The k8s-review's intro from lnc0119

k8s-review's Introduction

Kubernetes測試報告

本專案主要針對kubernates的教學進行學習、測試以及紀錄
建立Spring boot專案
產生docker image
使用kubernetes minikube對外溝通

Tool Install

Minikube

brew install minikube
brew install kubectl

Docker

Usage

下載上述工具
打開Spring boot專案
使用Maven install產生target資料夾HappyDemo-0.0.1-SNAPSHOT.jar
新增docker file(如下)
修改image tag 為自己docker account/app名字(lnc2244/happy-demo)並產生local image
push to repository

(terminal)

開啟minikube 並create deployment(pod)

minikube start

8. 編輯.yaml檔案以產生deployment/pods(如下)

啟用.yaml檔案

kubectl apply -f happy-app-deployment.yaml

檢查pods中的application是否正常運作

kubectl logs [pods name]

11. 創建Serivce 讓pods可與外部溝通

minikube tunnel
kubectl expose deployment happyapp --name=happyapp-service --port --target-pirt=8080 --type=LoadBalancer

取得對外溝通localhost

minikube service happyapp-service --url 
--> http://127.0.0.1:56506

13. 在瀏覽器中輸入[localhost]/[springboot url]

Docker file

FROM openjdk:17-jdk
VOLUME /tmp
COPY target/HappyDemo-0.0.1-SNAPSHOT.jar app.jar
ENTRYPOINT ["java", "-jar", "/app.jar"]

happy-app-deployment.yaml

kind: Deployment
apiVersion: apps/v1
metadata:
  name: happyapp
  labels:
    app: happyapp
spec:
  replicas: 2
  selector:
    matchLabels:
      app: happyapp
  template:
    metadata:
      labels:
        app: happyapp
    spec:
      containers:
        - name: happy-demo
          image: lnc2244/happy-demo
          ports:
          - containerPort: 80

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