组件版本支持查询
https://kubernetes.io/docs/setup/release/notes/
查看版本
apt-cache madison kubelet apt-cache madison kubeadm apt-cache madison kubectl
升级v1.20.0-00版本
apt-get update && apt-get install -y --allow-change-held-packages kubeadm=1.20.1-00 apt-get install -y --allow-change-held-packages kubectl=1.20.1-00 apt-get install -y --allow-change-held-packages kubelet=1.20.1-00
显示镜像版本列表
root@master:~# kubeadm config images list k8s.gcr.io/kube-apiserver:v1.20.1 k8s.gcr.io/kube-controller-manager:v1.20.1 k8s.gcr.io/kube-scheduler:v1.20.1 k8s.gcr.io/kube-proxy:v1.20.1 k8s.gcr.io/pause:3.2 k8s.gcr.io/etcd:3.4.13-0 k8s.gcr.io/coredns:1.7.0
生成默认kubeadm.conf文件
kubeadm config print init-defaults > kubeadm.conf
绕过墙下载镜像方法
sed -i "s/imageRepository: .*/imageRepository: registry.aliyuncs.com\/google_containers/g" kubeadm.conf
下载需要用到的镜像
kubeadm config images pull --config kubeadm.conf
注意： 要停止所有kube-system的pod，否则下载镜像会自动删除
master初始化
kubeadm init --kubernetes-version=v1.20.1 --pod-network-cidr=172.22.0.0/16 --apiserver-advertise-address=192.168.211.40 kdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config scp /root/.kube/config root@192.168.211.41:/root/.kube/config scp /root/.kube/config root@192.168.211.42:/root/.kube/config
node1，node2初始化
kubeadm reset kubeadm join 192.168.211.40:6443 --token blduo0.676tzd2jndviqpeq \ > --discovery-token-ca-cert-hash sha256:8012b7c0a3d9fd13d5263ab97df3d49eff46afb1c10de413cc7322c8f9e00247
配置calico网络
kubectl apply -f https://docs.projectcalico.org/v3.16/manifests/calico.yaml
$ kubectl get nodes NAME STATUS ROLES AGE VERSION master Ready control-plane,master 158m v1.20.1 node1 Ready <none> 153m v1.20.1 node2 Ready <none> 153m v1.20.1 kubectl get pods -A NAMESPACE NAME READY STATUS RESTARTS AGE kube-system calico-kube-controllers-57fc9c76cc-cknk9 1/1 Running 0 97m kube-system calico-node-4b49f 1/1 Running 0 97m kube-system calico-node-m5hjk 1/1 Running 0 97m kube-system calico-node-t8k2g 1/1 Running 0 97m kube-system coredns-74ff55c5b-9k9pd 1/1 Running 0 158m kube-system coredns-74ff55c5b-jwm7b 1/1 Running 0 158m kube-system etcd-master 1/1 Running 0 158m kube-system kube-apiserver-master 1/1 Running 0 158m kube-system kube-controller-manager-master 1/1 Running 0 5m56s kube-system kube-proxy-2prxw 1/1 Running 0 153m kube-system kube-proxy-q9n5c 1/1 Running 0 158m kube-system kube-proxy-rwbqz 1/1 Running 0 153m kube-system kube-scheduler-master 1/1 Running 0 10m
