二进制部署K8s集群第11节Node节点之kubelet部署
上一章：二进制部署K8s集群第10节Master节点之部署四层反向代理
架构图
node
目录
一、架构
二、建立生成kubelet服务端证书csr的json配置文件
三、生成拷贝kubelet证书文件
四、下载pause镜像打tab
五、建立kubeconfig配置
六、拷贝配置
七、建立资源配置文件
八、应用查看资源配置
九、建立kubelet启动脚本
十、建立supervisor配置
十一、启动检查打标签docker
一、架构json
二、建立生成kubelet服务端证书csr的json配置文件
在hdss7-200.host.com上操做api
cd /opt/certs/
cat > kubelet-csr.json <<eof
{
"CN": "k8s-kubelet",
"hosts": [
"127.0.0.1",
"10.4.7.10",
"10.4.7.21",
"10.4.7.22",
"10.4.7.23",
"10.4.7.24",
"10.4.7.25",
"10.4.7.26",
"10.4.7.27",
"10.4.7.28"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
eof
三、生成拷贝kubelet证书文件架构
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server kubelet-csr.json | cfssl-json -bare kubelet ll kubelet* -rw-r--r--. 1 root root 1115 9月 20 19:24 kubelet.csr -rw-r--r--. 1 root root 452 9月 20 19:24 kubelet-csr.json -rw-------. 1 root root 1675 9月 20 19:24 kubelet-key.pem -rw-r--r--. 1 root root 1472 9月 20 19:24 kubelet.pem scp kubelet-key.pem kubelet.pem hdss7-21:/opt/kubernetes/server/bin/certs/ scp kubelet-key.pem kubelet.pem hdss7-22:/opt/kubernetes/server/bin/certs/
四、下载pause镜像打tab
kubelet利用pause镜像给容器建UTS\NET\IPCdom
docker pull kubernetes/pause docker images | grep pause kubernetes/pause latest f9d5de079539 6 years ago 240kB docker tag f9d5de079539 harbor.od.com/public/pause:latest docker login harbor.od.com # 用户名admin,密码Harbor12345 docker push harbor.od.com/public/pause:latest
五、建立kubeconfig配置
在hdss7-21.host.com上操做
5.1 set-clusteride
cd /opt/kubernetes/server/bin/conf kubectl config set-cluster myk8s \ --certificate-authority=/opt/kubernetes/server/bin/certs/ca.pem \ --embed-certs=true \ --server=https://10.4.7.10:7443 \ --kubeconfig=kubelet.kubeconfig
5.2 set-credentialsui
kubectl config set-credentials k8s-node \ --client-certificate=/opt/kubernetes/server/bin/certs/client.pem \ --client-key=/opt/kubernetes/server/bin/certs/client-key.pem \ --embed-certs=true \ --kubeconfig=kubelet.kubeconfig
5.3 set-contextthis
kubectl config set-context myk8s-context \ --cluster=myk8s \ --user=k8s-node \ --kubeconfig=kubelet.kubeconfig
5.4 use-contextpwa
kubectl config use-context myk8s-context --kubeconfig=kubelet.kubeconfig ll 总用量 12 -rw-r--r--. 1 root root 2223 9月 20 03:01 audit.yaml -rw-------. 1 root root 6231 9月 20 19:51 kubelet.kubeconfig
六、拷贝配置scp kubelet.kubeconfig hdss7-22:/opt/kubernetes/server/bin/conf/
七、建立资源配置文件
cat > k8s-node.yaml <<eof apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: k8s-node roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:node subjects: - apiGroup: rbac.authorization.k8s.io kind: User name: k8s-node eof
八、应用查看资源配置
kubectl create -f k8s-node.yaml kubectl get clusterrolebinding k8s-node kubectl get clusterrolebinding k8s-node -o yaml
应用资源配置则会上传数据到etcd
九、建立kubelet启动脚本
以hdss7-21操做为例，hdss7-22操做相似
配置不一样地方 --hostname-override
cat > /opt/kubernetes/server/bin/kubelet.sh <<eof #!/bin/sh ./kubelet \ --anonymous-auth=false \ --cgroup-driver systemd \ --cluster-dns 192.168.0.2 \ --cluster-domain cluster.local \ --runtime-cgroups=/systemd/system.slice \ --kubelet-cgroups=/systemd/system.slice \ --fail-swap-on="false" \ --client-ca-file ./certs/ca.pem \ --tls-cert-file ./certs/kubelet.pem \ --tls-private-key-file ./certs/kubelet-key.pem \ --hostname-override hdss7-21.host.com \ --image-gc-high-threshold 20 \ --image-gc-low-threshold 10 \ --kubeconfig ./conf/kubelet.kubeconfig \ --log-dir /data/logs/kubernetes/kube-kubelet \ --pod-infra-container-image harbor.od.com/public/pause:latest \ --root-dir /data/kubelet eof chmod +x /opt/kubernetes/server/bin/kubelet.sh mkdir -p /data/logs/kubernetes/kube-kubelet /data/kubelet
十、建立supervisor配置
cat > /etc/supervisord.d/kube-kubelet.ini <<eof [program:kube-kubelet-7-21] command=/opt/kubernetes/server/bin/kubelet.sh ; the program (relative uses PATH, can take args) numprocs=1 ; number of processes copies to start (def 1) directory=/opt/kubernetes/server/bin ; directory to cwd to before exec (def no cwd) autostart=true ; start at supervisord start (default: true) autorestart=true ; retstart at unexpected quit (default: true) startsecs=30 ; number of secs prog must stay running (def. 1) startretries=3 ; max # of serial start failures (default 3) exitcodes=0,2 ; 'expected' exit codes for process (default 0,2) stopsignal=QUIT ; signal used to kill process (default TERM) stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10) user=root ; setuid to this UNIX account to run the program redirect_stderr=true ; redirect proc stderr to stdout (default false) stdout_logfile=/data/logs/kubernetes/kube-kubelet/kubelet.stdout.log ; stderr log path, NONE for none; default AUTO stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB) stdout_logfile_backups=4 ; # of stdout logfile backups (default 10) stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0) stdout_events_enabled=false ; emit events on stdout writes (default false) eof
配置不一样地方 [program:kube-kubelet-7-21]
十一、启动检查打标签
supervisorctl update supervisorctl status kubectl get nodes kubectl label node hdss7-22.host.com node-role.kubernetes.io/node= kubectl label node hdss7-21.host.com node-role.kubernetes.io/node= kubectl label node hdss7-21.host.com node-role.kubernetes.io/master= kubectl label node hdss7-22.host.com node-role.kubernetes.io/master= kubectl get nodes