K8S基本操作-31-如何檢查Cluster採用的ETCD的IP or URL ?

如何檢查Cluster採用的ETCD的IP or URL ?

由於 Kube-API server，記錄著這類的訊息，所以可以調出 Pod 訊息查看 ETCD 的位置。

kubectl -n kube-system describe pod <Kube-API Server 的 Pod 名稱>

結果類似下方:

Name:                 kube-apiserver-cluster2-controlplane
Namespace:            kube-system
Priority:             2000001000
Priority Class Name:  system-node-critical
Node:                 cluster2-controlplane/10.1.127.3
Start Time:           Wed, 31 Aug 2022 05:03:45 +0000
Labels:               component=kube-apiserver
                      tier=control-plane
Annotations:          kubeadm.kubernetes.io/kube-apiserver.advertise-address.endpoint: 10.1.127.3:6443
                      kubernetes.io/config.hash: 9bd4c04b38b27661e9e7f8b0fc1237b8
                      kubernetes.io/config.mirror: 9bd4c04b38b27661e9e7f8b0fc1237b8
                      kubernetes.io/config.seen: 2022-08-31T05:03:28.843162256Z
                      kubernetes.io/config.source: file
                      seccomp.security.alpha.kubernetes.io/pod: runtime/default
Status:               Running
IP:                   10.1.127.3
IPs:
  IP:           10.1.127.3
Controlled By:  Node/cluster2-controlplane
Containers:
  kube-apiserver:
    Container ID:  containerd://cc64f3649222f24d3fd2eb7d5f0f17db5fca76eb72dc4c17295fb4842c045f1b
    Image:         k8s.gcr.io/kube-apiserver:v1.24.0
    Image ID:      k8s.gcr.io/kube-apiserver@sha256:a04522b882e919de6141b47d72393fb01226c78e7388400f966198222558c955
    Port:          <none>
    Host Port:     <none>
    Command:
      kube-apiserver
      --advertise-address=10.1.127.3
      --allow-privileged=true
      --authorization-mode=Node,RBAC
      --client-ca-file=/etc/kubernetes/pki/ca.crt
      --enable-admission-plugins=NodeRestriction
      --enable-bootstrap-token-auth=true
      --etcd-cafile=/etc/kubernetes/pki/etcd/ca.pem
      --etcd-certfile=/etc/kubernetes/pki/etcd/etcd.pem
      --etcd-keyfile=/etc/kubernetes/pki/etcd/etcd-key.pem
      --etcd-servers=https://10.1.127.10:2379

上述我們可以看到，ETCD server 位在 10.1.127.10:2379:

      --etcd-servers=https://10.1.127.10:2379