0、简介
这里只用3台服务器来做一个简单的集群，当前版本是1.23.17目标升级到1.24.17
| 地址 | 主机名 |
| 192.168.160.40 | kuber-master-1 |
| 192.168.160.41 | kuber-master-2 |
| 192.168.160.42 | kuber-node-1 |
我这里设置的master2可调度pod，将master2的污点去掉
kubectl describe nodes node | grep Taint
kubectl taint nodes kuber-master-2 node-role.kubernetes.io/master:NoSchedule-
版本对应关系
containerd对应
https://containerd.io/releases/
ingress对应
https://github.com/kubernetes/ingress-nginx
当前ingress1.4.0，先升级集群到1.25
升级ingress到1.9.6，升级集群到1.30
升级ingress到1.12.1
calico对应
System requirements | Calico Documentation
升级calico到3.24
1、升级calico
这里旧版本的calico是3.20，先升级到3.24版本。
curl https://raw.githubusercontent.com/projectcalico/calico/v3.24.5/manifests/calico.yaml -o calico.yaml
下载3.24版本，直接进行apply操作，会对旧版本覆盖。
kubectl apply -f calico.yam
2、升级k8s版本--master执行
（1）升级kubeadm
yum install -y kubeadm-1.24.17-0 --disableexcludes=kubernetes
kubeadm version 查看当前kubeadm的版本
（2）查看执行计划
kubeadm upgrade plan
（3）修改runtime
kubectl edit nodes kuber-master-1
将
kubeadm.alpha.kubernetes.io/cri-socket: /var/run/dockershim.sock
修改为
kubeadm.alpha.kubernetes.io/cri-socket: unix:///var/run/containerd/containerd.sock
（4）配置containerd修改默认Cgroup驱动
containerd config default > /etc/containerd/config.toml
sed -i 's#SystemdCgroup = false#SystemdCgroup = true#g' /etc/containerd/config.toml
vim /var/lib/kubelet/kubeadm-flags.env
KUBELET_KUBEADM_ARGS="--network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.6"
修改为
KUBELET_KUBEADM_ARGS="--pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.6 --container-runtime=remote --container-runtime-endpoint=unix:///run/containerd/containerd.sock"
systemctl daemon-reload
systemctl restart containerd #重启containerd
systemctl restart kubelet #重启kubelet
（5）定义 crictl 如何连接到容器运行时
cat >/etc/crictl.yaml<<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF
# 加载
systemctl daemon-reload
systemctl restart containerd
（6）开始升级
kubeadm upgrade apply v1.24.17
（7）升级kubelet和kubectl
kubectl drain k8s-master01 --ignore-daemonsets
yum -y install kubelet-1.24.17 kubectl-1.24.17
systemctl daemon-reload
systemctl restart kubelet
kubectl uncordon k8s-master01
（8）升级其他控制节点
不需要执行kubeadm upgrade plan
kubeadm upgrade node
替换 kubeadm upgrade apply
其他流程一样。
3、升级k8s版本--node执行
yum -y install kubeadm-1.24.17
驱逐node上的pod
kubectl drain k8s-node-01 --ignore-daemonsets
同master一样修改运行时和配置
做完1-5步就行
kubeadm upgrade node
升级kubelet和kubectl
kubectl drain k8s-node-01 --ignore-daemonsets
yum -y install kubelet-1.24.17 kubectl-1.24.17
systemctl daemon-reload
systemctl restart kubelet
kubectl uncordon k8s-node-01
