k8s集群部署七（部署Node节点组件）

╰半橙微兮° 2022-01-13 13:01 511阅读 0赞

[2019独角兽企业重金招聘Python工程师标准>>> ][2019_Python_] ![hot3.png][]

在master节点执行命令

\# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap

将之前生成的kubeconfig文件以及pem证书拷贝到两台Node节点上。

cd /opt/kubernetes/ssl

scp \*.kubeconfig root[@host1][host1]:/opt/kubernetes/cfg/

scp \*.kubeconfig root@host2:/opt/kubernetes/cfg/

scp \*.pem root[@host1][host1]:/opt/kubernetes/ssl/

scp \*.pem root@host2:/opt/kubernetes/ssl/

将kubernetes-server-linux-amd64.tar.gz上传到两台node节点上，解压（Node节点执行以下操作）

tar -xzvf kubernetes-server-linux-amd64.tar.gz

cd kubernetes/server/bin

mv kubelet kube-proxy /opt/kubernetes/bin/

拉取谷歌容器的阿里云镜像，并标记

docker pull registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0

docker tag registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0 pause-amd64:3.0

创建kubelet.sh脚本

touch kubelet.sh

vim kubelet.sh

内容如下

\#!/bin/bash

NODE\_ADDRESS=$\{1:-"172.18.98.47"\}  
DNS\_SERVER\_IP=$\{2:-"10.10.10.2"\}

cat <<EOF >/opt/kubernetes/cfg/kubelet

KUBELET\_OPTS="--logtostderr=true \\\\  
\--v=4 \\\\  
\--address=$\{NODE\_ADDRESS\} \\\\  
\--hostname-override=$\{NODE\_ADDRESS\} \\\\  
\--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \\\\  
\--experimental-bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \\\\  
\--cert-dir=/opt/kubernetes/ssl \\\\  
\--allow-privileged=true \\\\  
\--cluster-dns=$\{DNS\_SERVER\_IP\} \\\\  
\--cluster-domain=cluster.local \\\\  
\--fail-swap-on=false \\\\  
\--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"

EOF

cat <<EOF >/usr/lib/systemd/system/kubelet.service  
\[Unit\]  
Description=kubernetes kubelet  
Documentation=https://github.com/GoogleCloudPlatform/kubernetes  
After=docker.service  
Requires=docker.service

\[Service\]  
EnvironmentFile=-/opt/kubernetes/cfg/kubelet  
ExecStart=/opt/kubernetes/bin/kubelet \\$KUBELET\_OPTS  
Restart=on-failure

\[Install\]  
WantedBy=multi-user.target  
EOF

systemctl daemon-reload  
systemctl enable kubelet  
systemctl restart kubelet

保存退出

chmod 755 kubelet.sh

在host1上执行

\# ./kubelet.sh 172.18.98.46 10.10.10.2

在host2上执行

\# ./kubelet.sh 172.18.98.47 10.10.10.2

此时在/opt/kubernetes/cfg目录下生成了kubelet文件，在/usr/lib/systemd/system目录下生成了kubelet.service文件

查看kubelet文件

\# cat /opt/kubernetes/cfg/kubelet

KUBELET\_OPTS="--logtostderr=true \\  
\--v=4 \\  
\--address=172.18.98.47 \\  
\--hostname-override=172.18.98.47 \\  
\--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \\  
\--experimental-bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \\  
\--cert-dir=/opt/kubernetes/ssl \\  
\--allow-privileged=true \\  
\--cluster-dns=10.10.10.2 \\  
\--cluster-domain=cluster.local \\  
\--fail-swap-on=false \\  
\--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"

查看kubelet.service文件

\# cat /usr/lib/systemd/system/kubelet.service  
\[Unit\]  
Description=kubernetes kubelet  
Documentation=https://github.com/GoogleCloudPlatform/kubernetes  
After=docker.service  
Requires=docker.service

\[Service\]  
EnvironmentFile=-/opt/kubernetes/cfg/kubelet  
ExecStart=/opt/kubernetes/bin/kubelet $KUBELET\_OPTS  
Restart=on-failure

\[Install\]  
WantedBy=multi-user.target

查看进程

\# ps -ef | grep kubelet  
root      2579     1  0 17:05 ?        00:00:00 /opt/kubernetes/bin/kubelet --logtostderr=true --v=4 --address=172.18.98.47 --hostname-override=172.18.98.47 --kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig --experimental-bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig --cert-dir=/opt/kubernetes/ssl --allow-privileged=true --cluster-dns=10.10.10.2 --cluster-domain=cluster.local --fail-swap-on=false --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0

此时如果我们查看/opt/kubernetes/cfg目录下，kubelet.kubeconfig并没有自动生成，它是去请求master节点的证书。

创建proxy.sh文件

touch proxy.sh

vim proxy.sh

内容如下

\#!/bin/bash

NODE\_ADDRESS=$\{1:-"172.18.98.47"\}

cat <<EOF >/opt/kubernetes/cfg/kube-proxy

KUBE\_PROXY\_OPTS="--logtostderr=true \\  
\--v=4 \\  
\--hostname-override=$\{NODE\_ADDRESS\} \\  
\--kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"

EOF

cat <<EOF >/usr/lib/systemd/system/kube-proxy.service  
\[Unit\]  
Description=Kubernetes Proxy  
After=network.target

\[Service\]  
EnvironmentFile=-/opt/kubernetes/cfg/kube-proxy  
ExecStart=/opt/kubernetes/bin/kube-proxy \\$KUBE\_PROXY\_OPTS  
Restart=on-failure

\[Install\]  
WantedBy=multi-user.target  
EOF

systemctl daemon-reload  
systemctl enable kube-proxy  
systemctl restart kube-proxy

保存退出

chmod 755 proxy.sh

在host1上执行

\# ./proxy.sh 172.18.98.46

在host2上执行

\# ./proxy.sh 172.18.98.47

此时在/opt/kubernetes/cfg目录下生成了kube-proxy文件，在/usr/lib/systemd/system目录下生成了kube-proxy.service文件

查看kube-proxy文件

\# cat /opt/kubernetes/cfg/kube-proxy

KUBE\_PROXY\_OPTS="--logtostderr=true --v=4 --hostname-override=172.18.98.47 --kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"

查看kube-proxy.service文件

\# cat /usr/lib/systemd/system/kube-proxy.service  
\[Unit\]  
Description=Kubernetes Proxy  
After=network.target

\[Service\]  
EnvironmentFile=-/opt/kubernetes/cfg/kube-proxy  
ExecStart=/opt/kubernetes/bin/kube-proxy $KUBE\_PROXY\_OPTS  
Restart=on-failure

\[Install\]  
WantedBy=multi-user.target

查看进程

\# ps -ef | grep kube-proxy  
root      7124     1  0 Jul31 ?        00:00:02 /opt/kubernetes/bin/kube-proxy --logtostderr=true --v=4 --hostname-override=172.18.98.47 --kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig

回到master节点，查看证书请求

\# kubectl get csr  
NAME                                                   AGE       REQUESTOR           CONDITION  
node-csr-DIASnublUtulGXj7P\_z2XpevnJEp-177uMc5KQsrNVQ   21m       kubelet-bootstrap   Pending  
node-csr-jQX9fAR6GyMX3ZhQDEsgtqIoCDbnUhfMo5uyPXvZDVQ   57m       kubelet-bootstrap   Pending  
node-csr-naQV18GOsLRXbyMETuZdYKPMHVudpPl93-JNPMVTIVo   1h        kubelet-bootstrap   Pending

我们将这些证书请求通过

\# kubectl certificate approve node-csr-jQX9fAR6GyMX3ZhQDEsgtqIoCDbnUhfMo5uyPXvZDVQ  
certificatesigningrequest "node-csr-jQX9fAR6GyMX3ZhQDEsgtqIoCDbnUhfMo5uyPXvZDVQ" approved

全部通过后，再次查看证书请求，大概如下所示

\# kubectl get csr  
NAME                                                   AGE       REQUESTOR           CONDITION  
node-csr-DIASnublUtulGXj7P\_z2XpevnJEp-177uMc5KQsrNVQ   42m       kubelet-bootstrap   Approved,Issued  
node-csr-e1wUzGmd2huMv0aTfH35rZtm47opoOd8pcjZjUmZdnw   20m       kubelet-bootstrap   Approved,Issued  
node-csr-jQX9fAR6GyMX3ZhQDEsgtqIoCDbnUhfMo5uyPXvZDVQ   1h        kubelet-bootstrap   Approved,Issued

我们回到node节点上，查看/opt/kubernetes/ssl下面的文件

\# ll  
total 64  
\-rw------- 1 root root 1675 Feb 20 16:58 admin-key.pem  
\-rw-r--r-- 1 root root 1277 Feb 20 16:58 admin.pem  
\-rw------- 1 root root 2188 Feb 20 16:58 bootstrap.kubeconfig  
\-rw------- 1 root root 1679 Feb 20 16:58 ca-key.pem  
\-rw-r--r-- 1 root root 1359 Feb 20 16:58 ca.pem  
\-rwxr-xr-x 1 root root 1498 Feb 20 16:58 kubeconfig.sh  
\-rw-r--r-- 1 root root 1046 Feb 20 18:30 kubelet-client.crt  
\-rw------- 1 root root  227 Feb 20 18:02 kubelet-client.key  
\-rw-r--r-- 1 root root 1111 Feb 20 15:13 kubelet.crt  
\-rw------- 1 root root 1675 Feb 20 15:13 kubelet.key  
\-rw------- 1 root root 1679 Feb 20 16:58 kube-proxy-key.pem  
\-rw------- 1 root root 6294 Feb 20 16:58 kube-proxy.kubeconfig  
\-rw-r--r-- 1 root root 1403 Feb 20 16:58 kube-proxy.pem  
\-rw------- 1 root root 1679 Feb 20 16:58 server-key.pem  
\-rw-r--r-- 1 root root 1602 Feb 20 16:58 server.pem

会多出诸如kubelet-client.crt，kubelet-client.key的文件，再查看/opt/kubernetes/cfg

会发现此时已经生成了kubelet.kubeconfig

\# ll  
total 32  
\-rw------- 1 root root 2188 Feb 20 14:41 bootstrap.kubeconfig  
\-rw-r--r-- 1 root root  502 Feb 16 16:45 etcd  
\-rw-r--r-- 1 root root  248 Feb 18 15:40 flanneld  
\-rw-r--r-- 1 root root  477 Feb 20 17:05 kubelet  
\-rw------- 1 root root 2279 Feb 20 18:30 kubelet.kubeconfig  
\-rw-r--r-- 1 root root  133 Feb 20 18:03 kube-proxy  
\-rw------- 1 root root 6294 Feb 20 14:41 kube-proxy.kubeconfig

再回到master节点上，查看集群信息

\# kubectl get node  
NAME           STATUS    ROLES     AGE       VERSION  
172.18.98.46   Ready     <none>    15m       v1.9.2  
172.18.98.47   Ready     <none>    21m       v1.9.2

\# kubectl get cs  
NAME                 STATUS    MESSAGE              ERROR  
controller-manager   Healthy   ok                     
scheduler            Healthy   ok                     
etcd-0               Healthy   \{"health": "true"\}     
etcd-2               Healthy   \{"health": "true"\}     
etcd-1               Healthy   \{"health": "true"\}

现在master以及node全部就绪了，整个集群部署完成。

转载于:https://my.oschina.net/u/3768341/blog/3012620

[2019_Python_]: https://my.oschina.net/u/2663968/blog/3061697
[hot3.png]: /images/20220113/da947cb26cdd4e9882b740cabdba5683.png
[host1]: https://my.oschina.net/host1