安装要求
在开始之前，部署Kubernetes集群机器需要满足以下几个条件：
- 一台或多台机器，操作系统CentOS7.x-86_64（个人选择CentOS7.2）
- 硬件配置：2GB或更多RAM，2个CPU或更多CPU，硬盘30GB或更多
- 集群中所有机器之间网络互通
- 可以访问外网，需要拉取镜像，如果服务器不能上网，需要提前下载镜像并导入节点
- 禁止swap分区
准备环境
（1）软件环境：
| 软件 | 版本 |
|---|---|
| Kubernetes | 1.19 |
（2）服务器规划：
| 角色 | IP | 组件 |
|---|---|---|
| k8s-m1 | 192.168.1.147 | kube-apiserver, kube-controller-manager, kube-scheduler, etcd |
| k8s-n1 | 192.168.1.148 | kubelet, kube-proxy, docker etcd |
操作系统初始化配置
# 关闭防火墙 如果是minimal安装，默认没有装firewalld
systemctl stop firewalld
systemctl disable firewalld
#关闭selinux
sed -i 's/enforcing/disabled/' /etc/selinux/config #永久
setenforce 0 #临时
#关闭swap
swapoff -a #临时
sed -ri 's/.*swap.*/#&/' /etc/fstab #永久
#根据规划设置主机名
hostnamectl set-hostname <hostname> #分别设置为k8s-m1、k8s-n1
hostname #确认是否配置生效
#在master添加hosts
cat >> /etc/hosts << EOF
192.168.1.147 k8s-m1
192.168.1.148 k8s-n1
EOF
ping k8s-n1 #确认配置生效
#将桥接的IPv4流量传递到iptables的链
cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system #生效
#时间同步
yum install ntpdate -y
ntpdate time.windows.com
部署etcd集群
etcd是一个分布式键值存储系统，Kubernetes使用etcd进行数据存储，所以先准备一个etcd数据库，为解决etcd单点故障，应采用集群方式部署，这里使用2台组建集群，当然，你也可以使用3台、5台组建集群，可容忍1台、2台机器故障。
| 节点名称 | IP |
|---|---|
| etcd-1 | 192.168.1.147 |
| etcd-2 | 192.168.1.148 |
注：为了节省机器，这里与k8s节点机器复用，也可以独立于k8s集群之外部署，只要apiserver能连接就行。
4.1 准备cfssl证书生成工具
cfssl是一个开源的证书管理工具，使用json文件生成证书，相比openssl更方便使用。
找任意一台服务器操作，这里用k8s-m1节点。
yum install wget -y
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/local/bin/cfssl-certinfo
#确认文件移到正确的位置
$ ls -l /usr/local/bin/
total 18808
-rwxr-xr-x. 1 root root 10376657 Dec 7 02:36 cfssl
-rwxr-xr-x. 1 root root 6595195 Dec 7 02:36 cfssl-certinfo
-rwxr-xr-x. 1 root root 2277873 Dec 7 02:35 cfssljson
4.2 生成etcd证书
（1）自签证书颁发机构（CA）
创建工作目录：
mkdir -p ~/TLS/{etcd,k8s}
cd ~/TLS/etcd
自签CA：
cat > ca-config.json << EOF
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"www": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
cat > ca-csr.json << EOF
{
"CN": "etcd CA",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing"
}
]
}
EOF
生成证书：
$ cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
2022/01/31 20:33:58 [INFO] generating a new CA key and certificate from CSR
2022/01/31 20:33:58 [INFO] generate received request
2022/01/31 20:33:58 [INFO] received CSR
2022/01/31 20:33:58 [INFO] generating key: rsa-2048
2022/01/31 20:33:58 [INFO] encoded CSR
$ ls *pem
ca-key.pem ca.pem
（2）使用自签CA签发etcd HTTPS证书
创建证书申请文件：
cat > server-csr.json << EOF
{
"CN": "etcd",
"hosts": [
"192.168.1.147",
"192.168.1.148"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
}
]
}
EOF
注：上述文件hosts字段中IP为所有etcd及诶单的集群内部通信IP，一个都不能少！为了方便后期扩容可以多些几个预留的IP。
生成证书：
$ cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
2022/01/31 20:34:22 [INFO] generate received request
2022/01/31 20:34:22 [INFO] received CSR
2022/01/31 20:34:22 [INFO] generating key: rsa-2048
2022/01/31 20:34:23 [INFO] encoded CSR
2022/01/31 20:34:23 [INFO] signed certificate with serial number 662529260630305134909583808009574907087019149943
2022/01/31 20:34:23 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
$ ls server*pem
server-key.pem server.pem
4.3 从Github下载二进制文件
下载地址：
cd ~
wget https://github.com/etcd-io/etcd/releases/download/v3.4.9/etcd-v3.4.9-linux-amd64.tar.gz
4.4 部署etcd集群
以下在节点1（k8s-m1）上操作，为简化操作，待会儿将节点1生成的所有文件拷贝到节点2（k8s-n1）。
（1）创建工作目录并解压二进制包
mkdir /opt/etcd/{bin,cfg,ssl} -p
tar zxvf etcd-v3.4.9-linux-amd64.tar.gz
mv etcd-v3.4.9-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/
（2）创建etcd配置文件
cat > /opt/etcd/cfg/etcd.conf << EOF
#[Member]
ETCD_NAME="etcd-1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.1.147:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.1.147:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.147:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.147:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.1.147:2380,etcd-2=https://192.168.1.148:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF
（3）systemd管理etcd
cat > /usr/lib/systemd/system/etcd.service << EOF
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/opt/etcd/cfg/etcd.conf
ExecStart=/opt/etcd/bin/etcd \
--cert-file=/opt/etcd/ssl/server.pem \
--key-file=/opt/etcd/ssl/server-key.pem \
--peer-cert-file=/opt/etcd/ssl/server.pem \
--peer-key-file=/opt/etcd/ssl/server-key.pem \
--trusted-ca-file=/opt/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem \
--logger=zap
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
（4）拷贝刚才生成的证书
把刚才生成的证书拷贝到配置文件中的路径：
cp ~/TLS/etcd/ca*pem ~/TLS/etcd/server*pem /opt/etcd/ssl/
（5）将上面节点1所有的生成文件拷贝到节点2
scp -r /opt/etcd/ root@192.168.1.148:/opt/
scp /usr/lib/systemd/system/etcd.service root@192.168.1.148:/usr/lib/systemd/system/
然后在节点2修改etcd.conf配置文件中的节点名称和当前服务器IP：
vi /opt/etcd/cfg/etcd.conf
#[Member]
ETCD_NAME="etcd-2" # 修改此处，节点2改为etcd-2
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.1.148:2380" # 修改此处为当前服务器IP
ETCD_LISTEN_CLIENT_URLS="https://192.168.1.148:2379" # 修改此处为当前服务器IP
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.148:2380" # 修改此处为当前服务器IP
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.148:2379" # 修改此处为当前服务器IP
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.1.147:2380,etcd-2=https://192.168.1.148:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
（6）分别在2个节点上操作，启动并设置开机启动
systemctl daemon-reload
systemctl start etcd # 只有其中1节点启动正常，另1节点才启动正常
systemctl enable etcd
（7）查看集群状态
$ systemctl status etcd # 以master为例
● etcd.service - Etcd Server
Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2022-01-31 20:38:43 EST; 15s ago
Main PID: 3193 (etcd)
CGroup: /system.slice/etcd.service
└─3193 /opt/etcd/bin/etcd --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --peer-cert-file=/...
Jan 31 20:38:43 k8s-m1 etcd[3193]: {"level":"info","ts":"2022-01-31T20:38:43.558-0500","caller":"rafthttp/stream.go:425","msg...f0fb9"}
Jan 31 20:38:43 k8s-m1 etcd[3193]: {"level":"info","ts":"2022-01-31T20:38:43.561-0500","caller":"raft/raft.go:859","msg":"bd5...: 13]"}
Jan 31 20:38:43 k8s-m1 etcd[3193]: {"level":"info","ts":"2022-01-31T20:38:43.561-0500","caller":"raft/raft.go:700","msg":"bd5...rm 13"}
Jan 31 20:38:43 k8s-m1 etcd[3193]: {"level":"info","ts":"2022-01-31T20:38:43.561-0500","caller":"raft/raft.go:960","msg":"bd5...rm 13"}
Jan 31 20:38:43 k8s-m1 etcd[3193]: {"level":"info","ts":"2022-01-31T20:38:43.562-0500","caller":"raft/node.go:325","msg":"raf...rm 13"}
Jan 31 20:38:43 k8s-m1 etcd[3193]: {"level":"info","ts":"2022-01-31T20:38:43.590-0500","caller":"etcdserver/server.go:2036","msg":"p...
Jan 31 20:38:43 k8s-m1 systemd[1]: Started Etcd Server.
Jan 31 20:38:43 k8s-m1 etcd[3193]: {"level":"info","ts":"2022-01-31T20:38:43.592-0500","caller":"embed/serve.go:191","msg":"s...:2379"}
Jan 31 20:38:43 k8s-m1 etcd[3193]: {"level":"info","ts":"2022-01-31T20:38:43.606-0500","caller":"membership/cluster.go:558","...:"3.4"}
Jan 31 20:38:43 k8s-m1 etcd[3193]: {"level":"info","ts":"2022-01-31T20:38:43.606-0500","caller":"api/capability.go:76","msg":...:"3.4"}
Hint: Some lines were ellipsized, use -l to show in full.
$ ETCDCTL_API=3 /opt/etcd/bin/etcdctl --cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.1.147:2379,https://192.168.1.148:2379" endpoint health
https://192.168.1.147:2379 is healthy: successfully committed proposal: took = 32.800257ms
https://192.168.1.148:2379 is healthy: successfully committed proposal: took = 35.691684ms
安装Docker
下载地址：
download.docker.com/linux/stati…
# 两个节点都需下载
wget https://download.docker.com/linux/static/stable/x86_64/docker-19.03.9.tgz
以下在所有节点操作，这里采用二进制安装，用yum安装也一样。
（1）解压二进制包
tar zxvf docker-19.03.9.tgz
mv docker/* /usr/bin
（2）systemd管理docker
cat > /usr/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
ExecStart=/usr/bin/dockerd
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target
EOF
（3）创建配置文件
mkdir /etc/docker
cat > /etc/docker/daemon.json << EOF
{
"registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
}
EOF
# registry-mirrors 阿里云镜像加速器
（4）启动并设置开机启动
systemctl daemon-reload
systemctl start docker
systemctl enable docker
# 确认启动正常，以master为例
$ systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2022-01-31 20:41:19 EST; 6s ago
Docs: https://docs.docker.com
Main PID: 3258 (dockerd)
CGroup: /system.slice/docker.service
├─3258 /usr/bin/dockerd
└─3266 containerd --config /var/run/docker/containerd/containerd.toml --log-level info
Jan 31 20:41:19 k8s-m1 dockerd[3258]: time="2022-01-31T20:41:19.380636521-05:00" level=error msg="Failed to built-in GetDrive...docker"
Jan 31 20:41:19 k8s-m1 dockerd[3258]: time="2022-01-31T20:41:19.395520006-05:00" level=warning msg="mountpoint for pids not found"
Jan 31 20:41:19 k8s-m1 dockerd[3258]: time="2022-01-31T20:41:19.395725127-05:00" level=info msg="Loading containers: start."
Jan 31 20:41:19 k8s-m1 dockerd[3258]: time="2022-01-31T20:41:19.403734059-05:00" level=warning msg="Running modprobe bridge br_netfi...
Jan 31 20:41:19 k8s-m1 dockerd[3258]: time="2022-01-31T20:41:19.508149552-05:00" level=info msg="Default bridge (docker0) is ...ddress"
Jan 31 20:41:19 k8s-m1 dockerd[3258]: time="2022-01-31T20:41:19.577201992-05:00" level=info msg="Loading containers: done."
Jan 31 20:41:19 k8s-m1 dockerd[3258]: time="2022-01-31T20:41:19.607712388-05:00" level=info msg="Docker daemon" commit=9d9883...19.03.9
Jan 31 20:41:19 k8s-m1 dockerd[3258]: time="2022-01-31T20:41:19.607976741-05:00" level=info msg="Daemon has completed initialization"
Jan 31 20:41:19 k8s-m1 dockerd[3258]: time="2022-01-31T20:41:19.638941291-05:00" level=info msg="API listen on /var/run/docker.sock"
Jan 31 20:41:19 k8s-m1 systemd[1]: Started Docker Application Container Engine.
Hint: Some lines were ellipsized, use -l to show in full.
部署Master Node
6.1 生成kube-apiserver证书
（1）自签证书颁发机构（CA）
cd ~/TLS/k8s
cat > ca-config.json << EOF
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"kubernetes": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
cat > ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
生成证书：
$ cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
2022/01/31 20:48:05 [INFO] generating a new CA key and certificate from CSR
2022/01/31 20:48:05 [INFO] generate received request
2022/01/31 20:48:05 [INFO] received CSR
2022/01/31 20:48:05 [INFO] generating key: rsa-2048
2022/01/31 20:48:05 [INFO] encoded CSR
2022/01/31 20:48:05 [INFO] signed certificate with serial number 116190676499051077223279420283858349481970680819
$ ls *pem
ca-key.pem ca.pem
（2）使用自签CA签发kube-apiserver HTTPS证书
创建证书申请文件：
cat > server-csr.json << EOF
{
"CN": "kubernetes",
"hosts": [
"10.0.0.1",
"127.0.0.1",
"192.168.1.147",
"192.168.1.148",
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
注：上述文件hosts字段中IP为所有Master/LB/VIP IP，一个都不能少！为了方便后期扩容可以多写几个预留的IP。
生成证书：
$ cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
2022/01/31 20:48:29 [INFO] generate received request
2022/01/31 20:48:29 [INFO] received CSR
2022/01/31 20:48:29 [INFO] generating key: rsa-2048
2022/01/31 20:48:29 [INFO] encoded CSR
2022/01/31 20:48:29 [INFO] signed certificate with serial number 269930624984000095763889980982980819493992440261
2022/01/31 20:48:29 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
$ ls server*pem
server-key.pem server.pem
6.2 从Github下载二进制文件
通过github查看下载链接，
cd ~
wget https://dl.k8s.io/v1.19.16/kubernetes-server-linux-amd64.tar.gz
6.3 解压二进制包
mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs}
tar zxvf kubernetes-server-linux-amd64.tar.gz
cd kubernetes/server/bin
cp kube-apiserver kube-scheduler kube-controller-manager /opt/kubernetes/bin
cp kubectl /usr/bin/
6.4 部署kube-apiserver
（1）创建配置文件
cat > /opt/kubernetes/cfg/kube-apiserver.conf << EOF
KUBE_APISERVER_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--etcd-servers=https://192.168.1.147:2379,https://192.168.1.148:2379 \
--bind-address=192.168.1.147 \
--secure-port=6443 \
--advertise-address=192.168.1.147 \
--allow-privileged=true \
--service-cluster-ip-range=10.0.0.0/24 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--enable-bootstrap-token-auth=true \
--token-auth-file=/opt/kubernetes/cfg/token.csv \
--service-node-port-range=30000-32767 \
--kubelet-client-certificate=/opt/kubernetes/ssl/server.pem \
--kubelet-client-key=/opt/kubernetes/ssl/server-key.pem \
--tls-cert-file=/opt/kubernetes/ssl/server.pem \
--tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \
--client-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/opt/etcd/ssl/ca.pem \
--etcd-certfile=/opt/etcd/ssl/server.pem \
--etcd-keyfile=/opt/etcd/ssl/server-key.pem \
--audit-log-maxage=30 \
--audit-log-maxbackup=3 \
--audit-log-maxsize=100 \
--audit-log-path=/opt/kubernetes/logs/k8s-audit.log"
EOF
注：上面两个\ \ 第一个是转义符，第二个是换行符，使用转义符是为了使用EOF保留换行符。
–logtostderr：启用日志
—v：日志等级
–log-dir：日志目录
–etcd-servers：etcd集群地址
–bind-address：监听地址
–secure-port：https安全端口
–advertise-address：集群通告地址
–allow-privileged：启用授权
–service-cluster-ip-range：Service虚拟IP地址段
–enable-admission-plugins：准入控制模块
–authorization-mode：认证授权，启用RBAC授权和节点自管理
–enable-bootstrap-token-auth：启用TLS bootstrap机制
–token-auth-file：bootstrap token文件
–service-node-port-range：Service nodeport类型默认分配端口范围
–kubelet-client-xxx：apiserver访问kubelet客户端证书
–tls-xxx-file：apiserver https证书
–etcd-xxxfile：连接Etcd集群证书
–audit-log-xxx：审计日志
（2）拷贝刚才生成的证书
把刚才生成的证书拷贝到配置文件中的路径：
cp ~/TLS/k8s/ca*pem ~/TLS/k8s/server*pem /opt/kubernetes/ssl/
（3）启用 TLS Bootstrapping 机制
TLS Bootstraping：Master apiserver启用TLS认证后，Node节点kubelet和kube-proxy要与kube-apiserver进行通信，必须使用CA签发的有效证书才可以，当Node节点很多时，这种客户端证书颁发需要大量工作，同样也会增加集群扩展复杂度。为了简化流程，Kubernetes引入了TLS bootstraping机制来自动颁发客户端证书，kubelet会以一个低权限用户自动向apiserver申请证书，kubelet的证书由apiserver动态签署。所以强烈建议在Node上使用这种方式，目前主要用于kubelet，kube-proxy还是由我们统一颁发一个证书。
TLS bootstraping 工作流程：
创建上述配置文件中token文件：
cat > /opt/kubernetes/cfg/token.csv << EOF
c47ffb939f5ca36231d9e3121a252940,kubelet-bootstrap,10001,"system:node-bootstrapper"
EOF
格式：token，用户名，UID，用户组
token也可自行生成替换：
head -c 16 /dev/urandom | od -An -t x | tr -d ' '
（4）systemd管理apiserver
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-apiserver.conf
ExecStart=/opt/kubernetes/bin/kube-apiserver $KUBE_APISERVER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
（5）启动并设置开机启动
systemctl daemon-reload
systemctl start kube-apiserver
systemctl enable kube-apiserver
# 确认状态运行正常
$ systemctl status kube-apiserver
● kube-apiserver.service - Kubernetes API Server
Loaded: loaded (/usr/lib/systemd/system/kube-apiserver.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2022-01-31 20:50:15 EST; 10s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 3519 (kube-apiserver)
CGroup: /system.slice/kube-apiserver.service
└─3519 /opt/kubernetes/bin/kube-apiserver --logtostderr=false --v=2 --log-dir=/opt/kubernetes/logs --etcd-servers=https:/...
Jan 31 20:50:15 k8s-m1 systemd[1]: Started Kubernetes API Server.
Jan 31 20:50:15 k8s-m1 systemd[1]: Starting Kubernetes API Server...
Jan 31 20:50:21 k8s-m1 kube-apiserver[3519]: E0131 20:50:21.270473 3519 controller.go:152] Unable to remove old endpoints f...orMsg:
Hint: Some lines were ellipsized, use -l to show in full.
（6）授权kubelet-bootstrap用户允许请求证书
kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper \
--user=kubelet-bootstrap
6.5 部署kube-controller-manager
（1）创建配置文件
cat > /opt/kubernetes/cfg/kube-controller-manager.conf << EOF
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--leader-elect=true \
--master=127.0.0.1:8080 \
--bind-address=127.0.0.1 \
--allocate-node-cidrs=true \
--cluster-cidr=10.244.0.0/16 \
--service-cluster-ip-range=10.0.0.0/24 \
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem \
--root-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \
--experimental-cluster-signing-duration=87600h0m0s"
EOF
–master：通过本地非安全本地端口8080连接apiserver。
–leader-elect：当该组件启动多个时，自动选举（HA）
–
cluster-signing-cert-file/–cluster-signing-key-file：自动为kubelet颁发证书的CA，与apiserver保持一致
（2）systemd管理controller-manager
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-controller-manager.conf
ExecStart=/opt/kubernetes/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
（3）启动并设置开机启动
systemctl daemon-reload
systemctl start kube-controller-manager
systemctl enable kube-controller-manager
# 确认状态运行正常
$ systemctl status kube-controller-manager
● kube-controller-manager.service - Kubernetes Controller Manager
Loaded: loaded (/usr/lib/systemd/system/kube-controller-manager.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2022-01-31 20:51:00 EST; 6s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 3574 (kube-controller)
CGroup: /system.slice/kube-controller-manager.service
└─3574 /opt/kubernetes/bin/kube-controller-manager --logtostderr=false --v=2 --log-dir=/opt/kubernetes/logs --leader-elec...
Jan 31 20:51:00 k8s-m1 systemd[1]: Started Kubernetes Controller Manager.
Jan 31 20:51:00 k8s-m1 systemd[1]: Starting Kubernetes Controller Manager...
Jan 31 20:51:00 k8s-m1 kube-controller-manager[3574]: Flag --experimental-cluster-signing-duration has been deprecated, use --...ration
Hint: Some lines were ellipsized, use -l to show in full.
6.6 部署kube-scheduler
（1）创建配置文件
cat > /opt/kubernetes/cfg/kube-scheduler.conf << EOF
KUBE_SCHEDULER_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--leader-elect \
--master=127.0.0.1:8080 \
--bind-address=127.0.0.1"
EOF
–master：通过本地非安全本地端口8080连接apiserver。
–leader-elect：当该组件启动多个时，自动选举（HA）
（2）systemd管理scheduler
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-scheduler.conf
ExecStart=/opt/kubernetes/bin/kube-scheduler $KUBE_SCHEDULER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
（3）启动并设置开机启动
systemctl daemon-reload
systemctl start kube-scheduler
systemctl enable kube-scheduler
# 确认状态运行正常
$ systemctl status kube-scheduler
● kube-scheduler.service - Kubernetes Scheduler
Loaded: loaded (/usr/lib/systemd/system/kube-scheduler.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2022-01-31 20:51:40 EST; 6s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 3622 (kube-scheduler)
CGroup: /system.slice/kube-scheduler.service
└─3622 /opt/kubernetes/bin/kube-scheduler --logtostderr=false --v=2 --log-dir=/opt/kubernetes/logs --leader-elect --maste...
Jan 31 20:51:40 k8s-m1 systemd[1]: Started Kubernetes Scheduler.
Jan 31 20:51:40 k8s-m1 systemd[1]: Starting Kubernetes Scheduler...
Jan 31 20:51:41 k8s-m1 kube-scheduler[3622]: I0131 20:51:41.106830 3622 registry.go:173] Registering SelectorSpread plugin
Jan 31 20:51:41 k8s-m1 kube-scheduler[3622]: I0131 20:51:41.106928 3622 registry.go:173] Registering SelectorSpread plugin
（4）查看集群状态
生成kubectl连接集群的证书：
cat > ~/TLS/k8s/admin-csr.json <<EOF
{
"CN": "admin",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "system:masters",
"OU": "System"
}
]
}
EOF
cd ~/TLS/k8s/
$ cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin
2022/01/31 20:52:20 [INFO] generate received request
2022/01/31 20:52:20 [INFO] received CSR
2022/01/31 20:52:20 [INFO] generating key: rsa-2048
2022/01/31 20:52:20 [INFO] encoded CSR
2022/01/31 20:52:20 [INFO] signed certificate with serial number 33977062448795114188979902834329419113167886225
2022/01/31 20:52:20 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
生成kubeconfig文件：
mkdir /root/.kube
cd ~/TLS/k8s/
KUBE_CONFIG="/root/.kube/config"
KUBE_APISERVER="https://192.168.1.147:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials cluster-admin \
--client-certificate=./admin.pem \
--client-key=./admin-key.pem \
--embed-certs=true \
--kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
--cluster=kubernetes \
--user=cluster-admin \
--kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}
所有组件都已经启动成功，通过kubectl工具查看当前集群组件状态：
$ kubectl get cs # 曾在kubectl config set-credentials命令后出现错误，需要进入~/TLS/k8s目录下
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-0 Healthy {"health":"true"}
etcd-1 Healthy {"health":"true"}
如上输出说明Master节点组件运行正常
部署Worker Node
说明：下面还是在Master Node上操作，即同时作为Worker Node
7.1 创建工作目录并拷贝二进制文件
（1）在所有worker node创建工作目录：
cd ~
mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs} # 之前master上已创建，无需再创建
从master节点拷贝：
cd kubernetes/server/bin
cp kubelet kube-proxy /opt/kubernetes/bin # 本地拷贝
7.2 部署kubelet
（1）创建配置文件
cat > /opt/kubernetes/cfg/kubelet.conf << EOF
KUBELET_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--hostname-override=k8s-m1 \
--network-plugin=cni \
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \
--bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \
--config=/opt/kubernetes/cfg/kubelet-config.yml \
--cert-dir=/opt/kubernetes/ssl \
--pod-infra-container-image=lizhenliang/pause-amd64:3.0"
EOF
–hostname-override：显示名称，集群中唯一
–network-plugin：启用CNI
–kubeconfig：空路径，会自动生成，后面用于连接apiserver
–bootstrap-kubeconfig：首次启动向apiserver申请证书
–config：配置参数文件
–cert-dir：kubelet证书生成目录
–pod-infra-container-image：管理Pod网络容器的镜像
（2）配置参数文件
cat > /opt/kubernetes/cfg/kubelet-config.yml << EOF
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local
failSwapOn: false
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 2m0s
enabled: true
x509:
clientCAFile: /opt/kubernetes/ssl/ca.pem
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
maxOpenFiles: 1000000
maxPods: 110
EOF
（3）生成bootstrap.kubeconfig文件
cd ~
KUBE_APISERVER="https://192.168.1.147:6443" # apiserver IP:PORT
TOKEN="c47ffb939f5ca36231d9e3121a252940" # 与token.csv里保持一致
# 生成 kubelet bootstrap kubeconfig 配置文件
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=bootstrap.kubeconfig
kubectl config set-credentials "kubelet-bootstrap" \
--token=${TOKEN} \
--kubeconfig=bootstrap.kubeconfig
kubectl config set-context default \
--cluster=kubernetes \
--user="kubelet-bootstrap" \
--kubeconfig=bootstrap.kubeconfig
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
拷贝到配置文件路径：
cp bootstrap.kubeconfig /opt/kubernetes/cfg
（4）systemd管理kubelet
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
After=docker.service
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kubelet.conf
ExecStart=/opt/kubernetes/bin/kubelet $KUBELET_OPTS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
（5）启动并设置开机启动
systemctl daemon-reload
systemctl start kubelet
systemctl enable kubelet
# 确认状态正常运行
$ systemctl status kubelet
● kubelet.service - Kubernetes Kubelet
Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2022-01-31 20:57:36 EST; 6s ago
Main PID: 3744 (kubelet)
CGroup: /system.slice/kubelet.service
└─3744 /opt/kubernetes/bin/kubelet --logtostderr=false --v=2 --log-dir=/opt/kubernetes/logs --hostname-override=k8s-m1 --...
Jan 31 20:57:36 k8s-m1 systemd[1]: Started Kubernetes Kubelet.
Jan 31 20:57:36 k8s-m1 systemd[1]: Starting Kubernetes Kubelet...
7.3 批准kubelet证书申请并加入集群
# 查看kubelet证书请求
$ kubectl get csr
NAME AGE SIGNERNAME REQUESTOR CONDITION
node-csr-mJUDZWs1ZgjeMxO5cKHmN93miRvt-aVFHE25fmcfEC0 20s kubernetes.io/kube-apiserver-client-kubelet kubelet-bootstrap Pending
# 批准申请
$ kubectl certificate approve node-csr-mJUDZWs1ZgjeMxO5cKHmN93miRvt-aVFHE25fmcfEC0
certificatesigningrequest.certificates.k8s.io/node-csr-mJUDZWs1ZgjeMxO5cKHmN93miRvt-aVFHE25fmcfEC0 approved
# 查看节点
$ kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-m1 NotReady <none> 6s v1.19.16
注：由于网络插件还没有部署，节点会没有准备就绪 NotReady
7.4 部署kube-proxy
（1）创建配置文件
cat > /opt/kubernetes/cfg/kube-proxy.conf << EOF
KUBE_PROXY_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--config=/opt/kubernetes/cfg/kube-proxy-config.yml"
EOF
（2）配置参数文件
cat > /opt/kubernetes/cfg/kube-proxy-config.yml << EOF
kind: KubeProxyConfiguration
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
metricsBindAddress: 0.0.0.0:10249
clientConnection:
kubeconfig: /opt/kubernetes/cfg/kube-proxy.kubeconfig
hostnameOverride: k8s-m1
clusterCIDR: 10.0.0.0/24
EOF
（3）生成kube-proxy.kubeconfig文件
生成kube-proxy证书：
# 切换工作目录
cd TLS/k8s
# 创建证书请求文件
cat > kube-proxy-csr.json << EOF
{
"CN": "system:kube-proxy",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
# 生成证书
$ cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
2022/01/31 20:59:20 [INFO] generate received request
2022/01/31 20:59:20 [INFO] received CSR
2022/01/31 20:59:20 [INFO] generating key: rsa-2048
2022/01/31 20:59:20 [INFO] encoded CSR
2022/01/31 20:59:20 [INFO] signed certificate with serial number 295992655043122107605462071788881029347482203196
2022/01/31 20:59:20 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
$ ls kube-proxy*pem
kube-proxy-key.pem kube-proxy.pem
生成kubeconfig文件：
KUBE_APISERVER="https://192.168.1.147:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \
--client-certificate=./kube-proxy.pem \
--client-key=./kube-proxy-key.pem \
--embed-certs=true \
--kubeconfig=kube-proxy.kubeconfig
kubectl config set-context default \
--cluster=kubernetes \
--user=kube-proxy \
--kubeconfig=kube-proxy.kubeconfig
kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig
拷贝到配置文件指定路径：
cp kube-proxy.kubeconfig /opt/kubernetes/cfg/
（4）systemd管理kube-proxy
cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Proxy
After=network.target
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-proxy.conf
ExecStart=/opt/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
（5）启动并设置开机启动
systemctl daemon-reload
systemctl start kube-proxy
systemctl enable kube-proxy
# 确认状态运行正常
$ systemctl status kube-proxy
● kube-proxy.service - Kubernetes Proxy
Loaded: loaded (/usr/lib/systemd/system/kube-proxy.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2022-01-31 21:00:25 EST; 12s ago
Main PID: 4373 (kube-proxy)
CGroup: /system.slice/kube-proxy.service
└─4373 /opt/kubernetes/bin/kube-proxy --logtostderr=false --v=2 --log-dir=/opt/kubernetes/logs --config=/opt/kubernetes/c...
Jan 31 21:00:25 k8s-m1 systemd[1]: Started Kubernetes Proxy.
Jan 31 21:00:25 k8s-m1 systemd[1]: Starting Kubernetes Proxy...
7.5 部署CNI网络
（1）准备好CNI二进制文件：
cd ~
wget https://github.com/containernetworking/plugins/releases/download/v0.8.6/cni-plugins-linux-amd64-v0.8.6.tgz
解压二进制包并移动到默认工作目录：
mkdir -p /opt/cni/bin
tar zxvf cni-plugins-linux-amd64-v0.8.6.tgz -C /opt/cni/bin
部署CNI网络，创建kube-flannel.yml：
cat > kube-flannel.yml << EOF
---
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
name: psp.flannel.unprivileged
annotations:
seccomp.security.alpha.kubernetes.io/allowedProfileNames: docker/default
seccomp.security.alpha.kubernetes.io/defaultProfileName: docker/default
apparmor.security.beta.kubernetes.io/allowedProfileNames: runtime/default
apparmor.security.beta.kubernetes.io/defaultProfileName: runtime/default
spec:
privileged: false
volumes:
- configMap
- secret
- emptyDir
- hostPath
allowedHostPaths:
- pathPrefix: "/etc/cni/net.d"
- pathPrefix: "/etc/kube-flannel"
- pathPrefix: "/run/flannel"
readOnlyRootFilesystem: false
# Users and groups
runAsUser:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
fsGroup:
rule: RunAsAny
# Privilege Escalation
allowPrivilegeEscalation: false
defaultAllowPrivilegeEscalation: false
# Capabilities
allowedCapabilities: ['NET_ADMIN']
defaultAddCapabilities: []
requiredDropCapabilities: []
# Host namespaces
hostPID: false
hostIPC: false
hostNetwork: true
hostPorts:
- min: 0
max: 65535
# SELinux
seLinux:
# SELinux is unused in CaaSP
rule: 'RunAsAny'
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: flannel
rules:
- apiGroups: ['extensions']
resources: ['podsecuritypolicies']
verbs: ['use']
resourceNames: ['psp.flannel.unprivileged']
- apiGroups:
- ""
resources:
- pods
verbs:
- get
- apiGroups:
- ""
resources:
- nodes
verbs:
- list
- watch
- apiGroups:
- ""
resources:
- nodes/status
verbs:
- patch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: flannel
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: flannel
subjects:
- kind: ServiceAccount
name: flannel
namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: flannel
namespace: kube-system
---
kind: ConfigMap
apiVersion: v1
metadata:
name: kube-flannel-cfg
namespace: kube-system
labels:
tier: node
app: flannel
data:
cni-conf.json: |
{
"name": "cbr0",
"cniVersion": "0.3.1",
"plugins": [
{
"type": "flannel",
"delegate": {
"hairpinMode": true,
"isDefaultGateway": true
}
},
{
"type": "portmap",
"capabilities": {
"portMappings": true
}
}
]
}
net-conf.json: |
{
"Network": "10.244.0.0/16",
"Backend": {
"Type": "vxlan"
}
}
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-amd64
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: beta.kubernetes.io/os
operator: In
values:
- linux
- key: beta.kubernetes.io/arch
operator: In
values:
- amd64
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: quay.io/coreos/flannel:v0.11.0-amd64
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
image: quay.io/coreos/flannel:v0.11.0-amd64
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-arm64
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: beta.kubernetes.io/os
operator: In
values:
- linux
- key: beta.kubernetes.io/arch
operator: In
values:
- arm64
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: quay.io/coreos/flannel:v0.11.0-arm64
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
image: quay.io/coreos/flannel:v0.11.0-arm64
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-arm
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: beta.kubernetes.io/os
operator: In
values:
- linux
- key: beta.kubernetes.io/arch
operator: In
values:
- arm
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: quay.io/coreos/flannel:v0.11.0-arm
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
image: quay.io/coreos/flannel:v0.11.0-arm
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-ppc64le
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: beta.kubernetes.io/os
operator: In
values:
- linux
- key: beta.kubernetes.io/arch
operator: In
values:
- ppc64le
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: quay.io/coreos/flannel:v0.11.0-ppc64le
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
image: quay.io/coreos/flannel:v0.11.0-ppc64le
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-s390x
namespace: kube-system
labels:
tier: node
app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: beta.kubernetes.io/os
operator: In
values:
- linux
- key: beta.kubernetes.io/arch
operator: In
values:
- s390x
hostNetwork: true
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni
image: quay.io/coreos/flannel:v0.11.0-s390x
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
image: quay.io/coreos/flannel:v0.11.0-s390x
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
EOF
$ kubectl apply -f kube-flannel.yml
podsecuritypolicy.policy/psp.flannel.unprivileged created
Warning: rbac.authorization.k8s.io/v1beta1 ClusterRole is deprecated in v1.17+, unavailable in v1.22+; use rbac.authorization.k8s.io/v1 ClusterRole
clusterrole.rbac.authorization.k8s.io/flannel created
Warning: rbac.authorization.k8s.io/v1beta1 ClusterRoleBinding is deprecated in v1.17+, unavailable in v1.22+; use rbac.authorization.k8s.io/v1 ClusterRoleBinding
clusterrolebinding.rbac.authorization.k8s.io/flannel created
serviceaccount/flannel created
configmap/kube-flannel-cfg created
daemonset.apps/kube-flannel-ds-amd64 created
daemonset.apps/kube-flannel-ds-arm64 created
daemonset.apps/kube-flannel-ds-arm created
daemonset.apps/kube-flannel-ds-ppc64le created
daemonset.apps/kube-flannel-ds-s390x created
$ kubectl get pods -n kube-system # 刚敲完命令为init状态，需要等待会儿
NAME READY STATUS RESTARTS AGE
kube-flannel-ds-amd64-7k86t 1/1 Running 0 58s
$ kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-m1 Ready <none> 17m v1.19.16
部署好网络插件，Node准备就绪。
7.6 授权apiserver访问kubelet
cat > apiserver-to-kubelet-rbac.yaml << EOF
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
- pods/log
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: kubernetes
EOF
$ kubectl apply -f apiserver-to-kubelet-rbac.yaml
clusterrole.rbac.authorization.k8s.io/system:kube-apiserver-to-kubelet created
clusterrolebinding.rbac.authorization.k8s.io/system:kube-apiserver created
7.7 新增加Worker Node
（1）拷贝已部署好的Node相关文件到新节点
在master节点将Worker Node涉及文件拷贝到新节点192.168.1.148
scp -r /opt/kubernetes root@192.168.1.148:/opt/
scp -r /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.1.148:/usr/lib/systemd/system
scp -r /opt/cni/ root@192.168.1.148:/opt/
scp /opt/kubernetes/ssl/ca.pem root@192.168.1.148:/opt/kubernetes/ssl
（2）删除kubelet证书和kubeconfig文件（在k8s-n1上执行）
rm /opt/kubernetes/cfg/kubelet.kubeconfig
rm -f /opt/kubernetes/ssl/kubelet*
注：这几个文件是证书申请审批后自动生成的，每个Node不同，必须删除重新生成。
（3）修改主机名（在k8s-n1上执行）
vi /opt/kubernetes/cfg/kubelet.conf
--hostname-override=k8s-n1
vi /opt/kubernetes/cfg/kube-proxy-config.yml
hostnameOverride: k8s-n1
（4）启动并设置开机启动（在k8s-n1上执行）
systemctl daemon-reload
systemctl start kubelet
systemctl enable kubelet
systemctl start kube-proxy
systemctl enable kube-proxy
# 确认状态正常
$ systemctl status kubelet
● kubelet.service - Kubernetes Kubelet
Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2022-01-31 21:17:46 EST; 13s ago
Main PID: 3121 (kubelet)
CGroup: /system.slice/kubelet.service
└─3121 /opt/kubernetes/bin/kubelet --logtostderr=false --v=2 --log-dir=/opt/kubernetes/logs --hostname-override=k8s-n1 --...
Jan 31 21:17:46 k8s-n1 systemd[1]: Started Kubernetes Kubelet.
Jan 31 21:17:46 k8s-n1 systemd[1]: Starting Kubernetes Kubelet...
$ systemctl status kube-proxy
● kube-proxy.service - Kubernetes Proxy
Loaded: loaded (/usr/lib/systemd/system/kube-proxy.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2022-01-31 21:17:52 EST; 20s ago
Main PID: 3153 (kube-proxy)
CGroup: /system.slice/kube-proxy.service
└─3153 /opt/kubernetes/bin/kube-proxy --logtostderr=false --v=2 --log-dir=/opt/kubernetes/logs --config=/opt/kubernetes/c...
Jan 31 21:17:52 k8s-n1 systemd[1]: Started Kubernetes Proxy.
Jan 31 21:17:52 k8s-n1 systemd[1]: Starting Kubernetes Proxy...
Jan 31 21:17:52 k8s-n1 kube-proxy[3153]: E0131 21:17:52.550194 3153 node.go:125] Failed to retrieve node info: nodes "k8s-...t found
Jan 31 21:17:53 k8s-n1 kube-proxy[3153]: E0131 21:17:53.747923 3153 node.go:125] Failed to retrieve node info: nodes "k8s-...t found
Jan 31 21:17:55 k8s-n1 kube-proxy[3153]: E0131 21:17:55.805336 3153 node.go:125] Failed to retrieve node info: nodes "k8s-...t found
Jan 31 21:18:00 k8s-n1 kube-proxy[3153]: E0131 21:18:00.123071 3153 node.go:125] Failed to retrieve node info: nodes "k8s-...t found
Jan 31 21:18:09 k8s-n1 kube-proxy[3153]: E0131 21:18:09.223578 3153 node.go:125] Failed to retrieve node info: nodes "k8s-...t found
Hint: Some lines were ellipsized, use -l to show in full.
（5）在Master上批准新Node kubelet证书申请
$ kubectl get csr
NAME AGE SIGNERNAME REQUESTOR CONDITION
node-csr-R17zXNtPU2ozsmqePPT3LnsV1KJs2wh2OCmpdHQS-r4 46s kubernetes.io/kube-apiserver-client-kubelet kubelet-bootstrap Pending
node-csr-mJUDZWs1ZgjeMxO5cKHmN93miRvt-aVFHE25fmcfEC0 20m kubernetes.io/kube-apiserver-client-kubelet kubelet-bootstrap Approved,Issued
$ kubectl certificate approve node-csr-R17zXNtPU2ozsmqePPT3LnsV1KJs2wh2OCmpdHQS-r4
certificatesigningrequest.certificates.k8s.io/node-csr-R17zXNtPU2ozsmqePPT3LnsV1KJs2wh2OCmpdHQS-r4 approved
（6）查看Node状态
$ kubectl get node # 敲完命令后要等待下，k8s-n1才会Ready
NAME STATUS ROLES AGE VERSION
k8s-m1 Ready <none> 22m v1.19.16
k8s-n1 Ready <none> 41s v1.19.16
测试kubernetes集群
在Kubernetes集群中创建一个pod，验证是否正常运行：
$ kubectl create deployment nginx --image=nginx
deployment.apps/nginx created
$ kubectl expose deployment nginx --port=80 --type=NodePort
service/nginx exposed
$ kubectl get pod,svc
NAME READY STATUS RESTARTS AGE
pod/nginx-6799fc88d8-qfpwf 0/1 ContainerCreating 0 10s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.0.0.1 <none> 443/TCP 31m
service/nginx NodePort 10.0.0.231 <none> 80:31931/TCP 4s
访问任一节点地址的31931端口：如
http://192.168.1.148:31931，出现如下图片所示则表示访问成功。
\
