helm 使用自定义chart发布应用

骑猪看日落 2022-10-17 13:53 208阅读 0赞

# 1 准备一组yaml文件 #

如下准备两个资源编排文件，nginx的deploy文件和nginx的service文件

生成 web-deploy.yaml

[root@localhost helm]# kubectl create deploy web --image=nginx -o yaml --dry-run > web-deploy.yaml
    W0603 16:49:58.666722   22490 helpers.go:535] --dry-run is deprecated and can be replaced with --dry-run=client.
    [root@localhost helm]# ll
    总用量 4
    -rw-r--r--. 1 root root 376 6月   3 16:49 web-deploy.yaml
    [root@localhost helm]# cat web-deploy.yaml
    apiVersion: apps/v1
    kind: Deployment
    metadata:
      creationTimestamp: null
      labels:
        app: web
      name: web
    spec:
      replicas: 1
      selector:
        matchLabels:
          app: web
      strategy: {}
      template:
        metadata:
          creationTimestamp: null
          labels:
            app: web
        spec:
          containers:
          - image: nginx
            name: nginx
            resources: {}
    status: {}

生成 web-service.yaml

[root@localhost helm]# kubectl expose deploy web --port=80 --target-port=80 --type=NodePort -o yaml --dry-run > web-service.yaml
    W0603 16:53:08.027380   23080 helpers.go:535] --dry-run is deprecated and can be replaced with --dry-run=client.
    [root@localhost helm]# ll
    总用量 8
    -rw-r--r--. 1 root root 376 6月   3 16:49 web-deploy.yaml
    -rw-r--r--. 1 root root 234 6月   3 16:53 web-service.yaml
    [root@localhost helm]# cat web-service.yaml
    apiVersion: v1
    kind: Service
    metadata:
      creationTimestamp: null
      labels:
        app: web
      name: web
    spec:
      ports:
      - port: 80
        protocol: TCP
        targetPort: 80
      selector:
        app: web
      type: NodePort
    status:
      loadBalancer: {}

# 删除deploy 以便测试chart部署web应用
    [root@localhost helm]# kubectl delete deploy web
    deployment.apps "web" deleted

# 2 创建自定义chart #

# 创建自定义chart后生成mychart目录，在mychart目录下的文件：
    # charts 存放依赖的chart
    # Chart.yaml 存放自定义chart的描述属性
    # templates 存放自己打包的一组yaml文件（前面生成的两个yaml文件就是放这里）
    # values.yaml 是全局变量配置文件
    
    [root@localhost helm]# helm create mychart
    Creating mychart
    [root@localhost helm]# ls
    mychart  web-deploy.yaml  web-service.yaml
    [root@localhost helm]# cd mychart
    [root@localhost mychart]# ls
    charts  Chart.yaml  templates  values.yaml
    
    
    # 清空templates中的默认文件
     rm -rf templates/*
    
    # 把创建的一组yaml文件移到到templates中
    [root@localhost helm]# ls
    mychart  web-deploy.yaml  web-service.yaml
    [root@localhost helm]# cp web-*.yaml mychart/templates/

# 3 安装自定义的chart #

[root@localhost helm]# helm install web-helm mychart/
    NAME: web-helm
    LAST DEPLOYED: Thu Jun  3 17:08:07 2021
    NAMESPACE: default
    STATUS: deployed
    REVISION: 1
    TEST SUITE: None
    
    # 查看部署的应用
    [root@localhost helm]# helm list
    NAME            NAMESPACE       REVISION        UPDATED                                 STATUS          CHART           APP VERS
    web-chart       default         1               2021-06-03 17:06:11.924500118 +0800 CST failed          mychart-0.1.0   1.16.0
    web-chart1      default         1               2021-06-03 17:06:39.808945244 +0800 CST failed          mychart-0.1.0   1.16.0
    web-helm        default         1               2021-06-03 17:08:07.348163084 +0800 CST deployed        mychart-0.1.0   1.16.0
    
    # 查看应用状态
    [root@localhost helm]# helm status web-helm
    NAME: web-helm
    LAST DEPLOYED: Thu Jun  3 17:08:07 2021
    NAMESPACE: default
    STATUS: deployed
    REVISION: 1
    TEST SUITE: None
    
    
    
    # 查看web服务 出现web service说明部署成功
    [root@localhost helm]# kubectl get svc

# 基于应用的版本升级
    当对yaml文件修改后，则需要upgrade进行应用级的版本升级
    
    [root@localhost helm]# helm upgrade web-helm mychart/
    Release "web-helm" has been upgraded. Happy Helming!
    NAME: web-helm
    LAST DEPLOYED: Thu Jun  3 17:21:09 2021
    NAMESPACE: default
    STATUS: deployed
    REVISION: 2
    TEST SUITE: None