假如kubernetes不支持docker了该怎么办

假如kubernetes不支持docker了该怎么办

从官网安装文档可以看到kubernetes支持一下几种：

https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/

如何使用containerd 代替docker呢

https://kubernetes.io/docs/setup/production-environment/container-runtimes/#containerd

containerd安装

一般安装docker会默认安装containerd 此时不启动docker即可

cat > /etc/modules-load.d/containerd.conf <<EOF
overlay
br_netfilter
EOF

modprobe overlay
modprobe br_netfilter

# Setup required sysctl params, these persist across reboots.
cat > /etc/sysctl.d/99-kubernetes-cri.conf <<EOF
net.bridge.bridge-nf-call-iptables  = 1
net.ipv4.ip_forward                 = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF

sysctl --system

# Configure containerd
mkdir -p /etc/containerd
containerd config default > /etc/containerd/config.toml

# Restart containerd
systemctl restart containerd && systemctl enable containerd

# config kubelet cgroup
cat > /etc/default/kubelet <<EOF
KUBELET_EXTRA_ARGS=--cgroup-driver=systemd
EOF

# config CRI

cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF

　修改/etc/containerd/config.toml文件 镜像地址

sandbox_image = "registry.aliyuncs.com/google_containers/pause:3.2"

使用配置文件方案初始化集群

kubeadm config print init-defaults  > kubeadm-config.yaml

修改 kubeadm-config.yaml

apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
  - system:bootstrappers:kubeadm:default-node-token
  token: abcdef.0123456789abcdef
  ttl: 24h0m0s
  usages:
  - signing
  - authentication
kind: InitConfiguration
localAPIEndpoint:
  advertiseAddress: 192.168.100.80
  bindPort: 6443
nodeRegistration:
  criSocket: /run/containerd/containerd.sock
  name: k8s-master
  taints:
  - effect: NoSchedule
    key: node-role.kubernetes.io/master
---
apiServer:
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns:
  type: CoreDNS
etcd:
  local:
    dataDir: /var/lib/etcd
imageRepository: registry.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.20.0
networking:
  podSubnet: 10.244.0.0/16
  dnsDomain: cluster.local
  serviceSubnet: 10.96.0.0/12
scheduler: {}

　

初始化：

kubeadm init --config kubeadm-config.yaml

安装kube-router代替kube-proxy参考如下文章

https://www.cnblogs.com/xuliang666/p/14380882.html