集群升级

升级 kubeadm 集群 |Kubernetes

yum仓库替换版本号，集群所有节点

sed -i 's/v1.32/v1.33/g' /etc/yum.repos.d/kubernetes.repo

Master节点

更新 kubeadm

yum install -y kubeadm-'1.33.4-*' --disableexcludes=kubernetes

检查升级计划

kubeadm upgrade plan

执行升级命令

kubeadm upgrade apply v1.33.4

[root@k8s-master ~]# kubeadm upgrade apply v1.33.4
[upgrade] Reading configuration from the "kubeadm-config" ConfigMap in namespace "kube-system"...
[upgrade] Use 'kubeadm init phase upload-config --config your-config-file' to re-upload it.
[upgrade/preflight] Running preflight checks
        [WARNING SystemVerification]: cgroups v1 support is in maintenance mode, please migrate to cgroups v2
[upgrade] Running cluster health checks
[upgrade/preflight] You have chosen to upgrade the cluster version to "v1.33.4"
[upgrade/versions] Cluster version: v1.32.6
[upgrade/versions] kubeadm version: v1.33.4
[upgrade] Are you sure you want to proceed? [y/N]: y
。。。
[addons] Applied essential addon: CoreDNS
[addons] Applied essential addon: kube-proxy

[upgrade] SUCCESS! A control plane node of your cluster was upgraded to "v1.33.4".

[upgrade] Now please proceed with upgrading the rest of the nodes by following the right order.

yum install -y kubelet-'1.33.4-*' kubectl-'1.33.4-*' --disableexcludes=kubernetes

systemctl daemon-reload && systemctl restart kubelet

Worker 节点

yum install -y kubelet-'1.33.4-*' kubectl-'1.33.4-*' --disableexcludes=kubernetes

[root@k8s-master ~]# kubectl get nodes
NAME           STATUS   ROLES           AGE   VERSION
k8s-master     Ready    control-plane   65d   v1.33.4
k8s-worker-1   Ready    worker          65d   v1.32.6
k8s-worker-2   Ready    worker          65d   v1.32.6

kubeadm upgrade node

[root@k8s-worker-1 ~]# kubeadm upgrade node
[upgrade] Reading configuration from the "kubeadm-config" ConfigMap in namespace "kube-system"...
[upgrade] Use 'kubeadm init phase upload-config --config your-config-file' to re-upload it.
[upgrade/preflight] Running pre-flight checks
        [WARNING SystemVerification]: cgroups v1 support is in maintenance mode, please migrate to cgroups v2
[upgrade/preflight] Skipping prepull. Not a control plane node.
[upgrade/control-plane] Skipping phase. Not a control plane node.
[upgrade/kubeconfig] Skipping phase. Not a control plane node.
W0829 12:35:18.060987  102454 postupgrade.go:117] Using temporary directory /etc/kubernetes/tmp/kubeadm-kubelet-config3221878225 for kubelet config. To override it set the environment variable KUBEADM_UPGRADE_DRYRUN_DIR
[upgrade] Backing up kubelet config file to /etc/kubernetes/tmp/kubeadm-kubelet-config3221878225/config.yaml
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[upgrade/kubelet-config] The kubelet configuration for this node was successfully upgraded!
[upgrade/addon] Skipping the addon/coredns phase. Not a control plane node.
[upgrade/addon] Skipping the addon/kube-proxy phase. Not a control plane node.

shell
systemctl daemon-reload && systemctl restart kubelet

bash
[root@k8s-master ~]# kubectl get nodes
NAME           STATUS   ROLES           AGE   VERSION
k8s-master     Ready    control-plane   65d   v1.33.4
k8s-worker-1   Ready    worker          65d   v1.33.4
k8s-worker-2   Ready    worker          65d   v1.33.4