kubernetes 1.21 版本升级

1. 规划

升级前：

组件名称	位置	版本
kube-apiserver	/usr/bin/kube-apiserver	v1.21.13
etcd、etcdctl	/usr/bin/etcd、/usr/bin/etcdctl	3.5.4
kube-controller-manager	/usr/bin/kube-controller-manager	v1.21.13
kube-scheduler	/usr/bin/kube-scheduler	v1.21.13
docker	/usr/bin/docker	20.10.21
kubelet	/usr/bin/kubelet	v1.21.13
kube-proxy	/usr/bin/kube-proxy	v1.21.13
cni	/opt/cni/bin/	v1.1.1
Calico	容器部署	v3.22
coredns	容器部署	1.6.2

升级后：

组件名称	位置	版本
kube-apiserver	/usr/bin/kube-apiserver	v1.22.10
etcd、etcdctl	/usr/bin/etcd、/usr/bin/etcdctl	3.5.4
kube-controller-manager	/usr/bin/kube-controller-manager	v1.22.10
kube-scheduler	/usr/bin/kube-scheduler	v1.22.10
docker	/usr/bin/docker	20.10.21
kubelet	/usr/bin/kubelet	v1.22.10
kube-proxy	/usr/bin/kube-proxy	v1.22.10
cni	/opt/cni/bin/	v1.1.1
Calico	容器部署	v3.22
coredns	容器部署	1.6.2

这里主要升级kubernetes主要组件：kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy，其余的不需要进行升级，在升级时最好是一个高可用的集群，master01升级时api-server迁移到其他master节点进行调度。

2. master节点

mkdir -p $HOME/k8s-install && cd $HOME/k8s-install

# 准备二进制包
K8S_VERSION="v1.22.10"
wget https://dl.k8s.io/$K8S_VERSION/kubernetes-server-linux-amd64.tar.gz
tar zxvf kubernetes-server-linux-amd64.tar.gz

# 停掉master01中的 kube-apiserver kube-scheduler kube-controller-manager kubectl kubelet kube-proxy
systemctl stop kube-apiserver
systemctl stop kube-scheduler
systemctl stop kube-controller-manager
systemctl stop kubelet
systemctl stop kube-proxy



cd kubernetes/server/bin
cp kube-apiserver kube-scheduler kube-controller-manager kubectl kubelet kube-proxy /usr/bin

# 启动服务
systemctl restart kube-apiserver
systemctl restart kube-scheduler
systemctl restart kube-controller-manager
systemctl restart kubelet
systemctl restart kube-proxy

# 查看启动情况
# systemctl status kube-apiserver
# systemctl status kube-scheduler
# systemctl status kube-controller-manager
# systemctl status kubelet
# systemctl status kube-proxy

3. node节点

# node节点操作
systemctl stop kubelet
systemctl stop kube-proxy

# master01节点操作
scp kubectl kubelet kube-proxy root@k8s-node01:/usr/bin
scp kubectl kubelet kube-proxy root@k8s-node02:/usr/bin

# node节点重启
systemctl restart kubelet
systemctl restart kube-proxy

kubectl get node
NAME           STATUS   ROLES    AGE   VERSION
k8s-master01   Ready    master   36h   v1.22.10
k8s-node01     Ready    node     21h   v1.22.10
k8s-node02     Ready    node     21h   v1.22.10