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