ls  /etc/cni/net.d


查看CNI插件，可以得知使用的是flannel
cat /etc/cni/net.d/10-flannel.conflist

{
  "name": "cbr0",
  "cniVersion": "0.3.1",
  "plugins": [
    {
      "type": "flannel",
      "delegate": {
        "hairpinMode": true,
        "isDefaultGateway": true
      }
    },
    {
      "type": "portmap",
      "capabilities": {
        "portMappings": true
      }
    }
  ]
}

如果是calico则显示

cat /etc/cni/net.d/10-calico.conflist

{
  "name": "k8s-pod-network",
  "cniVersion": "0.3.1",
  "plugins": [
    {
      "type": "calico",
      "log_level": "info",
      "log_file_path": "/var/log/calico/cni/cni.log",
      "datastore_type": "kubernetes",
      "nodename": "k8s-develop-master-1",
      "mtu": 1440,
      "ipam": {
          "type": "calico-ipam"
      },
      "policy": {
          "type": "k8s"
      },
      "kubernetes": {
          "kubeconfig": "/etc/cni/net.d/calico-kubeconfig"
      }
    },
    {
      "type": "portmap",
      "snat": true,
      "capabilities": {"portMappings": true}
    },
    {
      "type": "bandwidth",
      "capabilities": {"bandwidth": true}
    }
  ]
}

删除flannel的pod
使用一开始创建pod时同样的yaml文件

kubectl delete -f https://zhengyu1992.cn/file/deployment/kubeadm/flannel-1.1.2.yaml

在集群各节点清理flannel网络的残留文件

ifconfig cni0 down
ip link delete cni0
ifconfig flannel.1 down
ip link delete flannel.1
rm -rf /var/lib/cni
rm -rf /etc/cni/net.d

部署calico3.25

wget --no-check-certificate https://projectcalico.docs.tigera.io/archive/v3.25/manifests/calico.yaml
##上面的镜像地址在国外拉去不到，我把一些镜像拉去下来传到了阿里云
kubectl create -f https://zhengyu1992.cn/file/deployment/kubeadm/calico-3.2.5.yaml

官方最新版:

calico官方文档：

https://docs.tigera.io/calico/latest/getting-started/kubernetes/quickstart

利用operator部署3.26.3

kubectl create -f https://raw.githubusercontent.com/projectcalico/calico/v3.26.3/manifests/tigera-operator.yaml
kubectl create -f https://raw.githubusercontent.com/projectcalico/calico/v3.26.3/manifests/custom-resources.yaml