sshpass
yum install -y sshpass
ssh-keygen -f /root/.ssh/id_rsa -P ''
export IP="192.168.1.31 192.168.1.32 192.168.1.33 192.168.1.34 192.168.1.35"
export SSHPASS=123123
for HOST in $IP;do
sshpass -e ssh-copy-id -o StrictHostKeyChecking=no $HOST
done
1.14.添加启用源
# Ubuntu忽略，CentOS执行
# 为 RHEL-10或 CentOS-10配置源
dnf install https://www.elrepo.org/elrepo-release-10.el10.elrepo.noarch.rpm -y
sed -i "s@mirrorlist@#mirrorlist@g" /etc/yum.repos.d/elrepo.repo
sed -i "s@elrepo.org/linux@mirrors.tuna.tsinghua.edu.cn/elrepo@g" /etc/yum.repos.d/elrepo.repo
# 为 RHEL-9或 CentOS-9配置源
dnf install https://www.elrepo.org/elrepo-release-9.el9.elrepo.noarch.rpm -y
sed -i "s@mirrorlist@#mirrorlist@g" /etc/yum.repos.d/elrepo.repo
sed -i "s@elrepo.org/linux@mirrors.tuna.tsinghua.edu.cn/elrepo@g" /etc/yum.repos.d/elrepo.repo
# 为 RHEL-8或 CentOS-8配置源
dnf install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm -y
sed -i "s@mirrorlist@#mirrorlist@g" /etc/yum.repos.d/elrepo.repo
sed -i "s@elrepo.org/linux@mirrors.tuna.tsinghua.edu.cn/elrepo@g" /etc/yum.repos.d/elrepo.repo
# 为 RHEL-7 SL-7 或 CentOS-7 安装 ELRepo
yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm -y
sed -i "s@mirrorlist@#mirrorlist@g" /etc/yum.repos.d/elrepo.repo
sed -i "s@elrepo.org/linux@mirrors.tuna.tsinghua.edu.cn/elrepo@g" /etc/yum.repos.d/elrepo.repo
# 查看可用安装包
yum --disablerepo="*" --enablerepo="elrepo-kernel" list available
1.15.升级内核至4.18版本以上（若内核版本不够执行升级）
# Ubuntu忽略，CentOS执行
# 安装最新的内核
# 我这里选择的是稳定版kernel-ml 如需更新长期维护版本kernel-lt
yum -y --enablerepo=elrepo-kernel install kernel-ml
# 查看已安装那些内核
rpm -qa | grep kernel
# 查看默认内核
grubby --default-kernel
# 若不是最新的使用命令设置
grubby --set-default $(ls /boot/vmlinuz-* | grep elrepo)
# 重启生效
reboot
# v8 整合命令为：
yum install https://www.elrepo.org/elrepo-release-9.el9.elrepo.noarch.rpm -y ; sed -i "s@mirrorlist@#mirrorlist@g" /etc/yum.repos.d/elrepo.repo ; sed -i "s@elrepo.org/linux@mirrors.tuna.tsinghua.edu.cn/elrepo@g" /etc/yum.repos.d/elrepo.repo ; yum --disablerepo="*" --enablerepo="elrepo-kernel" list available -y ; yum --enablerepo=elrepo-kernel install kernel-lt -y ; grubby --default-kernel ; reboot
# v8 整合命令为：
yum install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm -y ; sed -i "s@mirrorlist@#mirrorlist@g" /etc/yum.repos.d/elrepo.repo ; sed -i "s@elrepo.org/linux@mirrors.tuna.tsinghua.edu.cn/elrepo@g" /etc/yum.repos.d/elrepo.repo ; yum --disablerepo="*" --enablerepo="elrepo-kernel" list available -y ; yum --enablerepo=elrepo-kernel install kernel-lt -y ; grubby --default-kernel ; reboot
# v7 整合命令为：
yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm -y ; sed -i "s@mirrorlist@#mirrorlist@g" /etc/yum.repos.d/elrepo.repo ; sed -i "s@elrepo.org/linux@mirrors.tuna.tsinghua.edu.cn/elrepo@g" /etc/yum.repos.d/elrepo.repo ; yum --disablerepo="*" --enablerepo="elrepo-kernel" list available -y ; yum --enablerepo=elrepo-kernel install kernel-lt -y ; grubby --set-default $(ls /boot/vmlinuz-* | grep elrepo) ; grubby --default-kernel ; reboot
# 离线版本
yum install -y /root/cby/kernel-lt-*-1.el7.elrepo.x86_64.rpm ; grubby --set-default $(ls /boot/vmlinuz-* | grep elrepo) ; grubby --default-kernel ; reboot
1.16.安装ipvsadm
# 对于CentOS7离线安装
# yum install /root/centos7/ipset-*.el7.x86_64.rpm /root/centos7/lm_sensors-libs-*.el7.x86_64.rpm /root/centos7/ipset-libs-*.el7.x86_64.rpm /root/centos7/sysstat-*.el7_9.x86_64.rpm /root/centos7/ipvsadm-*.el7.x86_64.rpm -y
# 对于 Ubuntu
# apt install ipvsadm ipset sysstat conntrack -y
# 对于 CentOS
yum install ipvsadm ipset sysstat conntrack libseccomp -y
cat >> /etc/modules-load.d/ipvs.conf <<EOF
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOF
systemctl restart systemd-modules-load.service
lsmod | grep -e ip_vs -e nf_conntrack
ip_vs_sh 16384 0
ip_vs_wrr 16384 0
ip_vs_rr 16384 0
ip_vs 237568 6 ip_vs_rr,ip_vs_sh,ip_vs_wrr
nf_conntrack 217088 3 nf_nat,nft_ct,ip_vs
nf_defrag_ipv6 24576 2 nf_conntrack,ip_vs
nf_defrag_ipv4 16384 1 nf_conntrack
libcrc32c 16384 5 nf_conntrack,nf_nat,nf_tables,xfs,ip_vs
1.17.修改内核参数
cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.netfilter.nf_conntrack_max=2310720
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0
net.ipv6.conf.all.forwarding = 1
EOF
sysctl --system
1.18.所有节点配置hosts本地解析
cat > /etc/hosts <<EOF
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.31 k8s-master01
192.168.1.32 k8s-master02
192.168.1.33 k8s-master03
192.168.1.34 k8s-node01
192.168.1.35 k8s-node02
192.168.1.36 lb-vip
fc00::31 k8s-master01
fc00::32 k8s-master02
fc00::33 k8s-master03
fc00::34 k8s-node01
fc00::35 k8s-node02
EOF
2.k8s基本组件安装
注意 ： 2.1 和 2.2 二选其一即可
说明：使用docker作为Runtime会出现报错，无法进入容器内部，该问题的是cri-dockerd不兼容导致的，同时官方已经弃用docker，建议使用Containerd作为Runtime，例如：
# docker作为Runtime
[root@k8s-master01 ~]# kubectl exec -ti busybox -- sh
Defaulted container "busybox" out of: busybox, debugger-8sq56 (ephem)
error: Internal error occurred: error sending request: Post "//[::]:39823/cri/exec/JBk5X7Cx": http: server gave HTTP response to HTTPS client
[root@k8s-master01 ~]#
# Containerd作为Runtime
[root@k8s-master01 ~]# kubectl exec -ti busybox -- sh
Defaulted container "busybox" out of: busybox, debugger-8sq56 (ephem)
/ #
/ #
[root@k8s-master01 ~]#
2.1.安装Containerd作为Runtime
# https://github.com/containernetworking/plugins/releases/
# wget https://github.com/containernetworking/plugins/releases/download/v1.7.1/cni-plugins-linux-amd64-v1.7.1.tgz
cd cby/
#创建cni插件所需目录
mkdir -p /etc/cni/net.d /opt/cni/bin
#解压cni二进制包
tar xf cni-plugins-linux-amd64-v*.tgz -C /opt/cni/bin/
# https://github.com/containerd/containerd/releases/
# wget https://github.com/containerd/containerd/releases/download/v2.0.5/containerd-2.0.5-linux-amd64.tar.gz
#解压
tar -xzf containerd-*-linux-amd64.tar.gz -C /usr/local/
#创建服务启动文件
cat > /etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target
[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
TasksMax=infinity
OOMScoreAdjust=-999
[Install]
WantedBy=multi-user.target
EOF
2.1.1配置Containerd所需的模块
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF
2.1.2加载模块
systemctl restart systemd-modules-load.service
2.1.3配置Containerd所需的内核
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
# 加载内核
sysctl --system
2.1.4创建Containerd的配置文件
# 创建默认配置文件
mkdir -p /etc/containerd
containerd config default | tee /etc/containerd/config.toml
# 修改Containerd的配置文件
# sed -i "s#SystemdCgroup\ \=\ false#SystemdCgroup\ \=\ true#g" /etc/containerd/config.toml
# cat /etc/containerd/config.toml | grep SystemdCgroup
# 沙箱pause镜像
sed -i "s#registry.k8s.io#registry.aliyuncs.com/chenby#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep sandbox
# 配置加速器
[root@k8s-master01 ~]# vim /etc/containerd/config.toml
[root@k8s-master01 ~]# cat /etc/containerd/config.toml | grep certs.d -C 5
[plugins.'io.containerd.cri.v1.images'.pinned_images]
sandbox = 'registry.aliyuncs.com/chenby/pause:3.10'
[plugins.'io.containerd.cri.v1.images'.registry]
config_path = '/etc/containerd/certs.d'
[plugins.'io.containerd.cri.v1.images'.image_decryption]
key_model = 'node'
[plugins.'io.containerd.cri.v1.runtime']
[root@k8s-master01 ~]#
mkdir /etc/containerd/certs.d/docker.io -pv
cat > /etc/containerd/certs.d/docker.io/hosts.toml << EOF
server = "https://docker.io"
[host."https://jockerhub.com"]
capabilities = ["pull", "resolve"]
EOF
# 配置 GFW 代理
mkdir -p /etc/systemd/system/containerd.service.d
touch /etc/systemd/system/containerd.service.d/http-proxy.conf
tee /etc/systemd/system/containerd.service.d/http-proxy.conf << EOF
[Service]
Environment="HTTP_PROXY=http://192.168.1.100:7890"
Environment="HTTPS_PROXY=http://192.168.1.100:7890"
Environment="NO_PROXY=localhost,127.0.0.1,containerd"
EOF
2.1.5启动并设置为开机启动
systemctl daemon-reload
systemctl enable --now containerd.service
systemctl stop containerd.service
systemctl start containerd.service
systemctl restart containerd.service
systemctl status containerd.service
2.1.6配置crictl客户端连接的运行时位置
# https://github.com/kubernetes-sigs/cri-tools/releases/
# wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.36.0/crictl-v1.36.0-linux-amd64.tar.gz
#解压
tar xf crictl-v*-linux-amd64.tar.gz -C /usr/bin/
#生成配置文件
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF
#测试
systemctl restart containerd
crictl info
2.2 安装docker作为Runtime
2.2.1 解压docker程序
# 二进制包下载地址：https://download.docker.com/linux/static/stable/x86_64/
# wget https://mirrors.ustc.edu.cn/docker-ce/linux/static/stable/x86_64/docker-27.4.0.tgz
#解压
tar xf docker-*.tgz
#拷贝二进制文件
cp docker/* /usr/bin/
2.2.2 创建containerd的service文件
#创建containerd的service文件,并且启动
cat >/etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target
[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=1048576
TasksMax=infinity
OOMScoreAdjust=-999
[Install]
WantedBy=multi-user.target
EOF
# 设置开机自启
systemctl enable --now containerd.service
2.2.3 准备docker的service文件
#准备docker的service文件
cat > /etc/systemd/system/docker.service <<EOF
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
Requires=containerd.service
[Service]
Type=notify
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
KillMode=process
OOMScoreAdjust=-500
[Install]
WantedBy=multi-user.target
EOF
2.2.4 准备docker的socket文件
#准备docker的socket文件
cat > /etc/systemd/system/docker.socket <<EOF
[Unit]
Description=Docker Socket for the API
[Socket]
ListenStream=/var/run/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker
[Install]
WantedBy=sockets.target
EOF
2.2.5 配置加速器
# 配置加速器
mkdir /etc/docker/ -pv
cat >/etc/docker/daemon.json <<EOF
{
"exec-opts": ["native.cgroupdriver=systemd"],
"registry-mirrors": [
"https://jockerhub.com"
],
"max-concurrent-downloads": 10,
"log-driver": "json-file",
"log-level": "warn",
"log-opts": {
"max-size": "10m",
"max-file": "3"
},
"data-root": "/var/lib/docker",
"proxies": {
"http-proxy": "http://192.168.1.100:7890",
"https-proxy": "http://192.168.1.100:7890",
"no-proxy": "localhost"
}
}
EOF
2.2.6 启动docker
groupadd docker
systemctl daemon-reload
systemctl enable --now docker.service
systemctl enable --now docker.socket
systemctl stop docker.service
systemctl start docker.service
systemctl restart docker.service
systemctl status docker.service
docker info
2.2.7 解压cri-docker
# 由于1.24以及更高版本不支持docker所以安装cri-docker
# 下载cri-docker
# https://github.com/Mirantis/cri-dockerd/releases/
# wget https://github.com/Mirantis/cri-dockerd/releases/download/v0.3.16/cri-dockerd-0.3.16.amd64.tgz
# 解压cri-docker
tar xvf cri-dockerd-*.amd64.tgz
cp -r cri-dockerd/ /usr/bin/
chmod +x /usr/bin/cri-dockerd/cri-dockerd
2.2.8 写入启动cri-docker配置文件
# 写入启动配置文件
cat > /usr/lib/systemd/system/cri-docker.service <<EOF
[Unit]
Description=CRI Interface for Docker Application Container Engine
Documentation=https://docs.mirantis.com
After=network-online.target firewalld.service docker.service
Wants=network-online.target
Requires=cri-docker.socket
[Service]
Type=notify
ExecStart=/usr/bin/cri-dockerd/cri-dockerd --ipv6-dual-stack --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.10
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
# 关键配置：允许 Socket 激活
StartLimitBurst=3
# 资源限制
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
KillMode=process
[Install]
WantedBy=multi-user.target
EOF
2.2.9 写入cri-docker的socket配置文件
# 写入socket配置文件
cat > /usr/lib/systemd/system/cri-docker.socket <<EOF
[Unit]
Description=CRI Docker Socket for the API
PartOf=cri-docker.service
[Socket]
ListenStream=/var/run/cri-dockerd.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker
[Install]
WantedBy=sockets.target
EOF
2.2.10 启动cri-docker
systemctl daemon-reload
systemctl enable --now cri-docker.socket
systemctl restart cri-docker.socket
systemctl restart cri-docker.service
systemctl status cri-docker.socket
systemctl status cri-docker.service
systemctl stop cri-docker.socket
systemctl stop cri-docker.service
2.3.k8s与etcd下载及安装（仅在master01操作）
2.3.1解压k8s安装包
# 下载安装包
# https://github.com/etcd-io/etcd/releases/
# https://github.com/kubernetes/kubernetes/tree/master/CHANGELOG
#
# wget https://github.com/etcd-io/etcd/releases/download/v3.5.21/etcd-v3.5.21-linux-amd64.tar.gz
# wget https://cdn.dl.k8s.io/release/v1.36.0/kubernetes-server-linux-amd64.tar.gz
# 解压k8s安装文件
cd cby
tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}
# 解压etcd安装文件
tar -xf etcd*.tar.gz && mv etcd-*/etcd /usr/local/bin/ && mv etcd-*/etcdctl /usr/local/bin/
# 查看/usr/local/bin下内容
[root@localhost cby]# ll /usr/local/bin/
总计 510444
-rwxr-xr-x. 1 root root 48051624 4月15日 01:36 containerd
-rwxr-xr-x. 1 root root 8339640 4月15日 01:36 containerd-shim-runc-v2
-rwxr-xr-x. 1 root root 21758305 4月15日 01:36 containerd-stress
-rwxr-xr-x. 1 root root 24961377 4月15日 01:36 ctr
-rwxr-xr-x. 1 1000 1000 26607800 4月 2日 02:30 etcd
-rwxr-xr-x. 1 1000 1000 17469624 4月 2日 02:30 etcdctl
-rwxr-xr-x. 1 root root 88309922 4月22日 21:59 kube-apiserver
-rwxr-xr-x. 1 root root 74285218 4月22日 21:59 kube-controller-manager
-rwxr-xr-x. 1 root root 59502754 4月22日 21:59 kubectl
-rwxr-xr-x. 1 root root 60064009 4月22日 21:59 kubelet
-rwxr-xr-x. 1 root root 44200098 4月22日 21:59 kube-proxy
-rwxr-xr-x. 1 root root 49098914 4月22日 21:59 kube-scheduler
[root@localhost cby]#
2.3.2查看版本
[root@k8s-master01 ~]# kubelet --version
Kubernetes v1.36.0
[root@k8s-master01 ~]# etcdctl version
etcdctl version: 3.6.11
API version: 3.6
[root@k8s-master01 ~]#
2.3.3将组件发送至其他k8s节点
Master='k8s-master02 k8s-master03'
Work='k8s-node01 k8s-node02'
# 拷贝master组件
for NODE in $Master; do echo $NODE; scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} $NODE:/usr/local/bin/; scp /usr/local/bin/etcd* $NODE:/usr/local/bin/; done
# 拷贝work组件
for NODE in $Work; do echo $NODE; scp /usr/local/bin/kube{let,-proxy} $NODE:/usr/local/bin/ ; done
# 所有节点执行
mkdir -p /opt/cni/bin
2.3创建证书相关文件
# 请查看Github仓库 或者进行获取已经打好的包
# 可以根据下文3.x进行手动部署操作
https://github.com/cby-chen/Kubernetes/
https://github.com/cby-chen/Kubernetes/tags
https://github.com/cby-chen/Kubernetes/releases/download/v1.36.0/kubernetes-v1.36.0.tar
3.相关证书生成
# master01节点下载证书生成工具
# wget "https://github.com/cloudflare/cfssl/releases/download/v1.6.5/cfssl_1.6.5_linux_amd64" -O /usr/local/bin/cfssl
# wget "https://github.com/cloudflare/cfssl/releases/download/v1.6.5/cfssljson_1.6.5_linux_amd64" -O /usr/local/bin/cfssljson
# 软件包内有
cp cfssl_*_linux_amd64 /usr/local/bin/cfssl
cp cfssljson_*_linux_amd64 /usr/local/bin/cfssljson
# 添加执行权限
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson
3.1.生成etcd证书
特别说明除外，以下操作在所有master节点操作
3.1.1所有master节点创建证书存放目录
mkdir /etc/etcd/ssl -p
3.1.2master01节点生成etcd证书
# 写入生成证书所需的配置文件
cat > ca-config.json << EOF
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "876000h"
}
}
}
}
EOF
cat > etcd-ca-csr.json << EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
# 生成etcd证书和etcd证书的key（如果你觉得以后可能会扩容，可以在ip那多写几个预留出来）
# 若没有IPv6 可删除可保留
cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca
cat > etcd-csr.json << EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
]
}
EOF
cfssl gencert \
-ca=/etc/etcd/ssl/etcd-ca.pem \
-ca-key=/etc/etcd/ssl/etcd-ca-key.pem \
-config=ca-config.json \
-hostname=127.0.0.1,k8s-master01,k8s-master02,k8s-master03,192.168.1.31,192.168.1.32,192.168.1.33,::1 \
-profile=kubernetes \
etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd
3.1.3将证书复制到其他节点
Master='k8s-master02 k8s-master03'
for NODE in $Master; do ssh $NODE "mkdir -p /etc/etcd/ssl"; for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do scp /etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE}; done; done
3.2.生成k8s相关证书
特别说明除外，以下操作在所有master节点操作
3.2.1 所有k8s节点创建证书存放目录
mkdir -p /etc/kubernetes/pki
3.2.2 master01节点生成k8s证书
# 写入生成证书所需的配置文件
cat > ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
cfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca
cat > apiserver-csr.json << EOF
{
"CN": "kube-apiserver",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
]
}
EOF
# 生成一个根证书 ，多写了一些IP作为预留IP，为将来添加node做准备
# 10.96.0.1是service网段的第一个地址，需要计算，192.168.1.36为高可用vip地址
# 若没有IPv6 可删除可保留
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-hostname=10.96.0.1,192.168.1.36,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,x.oiox.cn,z.oiox.cn,192.168.1.31,192.168.1.32,192.168.1.33,192.168.1.34,192.168.1.35,192.168.1.36,192.168.1.37,192.168.1.38,192.168.1.39,192.168.1.40,::1 \
-profile=kubernetes apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver
3.2.3 生成apiserver聚合证书
cat > front-proxy-ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"ca": {
"expiry": "876000h"
}
}
EOF
cfssl gencert -initca front-proxy-ca-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-ca
cat > front-proxy-client-csr.json << EOF
{
"CN": "front-proxy-client",
"key": {
"algo": "rsa",
"size": 2048
}
}
EOF
cfssl gencert \
-ca=/etc/kubernetes/pki/front-proxy-ca.pem \
-ca-key=/etc/kubernetes/pki/front-proxy-ca-key.pem \
-config=ca-config.json \
-profile=kubernetes front-proxy-client-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-client
3.2.4 生成controller-manage的证书
在《5.高可用配置》选择使用那种高可用方案
若使用 haproxy、keepalived 那么为 --server=https://192.168.1.36:9443
若使用 nginx方案，那么为 --server=https://127.0.0.1:8443
cat > manager-csr.json << EOF
{
"CN": "system:kube-controller-manager",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-controller-manager",
"OU": "Kubernetes-manual"
}
]
}
EOF
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
manager-csr.json | cfssljson -bare /etc/kubernetes/pki/controller-manager
# 设置一个集群项
# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.1.36:9443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://127.0.0.1:8443 \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个环境项，一个上下文
kubectl config set-context system:kube-controller-manager@kubernetes \
--cluster=kubernetes \
--user=system:kube-controller-manager \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个用户项
kubectl config set-credentials system:kube-controller-manager \
--client-certificate=/etc/kubernetes/pki/controller-manager.pem \
--client-key=/etc/kubernetes/pki/controller-manager-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置默认环境
kubectl config use-context system:kube-controller-manager@kubernetes \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
3.2.5 生成kube-scheduler的证书
cat > scheduler-csr.json << EOF
{
"CN": "system:kube-scheduler",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-scheduler",
"OU": "Kubernetes-manual"
}
]
}
EOF
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
scheduler-csr.json | cfssljson -bare /etc/kubernetes/pki/scheduler
# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.1.36:9443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://127.0.0.1:8443 \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config set-credentials system:kube-scheduler \
--client-certificate=/etc/kubernetes/pki/scheduler.pem \
--client-key=/etc/kubernetes/pki/scheduler-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config set-context system:kube-scheduler@kubernetes \
--cluster=kubernetes \
--user=system:kube-scheduler \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
kubectl config use-context system:kube-scheduler@kubernetes \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
3.2.6 生成admin的证书配置
cat > admin-csr.json << EOF
{
"CN": "admin",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:masters",
"OU": "Kubernetes-manual"
}
]
}
EOF
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
admin-csr.json | cfssljson -bare /etc/kubernetes/pki/admin
# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.1.36:9443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://127.0.0.1:8443 \
--kubeconfig=/etc/kubernetes/admin.kubeconfig
# 该命令用于配置一个名为"kubernetes"的集群，并将其应用到/etc/kubernetes/scheduler.kubeconfig文件中。
#
# 该命令的解释如下：
# - `kubectl config set-cluster kubernetes`: 设置一个集群并命名为"kubernetes"。
# - `--certificate-authority=/etc/kubernetes/pki/ca.pem`: 指定集群使用的证书授权机构的路径。
# - `--embed-certs=true`: 该标志指示将证书嵌入到生成的kubeconfig文件中。
# - `--server=https://127.0.0.1:8443`: 指定集群的 API server 位置。
# - `--kubeconfig=/etc/kubernetes/admin.kubeconfig`: 指定要保存 kubeconfig 文件的路径和名称。
kubectl config set-credentials kubernetes-admin \
--client-certificate=/etc/kubernetes/pki/admin.pem \
--client-key=/etc/kubernetes/pki/admin-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config set-context kubernetes-admin@kubernetes \
--cluster=kubernetes \
--user=kubernetes-admin \
--kubeconfig=/etc/kubernetes/admin.kubeconfig
kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig
# 上述命令是使用`kubectl`命令来配置Kubernetes集群中的调度器组件。
#
# `kubectl config use-context`命令用于切换`kubectl`当前使用的上下文。上下文是Kubernetes集群、用户和命名空间的组合，用于确定`kubectl`的连接目标。下面解释这个命令的不同部分：
#
# - `kubernetes-admin@kubernetes`是一个上下文名称。它指定了使用`kubernetes-admin`用户和`kubernetes`命名空间的系统级别上下文。系统级别上下文用于操作Kubernetes核心组件。
#
# - `--kubeconfig=/etc/kubernetes/admin.kubeconfig`用于指定Kubernetes配置文件的路径。Kubernetes配置文件包含连接到Kubernetes集群所需的身份验证和连接信息。
#
# 通过运行以上命令，`kubectl`将使用指定的上下文和配置文件，以便在以后的命令中能正确地与Kubernetes集群中的调度器组件进行交互。
3.2.7 创建kube-proxy证书
在《5.高可用配置》选择使用那种高可用方案
若使用 haproxy、keepalived 那么为 --server=https://192.168.1.36:9443
若使用 nginx方案，那么为 --server=https://127.0.0.1:8443
cat > kube-proxy-csr.json << EOF
{
"CN": "system:kube-proxy",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-proxy",
"OU": "Kubernetes-manual"
}
]
}
EOF
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
kube-proxy-csr.json | cfssljson -bare /etc/kubernetes/pki/kube-proxy
# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.1.36:9443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://127.0.0.1:8443 \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \
--client-certificate=/etc/kubernetes/pki/kube-proxy.pem \
--client-key=/etc/kubernetes/pki/kube-proxy-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config set-context kube-proxy@kubernetes \
--cluster=kubernetes \
--user=kube-proxy \
--kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config use-context kube-proxy@kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
3.2.8 创建ServiceAccount Key ——secret
openssl genrsa -out /etc/kubernetes/pki/sa.key 2048
openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub
3.2.9 将证书发送到其他master节点
#其他节点创建目录
# mkdir /etc/kubernetes/pki/ -p
for NODE in k8s-master02 k8s-master03; do for FILE in $(ls /etc/kubernetes/pki | grep -v etcd); do scp /etc/kubernetes/pki/${FILE} $NODE:/etc/kubernetes/pki/${FILE}; done; for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig; do scp /etc/kubernetes/${FILE} $NODE:/etc/kubernetes/${FILE}; done; done
3.2.10 查看证书
[root@k8s-master01 cby]# ll /etc/kubernetes/pki/
总计 104
-rw-r--r--. 1 root root 1025 4月26日 19:22 admin.csr
-rw-------. 1 root root 1679 4月26日 19:22 admin-key.pem
-rw-r--r--. 1 root root 1444 4月26日 19:22 admin.pem
-rw-r--r--. 1 root root 1415 4月26日 19:22 apiserver.csr
-rw-------. 1 root root 1679 4月26日 19:22 apiserver-key.pem
-rw-r--r--. 1 root root 1805 4月26日 19:22 apiserver.pem
-rw-r--r--. 1 root root 1070 4月26日 19:22 ca.csr
-rw-------. 1 root root 1675 4月26日 19:22 ca-key.pem
-rw-r--r--. 1 root root 1363 4月26日 19:22 ca.pem
-rw-r--r--. 1 root root 1082 4月26日 19:22 controller-manager.csr
-rw-------. 1 root root 1679 4月26日 19:22 controller-manager-key.pem
-rw-r--r--. 1 root root 1501 4月26日 19:22 controller-manager.pem
-rw-r--r--. 1 root root 940 4月26日 19:22 front-proxy-ca.csr
-rw-------. 1 root root 1675 4月26日 19:22 front-proxy-ca-key.pem
-rw-r--r--. 1 root root 1094 4月26日 19:22 front-proxy-ca.pem
-rw-r--r--. 1 root root 903 4月26日 19:22 front-proxy-client.csr
-rw-------. 1 root root 1675 4月26日 19:22 front-proxy-client-key.pem
-rw-r--r--. 1 root root 1188 4月26日 19:22 front-proxy-client.pem
-rw-r--r--. 1 root root 1045 4月26日 19:22 kube-proxy.csr
-rw-------. 1 root root 1679 4月26日 19:22 kube-proxy-key.pem
-rw-r--r--. 1 root root 1464 4月26日 19:22 kube-proxy.pem
-rw-------. 1 root root 1704 4月26日 19:23 sa.key
-rw-r--r--. 1 root root 451 4月26日 19:23 sa.pub
-rw-r--r--. 1 root root 1058 4月26日 19:22 scheduler.csr
-rw-------. 1 root root 1675 4月26日 19:22 scheduler-key.pem
-rw-r--r--. 1 root root 1476 4月26日 19:22 scheduler.pem
[root@k8s-master01 cby]#
[root@k8s-master01 cby]# ll /etc/kubernetes/pki/ | wc -l
27
[root@k8s-master01 cby]#
4.k8s系统组件配置
4.1.etcd配置
详见完整版 https://github.com/cby-chen/Kubernetes
4.1.1master01配置
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master01'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.1.31:2380'
listen-client-urls: 'https://192.168.1.31:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.1.31:2380'
advertise-client-urls: 'https://192.168.1.31:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.1.31:2380,k8s-master02=https://192.168.1.32:2380,k8s-master03=https://192.168.1.33:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
4.1.2master02配置
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master02'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.1.32:2380'
listen-client-urls: 'https://192.168.1.32:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.1.32:2380'
advertise-client-urls: 'https://192.168.1.32:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.1.31:2380,k8s-master02=https://192.168.1.32:2380,k8s-master03=https://192.168.1.33:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
4.1.3master03配置
cat > /etc/etcd/etcd.config.yml << EOF
name: 'k8s-master03'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.1.33:2380'
listen-client-urls: 'https://192.168.1.33:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.1.33:2380'
advertise-client-urls: 'https://192.168.1.33:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.1.31:2380,k8s-master02=https://192.168.1.32:2380,k8s-master03=https://192.168.1.33:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
4.2.创建service（所有master节点操作）
4.2.1创建etcd.service并启动
cat > /usr/lib/systemd/system/etcd.service << EOF
[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target
[Service]
Type=notify
ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
TimeoutSec=0
RestartSec=60
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
[Install]
WantedBy=multi-user.target
Alias=etcd3.service
EOF
4.2.2创建etcd证书目录
mkdir /etc/kubernetes/pki/etcd
ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
systemctl daemon-reload
systemctl enable --now etcd.service
systemctl restart etcd.service
systemctl status etcd.service
4.2.3查看etcd状态
etcdctl --endpoints="192.168.1.33:2379,192.168.1.32:2379,192.168.1.31:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem endpoint status --write-out=table
+-------------------+------------------+---------+-----------------+---------+--------+-----------------------+--------+-----------+------------+-----------+------------+--------------------+--------+--------------------------+-------------------+
| ENDPOINT | ID | VERSION | STORAGE VERSION | DB SIZE | IN USE | PERCENTAGE NOT IN USE | QUOTA | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS | DOWNGRADE TARGET VERSION | DOWNGRADE ENABLED |
+-------------------+------------------+---------+-----------------+---------+--------+-----------------------+--------+-----------+------------+-----------+------------+--------------------+--------+--------------------------+-------------------+
| 192.168.1.33:2379 | 8065f2e59c8d68c | 3.6.11 | 3.6.0 | 20 kB | 16 kB | 20% | 2.1 GB | false | false | 3 | 13 | 13 | | | false |
| 192.168.1.32:2379 | b7b7ad6bf4db3f28 | 3.6.11 | 3.6.0 | 20 kB | 16 kB | 20% | 2.1 GB | false | false | 3 | 13 | 13 | | | false |
| 192.168.1.31:2379 | bf047bcfe3b9bf27 | 3.6.11 | 3.6.0 | 20 kB | 16 kB | 20% | 2.1 GB | true | false | 3 | 13 | 13 | | | false |
+-------------------+------------------+---------+-----------------+---------+--------+-----------------------+--------+-----------+------------+-----------+------------+--------------------+--------+--------------------------+-------------------+
5.高可用配置（在Master服务器上操作）
注意 5.1.1 和5.1.2 二选一即可*
选择使用那种高可用方案，同时可以俩种都选用，实现内外兼顾的效果，比如： 5.1 的 NGINX方案实现集群内的高可用 5.2 的 haproxy、keepalived 方案实现集群外访问
在《3.2.生成k8s相关证书》
若使用 nginx方案，那么为 --server=https://127.0.0.1:8443
若使用 haproxy、keepalived 那么为 --server=https://192.168.1.36:9443
5.1 NGINX高可用方案
5.1.1 进行编译
# 安装编译环境
yum install gcc -y
# 下载解压nginx二进制文件
# wget http://nginx.org/download/nginx-1.25.3.tar.gz
tar xvf nginx-*.tar.gz
cd nginx-*
# 进行编译
./configure --with-stream --without-http --without-http_uwsgi_module --without-http_scgi_module --without-http_fastcgi_module
make && make install
# 拷贝编译好的nginx
node='k8s-master02 k8s-master03 k8s-node01 k8s-node02'
for NODE in $node; do scp -r /usr/local/nginx/ $NODE:/usr/local/nginx/; done
5.1.2 写入启动配置
在所有主机上执行
# 写入nginx配置文件
cat > /usr/local/nginx/conf/kube-nginx.conf <<EOF
worker_processes 1;
events {
worker_connections 1024;
}
stream {
upstream backend {
least_conn;
hash $remote_addr consistent;
server 192.168.1.31:6443 max_fails=3 fail_timeout=30s;
server 192.168.1.32:6443 max_fails=3 fail_timeout=30s;
server 192.168.1.33:6443 max_fails=3 fail_timeout=30s;
}
server {
listen 127.0.0.1:8443;
proxy_connect_timeout 1s;
proxy_pass backend;
}
}
EOF
# 写入启动配置文件
cat > /etc/systemd/system/kube-nginx.service <<EOF
[Unit]
Description=kube-apiserver nginx proxy
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=forking
ExecStartPre=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx -t
ExecStart=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx
ExecReload=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx -s reload
PrivateTmp=true
Restart=always
RestartSec=5
StartLimitInterval=0
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
# 设置开机自启
systemctl daemon-reload
systemctl enable --now kube-nginx.service
systemctl restart kube-nginx.service
systemctl status kube-nginx.service
5.2 keepalived和haproxy 高可用方案
5.2.1安装keepalived和haproxy服务
systemctl disable --now firewalld
setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
yum -y install keepalived haproxy
5.2.2修改haproxy配置文件（配置文件一样）
cp /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg.bak
cat >/etc/haproxy/haproxy.cfg<<"EOF"
global
maxconn 2000
ulimit-n 16384
log 127.0.0.1 local0 err
stats timeout 30s
defaults
log global
mode http
option httplog
timeout connect 5000
timeout client 50000
timeout server 50000
timeout http-request 15s
timeout http-keep-alive 15s
frontend monitor-in
bind *:33305
mode http
option httplog
monitor-uri /monitor
frontend k8s-master
bind 0.0.0.0:9443
bind 127.0.0.1:9443
mode tcp
option tcplog
tcp-request inspect-delay 5s
default_backend k8s-master
backend k8s-master
mode tcp
option tcplog
option tcp-check
balance roundrobin
default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100
server k8s-master01 192.168.1.31:6443 check
server k8s-master02 192.168.1.32:6443 check
server k8s-master03 192.168.1.33:6443 check
EOF
参数
详见完整版 https://github.com/cby-chen/Kubernetes
5.2.3Master01配置keepalived master节点
cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state MASTER
# 注意网卡名
interface ens32
mcast_src_ip 192.168.1.31
virtual_router_id 51
priority 100
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.1.36
}
track_script {
chk_apiserver
} }
EOF
5.2.4Master02配置keepalived backup节点
cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
# 注意网卡名
interface ens32
mcast_src_ip 192.168.1.32
virtual_router_id 51
priority 80
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.1.36
}
track_script {
chk_apiserver
} }
EOF
5.2.5Master03配置keepalived backup节点
cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
# 注意网卡名
interface ens32
mcast_src_ip 192.168.1.33
virtual_router_id 51
priority 50
nopreempt
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.1.36
}
track_script {
chk_apiserver
} }
EOF
参数
详见完整版 https://github.com/cby-chen/Kubernetes
5.2.6健康检查脚本配置（lb主机）
cat > /etc/keepalived/check_apiserver.sh << EOF
#!/bin/bash
err=0
for k in \$(seq 1 3)
do
check_code=\$(pgrep haproxy)
if [[ \$check_code == "" ]]; then
err=\$(expr \$err + 1)
sleep 1
continue
else
err=0
break
fi
done
if [[ \$err != "0" ]]; then
echo "systemctl stop keepalived"
/usr/bin/systemctl stop keepalived
exit 1
else
exit 0
fi
EOF
# 给脚本授权
chmod +x /etc/keepalived/check_apiserver.sh
5.2.7启动服务
systemctl daemon-reload
systemctl enable --now haproxy.service
systemctl enable --now keepalived.service
systemctl status haproxy.service
systemctl status keepalived.service
5.2.8测试高可用
# 能ping同
[root@k8s-node02 ~]# ping 192.168.1.36
# 能telnet访问
[root@k8s-node02 ~]# telnet 192.168.1.36 9443
# 关闭主节点，看vip是否漂移到备节点
6.k8s组件配置
所有k8s节点创建以下目录
mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes
6.1.创建apiserver（所有master节点）
6.1.1master01节点配置
# 若关闭IPv6 删除 --service-cluster-ip-range 的 IPv6 即可
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
--v=2 \\
--allow-privileged=true \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=192.168.1.31 \\
--service-cluster-ip-range=10.96.0.0/16,fd00:1111::/112 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://192.168.1.31:2379,https://192.168.1.32:2379,https://192.168.1.33:2379 \\
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
--client-ca-file=/etc/kubernetes/pki/ca.pem \\
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \\
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \\
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \\
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \\
--service-account-key-file=/etc/kubernetes/pki/sa.pub \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
--authorization-mode=Node,RBAC \\
--enable-bootstrap-token-auth=true \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \\
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \\
--requestheader-allowed-names=aggregator \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-username-headers=X-Remote-User \\
--enable-aggregator-routing=true
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF
6.1.2master02节点配置
# 若关闭IPv6 删除 --service-cluster-ip-range 的 IPv6 即可
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
--v=2 \\
--allow-privileged=true \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=192.168.1.32 \\
--service-cluster-ip-range=10.96.0.0/16,fd00:1111::/112 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://192.168.1.31:2379,https://192.168.1.32:2379,https://192.168.1.33:2379 \\
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
--client-ca-file=/etc/kubernetes/pki/ca.pem \\
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \\
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \\
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \\
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \\
--service-account-key-file=/etc/kubernetes/pki/sa.pub \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\
--authorization-mode=Node,RBAC \\
--enable-bootstrap-token-auth=true \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \\
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \\
--requestheader-allowed-names=aggregator \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-username-headers=X-Remote-User \\
--enable-aggregator-routing=true
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF
6.1.3master03节点配置
# 若关闭IPv6 删除 --service-cluster-ip-range 的 IPv6 即可
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
--v=2 \\
--allow-privileged=true \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=192.168.1.33 \\
--service-cluster-ip-range=10.96.0.0/16,fd00:1111::/112 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://192.168.1.31:2379,https://192.168.1.32:2379,https://192.168.1.33:2379 \\
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
--client-ca-file=/etc/kubernetes/pki/ca.pem \\
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \\
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \\
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \\
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \\
--service-account-key-file=/etc/kubernetes/pki/sa.pub \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\
--authorization-mode=Node,RBAC \\
--enable-bootstrap-token-auth=true \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \\
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \\
--requestheader-allowed-names=aggregator \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-username-headers=X-Remote-User \\
--enable-aggregator-routing=true
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF
参数
详见完整版 https://github.com/cby-chen/Kubernetes
6.1.4启动apiserver（所有master节点）
systemctl daemon-reload
# 用于重新加载systemd管理的单位文件。当你新增或修改了某个单位文件（如.service文件、.socket文件等），需要运行该命令来刷新systemd对该文件的配置。
systemctl enable --now kube-apiserver.service
# 启用并立即启动kube-apiserver.service单元。kube-apiserver.service是kube-apiserver守护进程的systemd服务单元。
systemctl restart kube-apiserver.service
# 重启kube-apiserver.service单元，即重新启动etcd守护进程。
systemctl status kube-apiserver.service
# kube-apiserver.service单元的当前状态，包括运行状态、是否启用等信息。
6.2.配置kube-controller-manager service
# 所有master节点配置，且配置相同
# 172.16.0.0/16为pod网段，按需求设置你自己的网段
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-controller-manager \\
--v=2 \\
--bind-address=0.0.0.0 \\
--root-ca-file=/etc/kubernetes/pki/ca.pem \\
--cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \\
--cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \\
--service-account-private-key-file=/etc/kubernetes/pki/sa.key \\
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \\
--leader-elect=true \\
--use-service-account-credentials=true \\
--node-monitor-grace-period=40s \\
--node-monitor-period=5s \\
--controllers=*,bootstrapsigner,tokencleaner \\
--allocate-node-cidrs=true \\
--service-cluster-ip-range=10.96.0.0/16,fd00:1111::/112 \\
--cluster-cidr=172.16.0.0/16,fd00:2222::/112 \\
--node-cidr-mask-size-ipv4=24 \\
--node-cidr-mask-size-ipv6=120 \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
# 关闭IPv6
# 删除 --service-cluster-ip-range 中的IPv6地址
# 删除 --cluster-cidr 中的IPv6地址
# 删除 --node-cidr-mask-size-ipv6=120
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-controller-manager \\
--v=2 \\
--bind-address=0.0.0.0 \\
--root-ca-file=/etc/kubernetes/pki/ca.pem \\
--cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \\
--cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \\
--service-account-private-key-file=/etc/kubernetes/pki/sa.key \\
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \\
--leader-elect=true \\
--use-service-account-credentials=true \\
--node-monitor-grace-period=40s \\
--node-monitor-period=5s \\
--controllers=*,bootstrapsigner,tokencleaner \\
--allocate-node-cidrs=true \\
--service-cluster-ip-range=10.96.0.0/16 \\
--cluster-cidr=172.16.0.0/16 \\
--node-cidr-mask-size-ipv4=24 \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
参数
详见完整版 https://github.com/cby-chen/Kubernetes
6.2.1启动kube-controller-manager，并查看状态
systemctl daemon-reload
systemctl enable --now kube-controller-manager.service
systemctl restart kube-controller-manager.service
systemctl status kube-controller-manager.service
6.3.配置kube-scheduler service
6.3.1所有master节点配置，且配置相同
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-scheduler \\
--v=2 \\
--bind-address=0.0.0.0 \\
--leader-elect=true \\
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
参数
详见完整版 https://github.com/cby-chen/Kubernetes
6.3.2启动并查看服务状态
systemctl daemon-reload
systemctl enable --now kube-scheduler.service
systemctl restart kube-scheduler.service
systemctl status kube-scheduler.service
7.TLS Bootstrapping配置
7.1在master01上配置
# 在《5.高可用配置》选择使用那种高可用方案
# 若使用 haproxy、keepalived 那么为 `--server=https://192.168.1.36:9443`
# 若使用 nginx方案，那么为 `--server=https://127.0.0.1:8443`
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true --server=https://127.0.0.1:8443 \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
# 可以使用这个命令进行创建token也可以使用我的
echo "$(head -c 6 /dev/urandom | md5sum | head -c 6)"."$(head -c 16 /dev/urandom | md5sum | head -c 16)"
kubectl config set-credentials tls-bootstrap-token-user \
--token=c8ad9c.2e4d610cf3e7426e \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-context tls-bootstrap-token-user@kubernetes \
--cluster=kubernetes \
--user=tls-bootstrap-token-user \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config use-context tls-bootstrap-token-user@kubernetes \
--kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
# token的位置在bootstrap.secret.yaml，如果修改的话到这个文件修改
mkdir -p /root/.kube ; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config
7.2查看集群状态，没问题的话继续后续操作
# 1.28 版本只能查看到一个etcd 属于正常现象
# export ETCDCTL_API=3
# etcdctl --endpoints="192.168.1.33:2379,192.168.1.32:2379,192.168.1.31:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem endpoint status --write-out=table
kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-0 Healthy ok
# 写入bootstrap-token
cat > bootstrap.secret.yaml << EOF
apiVersion: v1
kind: Secret
metadata:
name: bootstrap-token-c8ad9c
namespace: kube-system
type: bootstrap.kubernetes.io/token
stringData:
description: "The default bootstrap token generated by 'kubelet '."
token-id: c8ad9c
token-secret: 2e4d610cf3e7426e
usage-bootstrap-authentication: "true"
usage-bootstrap-signing: "true"
auth-extra-groups: system:bootstrappers:default-node-token,system:bootstrappers:worker,system:bootstrappers:ingress
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: kubelet-bootstrap
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:node-bootstrapper
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: node-autoapprove-bootstrap
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:certificates.k8s.io:certificatesigningrequests:nodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: node-autoapprove-certificate-rotation
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:certificates.k8s.io:certificatesigningrequests:selfnodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:nodes
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:kube-apiserver-to-kubelet
rules:
- apiGroups:
- ""
resources:
- nodes/proxy
- nodes/stats
- nodes/log
- nodes/spec
- nodes/metrics
verbs:
- "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: system:kube-apiserver
namespace: ""
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:kube-apiserver-to-kubelet
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: User
name: kube-apiserver
EOF
# 切记执行，别忘记！！！
kubectl create -f bootstrap.secret.yaml
8.node节点配置
8.1.在master01上将证书复制到node节点
cd /etc/kubernetes/
for NODE in k8s-master02 k8s-master03 k8s-node01 k8s-node02; do ssh $NODE mkdir -p /etc/kubernetes/pki; for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig kube-proxy.kubeconfig; do scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}; done; done
8.2.kubelet配置
注意 ： 8.2.1 和 8.2.2 需要和 上方 2.1 和 2.2 对应起来
8.2.1配置kubelet
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=network-online.target firewalld.service cri-docker.service docker.socket containerd.service
Wants=network-online.target
Requires=docker.socket containerd.service
[Service]
ExecStart=/usr/local/bin/kubelet \\
--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig \\
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig \\
--config=/etc/kubernetes/kubelet-conf.yml \\
--node-labels=node.kubernetes.io/node=
[Install]
WantedBy=multi-user.target
EOF
# IPv6示例
# 若不使用IPv6那么忽略此项即可
# 下方 --node-ip 更换为每个节点的IP即可
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=network-online.target firewalld.service cri-docker.service docker.socket containerd.service
Wants=network-online.target
Requires=docker.socket containerd.service
[Service]
ExecStart=/usr/local/bin/kubelet \\
--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig \\
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig \\
--config=/etc/kubernetes/kubelet-conf.yml \\
--node-labels=node.kubernetes.io/node= \\
--node-ip=192.168.1.31,fc00::31
[Install]
WantedBy=multi-user.target
EOF
# 自动获取IP编制
# 1. 自动获取本机 IPv4 地址 (根据实际情况，这里假设网卡名为 eth0，如果不同请修改)
# 如果你的网卡名不同，可以用 ip addr show | grep 'inet ' | grep -v '127.0.0.1' | awk '{print $2}' | cut -d/ -f1 自动获取
NODE_IPV4=$(hostname -I | awk '{print $1}')
# 2. 根据 IPv4 自动推算 IPv6 (针对你提供的 192.168.1.x -> fc00::x 规则)
# 提取最后一段数字
LAST_OCTET=$(echo $NODE_IPV4 | awk -F. '{print $4}')
NODE_IPV6="fc00::${LAST_OCTET}"
# 3. 生成 kubelet.service 文件
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=network-online.target firewalld.service cri-docker.service docker.socket containerd.service
Wants=network-online.target
Requires=docker.socket containerd.service
[Service]
ExecStart=/usr/local/bin/kubelet \\
--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig \\
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig \\
--config=/etc/kubernetes/kubelet-conf.yml \\
--node-labels=node.kubernetes.io/node= \\
--node-ip=${NODE_IPV4},${NODE_IPV6}
[Install]
WantedBy=multi-user.target
EOF
# 查看是否正确
cat /usr/lib/systemd/system/kubelet.service
8.2.2所有k8s节点创建kubelet的配置文件
当使用docker作为Runtime
cat > /etc/kubernetes/kubelet-conf.yml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
enableServer: true
staticPodPath: /etc/kubernetes/manifests
syncFrequency: 1m0s
fileCheckFrequency: 20s
httpCheckFrequency: 20s
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
rotateCertificates: true
authentication:
x509:
clientCAFile: /etc/kubernetes/pki/ca.pem
webhook:
enabled: true
cacheTTL: 2m0s
anonymous:
enabled: true
authorization:
mode: AlwaysAllow
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
registryPullQPS: 5
registryBurst: 10
eventRecordQPS: 50
eventBurst: 100
enableDebuggingHandlers: true
healthzPort: 10248
healthzBindAddress: 127.0.0.1
oomScoreAdj: -999
clusterDomain: cluster.local
clusterDNS:
- 10.0.0.10
streamingConnectionIdleTimeout: 4h0m0s
nodeStatusUpdateFrequency: 10s
nodeStatusReportFrequency: 5m0s
nodeLeaseDurationSeconds: 40
imageMinimumGCAge: 2m0s
imageMaximumGCAge: 0s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
volumeStatsAggPeriod: 1m0s
cgroupsPerQOS: true
cgroupDriver: systemd
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
memoryManagerPolicy: None
topologyManagerPolicy: none
topologyManagerScope: container
runtimeRequestTimeout: 2m0s
hairpinMode: promiscuous-bridge
maxPods: 110
podPidsLimit: -1
resolvConf: /etc/resolv.conf
cpuCFSQuota: true
cpuCFSQuotaPeriod: 100ms
nodeStatusMaxImages: 50
maxOpenFiles: 1000000
contentType: application/vnd.kubernetes.protobuf
kubeAPIQPS: 50
kubeAPIBurst: 100
serializeImagePulls: true
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
imagefs.inodesFree: 5%
evictionPressureTransitionPeriod: 1m0s
mergeDefaultEvictionSettings: false
enableControllerAttachDetach: true
makeIPTablesUtilChains: true
iptablesMasqueradeBit: 14
iptablesDropBit: 15
featureGates:
AllAlpha: false
failSwapOn: false
memorySwap: {}
containerLogMaxSize: 10Mi
containerLogMaxFiles: 5
configMapAndSecretChangeDetectionStrategy: Watch
enforceNodeAllocatable:
- pods
volumePluginDir: /usr/libexec/kubernetes/kubelet-plugins/volume/exec/
logging:
format: text
flushFrequency: 5s
verbosity: 3
options:
json:
infoBufferSize: 0
enableSystemLogHandler: true
enableSystemLogQuery: false
shutdownGracePeriod: 0s
shutdownGracePeriodCriticalPods: 0s
enableProfilingHandler: true
enableDebugFlagsHandler: true
seccompDefault: false
memoryThrottlingFactor: 0.9
registerNode: true
localStorageCapacityIsolation: true
containerRuntimeEndpoint: unix:///run/cri-dockerd.sock
EOF
8.2.3当使用Containerd作为Runtime
cat > /etc/kubernetes/kubelet-conf.yml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
enableServer: true
staticPodPath: /etc/kubernetes/manifests
syncFrequency: 1m0s
fileCheckFrequency: 20s
httpCheckFrequency: 20s
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
rotateCertificates: true
authentication:
x509:
clientCAFile: /etc/kubernetes/pki/ca.pem
webhook:
enabled: true
cacheTTL: 2m0s
anonymous:
enabled: true
authorization:
mode: AlwaysAllow
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
registryPullQPS: 5
registryBurst: 10
eventRecordQPS: 50
eventBurst: 100
enableDebuggingHandlers: true
healthzPort: 10248
healthzBindAddress: 127.0.0.1
oomScoreAdj: -999
clusterDomain: cluster.local
clusterDNS:
- 10.0.0.10
streamingConnectionIdleTimeout: 4h0m0s
nodeStatusUpdateFrequency: 10s
nodeStatusReportFrequency: 5m0s
nodeLeaseDurationSeconds: 40
imageMinimumGCAge: 2m0s
imageMaximumGCAge: 0s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
volumeStatsAggPeriod: 1m0s
cgroupsPerQOS: true
cgroupDriver: systemd
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
memoryManagerPolicy: None
topologyManagerPolicy: none
topologyManagerScope: container
runtimeRequestTimeout: 2m0s
hairpinMode: promiscuous-bridge
maxPods: 110
podPidsLimit: -1
resolvConf: /etc/resolv.conf
cpuCFSQuota: true
cpuCFSQuotaPeriod: 100ms
nodeStatusMaxImages: 50
maxOpenFiles: 1000000
contentType: application/vnd.kubernetes.protobuf
kubeAPIQPS: 50
kubeAPIBurst: 100
serializeImagePulls: true
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
imagefs.inodesFree: 5%
evictionPressureTransitionPeriod: 1m0s
mergeDefaultEvictionSettings: false
enableControllerAttachDetach: true
makeIPTablesUtilChains: true
iptablesMasqueradeBit: 14
iptablesDropBit: 15
featureGates:
AllAlpha: false
failSwapOn: false
memorySwap: {}
containerLogMaxSize: 10Mi
containerLogMaxFiles: 5
configMapAndSecretChangeDetectionStrategy: Watch
enforceNodeAllocatable:
- pods
volumePluginDir: /usr/libexec/kubernetes/kubelet-plugins/volume/exec/
logging:
format: text
flushFrequency: 5s
verbosity: 3
options:
json:
infoBufferSize: 0
enableSystemLogHandler: true
enableSystemLogQuery: false
shutdownGracePeriod: 0s
shutdownGracePeriodCriticalPods: 0s
enableProfilingHandler: true
enableDebugFlagsHandler: true
seccompDefault: false
memoryThrottlingFactor: 0.9
registerNode: true
localStorageCapacityIsolation: true
containerRuntimeEndpoint: unix:///run/containerd/containerd.sock
EOF
8.2.4启动kubelet
systemctl daemon-reload
systemctl enable --now kubelet.service
systemctl restart kubelet.service
systemctl status kubelet.service
8.2.5查看集群
[root@k8s-master01 cby]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 NotReady <none> 9s v1.36.0
k8s-master02 NotReady <none> 7s v1.36.0
k8s-master03 NotReady <none> 6s v1.36.0
k8s-node01 NotReady <none> 4s v1.36.0
k8s-node02 NotReady <none> 4s v1.36.0
[root@k8s-master01 cby]#
8.2.6查看容器运行时
[root@k8s-master01 cby]# kubectl describe node | grep Runtime
Container Runtime Version: containerd://2.2.3
Container Runtime Version: containerd://2.2.3
Container Runtime Version: containerd://2.2.3
Container Runtime Version: containerd://2.2.3
Container Runtime Version: containerd://2.2.3
[root@k8s-master01 cby]#
[root@k8s-master01 ~]# kubectl describe node | grep Runtime
Container Runtime Version: docker://29.4.3
Container Runtime Version: docker://29.4.3
Container Runtime Version: docker://29.4.3
Container Runtime Version: docker://29.4.3
Container Runtime Version: docker://29.4.3
[root@k8s-master01 ~]#
8.3.kube-proxy配置
8.3.1将kubeconfig发送至其他节点
# master-1执行
for NODE in k8s-master02 k8s-master03 k8s-node01 k8s-node02; do scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig; done
8.3.2所有k8s节点添加kube-proxy的service文件
cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Kube Proxy
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-proxy \\
--config=/etc/kubernetes/kube-proxy.yaml \\
--cluster-cidr=172.16.0.0/16,fd00:2222::/112 \\
--v=2
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
# 关闭IPv6
# 删除 --cluster-cidr 的IPv6地址
cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Kube Proxy
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-proxy \\
--config=/etc/kubernetes/kube-proxy.yaml \\
--cluster-cidr=172.16.0.0/16 \\
--v=2
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
# 这是一个 systemd 服务单元文件的示例，用于配置 Kubernetes Kube Proxy 服务。下面是对其中一些字段的详细解释：
#
# [Unit]
#
# Description: 描述了该服务单元的用途，这里是 Kubernetes Kube Proxy。
# Documentation: 指定了该服务单元的文档地址，即 https://github.com/kubernetes/kubernetes。
# After: 指定该服务单元应在 network.target（网络目标）之后启动。
# [Service]
#
# ExecStart: 指定了启动 Kube Proxy 服务的命令。通过 /usr/local/bin/kube-proxy 命令启动，并指定了配置文件的路径为 /etc/kubernetes/kube-proxy.yaml，同时指定了日志级别为 2。
# Restart: 配置了服务在失败或退出后自动重启。
# RestartSec: 配置了重启间隔，这里是每次重启之间的等待时间为 10 秒。
# [Install]
#
# WantedBy: 指定了该服务单元的安装目标为 multi-user.target（多用户目标），表示该服务将在多用户模式下启动。
# 通过配置这些字段，你可以启动和管理 Kubernetes Kube Proxy 服务。请注意，你需要根据实际情况修改 ExecStart 中的路径和文件名，确保与你的环境一致。另外，可以根据需求修改其他字段的值，以满足你的特定要求。
8.3.3所有k8s节点添加kube-proxy的配置
cat > /etc/kubernetes/kube-proxy.yaml << EOF
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
clientConnection:
acceptContentTypes: ""
burst: 10
contentType: application/vnd.kubernetes.protobuf
kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
qps: 5
clusterCIDR: 172.16.0.0/16,fd00:2222::/112
configSyncPeriod: 15m0s
conntrack:
max: null
maxPerCore: 32768
min: 131072
tcpCloseWaitTimeout: 1h0m0s
tcpEstablishedTimeout: 24h0m0s
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: ""
iptables:
masqueradeAll: false
masqueradeBit: 14
minSyncPeriod: 0s
syncPeriod: 30s
ipvs:
masqueradeAll: true
minSyncPeriod: 5s
scheduler: "rr"
syncPeriod: 30s
kind: KubeProxyConfiguration
metricsBindAddress: 127.0.0.1:10249
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: -999
portRange: ""
udpIdleTimeout: 250ms
EOF
8.3.4启动kube-proxy
systemctl daemon-reload
systemctl enable --now kube-proxy.service
systemctl restart kube-proxy.service
systemctl status kube-proxy.service
9.安装网络插件
注意 9.1 和 9.2 二选其一即可，建议在此处创建好快照后在进行操作，后续出问题可以回滚
** centos7 要升级libseccomp 不然 无法安装网络插件**
# https://github.com/opencontainers/runc/releases
# 升级runc
# wget https://github.com/opencontainers/runc/releases/download/v1.1.12/runc.amd64
install -m 755 runc.amd64 /usr/local/sbin/runc
cp -p /usr/local/sbin/runc /usr/local/bin/runc
cp -p /usr/local/sbin/runc /usr/bin/runc
#查看当前版本
[root@k8s-master-1 ~]# rpm -qa | grep libseccomp
libseccomp-2.5.2-2.el9.x86_64
#下载高于2.4以上的包
# yum -y install http://rpmfind.net/linux/centos/8-stream/BaseOS/x86_64/os/Packages/libseccomp-2.5.1-1.el8.x86_64.rpm
# 清华源
# yum -y install https://mirrors.tuna.tsinghua.edu.cn/centos/8-stream/BaseOS/x86_64/os/Packages/libseccomp-2.5.1-1.el8.x86_64.rpm
9.1安装Calico
9.1.1更改calico网段
# 查看版本
https://github.com/projectcalico/calico/tags
# 安装operator
kubectl create -f https://raw.githubusercontent.com/projectcalico/calico/v3.32.0/manifests/tigera-operator.yaml
# 下载配置文件
curl https://raw.githubusercontent.com/projectcalico/calico/v3.32.0/manifests/custom-resources.yaml -O
# 修改地址池
vim custom-resources.yaml
apiVersion: operator.tigera.io/v1
kind: Installation
metadata:
name: default
spec:
calicoNetwork:
ipPools:
- name: default-ipv4-ippool
blockSize: 26
cidr: 172.16.0.0/16
encapsulation: VXLANCrossSubnet
natOutgoing: Enabled
nodeSelector: all()
# 修改地址池
vim custom-resources.yaml
apiVersion: operator.tigera.io/v1
kind: Installation
metadata:
name: default
spec:
calicoNetwork:
ipPools:
- name: ipv4-ippool
cidr: 172.16.0.0/16
blockSize: 26
# encapsulation: IPIP
encapsulation: VXLANCrossSubnet
natOutgoing: Enabled
nodeSelector: all()
- name: ipv6-ippool
cidr: "fd00:2222::/112"
blockSize: 122
encapsulation: VXLANCrossSubnet
natOutgoing: Enabled
nodeSelector: all()
nodeAddressAutodetectionV4:
interface: "eth.*|en.*"
nodeAddressAutodetectionV6:
interface: "eth.*|en.*"
# 打开vxlan内核 适用于大多数使用 systemd 的发行版
echo "vxlan" | sudo tee /etc/modules-load.d/vxlan.conf
systemctl restart systemd-modules-load.service
lsmod | grep vxlan
# 执行安装
kubectl create -f custom-resources.yaml
# 安装客户端
curl -L https://github.com/projectcalico/calico/releases/download/v3.32.0/calicoctl-linux-amd64 -o calicoctl
# 给客户端添加执行权限
chmod +x ./calicoctl
# 查看集群节点
./calicoctl get nodes --allow-version-mismatch
# 查看集群节点状态
./calicoctl node status --allow-version-mismatch
#查看地址池
./calicoctl get ipPool --allow-version-mismatch
./calicoctl get ipPool --allow-version-mismatch -o yaml
9.1.2查看容器状态
# calico 初始化会很慢 需要耐心等待一下，大约十分钟左右
[root@k8s-master01 kubernetes-v1.36.0]# kubectl get pod -A
NAMESPACE NAME READY STATUS RESTARTS AGE
calico-system calico-apiserver-7bb46cd974-2tb62 1/1 Running 0 7m46s
calico-system calico-apiserver-7bb46cd974-92p96 1/1 Running 0 7m46s
calico-system calico-kube-controllers-7c4f878bd8-xptks 1/1 Running 0 7m45s
calico-system calico-node-6wbsv 1/1 Running 0 7m46s
calico-system calico-node-djq59 1/1 Running 0 7m46s
calico-system calico-node-dm97b 1/1 Running 0 7m46s
calico-system calico-node-lvq6w 1/1 Running 0 7m46s
calico-system calico-node-pmq6v 1/1 Running 0 7m46s
calico-system calico-typha-758c8bf6f7-8tkss 1/1 Running 0 7m43s
calico-system calico-typha-758c8bf6f7-dqsqq 1/1 Running 0 7m46s
calico-system calico-typha-758c8bf6f7-h7569 1/1 Running 0 7m43s
calico-system csi-node-driver-4rld6 2/2 Running 0 7m45s
calico-system csi-node-driver-8krh7 2/2 Running 0 7m45s
calico-system csi-node-driver-bvq9q 2/2 Running 0 7m45s
calico-system csi-node-driver-qcb9d 2/2 Running 0 7m45s
calico-system csi-node-driver-xkkcj 2/2 Running 0 7m45s
calico-system goldmane-6885dcb7d-k26sd 1/1 Running 0 7m46s
calico-system whisker-898cf7b47-75pdh 2/2 Running 0 6m53s
tigera-operator tigera-operator-85dbff4478-sntj6 1/1 Running 0 9m13s
[root@k8s-master01 kubernetes-v1.36.0]#
# IPIP模式 仅支持IPv4，不支持IPv6，有tun网口
[root@k8s-master01 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 100 0 0 ens32
172.17.125.0 192.168.1.34 255.255.255.192 UG 0 0 0 tunl0
172.18.195.0 192.168.1.33 255.255.255.192 UG 0 0 0 tunl0
172.25.92.64 192.168.1.32 255.255.255.192 UG 0 0 0 tunl0
172.25.244.192 0.0.0.0 255.255.255.192 U 0 0 0 *
172.25.244.193 0.0.0.0 255.255.255.255 UH 0 0 0 calif3e9d7544a4
172.27.14.192 192.168.1.35 255.255.255.192 UG 0 0 0 tunl0
192.168.1.0 0.0.0.0 255.255.255.0 U 100 0 0 ens32
[root@k8s-master01 ~]#
# VXLANCrossSubnet模式，无tun网口
[root@k8s-master01 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 100 0 0 ens32
172.16.32.128 0.0.0.0 255.255.255.192 U 0 0 0 *
172.16.32.129 0.0.0.0 255.255.255.255 UH 1024 0 0 calic9ff772e94d
172.16.58.192 192.168.1.35 255.255.255.192 UG 0 0 0 ens32
172.16.85.192 192.168.1.34 255.255.255.192 UG 0 0 0 ens32
172.16.122.128 192.168.1.32 255.255.255.192 UG 0 0 0 ens32
172.16.195.0 192.168.1.33 255.255.255.192 UG 0 0 0 ens32
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
192.168.1.0 0.0.0.0 255.255.255.0 U 100 0 0 ens32
[root@k8s-master01 ~]#
# 路由表
[root@k8s-master01 ~]# route -n -4 -6 | grep vxlan
fe80::/64 :: U 256 1 0 vxlan.calico
fd00:100::88bd:e5c3:433c:2080/128 :: Un 0 2 0 vxlan-v6.calico
fe80::/128 :: Un 0 3 0 vxlan.calico
fe80::6454:d1ff:fe67:d36d/128 :: Un 0 2 0 vxlan.calico
ff00::/8 :: U 256 1 0 vxlan.calico
ff00::/8 :: U 256 1 0 vxlan-v6.calico
[root@k8s-master01 ~]#
9.1.3删除
kubectl delete -f https://raw.githubusercontent.com/projectcalico/calico/v3.32.0/manifests/tigera-operator.yaml --force --grace-period=0
kubectl delete -f https://raw.githubusercontent.com/projectcalico/calico/v3.32.0/manifests/custom-resources.yaml --force --grace-period=0
# 在所有主机上执行
modprobe -r ipip # 删除 IPIP 模式虚拟网卡
modprobe -r vxlan # 删除 VXLAN 模式虚拟网卡
# 在所有主机上执行
sudo rm -rf /etc/cni/net.d/*calico*
sudo rm -f /opt/cni/bin/calico*
sudo rm -f /usr/local/bin/calico*
sudo rm -rf /var/lib/cni/networks/calico/
# 在所有主机上执行
systemctl restart kubelet
9.2 安装cilium
9.2.1 安装helm
# [root@k8s-master01 ~]# curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
# [root@k8s-master01 ~]# chmod 700 get_helm.sh
# [root@k8s-master01 ~]# ./get_helm.sh
# wget https://get.helm.sh/helm-v4.0.4-linux-amd64.tar.gz
tar xvf helm-*-linux-amd64.tar.gz
cp linux-amd64/helm /usr/local/bin/
9.2.2 安装cilium
# 添加源
helm repo add cilium https://helm.cilium.io
# 修改为国内源
helm pull cilium/cilium
tar xvf cilium-*.tgz
cd cilium/
# sed -i "s#quay.io/#quay.m.daocloud.io/#g" values.yaml
# 默认参数安装
helm install cilium ./cilium/ -n kube-system
helm install cilium cilium/cilium --version 1.19.3 -n kube-system
# 启用ipv6
# helm install cilium cilium/cilium -n kube-system --set ipv6.enabled=true
# 启用路由信息和监控插件
# helm install cilium ./cilium/ --namespace kube-system --set ipv6.enabled=true --set hubble.relay.enabled=true --set hubble.ui.enabled=true --set prometheus.enabled=true --set operator.prometheus.enabled=true --set hubble.enabled=true --set hubble.metrics.enabled="{dns,drop,tcp,flow,port-distribution,icmp,http}"
9.2.3 查看
[root@k8s-master01 ~]# kubectl get pod -A | grep cil
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system cilium-2tnfb 1/1 Running 0 60s
kube-system cilium-5tgcb 1/1 Running 0 60s
kube-system cilium-6shf5 1/1 Running 0 60s
kube-system cilium-ccbcx 1/1 Running 0 60s
kube-system cilium-cppft 1/1 Running 0 60s
kube-system cilium-operator-675f685d59-7q27q 1/1 Running 0 60s
kube-system cilium-operator-675f685d59-kwmqz 1/1 Running 0 60s
[root@k8s-master01 ~]#
9.2.4 下载专属监控面板
安装时候没有创建 监控可以忽略
[root@k8s-master01 yaml]# wget https://raw.githubusercontent.com/cilium/cilium/1.19.3/examples/kubernetes/addons/prometheus/monitoring-example.yaml
[root@k8s-master01 yaml]# sed -i "s#docker.io/#jockerhub.com/#g" monitoring-example.yaml
[root@k8s-master01 yaml]# kubectl apply -f monitoring-example.yaml
namespace/cilium-monitoring created
serviceaccount/prometheus-k8s created
configmap/grafana-config created
configmap/grafana-cilium-dashboard created
configmap/grafana-cilium-operator-dashboard created
configmap/grafana-hubble-dashboard created
configmap/prometheus created
clusterrole.rbac.authorization.k8s.io/prometheus created
clusterrolebinding.rbac.authorization.k8s.io/prometheus created
service/grafana created
service/prometheus created
deployment.apps/grafana created
deployment.apps/prometheus created
[root@k8s-master01 yaml]#
9.2.5 修改为NodePort
安装时候没有创建 监控可以忽略
[root@k8s-master01 yaml]# kubectl edit svc -n kube-system hubble-ui
service/hubble-ui edited
[root@k8s-master01 yaml]#
[root@k8s-master01 yaml]# kubectl edit svc -n cilium-monitoring grafana
service/grafana edited
[root@k8s-master01 yaml]#
[root@k8s-master01 yaml]# kubectl edit svc -n cilium-monitoring prometheus
service/prometheus edited
[root@k8s-master01 yaml]#
type: NodePort
9.2.6 查看端口
安装时候没有创建 监控可以忽略
[root@k8s-master01 yaml]# kubectl get svc -A | grep NodePort
cilium-monitoring grafana NodePort 10.111.74.3 <none> 3000:32648/TCP 74s
cilium-monitoring prometheus NodePort 10.107.240.124 <none> 9090:30495/TCP 74s
kube-system hubble-ui NodePort 10.96.185.26 <none> 80:31568/TCP 99s
9.2.7 访问
安装时候没有创建 监控可以忽略
http://192.168.1.31:32648
http://192.168.1.31:30495
http://192.168.1.31:31568
10.安装CoreDNS
10.1以下步骤只在master01操作
10.1.1修改文件
# 下载tgz包
helm repo add coredns https://coredns.github.io/helm
helm pull coredns/coredns
tar xvf coredns-*.tgz
cd coredns/
# 修改IP地址
vim values.yaml
cat values.yaml | grep clusterIP:
clusterIP: "10.96.0.10"
# 示例
---
service:
# clusterIP: ""
# clusterIPs: []
# loadBalancerIP: ""
# externalIPs: []
# externalTrafficPolicy: ""
# ipFamilyPolicy: ""
# The name of the Service
# If not set, a name is generated using the fullname template
clusterIP: "10.96.0.10"
name: ""
annotations: {}
---
# 修改为国内源
sed -i "s#registry.k8s.io/#k8s.m.daocloud.io/#g" values.yaml
# 默认参数安装
helm install coredns ./coredns/ -n kube-system
11.安装Metrics Server
11.1以下步骤只在master01操作
11.1.1安装Metrics-server
在新版的Kubernetes中系统资源的采集均使用Metrics-server，可以通过Metrics采集节点和Pod的内存、磁盘、CPU和网络的使用率
# 下载
wget https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml -O metrics-server.yaml
# 修改配置
vim metrics-server.yaml
---
# 1
- args:
- --cert-dir=/tmp
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --kubelet-use-node-status-port
- --metric-resolution=15s
- --kubelet-insecure-tls
- --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem
- --requestheader-username-headers=X-Remote-User
- --requestheader-group-headers=X-Remote-Group
- --requestheader-extra-headers-prefix=X-Remote-Extra-
# 2
volumeMounts:
- mountPath: /tmp
name: tmp-dir
- name: ca-ssl
mountPath: /etc/kubernetes/pki
# 3
volumes:
- emptyDir: {}
name: tmp-dir
- name: ca-ssl
hostPath:
path: /etc/kubernetes/pki
---
# 修改为国内源 docker源可选
sed -i "s#registry.k8s.io/#k8s.m.daocloud.io/#g" metrics-server.yaml
# 执行部署
kubectl apply -f metrics-server.yaml
11.1.2稍等片刻查看状态
kubectl top node
NAME CPU(cores) CPU(%) MEMORY(bytes) MEMORY(%)
k8s-master01 182m 2% 2059Mi 58%
k8s-master02 104m 1% 1577Mi 44%
k8s-master03 113m 1% 1516Mi 42%
k8s-node01 53m 0% 915Mi 25%
k8s-node02 66m 0% 930Mi 26%
字数限制 详见完整版 github.com/cby-chen/Ku…
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