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1.安装说明
本文章将演示CentOS 7二进制方式安装高可用k8s 1.17+，相对于其他版本，二进制安装方式并无太大区别，只需要区分每个组件版本的对应关系即可。
生产环境中，建议使用小版本大于5的Kubernetes版本，比如1.19.5以后的才可用于生产环境。
2.基本环境配置
表1-1 高可用Kubernetes集群规划
| 角色 | 机器名 | 机器配置 | ip地址 | 安装软件 |
|---|---|---|---|---|
| master1 | k8s-master01.example.local | 2C4G | 172.31.3.101 | chrony-client、docker、kube-controller-manager、kube-scheduler、kube-apiserver、kubelet、kube-proxy、kubectl |
| master2 | k8s-master02.example.local | 2C4G | 172.31.3.102 | chrony-client、docker、kube-controller-manager、kube-scheduler、kube-apiserver、kubelet、kube-proxy、kubectl |
| master3 | k8s-master03.example.local | 2C4G | 172.31.3.103 | chrony-client、docker、kube-controller-manager、kube-scheduler、kube-apiserver、kubelet、kube-proxy、kubectl |
| ha1 | k8s-ha01.example.local | 2C2G | 172.31.3.104 172.31.3.188(vip) | chrony-server、haproxy、keepalived |
| ha2 | k8s-ha02.example.local | 2C2G | 172.31.3.105 | chrony-server、haproxy、keepalived |
| harbor1 | k8s-harbor01.example.local | 2C2G | 172.31.3.106 | chrony-client、docker、docker-compose、harbor |
| harbor2 | k8s-harbor02.example.local | 2C2G | 172.31.3.107 | chrony-client、docker、docker-compose、harbor |
| etcd1 | k8s-etcd01.example.local | 2C2G | 172.31.3.108 | chrony-client、docker、etcd |
| etcd2 | k8s-etcd02.example.local | 2C2G | 172.31.3.109 | chrony-client、docker、etcd |
| etcd3 | k8s-etcd03.example.local | 2C2G | 172.31.3.110 | chrony-client、docker、etcd |
| node1 | k8s-node01.example.local | 2C4G | 172.31.3.111 | chrony-client、docker、kubelet、kube-proxy |
| node2 | k8s-node02.example.local | 2C4G | 172.31.3.112 | chrony-client、docker、kubelet、kube-proxy |
| node3 | k8s-node03.example.local | 2C4G | 172.31.3.113 | chrony-client、docker、kubelet、kube-proxy |
软件版本信息和Pod、Service网段规划：
| 配置信息 | 备注 |
|---|---|
| 支持的操作系统版本 | CentOS 7.9/stream 8、Rocky 8、Ubuntu 18.04/20.04 |
| Docker版本 | 20.10.12 |
| kubernetes版本 | 1.21.8 |
| Pod网段 | 192.168.0.0/12 |
| Service网段 | 10.96.0.0/12 |
注意：
集群安装时会涉及到三个网段：
宿主机网段：就是安装k8s的服务器
Pod网段：k8s Pod的网段，相当于容器的IP
Service网段：k8s service网段，service用于集群容器通信。
service网段会设置为10.96.0.0/12
Pod网段会设置成192.168.0.0/12
宿主机网段可能是172.31.0.0/21
需要注意的是这三个网段不能有任何交叉。
比如如果宿主机的IP是10.105.0.x
那么service网段就不能是10.96.0.0/12，因为10.96.0.0/12网段可用IP是：
10.96.0.1 ~ 10.111.255.255
所以10.105是在这个范围之内的，属于网络交叉，此时service网段需要更换，
可以更改为192.168.0.0/16网段（注意如果service网段是192.168开头的子网掩码最好不要是12，最好为16，因为子网掩码是12他的起始IP为192.160.0.1 不是192.168.0.1）。
同样的道理，技术别的网段也不能重复。可以通过tools.jb51.net/aideddesign…
所以一般的推荐是，直接第一个开头的就不要重复，比如你的宿主机是192开头的，那么你的service可以是10.96.0.0/12.
如果你的宿主机是10开头的，就直接把service的网段改成192.168.0.0/16
如果你的宿主机是172开头的，就直接把pod网段改成192.168.0.0/12
注意搭配，均为10网段、172网段、192网段的搭配，第一个开头数字不一样就免去了网段冲突的可能性，也可以减去计算的步骤。
主机信息，服务器IP地址不能设置成dhcp，要配置成静态IP。
VIP（虚拟IP）不要和公司内网IP重复，首先去ping一下，不通才可用。VIP需要和主机在同一个局域网内！公有云的话，VIP为公有云的负载均衡的IP，比如阿里云的SLB地址，腾讯云的ELB地址，注意公有云的负载均衡都是内网的负载均衡。
各节点设置主机名：
hostnamectl set-hostname k8s-master01.example.local
hostnamectl set-hostname k8s-master02.example.local
hostnamectl set-hostname k8s-master03.example.local
hostnamectl set-hostname k8s-ha01.example.local
hostnamectl set-hostname k8s-ha02.example.local
hostnamectl set-hostname k8s-harbot01.example.local
hostnamectl set-hostname k8s-harbor02.example.local
hostnamectl set-hostname k8s-etcd01.example.local
hostnamectl set-hostname k8s-etcd02.example.local
hostnamectl set-hostname k8s-etcd03.example.local
hostnamectl set-hostname k8s-node01.example.local
hostnamectl set-hostname k8s-node02.example.local
hostnamectl set-hostname k8s-node03.example.local
各节点设置ip地址格式如下：
#CentOS
[root@k8s-master01 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
NAME=eth0
BOOTPROTO=none
ONBOOT=yes
IPADDR=172.31.3.101
PREFIX=21
GATEWAY=172.31.0.2
DNS1=223.5.5.5
DNS2=180.76.76.76
#Ubuntu
root@k8s-master01:~# cat /etc/netplan/01-netcfg.yaml
network:
version: 2
renderer: networkd
ethernets:
eth0:
addresses: [172.31.3.101/21]
gateway4: 172.31.0.2
nameservers:
addresses: [223.5.5.5, 180.76.76.76]
所有节点配置hosts，修改/etc/hosts如下：
cat >> /etc/hosts <<EOF
172.31.3.101 k8s-master01.example.local k8s-master01
172.31.3.102 k8s-master02.example.local k8s-master02
172.31.3.103 k8s-master03.example.local k8s-master03
172.31.3.104 k8s-ha01.example.local k8s-ha01
172.31.3.105 k8s-ha02.example.local k8s-ha02
172.31.3.106 k8s-harbor01.example.local k8s-harbor01
172.31.3.107 k8s-harbor02.example.local k8s-harbor02
172.31.3.108 k8s-etcd01.example.local k8s-etcd01
172.31.3.109 k8s-etcd02.example.local k8s-etcd02
172.31.3.110 k8s-etcd03.example.local k8s-etcd03
172.31.3.111 k8s-node01.example.local k8s-node01
172.31.3.112 k8s-node02.example.local k8s-node02
172.31.3.113 k8s-node03.example.local k8s-node03
172.31.3.188 k8s-lb
172.31.3.188 harbor.raymonds.cc
EOF
CentOS 7所有节点配置 yum源如下：
[root@k8s-master01 ~]# rm -f /etc/yum.repos.d/*.repo
[root@k8s-master01 ~]# cat > /etc/yum.repos.d/base.repo <<EOF
[base]
name=base
baseurl=https://mirrors.cloud.tencent.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-$releasever
[extras]
name=extras
baseurl=https://mirrors.cloud.tencent.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-$releasever
[updates]
name=updates
baseurl=https://mirrors.cloud.tencent.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-$releasever
[centosplus]
name=centosplus
baseurl=https://mirrors.cloud.tencent.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-$releasever
[epel]
name=epel
baseurl=https://mirrors.cloud.tencent.com/epel/$releasever/$basearch/
gpgcheck=1
gpgkey=https://mirrors.cloud.tencent.com/epel/RPM-GPG-KEY-EPEL-$releasever
EOF
Rocky 8所有节点配置 yum源如下：
[root@k8s-master01 ~]# cat /etc/yum.repos.d/base.repo
[BaseOS]
name=BaseOS
baseurl=https://mirrors.sjtug.sjtu.edu.cn/rocky/$releasever/BaseOS/$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
[AppStream]
name=AppStream
baseurl=https://mirrors.sjtug.sjtu.edu.cn/rocky/$releasever/AppStream/$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
[extras]
name=extras
baseurl=https://mirrors.sjtug.sjtu.edu.cn/rocky/$releasever/extras/$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
enabled=1
[plus]
name=plus
baseurl=https://mirrors.sjtug.sjtu.edu.cn/rocky/$releasever/plus/$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
[PowerTools]
name=PowerTools
baseurl=https://mirrors.sjtug.sjtu.edu.cn/rocky/$releasever/PowerTools/$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
CentOS stream 8所有节点配置 yum源如下：
[root@centos8-stream ~]# cat /etc/yum.repos.d/base.repo
[BaseOS]
name=BaseOS
baseurl=https://mirrors.cloud.tencent.com/centos/$releasever-stream/BaseOS/$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[AppStream]
name=AppStream
baseurl=https://mirrors.cloud.tencent.com/centos/$releasever-stream/AppStream/$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[extras]
name=extras
baseurl=https://mirrors.cloud.tencent.com/centos/$releasever-stream/extras/$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[centosplus]
name=centosplus
baseurl=https://mirrors.cloud.tencent.com/centos/$releasever-stream/centosplus/$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[PowerTools]
name=PowerTools
baseurl=https://mirrors.cloud.tencent.com/centos/$releasever-stream/PowerTools/$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
Ubuntu 所有节点配置 apt源如下：
root@k8s-master01:~# cat > /etc/apt/sources.list <<EOF
deb http://mirrors.cloud.tencent.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ bionic-backports main restricted universe multiverse
EOF
必备工具安装:
#CentOS安装
yum -y install vim tree lrzsz wget jq psmisc net-tools telnet yum-utils device-mapper-persistent-data lvm2 git
#Ubuntu安装
apt -y install tree lrzsz jq
所有节点关闭防火墙、selinux、swap。服务器配置如下：
#CentOS
systemctl disable --now firewalld
#CentOS 7
systemctl disable --now NetworkManager
#Ubuntu
systemctl disable --now ufw
setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
关闭swap分区
sed -ri 's/.*swap.*/#&/' /etc/fstab
swapoff -a
#Ubuntu 20.04，执行下面命令
sed -ri 's/.*swap.*/#&/' /etc/fstab
SD_NAME=`lsblk|awk -F"[ └─]" '/SWAP/{printf $3}'`
systemctl mask dev-${SD_NAME}.swap
swapoff -a
ha01和ha02上安装chrony-server:
[root@k8s-ha01 ~]# cat install_chrony_server.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-11-22
#FileName: install_chrony_server.sh
#URL: raymond.blog.csdn.net
#Description: install_chrony_server for CentOS 7/8 & Ubuntu 18.04/20.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
COLOR="echo -e \\033[01;31m"
END='\033[0m'
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' /etc/os-release`
}
install_chrony(){
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;then
yum -y install chrony &> /dev/null
sed -i -e '/^pool.*/d' -e '/^server.*/d' -e '/^# Please consider .*/a\server ntp.aliyun.com iburst\nserver time1.cloud.tencent.com iburst\nserver ntp.tuna.tsinghua.edu.cn iburst' -e 's@^#allow.*@allow 0.0.0.0/0@' -e 's@^#local.*@local stratum 10@' /etc/chrony.conf
systemctl enable --now chronyd &> /dev/null
systemctl is-active chronyd &> /dev/null || { ${COLOR}"chrony 启动失败,退出!"${END} ; exit; }
${COLOR}"chrony安装完成"${END}
else
apt -y install chrony &> /dev/null
sed -i -e '/^pool.*/d' -e '/^# See http:.*/a\server ntp.aliyun.com iburst\nserver time1.cloud.tencent.com iburst\nserver ntp.tuna.tsinghua.edu.cn iburst' /etc/chrony/chrony.conf
echo "allow 0.0.0.0/0" >> /etc/chrony/chrony.conf
echo "local stratum 10" >> /etc/chrony/chrony.conf
systemctl enable --now chronyd &> /dev/null
systemctl is-active chronyd &> /dev/null || { ${COLOR}"chrony 启动失败,退出!"${END} ; exit; }
${COLOR}"chrony安装完成"${END}
fi
}
main(){
os
install_chrony
}
main
[root@k8s-ha01 ~]# bash install_chrony_server.sh
chrony安装完成
[root@k8s-ha02 ~]# bash install_chrony_server.sh
chrony安装完成
[root@k8s-ha01 ~]# chronyc sources -nv
210 Number of sources = 3
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* 203.107.6.88 2 6 17 39 -1507us[-8009us] +/- 37ms
^- 139.199.215.251 2 6 17 39 +10ms[ +10ms] +/- 48ms
^? 101.6.6.172 0 7 0 - +0ns[ +0ns] +/- 0ns
[root@k8s-ha02 ~]# chronyc sources -nv
210 Number of sources = 3
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* 203.107.6.88 2 6 17 40 +90us[-1017ms] +/- 32ms
^+ 139.199.215.251 2 6 33 37 +13ms[ +13ms] +/- 25ms
^? 101.6.6.172 0 7 0 - +0ns[ +0ns] +/- 0ns
master、node、harbor上安装chrony-client:
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-11-22
#FileName: install_chrony_client.sh
#URL: raymond.blog.csdn.net
#Description: install_chrony_client for CentOS 7/8 & Ubuntu 18.04/20.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
COLOR="echo -e \\033[01;31m"
END='\033[0m'
SERVER1=172.31.3.104
SERVER2=172.31.3.105
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' /etc/os-release`
}
install_chrony(){
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;then
yum -y install chrony &> /dev/null
sed -i -e '/^pool.*/d' -e '/^server.*/d' -e '/^# Please consider .*/a\server '${SERVER1}' iburst\nserver '${SERVER2}' iburst' /etc/chrony.conf
systemctl enable --now chronyd &> /dev/null
systemctl is-active chronyd &> /dev/null || { ${COLOR}"chrony 启动失败,退出!"${END} ; exit; }
${COLOR}"chrony安装完成"${END}
else
apt -y install chrony &> /dev/null
sed -i -e '/^pool.*/d' -e '/^# See http:.*/a\server '${SERVER1}' iburst\nserver '${SERVER2}' iburst' /etc/chrony/chrony.conf
systemctl enable --now chronyd &> /dev/null
systemctl is-active chronyd &> /dev/null || { ${COLOR}"chrony 启动失败,退出!"${END} ; exit; }
systemctl restart chronyd
${COLOR}"chrony安装完成"${END}
fi
}
main(){
os
install_chrony
}
main
[root@k8s-master01 ~]# cat install_chrony_client.sh
#!/bin/bash
COLOR="echo -e \\033[01;31m"
END='\033[0m'
SERVER1=172.31.3.104
SERVER2=172.31.3.105
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' /etc/os-release`
}
install_chrony(){
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;then
yum -y install chrony &> /dev/null
sed -i -e '/^pool.*/d' -e '/^server.*/d' -e '/^# Please consider .*/a\server '${SERVER1}' iburst\nserver '${SERVER2}' iburst' /etc/chrony.conf
systemctl enable --now chronyd &> /dev/null
systemctl is-active chronyd &> /dev/null || { ${COLOR}"chrony 启动失败,退出!"${END} ; exit; }
${COLOR}"chrony安装完成"${END}
else
apt -y install chrony &> /dev/null
sed -i -e '/^pool.*/d' -e '/^# See http:.*/a\server '${SERVER1}' iburst\nserver '${SERVER2}' iburst' /etc/chrony/chrony.conf
systemctl enable --now chronyd &> /dev/null
systemctl is-active chronyd &> /dev/null || { ${COLOR}"chrony 启动失败,退出!"${END} ; exit; }
systemctl restart chronyd
${COLOR}"chrony安装完成"${END}
fi
}
main(){
os
install_chrony
}
main
[root@k8s-master01 ~]# for i in k8s-master02 k8s-master03 k8s-harbor01 k8s-harbor02 k8s-node01 k8s-node02 k8s-node03;do scp install_chrony_client.sh $i:/root/ ; done
[root@k8s-master01 ~]# bash install_chrony_client.sh
chrony安装完成
[root@k8s-master01 ~]# chronyc sources -nv
210 Number of sources = 2
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^+ k8s-ha01 3 6 17 8 +84us[ +74us] +/- 55ms
^* k8s-ha02 3 6 17 8 -82us[ -91us] +/- 45ms
所有节点设置时区。时间同步配置如下：
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo 'Asia/Shanghai' >/etc/timezone
所有节点配置limit：
ulimit -SHn 65535
cat >>/etc/security/limits.conf <<EOF
* soft nofile 65536
* hard nofile 131072
* soft nproc 65535
* hard nproc 655350
* soft memlock unlimited
* hard memlock unlimited
EOF
Master01节点免密钥登录其他节点，安装过程中生成配置文件和证书均在Master01上操作，集群管理也在Master01上操作，阿里云或者AWS上需要单独一台kubectl服务器。密钥配置如下：
[root@k8s-master01 ~]# cat ssh_key.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-12-20
#FileName: ssh_key.sh
#URL: raymond.blog.csdn.net
#Description: ssh_key for CentOS 7/8 & Ubuntu 18.04/24.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
COLOR="echo -e \\033[01;31m"
END='\033[0m'
NET_NAME=`ip addr |awk -F"[: ]" '/^2: e.*/{print $3}'`
IP=`ip addr show ${NET_NAME}| awk -F" +|/" '/global/{print $3}'`
export SSHPASS=123456
HOSTS="
172.31.3.102
172.31.3.103
172.31.3.104
172.31.3.105
172.31.3.106
172.31.3.107
172.31.3.108
172.31.3.109
172.31.3.110
172.31.3.111
172.31.3.112
172.31.3.113"
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' /etc/os-release`
}
ssh_key_push(){
rm -f ~/.ssh/id_rsa*
ssh-keygen -f /root/.ssh/id_rsa -P '' &> /dev/null
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;then
rpm -q sshpass &> /dev/null || { ${COLOR}"安装sshpass软件包"${END};yum -y install sshpass &> /dev/null; }
else
dpkg -S sshpass &> /dev/null || { ${COLOR}"安装sshpass软件包"${END};apt -y install sshpass &> /dev/null; }
fi
sshpass -e ssh-copy-id -o StrictHostKeyChecking=no ${IP} &> /dev/null
[ $? -eq 0 ] && echo ${IP} is finished || echo ${IP} is false
for i in ${HOSTS};do
sshpass -e scp -o StrictHostKeyChecking=no -r /root/.ssh root@${i}: &> /dev/null
[ $? -eq 0 ] && echo ${i} is finished || echo ${i} is false
done
for i in ${HOSTS};do
scp /root/.ssh/known_hosts ${i}:.ssh/ &> /dev/null
[ $? -eq 0 ] && echo ${i} is finished || echo ${i} is false
done
}
main(){
os
ssh_key_push
}
main
[root@k8s-master01 ~]# bash ssh_key.sh
安装sshpass软件包
172.31.3.101 is finished
172.31.3.102 is finished
172.31.3.103 is finished
172.31.3.104 is finished
172.31.3.105 is finished
172.31.3.106 is finished
172.31.3.107 is finished
172.31.3.108 is finished
172.31.3.109 is finished
172.31.3.110 is finished
172.31.3.111 is finished
172.31.3.112 is finished
172.31.3.113 is finished
172.31.3.102 is finished
172.31.3.103 is finished
172.31.3.104 is finished
172.31.3.105 is finished
172.31.3.106 is finished
172.31.3.107 is finished
172.31.3.108 is finished
172.31.3.109 is finished
172.31.3.110 is finished
172.31.3.111 is finished
172.31.3.112 is finished
172.31.3.113 is finished
所有节点升级系统并重启，此处升级没有升级内核，下节会单独升级内核：
yum update -y --exclude=kernel* && reboot #CentOS7需要升级，CentOS8可以按需升级系统
[root@k8s-master01 ~]# cat /etc/redhat-release
CentOS Linux release 7.9.2009 (Core)
3.内核配置
CentOS7 需要升级内核至4.18+，本地升级的版本为4.19
在master01节点下载内核：
[root@k8s-master01 ~]# wget http://193.49.22.109/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-devel-4.19.12-1.el7.elrepo.x86_64.rpm
[root@k8s-master01 ~]# wget http://193.49.22.109/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-4.19.12-1.el7.elrepo.x86_64.rpm
从master01节点传到其他节点：
[root@k8s-master01 ~]# for i in k8s-master02 k8s-master03 k8s-node01 k8s-node02;do scp kernel-ml-4.19.12-1.el7.elrepo.x86_64.rpm kernel-ml-devel-4.19.12-1.el7.elrepo.x86_64.rpm $i:/root/ ; done
所有节点安装内核
cd /root && yum localinstall -y kernel-ml*
所有节点更改内核启动顺序
grub2-set-default 0 && grub2-mkconfig -o /etc/grub2.cfg
grubby --args="user_namespace.enable=1" --update-kernel="$(grubby --default-kernel)"
检查默认内核是不是4.19
grubby --default-kernel
[root@k8s-master01 ~]# grubby --default-kernel
/boot/vmlinuz-4.19.12-1.el7.elrepo.x86_64
所有节点重启，然后检查内核是不是4.19
reboot
uname -a
[root@k8s-master01 ~]# uname -a
Linux k8s-master01 4.19.12-1.el7.elrepo.x86_64 #1 SMP Fri Dec 21 11:06:36 EST 2018 x86_64 x86_64 x86_64 GNU/Linux
master和node安装ipvsadm：
#CentOS
yum -y install ipvsadm ipset sysstat conntrack libseccomp
#Ubuntu
apt -y install ipvsadm ipset sysstat conntrack libseccomp-dev
所有节点配置ipvs模块，在内核4.19+版本nf_conntrack_ipv4已经改为nf_conntrack， 4.18以下使用nf_conntrack_ipv4即可：
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack #内核小于4.18，把这行改成nf_conntrack_ipv4
cat >> /etc/modules-load.d/ipvs.conf <<EOF
ip_vs
ip_vs_lc
ip_vs_wlc
ip_vs_rr
ip_vs_wrr
ip_vs_lblc
ip_vs_lblcr
ip_vs_dh
ip_vs_sh
ip_vs_fo
ip_vs_nq
ip_vs_sed
ip_vs_ftp
ip_vs_sh
nf_conntrack #内核小于4.18，把这行改成nf_conntrack_ipv4
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOF
然后执行systemctl enable --now systemd-modules-load.service即可
开启一些k8s集群中必须的内核参数，所有节点配置k8s内核：
cat > /etc/sysctl.d/k8s.conf <<EOF
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 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
EOF
sysctl --system
Kubernetes内核优化常用参数详解：
net.ipv4.ip_forward = 1 #其值为0,说明禁止进行IP转发；如果是1,则说明IP转发功能已经打开。
net.bridge.bridge-nf-call-iptables = 1 #二层的网桥在转发包时也会被iptables的FORWARD规则所过滤，这样有时会出现L3层的iptables rules去过滤L2的帧的问题
net.bridge.bridge-nf-call-ip6tables = 1 #是否在ip6tables链中过滤IPv6包
fs.may_detach_mounts = 1 #当系统有容器运行时，需要设置为1
vm.overcommit_memory=1
#0， 表示内核将检查是否有足够的可用内存供应用进程使用；如果有足够的可用内存，内存申请允许；否则，内存申请失败，并把错误返回给应用进程。
#1， 表示内核允许分配所有的物理内存，而不管当前的内存状态如何。
#2， 表示内核允许分配超过所有物理内存和交换空间总和的内存
vm.panic_on_oom=0
#OOM就是out of memory的缩写，遇到内存耗尽、无法分配的状况。kernel面对OOM的时候，咱们也不能慌乱，要根据OOM参数来进行相应的处理。
#值为0：内存不足时，启动 OOM killer。
#值为1：内存不足时，有可能会触发 kernel panic（系统重启），也有可能启动 OOM killer。
#值为2：内存不足时，表示强制触发 kernel panic，内核崩溃GG（系统重启）。
fs.inotify.max_user_watches=89100 #表示同一用户同时可以添加的watch数目（watch一般是针对目录，决定了同时同一用户可以监控的目录数量）
fs.file-max=52706963 #所有进程最大的文件数
fs.nr_open=52706963 #单个进程可分配的最大文件数
net.netfilter.nf_conntrack_max=2310720 #连接跟踪表的大小，建议根据内存计算该值CONNTRACK_MAX = RAMSIZE (in bytes) / 16384 / (x / 32)，并满足nf_conntrack_max=4*nf_conntrack_buckets，默认262144
net.ipv4.tcp_keepalive_time = 600 #KeepAlive的空闲时长，或者说每次正常发送心跳的周期，默认值为7200s（2小时）
net.ipv4.tcp_keepalive_probes = 3 #在tcp_keepalive_time之后，没有接收到对方确认，继续发送保活探测包次数，默认值为9（次）
net.ipv4.tcp_keepalive_intvl =15 #KeepAlive探测包的发送间隔，默认值为75s
net.ipv4.tcp_max_tw_buckets = 36000 #Nginx 之类的中间代理一定要关注这个值，因为它对你的系统起到一个保护的作用，一旦端口全部被占用，服务就异常了。 tcp_max_tw_buckets 能帮你降低这种情况的发生概率，争取补救时间。
net.ipv4.tcp_tw_reuse = 1 #只对客户端起作用，开启后客户端在1s内回收
net.ipv4.tcp_max_orphans = 327680 #这个值表示系统所能处理不属于任何进程的socket数量，当我们需要快速建立大量连接时，就需要关注下这个值了。
net.ipv4.tcp_orphan_retries = 3
#出现大量fin-wait-1
#首先，fin发送之后，有可能会丢弃，那么发送多少次这样的fin包呢？fin包的重传，也会采用退避方式，在2.6.358内核中采用的是指数退避，2s，4s，最后的重试次数是由tcp_orphan_retries来限制的。
net.ipv4.tcp_syncookies = 1 #tcp_syncookies是一个开关，是否打开SYN Cookie功能，该功能可以防止部分SYN攻击。tcp_synack_retries和tcp_syn_retries定义SYN的重试次数。
net.ipv4.tcp_max_syn_backlog = 16384 #进入SYN包的最大请求队列.默认1024.对重负载服务器,增加该值显然有好处.
net.ipv4.ip_conntrack_max = 65536 #表明系统将对最大跟踪的TCP连接数限制默认为65536
net.ipv4.tcp_max_syn_backlog = 16384 #指定所能接受SYN同步包的最大客户端数量，即半连接上限；
net.ipv4.tcp_timestamps = 0 #在使用 iptables 做 nat 时，发现内网机器 ping 某个域名 ping 的通，而使用 curl 测试不通, 原来是 net.ipv4.tcp_timestamps 设置了为 1 ，即启用时间戳
net.core.somaxconn = 16384 #Linux中的一个kernel参数，表示socket监听（listen）的backlog上限。什么是backlog呢？backlog就是socket的监听队列，当一个请求（request）尚未被处理或建立时，他会进入backlog。而socket server可以一次性处理backlog中的所有请求，处理后的请求不再位于监听队列中。当server处理请求较慢，以至于监听队列被填满后，新来的请求会被拒绝。
所有节点配置完内核后，重启服务器，保证重启后内核依旧加载
reboot
lsmod | grep --color=auto -e ip_vs -e nf_conntrack
[root@k8s-master01 ~]# lsmod | grep --color=auto -e ip_vs -e nf_conntrack
ip_vs_ftp 16384 0
nf_nat 32768 1 ip_vs_ftp
ip_vs_sed 16384 0
ip_vs_nq 16384 0
ip_vs_fo 16384 0
ip_vs_sh 16384 0
ip_vs_dh 16384 0
ip_vs_lblcr 16384 0
ip_vs_lblc 16384 0
ip_vs_wrr 16384 0
ip_vs_rr 16384 0
ip_vs_wlc 16384 0
ip_vs_lc 16384 0
ip_vs 151552 24 ip_vs_wlc,ip_vs_rr,ip_vs_dh,ip_vs_lblcr,ip_vs_sh,ip_vs_fo,ip_vs_nq,ip_vs_lblc,ip_vs_wrr,ip_vs_lc,ip_vs_sed,ip_vs_ftp
nf_conntrack 143360 2 nf_nat,ip_vs
nf_defrag_ipv6 20480 1 nf_conntrack
nf_defrag_ipv4 16384 1 nf_conntrack
libcrc32c 16384 4 nf_conntrack,nf_nat,xfs,ip_vs
4.高可用组件安装
（注意：如果不是高可用集群，haproxy和keepalived无需安装）
公有云要用公有云自带的负载均衡，比如阿里云的SLB，腾讯云的ELB，用来替代haproxy和keepalived，因为公有云大部分都是不支持keepalived的，另外如果用阿里云的话，kubectl控制端不能放在master节点，推荐使用腾讯云，因为阿里云的slb有回环的问题，也就是slb代理的服务器不能反向访问SLB，但是腾讯云修复了这个问题。
阿里云需要设置：slb -> haproxy -> apiserver
4.1 安装haproxy
在ha01和ha02安装HAProxy：
[root@k8s-ha01 ~]# cat install_haproxy.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-12-29
#FileName: install_haproxy.sh
#URL: raymond.blog.csdn.net
#Description: The test script
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
SRC_DIR=/usr/local/src
COLOR="echo -e \\033[01;31m"
END='\033[0m'
CPUS=`lscpu |awk '/^CPU\(s\)/{print $2}'`
#lua下载地址：http://www.lua.org/ftp/lua-5.4.3.tar.gz
LUA_FILE=lua-5.4.3.tar.gz
#haproxy下载地址：https://www.haproxy.org/download/2.4/src/haproxy-2.4.10.tar.gz
HAPROXY_FILE=haproxy-2.4.10.tar.gz
HAPROXY_INSTALL_DIR=/apps/haproxy
STATS_AUTH_USER=admin
STATS_AUTH_PASSWORD=123456
VIP=172.31.3.188
MASTER01=172.31.3.101
MASTER02=172.31.3.102
MASTER03=172.31.3.103
HARBOR01=172.31.3.106
HARBOR02=172.31.3.107
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' /etc/os-release`
}
check_file (){
cd ${SRC_DIR}
${COLOR}'检查Haproxy相关源码包'${END}
if [ ! -e ${LUA_FILE} ];then
${COLOR}"缺少${LUA_FILE}文件,请把文件放到${SRC_DIR}目录下"${END}
exit
elif [ ! -e ${HAPROXY_FILE} ];then
${COLOR}"缺少${HAPROXY_FILE}文件,请把文件放到${SRC_DIR}目录下"${END}
exit
else
${COLOR}"相关文件已准备好"${END}
fi
}
install_haproxy(){
[ -d ${HAPROXY_INSTALL_DIR} ] && { ${COLOR}"Haproxy已存在，安装失败"${END};exit; }
${COLOR}"开始安装Haproxy"${END}
${COLOR}"开始安装Haproxy依赖包"${END}
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;then
yum -y install gcc make gcc-c++ glibc glibc-devel pcre pcre-devel openssl openssl-devel systemd-devel libtermcap-devel ncurses-devel libevent-devel readline-devel &> /dev/null
else
apt update &> /dev/null;apt -y install gcc make openssl libssl-dev libpcre3 libpcre3-dev zlib1g-dev libreadline-dev libsystemd-dev &> /dev/null
fi
tar xf ${LUA_FILE}
LUA_DIR=`echo ${LUA_FILE} | sed -nr 's/^(.*[0-9]).([[:lower:]]).*/\1/p'`
cd ${LUA_DIR}
make all test
cd ${SRC_DIR}
tar xf ${HAPROXY_FILE}
HAPROXY_DIR=`echo ${HAPROXY_FILE} | sed -nr 's/^(.*[0-9]).([[:lower:]]).*/\1/p'`
cd ${HAPROXY_DIR}
make -j ${CPUS} ARCH=x86_64 TARGET=linux-glibc USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 USE_SYSTEMD=1 USE_CPU_AFFINITY=1 USE_LUA=1 LUA_INC=${SRC_DIR}/${LUA_DIR}/src/ LUA_LIB=${SRC_DIR}/${LUA_DIR}/src/ PREFIX=${HAPROXY_INSTALL_DIR}
make install PREFIX=${HAPROXY_INSTALL_DIR}
[ $? -eq 0 ] && $COLOR"Haproxy编译安装成功"$END || { $COLOR"Haproxy编译安装失败,退出!"$END;exit; }
cat > /lib/systemd/system/haproxy.service <<-EOF
[Unit]
Description=HAProxy Load Balancer
After=syslog.target network.target
[Service]
ExecStartPre=/usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -c -q
ExecStart=/usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /var/lib/haproxy/haproxy.pid
ExecReload=/bin/kill -USR2 $MAINPID
[Install]
WantedBy=multi-user.target
EOF
[ -L /usr/sbin/haproxy ] || ln -s ../..${HAPROXY_INSTALL_DIR}/sbin/haproxy /usr/sbin/ &> /dev/null
[ -d /etc/haproxy ] || mkdir /etc/haproxy &> /dev/null
[ -d /var/lib/haproxy/ ] || mkdir -p /var/lib/haproxy/ &> /dev/null
cat > /etc/haproxy/haproxy.cfg <<-EOF
global
maxconn 100000
chroot ${HAPROXY_INSTALL_DIR}
stats socket /var/lib/haproxy/haproxy.sock mode 600 level admin
uid 99
gid 99
daemon
pidfile /var/lib/haproxy/haproxy.pid
log 127.0.0.1 local3 info
defaults
option http-keep-alive
option forwardfor
maxconn 100000
mode http
timeout connect 300000ms
timeout client 300000ms
timeout server 300000ms
listen stats
mode http
bind 0.0.0.0:9999
stats enable
log global
stats uri /haproxy-status
stats auth ${STATS_AUTH_USER}:${STATS_AUTH_PASSWORD}
listen kubernetes-6443
bind ${VIP}:6443
mode tcp
log global
server ${MASTER01} ${MASTER01}:6443 check inter 3s fall 2 rise 5
server ${MASTER02} ${MASTER02}:6443 check inter 3s fall 2 rise 5
server ${MASTER03} ${MASTER03}:6443 check inter 3s fall 2 rise 5
listen harbor-80
bind ${VIP}:80
mode http
log global
balance source
server ${HARBOR01} ${HARBOR01}:80 check inter 3s fall 2 rise 5
server ${HARBOR02} ${HARBOR02}:80 check inter 3s fall 2 rise 5
EOF
cat >> /etc/sysctl.conf <<-EOF
net.ipv4.ip_nonlocal_bind = 1
EOF
sysctl -p &> /dev/null
echo "PATH=${HAPROXY_INSTALL_DIR}/sbin:${PATH}" > /etc/profile.d/haproxy.sh
systemctl daemon-reload
systemctl enable --now haproxy &> /dev/null
systemctl is-active haproxy &> /dev/null && ${COLOR}"Haproxy 服务启动成功!"${END} || { ${COLOR}"Haproxy 启动失败,退出!"${END} ; exit; }
${COLOR}"Haproxy安装完成"${END}
}
main(){
os
check_file
install_haproxy
}
main
[root@k8s-ha01 ~]# bash install_haproxy.sh
[root@k8s-ha02 ~]# bash install_haproxy.sh
4.2 安装keepalived
所有master节点配置KeepAlived健康检查文件：
[root@k8s-ha02 ~]# cat check_haproxy.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2022-01-09
#FileName: check_haproxy.sh
#URL: raymond.blog.csdn.net
#Description: The test script
#Copyright (C): 2022 All rights reserved
#*********************************************************************************************
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
在ha01和ha02节点安装KeepAlived，配置不一样，注意区分 [root@k8s-master01 pki]# vim /etc/keepalived/keepalived.conf ，注意每个节点的网卡（interface参数）
在ha01节点上安装keepalived-master：
[root@k8s-ha01 ~]# cat install_keepalived_master.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-12-29
#FileName: install_keepalived_master.sh
#URL: raymond.blog.csdn.net
#Description: install_keepalived for CentOS 7/8 & Ubuntu 18.04/20.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
SRC_DIR=/usr/local/src
COLOR="echo -e \\033[01;31m"
END='\033[0m'
KEEPALIVED_URL=https://keepalived.org/software/
KEEPALIVED_FILE=keepalived-2.2.4.tar.gz
KEEPALIVED_INSTALL_DIR=/apps/keepalived
CPUS=`lscpu |awk '/^CPU\(s\)/{print $2}'`
NET_NAME=`ip addr |awk -F"[: ]" '/^2: e.*/{print $3}'`
STATE=MASTER
PRIORITY=100
VIP=172.31.3.188
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' /etc/os-release`
OS_RELEASE_VERSION=`sed -rn '/^VERSION_ID=/s@.*="?([0-9]+)\.?.*"?@\1@p' /etc/os-release`
}
check_file (){
cd ${SRC_DIR}
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;then
rpm -q wget &> /dev/null || yum -y install wget &> /dev/null
fi
if [ ! -e ${KEEPALIVED_FILE} ];then
${COLOR}"缺少${KEEPALIVED_FILE}文件,如果是离线包,请放到${SRC_DIR}目录下"${END}
${COLOR}'开始下载Keepalived源码包'${END}
wget ${KEEPALIVED_URL}${KEEPALIVED_FILE} || { ${COLOR}"Keepalived源码包下载失败"${END}; exit; }
elif [ ! -e check_haproxy.sh ];then
${COLOR}"缺少check_haproxy.sh文件,请把文件放到${SRC_DIR}目录下"${END}
exit
else
${COLOR}"相关文件已准备好"${END}
fi
}
install_keepalived(){
[ -d ${KEEPALIVED_INSTALL_DIR} ] && { ${COLOR}"Keepalived已存在，安装失败"${END};exit; }
${COLOR}"开始安装Keepalived"${END}
${COLOR}"开始安装Keepalived依赖包"${END}
if [ ${OS_ID} == "Rocky" -a ${OS_RELEASE_VERSION} == 8 ];then
URL=mirrors.sjtug.sjtu.edu.cn
if [ ! `grep -R "\[PowerTools\]" /etc/yum.repos.d/` ];then
cat > /etc/yum.repos.d/PowerTools.repo <<-EOF
[PowerTools]
name=PowerTools
baseurl=https://${URL}/rocky/\$releasever/PowerTools/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
EOF
fi
fi
if [ ${OS_ID} == "CentOS" -a ${OS_RELEASE_VERSION} == 8 ];then
URL=mirrors.cloud.tencent.com
if [ ! `grep -R "\[PowerTools\]" /etc/yum.repos.d/` ];then
cat > /etc/yum.repos.d/PowerTools.repo <<-EOF
[PowerTools]
name=PowerTools
baseurl=https://${URL}/centos/\$releasever/PowerTools/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
EOF
fi
fi
if [[ ${OS_RELEASE_VERSION} == 8 ]] &> /dev/null;then
yum -y install make gcc ipvsadm autoconf automake openssl-devel libnl3-devel iptables-devel ipset-devel file-devel net-snmp-devel glib2-devel pcre2-devel libnftnl-devel libmnl-devel systemd-devel &> /dev/null
elif [[ ${OS_RELEASE_VERSION} == 7 ]] &> /dev/null;then
yum -y install make gcc libnfnetlink-devel libnfnetlink ipvsadm libnl libnl-devel libnl3 libnl3-devel lm_sensors-libs net-snmp-agent-libs net-snmp-libs openssh-server openssh-clients openssl openssl-devel automake iproute &> /dev/null
elif [[ ${OS_RELEASE_VERSION} == 20 ]] &> /dev/null;then
apt update &> /dev/null;apt -y install make gcc ipvsadm build-essential pkg-config automake autoconf libipset-dev libnl-3-dev libnl-genl-3-dev libssl-dev libxtables-dev libip4tc-dev libip6tc-dev libipset-dev libmagic-dev libsnmp-dev libglib2.0-dev libpcre2-dev libnftnl-dev libmnl-dev libsystemd-dev
else
apt update &> /dev/null;apt -y install make gcc ipvsadm build-essential pkg-config automake autoconf iptables-dev libipset-dev libnl-3-dev libnl-genl-3-dev libssl-dev libxtables-dev libip4tc-dev libip6tc-dev libipset-dev libmagic-dev libsnmp-dev libglib2.0-dev libpcre2-dev libnftnl-dev libmnl-dev libsystemd-dev &> /dev/null
fi
tar xf ${KEEPALIVED_FILE}
KEEPALIVED_DIR=`echo ${KEEPALIVED_FILE} | sed -nr 's/^(.*[0-9]).([[:lower:]]).*/\1/p'`
cd ${KEEPALIVED_DIR}
./configure --prefix=${KEEPALIVED_INSTALL_DIR} --disable-fwmark
make -j $CPUS && make install
[ $? -eq 0 ] && ${COLOR}"Keepalived编译安装成功"${END} || { ${COLOR}"Keepalived编译安装失败,退出!"${END};exit; }
[ -d /etc/keepalived ] || mkdir -p /etc/keepalived &> /dev/null
cat > /etc/keepalived/keepalived.conf <<EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
script_user root
enable_script_security
}
vrrp_script check_haoroxy {
script "/etc/keepalived/check_haproxy.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state ${STATE}
interface ${NET_NAME}
virtual_router_id 51
priority ${PRIORITY}
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
${VIP} dev ${NET_NAME} label ${NET_NAME}:1
}
track_script {
check_haproxy
}
}
EOF
cp ./keepalived/keepalived.service /lib/systemd/system/
cd ${SRC_DIR}
mv check_haproxy.sh /etc/keepalived/check_haproxy.sh
chmod +x /etc/keepalived/check_haproxy.sh
echo "PATH=${KEEPALIVED_INSTALL_DIR}/sbin:${PATH}" > /etc/profile.d/keepalived.sh
systemctl daemon-reload
systemctl enable --now keepalived &> /dev/null
systemctl is-active keepalived &> /dev/null && ${COLOR}"Keepalived 服务启动成功!"${END} || { ${COLOR}"Keepalived 启动失败,退出!"${END} ; exit; }
${COLOR}"Keepalived安装完成"${END}
}
main(){
os
check_file
install_keepalived
}
main
[root@k8s-ha01 ~]# bash install_keepalived_master.sh
[root@k8s-ha01 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:05:9b:2a brd ff:ff:ff:ff:ff:ff
inet 172.31.3.104/21 brd 172.31.7.255 scope global eth0
valid_lft forever preferred_lft forever
inet 172.31.3.188/32 scope global eth0:1
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe05:9b2a/64 scope link
valid_lft forever preferred_lft forever
在ha02节点上安装keepalived-backup：
[root@k8s-ha02 ~]# cat install_keepalived_backup.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-12-29
#FileName: install_keepalived_backup.sh
#URL: raymond.blog.csdn.net
#Description: install_keepalived for CentOS 7/8 & Ubuntu 18.04/20.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
SRC_DIR=/usr/local/src
COLOR="echo -e \\033[01;31m"
END='\033[0m'
KEEPALIVED_URL=https://keepalived.org/software/
KEEPALIVED_FILE=keepalived-2.2.4.tar.gz
KEEPALIVED_INSTALL_DIR=/apps/keepalived
CPUS=`lscpu |awk '/^CPU\(s\)/{print $2}'`
NET_NAME=`ip addr |awk -F"[: ]" '/^2: e.*/{print $3}'`
STATE=BACKUP
PRIORITY=90
VIP=172.31.3.188
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' /etc/os-release`
OS_RELEASE_VERSION=`sed -rn '/^VERSION_ID=/s@.*="?([0-9]+)\.?.*"?@\1@p' /etc/os-release`
}
check_file (){
cd ${SRC_DIR}
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;then
rpm -q wget &> /dev/null || yum -y install wget &> /dev/null
fi
if [ ! -e ${KEEPALIVED_FILE} ];then
${COLOR}"缺少${KEEPALIVED_FILE}文件,如果是离线包,请放到${SRC_DIR}目录下"${END}
${COLOR}'开始下载Keepalived源码包'${END}
wget ${KEEPALIVED_URL}${KEEPALIVED_FILE} || { ${COLOR}"Keepalived源码包下载失败"${END}; exit; }
elif [ ! -e check_haproxy.sh ];then
${COLOR}"缺少check_haproxy.sh文件,请把文件放到${SRC_DIR}目录下"${END}
exit
else
${COLOR}"相关文件已准备好"${END}
fi
}
install_keepalived(){
[ -d ${KEEPALIVED_INSTALL_DIR} ] && { ${COLOR}"Keepalived已存在，安装失败"${END};exit; }
${COLOR}"开始安装Keepalived"${END}
${COLOR}"开始安装Keepalived依赖包"${END}
if [ ${OS_ID} == "Rocky" -a ${OS_RELEASE_VERSION} == 8 ];then
URL=mirrors.sjtug.sjtu.edu.cn
if [ ! `grep -R "\[PowerTools\]" /etc/yum.repos.d/` ];then
cat > /etc/yum.repos.d/PowerTools.repo <<-EOF
[PowerTools]
name=PowerTools
baseurl=https://${URL}/rocky/\$releasever/PowerTools/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
EOF
fi
fi
if [ ${OS_ID} == "CentOS" -a ${OS_RELEASE_VERSION} == 8 ];then
URL=mirrors.cloud.tencent.com
if [ ! `grep -R "\[PowerTools\]" /etc/yum.repos.d/` ];then
cat > /etc/yum.repos.d/PowerTools.repo <<-EOF
[PowerTools]
name=PowerTools
baseurl=https://${URL}/centos/\$releasever/PowerTools/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
EOF
fi
fi
if [[ ${OS_RELEASE_VERSION} == 8 ]] &> /dev/null;then
yum -y install make gcc ipvsadm autoconf automake openssl-devel libnl3-devel iptables-devel ipset-devel file-devel net-snmp-devel glib2-devel pcre2-devel libnftnl-devel libmnl-devel systemd-devel &> /dev/null
elif [[ ${OS_RELEASE_VERSION} == 7 ]] &> /dev/null;then
yum -y install make gcc libnfnetlink-devel libnfnetlink ipvsadm libnl libnl-devel libnl3 libnl3-devel lm_sensors-libs net-snmp-agent-libs net-snmp-libs openssh-server openssh-clients openssl openssl-devel automake iproute &> /dev/null
elif [[ ${OS_RELEASE_VERSION} == 20 ]] &> /dev/null;then
apt update &> /dev/null;apt -y install make gcc ipvsadm build-essential pkg-config automake autoconf libipset-dev libnl-3-dev libnl-genl-3-dev libssl-dev libxtables-dev libip4tc-dev libip6tc-dev libipset-dev libmagic-dev libsnmp-dev libglib2.0-dev libpcre2-dev libnftnl-dev libmnl-dev libsystemd-dev
else
apt update &> /dev/null;apt -y install make gcc ipvsadm build-essential pkg-config automake autoconf iptables-dev libipset-dev libnl-3-dev libnl-genl-3-dev libssl-dev libxtables-dev libip4tc-dev libip6tc-dev libipset-dev libmagic-dev libsnmp-dev libglib2.0-dev libpcre2-dev libnftnl-dev libmnl-dev libsystemd-dev &> /dev/null
fi
tar xf ${KEEPALIVED_FILE}
KEEPALIVED_DIR=`echo ${KEEPALIVED_FILE} | sed -nr 's/^(.*[0-9]).([[:lower:]]).*/\1/p'`
cd ${KEEPALIVED_DIR}
./configure --prefix=${KEEPALIVED_INSTALL_DIR} --disable-fwmark
make -j $CPUS && make install
[ $? -eq 0 ] && ${COLOR}"Keepalived编译安装成功"${END} || { ${COLOR}"Keepalived编译安装失败,退出!"${END};exit; }
[ -d /etc/keepalived ] || mkdir -p /etc/keepalived &> /dev/null
cat > /etc/keepalived/keepalived.conf <<EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
script_user root
enable_script_security
}
vrrp_script check_haoroxy {
script "/etc/keepalived/check_haproxy.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state ${STATE}
interface ${NET_NAME}
virtual_router_id 51
priority ${PRIORITY}
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
${VIP} dev ${NET_NAME} label ${NET_NAME}:1
}
track_script {
check_haproxy
}
}
EOF
cp ./keepalived/keepalived.service /lib/systemd/system/
cd ${SRC_DIR}
mv check_haproxy.sh /etc/keepalived/check_haproxy.sh
chmod +x /etc/keepalived/check_haproxy.sh
echo "PATH=${KEEPALIVED_INSTALL_DIR}/sbin:${PATH}" > /etc/profile.d/keepalived.sh
systemctl daemon-reload
systemctl enable --now keepalived &> /dev/null
systemctl is-active keepalived &> /dev/null && ${COLOR}"Keepalived 服务启动成功!"${END} || { ${COLOR}"Keepalived 启动失败,退出!"${END} ; exit; }
${COLOR}"Keepalived安装完成"${END}
}
main(){
os
check_file
install_keepalived
}
main
[root@k8s-ha02 ~]# bash install_keepalived_backup.sh
5.安装harbor
5.1 安装harbor
在harbor01和harbor02上安装harbor:
[root@k8s-harbor01 ~]# cat install_docker_binary_compose_harbor.sh
#!/bin/bash
#
#**************************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-12-15
#FileName: install_docker_binary_compose_harbor.sh
#URL: raymond.blog.csdn.net
#Description: install_docker_binary_compose_harbor for CentOS 7/8 & Ubuntu 18.04/20.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#**************************************************************************************************
SRC_DIR=/usr/local/src
COLOR="echo -e \\033[01;31m"
END='\033[0m'
URL='https://download.docker.com/linux/static/stable/x86_64/'
DOCKER_FILE=docker-20.10.12.tgz
#docker-compose下载地址:https://github.com/docker/compose/releases/download/1.29.2/docker-compose-Linux-x86_64
DOCKER_COMPOSE_FILE=docker-compose-linux-x86_64
#harbor下载地址:https://github.com/goharbor/harbor/releases/download/v2.4.1/harbor-offline-installer-v2.4.1.tgz
HARBOR_FILE=harbor-offline-installer-v
HARBOR_VERSION=2.4.1
TAR=.tgz
HARBOR_INSTALL_DIR=/apps
HARBOR_DOMAIN=harbor.raymonds.cc
NET_NAME=`ip addr |awk -F"[: ]" '/^2: e.*/{print $3}'`
IP=`ip addr show ${NET_NAME}| awk -F" +|/" '/global/{print $3}'`
HARBOR_ADMIN_PASSWORD=123456
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' /etc/os-release`
OS_RELEASE_VERSION=`sed -rn '/^VERSION_ID=/s@.*="?([0-9]+)\.?.*"?@\1@p' /etc/os-release`
}
check_file (){
cd ${SRC_DIR}
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;then
rpm -q wget &> /dev/null || yum -y install wget &> /dev/null
fi
if [ ! -e ${DOCKER_FILE} ];then
${COLOR}"缺少${DOCKER_FILE}文件,如果是离线包,请把文件放到${SRC_DIR}目录下"${END}
${COLOR}'开始下载DOCKER二进制源码包'${END}
wget ${URL}${DOCKER_FILE} || { ${COLOR}"DOCKER二进制安装包下载失败"${END}; exit; }
elif [ ! -e ${DOCKER_COMPOSE_FILE} ];then
${COLOR}"缺少${DOCKER_COMPOSE_FILE}文件,请把文件放到${SRC_DIR}目录下"${END}
exit
elif [ ! -e ${HARBOR_FILE}${HARBOR_VERSION}${TAR} ];then
${COLOR}"缺少${HARBOR_FILE}${HARBOR_VERSION}${TAR}文件,请把文件放到${SRC_DIR}目录下"${END}
exit
else
${COLOR}"相关文件已准备好"${END}
fi
}
install_docker(){
tar xf ${DOCKER_FILE}
mv docker/* /usr/bin/
cat > /lib/systemd/system/docker.service <<-EOF
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd -H unix://var/run/docker.sock
ExecReload=/bin/kill -s HUP \$MAINPID
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
# Uncomment TasksMax if your systemd version supports it.
# Only systemd 226 and above support this version.
#TasksMax=infinity
TimeoutStartSec=0
# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes
# kill only the docker process, not all processes in the cgroup
KillMode=process
# restart the docker process if it exits prematurely
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target
EOF
mkdir -p /etc/docker
cat > /etc/docker/daemon.json <<-EOF
{
"registry-mirrors": [
"https://registry.docker-cn.com",
"http://hub-mirror.c.163.com",
"https://docker.mirrors.ustc.edu.cn"
],
"insecure-registries": ["${HARBOR_DOMAIN}"],
"exec-opts": ["native.cgroupdriver=systemd"],
"max-concurrent-downloads": 10,
"max-concurrent-uploads": 5,
"log-opts": {
"max-size": "300m",
"max-file": "2"
},
"live-restore": true
}
EOF
echo 'alias rmi="docker images -qa|xargs docker rmi -f"' >> ~/.bashrc
echo 'alias rmc="docker ps -qa|xargs docker rm -f"' >> ~/.bashrc
systemctl daemon-reload
systemctl enable --now docker &> /dev/null
systemctl is-active docker &> /dev/null && ${COLOR}"Docker 服务启动成功"${END} || { ${COLOR}"Docker 启动失败"${END};exit; }
docker version && ${COLOR}"Docker 安装成功"${END} || ${COLOR}"Docker 安装失败"${END}
}
install_docker_compose(){
${COLOR}"开始安装 Docker compose....."${END}
sleep 1
mv ${SRC_DIR}/${DOCKER_COMPOSE_FILE} /usr/bin/docker-compose
chmod +x /usr/bin/docker-compose
docker-compose --version && ${COLOR}"Docker Compose 安装完成"${END} || ${COLOR}"Docker compose 安装失败"${END}
}
install_harbor(){
${COLOR}"开始安装 Harbor....."${END}
sleep 1
[ -d ${HARBOR_INSTALL_DIR} ] || mkdir ${HARBOR_INSTALL_DIR}
tar xf ${SRC_DIR}/${HARBOR_FILE}${HARBOR_VERSION}${TAR} -C ${HARBOR_INSTALL_DIR}/
mv ${HARBOR_INSTALL_DIR}/harbor/harbor.yml.tmpl ${HARBOR_INSTALL_DIR}/harbor/harbor.yml
sed -ri.bak -e 's/^(hostname:) .*/\1 '${IP}'/' -e 's/^(harbor_admin_password:) .*/\1 '${HARBOR_ADMIN_PASSWORD}'/' -e 's/^(https:)/#\1/' -e 's/ (port: 443)/# \1/' -e 's@ (certificate: .*)@# \1@' -e 's@ (private_key: .*)@# \1@' ${HARBOR_INSTALL_DIR}/harbor/harbor.yml
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;then
yum -y install python3 &> /dev/null || { ${COLOR}"安装软件包失败，请检查网络配置"${END}; exit; }
else
apt -y install python3 &> /dev/null || { ${COLOR}"安装软件包失败，请检查网络配置"${END}; exit; }
fi
${HARBOR_INSTALL_DIR}/harbor/install.sh && ${COLOR}"Harbor 安装完成"${END} || ${COLOR}"Harbor 安装失败"${END}
cat > /lib/systemd/system/harbor.service <<-EOF
[Unit]
Description=Harbor
After=docker.service systemd-networkd.service systemd-resolved.service
Requires=docker.service
Documentation=http://github.com/vmware/harbor
[Service]
Type=simple
Restart=on-failure
RestartSec=5
ExecStart=/usr/bin/docker-compose -f /apps/harbor/docker-compose.yml up
ExecStop=/usr/bin/docker-compose -f /apps/harbor/docker-compose.yml down
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable harbor &>/dev/null && ${COLOR}"Harbor已配置为开机自动启动"${END}
}
set_swap_limit(){
if [ ${OS_ID} == "Ubuntu" ];then
${COLOR}'设置Docker的"WARNING: No swap limit support"警告'${END}
sed -ri '/^GRUB_CMDLINE_LINUX=/s@"$@ swapaccount=1"@' /etc/default/grub
update-grub &> /dev/null
${COLOR}"10秒后，机器会自动重启"${END}
sleep 10
reboot
fi
}
main(){
os
check_file
[ -f /usr/bin/docker ] && ${COLOR}"Docker已安装"${END} || install_docker
docker-compose --version &> /dev/null && ${COLOR}"Docker Compose已安装"${END} || install_docker_compose
systemctl is-active harbor &> /dev/null && ${COLOR}"Harbor已安装"${END} || install_harbor
grep -q "swapaccount=1" /etc/default/grub && ${COLOR}'"WARNING: No swap limit support"警告,已设置'${END} || set_swap_limit
}
main
[root@k8s-harbor01 ~]# bash install_docker_compose_harbor.sh
[root@k8s-harbor02 ~]# bash install_docker_compose_harbor.sh
5.2 创建harbor仓库
在harbor01新建项目google_containers
在harbor02新建项目google_containers
在harbor02上新建目标
在harbor02上新建规则
在harbor01上新建目标
在harbor01上新建规则
6.部署etcd
6.1 安装etcd组件
github.com/kubernetes/…
下载etcd安装包
[root@k8s-etcd01 ~]# wget https://github.com/etcd-io/etcd/releases/download/v3.4.13/etcd-v3.4.13-linux-amd64.tar.gz
解压etcd安装文件
[root@k8s-etcd01 ~]# tar -xf etcd-v3.4.13-linux-amd64.tar.gz --strip-components=1 -C /usr/local/bin etcd-v3.4.13-linux-amd64/etcd{,ctl}
版本查看
[root@k8s-etcd01 ~]# etcdctl version
etcdctl version: 3.4.13
API version: 3.4
将组件发送到其他节点
[root@k8s-etcd01 ~]# for NODE in k8s-etcd02 k8s-etcd03; do echo $NODE; scp -o StrictHostKeyChecking=no /usr/local/bin/etcd* $NODE:/usr/local/bin/; done
etcd节点创建/opt/cni/bin目录
[root@k8s-etcd01 ~]# mkdir -p /opt/cni/bin
[root@k8s-etcd02 ~]# mkdir -p /opt/cni/bin
[root@k8s-etcd03 ~]# mkdir -p /opt/cni/bin
6.2 生成etcd证书
二进制安装最关键步骤，一步错误全盘皆输，一定要注意每个步骤都要是正确的
etcd01下载生成证书工具
[root@k8s-etcd01 ~]# wget "https://pkg.cfssl.org/R1.2/cfssl_linux-amd64" -O /usr/local/bin/cfssl
[root@k8s-etcd01 ~]# wget "https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64" -O /usr/local/bin/cfssljson
[root@k8s-etcd01 ~]# chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson
etcd节点创建etcd证书目录
[root@k8s-etcd01 ~]# mkdir /etc/etcd/ssl -p
[root@k8s-etcd02 ~]# mkdir /etc/etcd/ssl -p
[root@k8s-etcd03 ~]# mkdir /etc/etcd/ssl -p
etcd01节点生成etcd证书
生成证书的CSR文件：证书签名请求文件，配置了一些域名、公司、单位
[root@k8s-etcd01 ~]# mkdir pki
[root@k8s-etcd01 ~]# cd pki/
[root@k8s-etcd01 pki]# cat etcd-ca-csr.json
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
],
"ca": {
"expiry": "876000h"
}
}
# 生成etcd CA证书和CA证书的key
[root@k8s-etcd01 pki]# cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca
#执行结果
2022/02/25 15:32:30 [INFO] generating a new CA key and certificate from CSR
2022/02/25 15:32:30 [INFO] generate received request
2022/02/25 15:32:30 [INFO] received CSR
2022/02/25 15:32:30 [INFO] generating key: rsa-2048
2022/02/25 15:32:30 [INFO] encoded CSR
2022/02/25 15:32:30 [INFO] signed certificate with serial number 283470375480918891598291779152743682937426861184
[root@k8s-etcd01 pki]# ll /etc/etcd/ssl/etcd-ca*
-rw-r--r-- 1 root root 1005 Feb 25 15:32 /etc/etcd/ssl/etcd-ca.csr
-rw------- 1 root root 1679 Feb 25 15:32 /etc/etcd/ssl/etcd-ca-key.pem
-rw-r--r-- 1 root root 1367 Feb 25 15:32 /etc/etcd/ssl/etcd-ca.pem
[root@k8s-etcd01 pki]# cat ca-config.json
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "876000h"
}
}
}
}
[root@k8s-etcd01 pki]# cat etcd-csr.json
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
]
}
[root@k8s-etcd01 pki]# 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-etcd01,k8s-etcd02,k8s-etcd03,172.31.3.108,172.31.3.109,172.31.3.110 \
-profile=kubernetes \
etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd
#执行结果
2022/02/25 15:34:05 [INFO] generate received request
2022/02/25 15:34:05 [INFO] received CSR
2022/02/25 15:34:05 [INFO] generating key: rsa-2048
2022/02/25 15:34:05 [INFO] encoded CSR
2022/02/25 15:34:05 [INFO] signed certificate with serial number 621125122845507641888880600687542216934848214818
[root@k8s-etcd01 pki]# ll /etc/etcd/ssl/etcd*
-rw-r--r-- 1 root root 1005 Feb 25 15:32 /etc/etcd/ssl/etcd-ca.csr
-rw------- 1 root root 1679 Feb 25 15:32 /etc/etcd/ssl/etcd-ca-key.pem
-rw-r--r-- 1 root root 1367 Feb 25 15:32 /etc/etcd/ssl/etcd-ca.pem
-rw-r--r-- 1 root root 1005 Feb 25 15:34 /etc/etcd/ssl/etcd.csr
-rw------- 1 root root 1679 Feb 25 15:34 /etc/etcd/ssl/etcd-key.pem
-rw-r--r-- 1 root root 1501 Feb 25 15:34 /etc/etcd/ssl/etcd.pem
将etcd证书复制到其他etcd节点
[root@k8s-etcd01 pki]# for NODE in k8s-etcd02 k8s-etcd03; do
ssh -o StrictHostKeyChecking=no $NODE "mkdir -p /etc/etcd/ssl"
for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do
scp -o StrictHostKeyChecking=no /etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE}
done
done
6.3 Etcd配置
etcd配置大致相同，注意修改每个etcd节点的etcd配置的主机名和IP地址
6.3.1 etcd01
[root@k8s-etcd01 pki]# vim /etc/etcd/etcd.config.yml
name: 'k8s-etcd01'
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://172.31.3.108:2380'
listen-client-urls: 'https://172.31.3.108:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://172.31.3.108:2380'
advertise-client-urls: 'https://172.31.3.108:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-etcd01=https://172.31.3.108:2380,k8s-etcd02=https://172.31.3.109:2380,k8s-etcd03=https://172.31.3.110:2380'
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
6.3.2 etcd02
[root@k8s-etcd02 ~]# vim /etc/etcd/etcd.config.yml
name: 'k8s-etcd02'
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://172.31.3.109:2380'
listen-client-urls: 'https://172.31.3.109:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://172.31.3.109:2380'
advertise-client-urls: 'https://172.31.3.109:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-etcd01=https://172.31.3.108:2380,k8s-etcd02=https://172.31.3.109:2380,k8s-etcd03=https://172.31.3.110:2380'
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
6.3.3 etcd03
[root@k8s-etcd03 ~]# vim /etc/etcd/etcd.config.yml
name: 'k8s-etcd03'
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://172.31.3.110:2380'
listen-client-urls: 'https://172.31.3.110:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://172.31.3.110:2380'
advertise-client-urls: 'https://172.31.3.110:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-etcd01=https://172.31.3.108:2380,k8s-etcd02=https://172.31.3.109:2380,k8s-etcd03=https://172.31.3.110:2380'
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
6.3.4 创建Service
所有etcd节点创建etcd service并启动
[root@k8s-etcd01 pki]# vim /lib/systemd/system/etcd.service
[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
Restart=on-failure
RestartSec=10
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
Alias=etcd3.service
[root@k8s-etcd01 pki]# for NODE in k8s-etcd02 k8s-etcd03; do scp /lib/systemd/system/etcd.service $NODE:/lib/systemd/system/;done
所有etcd节点创建etcd的证书目录
[root@k8s-etcd01 pki]# mkdir /etc/kubernetes/pki/etcd -p
[root@k8s-etcd02 ~]# mkdir /etc/kubernetes/pki/etcd -p
[root@k8s-etcd03 ~]# mkdir /etc/kubernetes/pki/etcd -p
[root@k8s-etcd01 pki]# ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
[root@k8s-etcd02 ~]# ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
[root@k8s-etcd03 ~]# ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
[root@k8s-etcd01 pki]# systemctl daemon-reload && systemctl enable --now etcd
[root@k8s-etcd02 ~]# systemctl daemon-reload && systemctl enable --now etcd
[root@k8s-etcd03 ~]# systemctl daemon-reload && systemctl enable --now etcd
[root@k8s-etcd01 pki]# systemctl status etcd
● etcd.service - Etcd Service
Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled)
Active: active (running) since Fri 2022-02-25 15:45:24 CST; 12s ago
Docs: https://coreos.com/etcd/docs/latest/
Main PID: 12347 (etcd)
CGroup: /system.slice/etcd.service
└─12347 /usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Feb 25 15:45:26 k8s-etcd01.example.local etcd[12347]: health check for peer 209a1f57c506dba2 could not connect: dial tcp 172.31.3.110:...efused
Feb 25 15:45:26 k8s-etcd01.example.local etcd[12347]: health check for peer 209a1f57c506dba2 could not connect: dial tcp 172.31.3.110:...efused
Feb 25 15:45:26 k8s-etcd01.example.local etcd[12347]: peer 209a1f57c506dba2 became active
Feb 25 15:45:26 k8s-etcd01.example.local etcd[12347]: established a TCP streaming connection with peer 209a1f57c506dba2 (stream MsgApp...riter)
Feb 25 15:45:26 k8s-etcd01.example.local etcd[12347]: established a TCP streaming connection with peer 209a1f57c506dba2 (stream Message writer)
Feb 25 15:45:26 k8s-etcd01.example.local etcd[12347]: established a TCP streaming connection with peer 209a1f57c506dba2 (stream MsgApp...eader)
Feb 25 15:45:26 k8s-etcd01.example.local etcd[12347]: established a TCP streaming connection with peer 209a1f57c506dba2 (stream Message reader)
Feb 25 15:45:28 k8s-etcd01.example.local etcd[12347]: updating the cluster version from 3.0 to 3.4
Feb 25 15:45:28 k8s-etcd01.example.local etcd[12347]: updated the cluster version from 3.0 to 3.4
Feb 25 15:45:28 k8s-etcd01.example.local etcd[12347]: enabled capabilities for version 3.4
Hint: Some lines were ellipsized, use -l to show in full.
[root@k8s-etcd02 ~]# systemctl status etcd
[root@k8s-etcd03 ~]# systemctl status etcd
查看etcd状态
[root@k8s-etcd01 pki]# export ETCDCTL_API=3
[root@k8s-etcd01 pki]# etcdctl --endpoints="172.31.3.108:2379,172.31.3.109:2379,172.31.3.110:2379" --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 | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 172.31.3.108:2379 | a9fef56ff96ed75c | 3.4.13 | 20 kB | true | false | 3 | 9 | 9 | |
| 172.31.3.109:2379 | 8319ef09e8b3d277 | 3.4.13 | 20 kB | false | false | 3 | 9 | 9 | |
| 172.31.3.110:2379 | 209a1f57c506dba2 | 3.4.13 | 20 kB | false | false | 3 | 9 | 9 | |
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
重要：如果安装了keepalived和haproxy，需要测试keepalived是否是正常的
#测试VIP
[root@k8s-master01 pki]# ping 172.31.3.188
PING 172.31.3.188 (172.31.3.188) 56(84) bytes of data.
64 bytes from 172.31.3.188: icmp_seq=1 ttl=64 time=1.27 ms
64 bytes from 172.31.3.188: icmp_seq=2 ttl=64 time=0.585 ms
^C
--- 172.31.3.188 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 0.585/0.931/1.277/0.346 ms
[root@k8s-ha01 ~]# systemctl stop keepalived
[root@k8s-ha01 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:05:9b:2a brd ff:ff:ff:ff:ff:ff
inet 172.31.3.104/21 brd 172.31.7.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe05:9b2a/64 scope link
valid_lft forever preferred_lft forever
[root@k8s-ha02 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:5e:d8:f8 brd ff:ff:ff:ff:ff:ff
inet 172.31.3.105/21 brd 172.31.7.255 scope global eth0
valid_lft forever preferred_lft forever
inet 172.31.3.188/32 scope global eth0:1
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe5e:d8f8/64 scope link
valid_lft forever preferred_lft forever
[root@k8s-ha01 ~]# systemctl start keepalived
[root@k8s-ha01 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:05:9b:2a brd ff:ff:ff:ff:ff:ff
inet 172.31.3.104/21 brd 172.31.7.255 scope global eth0
valid_lft forever preferred_lft forever
inet 172.31.3.188/32 scope global eth0:1
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe05:9b2a/64 scope link
valid_lft forever preferred_lft forever
[root@k8s-master01 pki]# telnet 172.31.3.188 6443
Trying 172.31.3.188...
Connected to 172.31.3.188.
Escape character is '^]'.
Connection closed by foreign host.
如果ping不通且telnet没有出现 ] ，则认为VIP不可以，不可在继续往下执行，需要排查keepalived的问题，比如防火墙和selinux，haproxy和keepalived的状态，监听端口等
所有节点查看防火墙状态必须为disable和inactive：systemctl status firewalld
所有节点查看selinux状态，必须为disable：getenforce
master节点查看haproxy和keepalived状态：systemctl status keepalived haproxy
master节点查看监听端口：netstat -lntp
