Azure DevOps 部署到 GKE (3) — kubectl

要做到DevOps自動部署，一定要先學會如何手動部署到K8s，kubectl是官方出的cli工具，透過kubectl可以完全操作K8s叢集。

常見指令#

Kubernetes是由各種resource組成，包含容器架構調度，以下說明一些常用到kubectl 指令。

查看常用的Resource：kubectl get all

查看所有節點：kubectl get node

查看Pod資訊：kubectl describe pod <pod_name>

查看Pod log：kubectl logs <pod_name>

進入Pod：kubectl exe -it <pod_name> -- /bin/bash

部署、更新resource：kubectl apply -f <file_name>.yml

kubectl apply#

我們模擬上一篇的作法，將NGINX部署為deployment，並在ingress使用Google簽署的憑證，我們先在Cloud Shell建立一個nginx.yml

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apiVersion: apps/v1
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kind: Deployment
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metadata:
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  name: deployment-nginx-3
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spec:
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  replicas: 1
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  selector:
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    matchLabels:
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      app: pod-nginx-3
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  template:
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    metadata:
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      labels:
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        app: pod-nginx-3
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    spec:
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      containers:
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      - name: nginx
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        image: nginx:1.23
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        ports:
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        - containerPort: 80
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---
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apiVersion: v1
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kind: Service
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metadata:
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  name: service-nginx-3
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spec:
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  type: ClusterIP
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  ports:
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  - port: 80
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    protocol: TCP
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    targetPort: 80
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  selector:
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    app: pod-nginx-3
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---
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apiVersion: networking.gke.io/v1
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kind: ManagedCertificate
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metadata:
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  name: cert-nginx-3
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spec:
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  domains:
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  - nginx-3.twcanhelp.me
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---
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apiVersion: networking.k8s.io/v1
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kind: Ingress
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metadata:
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  name: ingress-nginx-3
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  annotations:
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    networking.gke.io/managed-certificates: cert-nginx-3
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spec:
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  rules:
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  - host: nginx-3.twcanhelp.me
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    http:
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      paths:
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      - path: /
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        pathType: Prefix
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        backend:
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          service:
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            name: service-nginx-3
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            port:
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              number: 80