|NO.Z.00100|——————————|^^ 升级 ^^|——|KuberNetes&二进制升级.V11|——|kubernetes_Master|kubelet.v1.17.0——>v1.19.5|

一、kubernetes升级kubelet.v1.17.0——>v1.19.5

### --- 下线kubernetes.node节点：k8s-master01
~~~     # 下线node节点k8s-master01：把k8s-master01设置成不可调度状态
~~~     注：--delete-local-data：将本地数据删除掉
~~~     注：--ignore-daemonsets：将daemonsets忽略掉； 在创建daemonsets容器的时候会给pod打一个标签，ischeduling的一个标签
~~~     注：drain：也是给node节点的ischeduling标签，master02有这个标签，而--ignore-daemonsets容忍了这个标签，它会一直在上面运行，变成死循环，所以把daemonset忽略掉
~~~     注：绑定节点，不用去漂移，直接重启即可。

[root@k8s-master01 ~]# kubectl drain k8s-master01 --delete-local-data --force --ignore-daemonsets
node/k8s-master01 cordoned

### --- 查看节点的状态
~~~     注：k8s-master02处于不可调度状态

[root@k8s-master01 ~]# kubectl get node
NAME           STATUS                     ROLES    AGE   VERSION
k8s-master01   Ready,SchedulingDisabled   <none>   54d   v1.17.0
k8s-master02   Ready                      <none>   54d   v1.17.0
k8s-master03   Ready                      <none>   54d   v1.17.0
k8s-node01     Ready                      <none>   54d   v1.17.0
k8s-node02     Ready                      <none>   54d   v1.17.0

### --- 查看k8s-master02上是否运行容器
~~~     注：k8s-master01节点的pod全部驱逐

[root@k8s-master01 ~]# kubectl get po --all-namespaces -owide
NAMESPACE              NAME                                         READY   STATUS    RESTARTS   AGE     IP              NODE           NOMINATED NODE   READINESS GATES
default                busybox                                      1/1     Running   33         54d     172.18.195.39   k8s-master03   <none>           <none>
default                demo-nginx-6bdcdcc585-f574t                  2/2     Running   0          2m38s   172.18.195.43   k8s-master03   <none>           <none>
default                demo-nginx-6bdcdcc585-z9h5r                  2/2     Running   2          3d      172.25.92.115   k8s-master02   <none>           <none>
default                nginx-78658dcf78-87gqv                       2/2     Running   12         3d      172.18.195.40   k8s-master03   <none>           <none>
default                nginx-78658dcf78-v98kz                       2/2     Running   26         3d2h    172.25.92.116   k8s-master02   <none>           <none>

二、kubernetes.node节点升级kubelet：k8s-master01

### --- 查看kubelet版本

[root@k8s-master01 ~]# /usr/local/bin/kubelet --version
Kubernetes v1.17.0

### --- 停止运行kubelet服务

[root@k8s-master01 ~]# systemctl stop kubelet

### --- 备份kubelet服务

[root@k8s-master01 ~]# which kubelet
/usr/local/bin/kubelet
[root@k8s-master01 ~]# mkdir /usr/local/bin/kubelet.bak
[root@k8s-master01 ~]# cp /usr/local/bin/kubelet /usr/local/bin/kubelet.bak/

### --- 升级kubelet服务

[root@k8s-master01 ~]# cp -rp upgrade/master/kubernetes/server/bin/kubelet /usr/local/bin/
cp: overwrite ‘/usr/local/bin/kubelet’? y

### --- 查看kubelet版本

[root@k8s-node01 ~]# /usr/local/bin/kube-proxy --version
Kubernetes v1.19.5

### --- 启动kubelet服务

[root@k8s-master01 ~]# systemctl daemon-reload
[root@k8s-master01 ~]# systemctl restart kubelet

三、将kubernetes.node节点k8s-master01加入到集群中

### --- 上线node节点k8s-master01加入到集群中

[root@k8s-master01 ~]# kubectl uncordon k8s-master01
node/k8s-master01 uncordoned

### --- 查看kubernetes集群kubelet版本
~~~     注：k8s-master01版本的kubelet版本为v1.19.5，其它节点版本号没有发生变化 

[root@k8s-master01 ~]# kubectl get node
NAME           STATUS   ROLES    AGE   VERSION
k8s-master01   Ready    <none>   54d   v1.19.5
k8s-master02   Ready    <none>   54d   v1.17.0
k8s-master03   Ready    <none>   54d   v1.17.0
k8s-node01     Ready    <none>   54d   v1.17.0
k8s-node02     Ready    <none>   54d   v1.17.0

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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