Kubernetes Calico VxLAN 模式 Pod 间通信过程

环境准备

查看节点状态

$ kubectl get nodes -o wide
NAME                         STATUS     ROLES                  AGE     VERSION    INTERNAL-IP   EXTERNAL-IP   OS-IMAGE                         KERNEL-VERSION     CONTAINER-RUNTIME
calico-vxlan-control-plane   NotReady   control-plane,master   3m59s   v1.23.17   172.18.0.4    <none>        Debian GNU/Linux 12 (bookworm)   6.5.0-35-generic   containerd://1.7.13
calico-vxlan-worker          NotReady   <none>                 3m19s   v1.23.17   172.18.0.2    <none>        Debian GNU/Linux 12 (bookworm)   6.5.0-35-generic   containerd://1.7.13
calico-vxlan-worker2         NotReady   <none>                 3m32s   v1.23.17   172.18.0.3    <none>        Debian GNU/Linux 12 (bookworm)   6.5.0-35-generic   containerd://1.7.13

下载 Calico 清单文件

$ wget https://raw.githubusercontent.com/projectcalico/calico/v3.25.2/manifests/calico-vxlan.yaml

编辑calico-vxlan.yaml文件，修改以下配置

4574             # Enable or Disable VXLAN on the default IP pool.
4575             - name: CALICO_IPV4POOL_VXLAN
4576               value: "Always"

应用清单文件

$ kubectl apply -f ./calico-vxlan.yaml

查看创建的 Pod

$ kubectl -n kube-system get pod -l k8s-app=calico-node 
NAME                READY   STATUS    RESTARTS   AGE
calic