2.2. 列出 OVN-Kubernetes 项目中的所有资源

流程

1. 运行以下命令，以获取 OVN-Kubernetes 项目中的所有资源、端点和 ConfigMap ：

   $ oc get all,ep,cm -n openshift-ovn-kubernetes

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   输出示例

   Warning: apps.openshift.io/v1 DeploymentConfig is deprecated in v4.14+, unavailable in v4.10000+
   NAME                                         READY   STATUS    RESTARTS       AGE
   pod/ovnkube-control-plane-65c6f55656-6d55h   2/2     Running   0              114m
   pod/ovnkube-control-plane-65c6f55656-fd7vw   2/2     Running   2 (104m ago)   114m
   pod/ovnkube-node-bcvts                       8/8     Running   0              113m
   pod/ovnkube-node-drgvv                       8/8     Running   0              113m
   pod/ovnkube-node-f2pxt                       8/8     Running   0              113m
   pod/ovnkube-node-frqsb                       8/8     Running   0              105m
   pod/ovnkube-node-lbxkk                       8/8     Running   0              105m
   pod/ovnkube-node-tt7bx                       8/8     Running   1 (102m ago)   105m
   
   NAME                                   TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)             AGE
   service/ovn-kubernetes-control-plane   ClusterIP   None         <none>        9108/TCP            114m
   service/ovn-kubernetes-node            ClusterIP   None         <none>        9103/TCP,9105/TCP   114m
   
   NAME                          DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR                 AGE
   daemonset.apps/ovnkube-node   6         6         6       6            6           beta.kubernetes.io/os=linux   114m
   
   NAME                                    READY   UP-TO-DATE   AVAILABLE   AGE
   deployment.apps/ovnkube-control-plane   3/3     3            3           114m
   
   NAME                                               DESIRED   CURRENT   READY   AGE
   replicaset.apps/ovnkube-control-plane-65c6f55656   3         3         3       114m
   
   NAME                                     ENDPOINTS                                               AGE
   endpoints/ovn-kubernetes-control-plane   10.0.0.3:9108,10.0.0.4:9108,10.0.0.5:9108               114m
   endpoints/ovn-kubernetes-node            10.0.0.3:9105,10.0.0.4:9105,10.0.0.5:9105 + 9 more...   114m
   
   NAME                                 DATA   AGE
   configmap/control-plane-status       1      113m
   configmap/kube-root-ca.crt           1      114m
   configmap/openshift-service-ca.crt   1      114m
   configmap/ovn-ca                     1      114m
   configmap/ovnkube-config             1      114m
   configmap/signer-ca                  1      114m

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   集群中的每个节点都有一个 ovnkube-node pod。ovnkube-config 配置映射具有 OpenShift Container Platform OVN-Kubernetes 配置。

2. 运行以下命令，列出 ovnkube-node pod 中的所有容器：

   $ oc get pods ovnkube-node-bcvts -o jsonpath='{.spec.containers[*].name}' -n openshift-ovn-kubernetes

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   预期输出

   ovn-controller ovn-acl-logging kube-rbac-proxy-node kube-rbac-proxy-ovn-metrics northd nbdb sbdb ovnkube-controller

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   ovnkube-node pod 由几个容器组成。它负责托管北向数据库(nbdb 容器)、南向数据库(sbdb 容器)、北守护进程 (northd 容器)、ovn-controller 和 ovnkube-controller 容器。ovnkube-controller 容器会监视 API 对象，如 pod、egress IP、命名空间、服务、端点、出口防火墙和网络策略。它还负责为该节点从可用子网池中分配 pod IP。

3. 运行以下命令，列出 ovnkube-control-plane pod 中的所有容器：

   $ oc get pods ovnkube-control-plane-65c6f55656-6d55h -o jsonpath='{.spec.containers[*].name}' -n openshift-ovn-kubernetes

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   预期输出

   kube-rbac-proxy ovnkube-cluster-manager

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   ovnkube-control-plane pod 有一个容器(ovnkube-cluster-manager)，它驻留在每个 OpenShift Container Platform 节点上。ovnkube-cluster-manager 容器分配 pod 子网，将子网 IP 传输交换机到集群中的每个节点。kube-rbac-proxy 容器监控 ovnkube-cluster-manager 容器的指标。