二进制部署K8s集群第11节Node节点之kubelet部署

二进制部署K8s集群第11节Node节点之kubelet部署

目录1、架构2、创建生成kubelet服务端证书csr的json配置文件3、生成拷贝kubelet证书文件4、下载pause镜像打tab5、创建kubeconfig配置6、拷贝配置7、创建资源配置文件8、应用查看资源配置9、创建kubelet启动脚本10、创建supervisor配置11、启动检查打标签

2、创建生成kubelet服务端证书csr的json配置文件在hdss7-200.host.com上操作

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

3、生成拷贝kubelet证书文件

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/

4、下载pause镜像打tabkubelet利用pause镜像给容器建UTS\NET\IPC

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

5、创建kubeconfig配置在hdss7-21.host.com上操作5.1 set-cluster

cd /opt/kubernetes/server/bin/conf kubectl config set-cluster myk8s \ --certificate-authority=/opt/kubernetes/server/bin/certs/ca.pem \ --embed-certs=true \ --server=\ --kubeconfig=kubelet.kubeconfig

5.2 set-credentials

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-context

kubectl config set-context myk8s-context \ --cluster=myk8s \ --user=k8s-node \ --kubeconfig=kubelet.kubeconfig

5.4 use-context

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

6、拷贝配置scp kubelet.kubeconfig hdss7-22:/opt/kubernetes/server/bin/conf/7、创建资源配置文件

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

8、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etcd9、创建kubelet启动脚本以hdss7-21操作为例，hdss7-22操作类似配置不同地方 --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

10、创建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

配置不同地方 [program:kube-kubelet-7-21]11、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

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