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k8s知识笔记/一、k8s 资源清单/2、资源清单的五大字段.conf

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+一、资源清单-结构
+
+    五大对象字段：
+        1. apiVersion [接口组/版本]
+        2. kind [资源类型]
+        3. metadata [元数据]
+        4. spec [规格/期望]
+        5. status [状态]
+
+1.1 [接口组/版本] group/apiVersion 
+    * 例子: apiVersion: v1                                # pod
+            apiVersion: apps/v1                           # deployment
+            apiVersion: batch/v1                          # job
+            apiVersion: networking.k8s.io/v1              # ingress
+            apiVersion: rbac.authorization.k8s.io/v1      # rbac
+    
+    常见命令: 
+    1、查看集群api版本命令: kubectl api-versions
+        
+        root@k8s-master:~# kubectl api-versions
+            admissionregistration.k8s.io/v1
+            apiextensions.k8s.io/v1
+            apiregistration.k8s.io/v1
+            apps/v1
+            authentication.k8s.io/v1
+            authorization.k8s.io/v1
+            autoscaling/v1
+            autoscaling/v2
+            batch/v1
+            certificates.k8s.io/v1
+            coordination.k8s.io/v1
+            crd.projectcalico.org/v1
+            discovery.k8s.io/v1
+            events.k8s.io/v1
+            flowcontrol.apiserver.k8s.io/v1
+            networking.k8s.io/v1
+            node.k8s.io/v1
+            policy/v1
+            rbac.authorization.k8s.io/v1
+            resource.k8s.io/v1
+            scheduling.k8s.io/v1
+            storage.k8s.io/v1
+            v1
+
+        [注意事项]: 
+            1. group为空时, 直接使用v1表示
+            2. group和version之间用/分隔
+            3. v1表示默认的版本, 即 core/v1
+
+    2、查看某个资源的api解释命令: kubectl explain <资源类型> [Deployment、ReplicaSet、DaemonSet、Job、CronJob]
+        例子: kubectl explain Pod     
+
+1.2 [资源类型] kind: List
+    * 例子: kind: Pod
+            kind: Deployment
+            kind: Service
+            kind: Ingress
+            kind: ConfigMap
+            kind: Secret
+            kind: PersistentVolumeClaim
+            kind: Namespace
+            kind: Node
+            kind: PersistentVolume
+            kind: ClusterRole
+            kind: ClusterRoleBinding
+            kind: CustomResourceDefinition
+            kind: HPA
+            kind: PodTemplate
+            kind: LimitRange
+
+1.3 [元数据] metadata:
+    * 例子: metadata:
+                name: my-pod
+                namespace: default
+                labels:
+                    app: my-app
+                annotations:
+                    description: "This is my pod"
+
+1.4 [规格/期望] spec:
+    * 例子: 
+    spec:
+      containers:
+        - name: my-container
+          image: nginx:latest
+          ports:
+            - containerPort: 80
+      replicas: 3
+      selector:
+        matchLabels:
+          app: my-app
+      volumeMounts:
+        - name: my-volume
+          mountPath: /data
+      volumes:
+        - name: my-volume
+          persistentVolumeClaim:
+            claimName: my-pvc
+
+1.5 [状态] status: # 初次自定义时, 一般不写该字段, 由系统自动生成和维护
+    * 例子: 
+    status:
+      coordinations:
+        leaseDurationSeconds: 15
+        renewTime: "2023-10-01T12:00:00Z"
+
+
+
+# =======================================================================
+
+
+
+二、pod 资源清单示例：
+# 1. 创建一个名为 my-pod 的 Pod，包含两个容器 第一个容器使用 nginx 镜像，监听 80 端口, 第二个容器使用 busybox 镜像, 执行一个简单的命令 Pod 运行在 default 命名空间: 
+ vim my-pod.yaml
+
+  apiVersion: v1
+  kind: Pod
+  metadata:
+    name: my-pod
+    namespace: default
+    labels:
+      app: my-app
+    annotations:
+      description: "This is my pod"
+  spec:
+    containers:
+      - name: my-container
+        image: nginx:latest
+        ports:
+          - containerPort: 80
+      - name: sidecar-container
+        image: busybox
+        command:
+          - "bash/sh"
+          - "-c"
+          - "sleep 3600"
+    replicas: 3
+    selector:
+      matchLabels:
+        app: my-app
+    volumeMounts:
+      - name: my-volume
+        mountPath: /data
+    volumes:
+      - name: my-volume
+        persistentVolumeClaim:
+          claimName: my-pvc
+
+2、pod 资源清单应用命令: (实例化资源对象)
+    kubectl apply -f my-pod.yaml
+
+3、查看 pod 资源命令:
+    kubectl get pods -A                  # 查看所有命名空间的 pod
+    kubectl get pods -n default          # 查看 default 命名空间的 pod
+    kubectl get pods -n kube-system      # 查看 kube-system 命名空间的 pod
+    kubectl get pod my-pod -o yaml       # 查看指定 pod 的详细信息
+    kubectl get pod my-pod -o wide       # 查看指定 pod 的宽表信息(IP、节点等)
+
+