helm3下载

github地址

  1. https://github.com/helm/helm

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  1. wget https://get.helm.sh/helm-v3.3.4-linux-amd64.tar.gz
  1. tar xvf helm-v3.3.4-linux-amd64.tar.gz
  2. chmod +x linux-amd64/helm
  3. mv linux-amd64/helm /usr/bin/

38.helm3使用 - 图2

helm重要概念

Helm 重要概念：

  • charts：包含了创建Kubernetes的一个应用实例的必要信息
  • values：包含了应用发布配置信息
  • release：是一个 chart 及其配置的一个运行实例
  • repo：charts仓库，用于存储charts

    helm常用命令

    常用的项目
    1. https://artifacthub.io/

    repo

    1. helm repo --help
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    查看repo

    1. helm repo list
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    增加repo

    1. helm repo add bitnami https://charts.bitnami.com/bitnami
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    更新repo

    1. helm repo update
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    移除repo

    1. helm remove bitnami
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    search

    1. helm search --help
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    查看repo下面的包

    1. helm search repo
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    1. helm search repo  mysql
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    show

    1. helm show --help
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查看charts所有信息

  1. helm show all stable/mysql

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查看charts values信息

  1. helm show values stable/mysql

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install

  1. helm install --help

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-n 指定namespace

  1. helm install  tomcat01  stable/tomcat -n test

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—set 设values变量

  1. helm install  tomcat02  stable/tomcat -n test --set hostPort=8010

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list

  1. helm list --help

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查看部署的项目

  1. helm list -n test

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upgrade

  1. helm upgrade --help

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更新一个项目

  1. helm upgrade tomcat01  stable/tomcat -n test --set hostPort=8011

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status

  1. helm status --help

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查看项目状态

  1. helm status tomcat01 -n test

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delete

  1. helm delete --help

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删除一个项目

  1. helm delete tomcat02 -n test

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rollback

  1. helm  rollback --help

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回滚上一个项目

  1. helm rollback tomcat01 1 -n test

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history

  1. helm history --help

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查看项目历史记录

  1. helm  history tomcat01 -n test

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自定义chart

  1. helm create test

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创建模板

把 templates 目录下面所有文件全部删除掉，来创建模板文件

  1. rm -rf test/templates/*

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不加参数直接deployment

  1. cat > test/templates/deployment.yaml << EOF
  2. apiVersion: apps/v1
  3. kind: Deployment
  4. metadata:
  5.   name: app-name-dev
  6.   labels:
  7.     app: app
  8. spec:
  9.   replicas: 1
  10.   strategy:
  11.     rollingUpdate:
  12.       maxSurge: 1
  13.       maxUnavailable: 1
  14.   selector:
  15.     matchLabels:
  16.       app: app
  17.       app-name: app-name
  18.   template:
  19.     metadata:
  20.       labels:
  21.         app: app
  22.         app-name: app-name
  23.     spec:
  24.       containers:
  25.       - name: app-name
  26.         image: tomcat:latest
  27.         imagePullPolicy: Always
  28.         readinessProbe:
  29.           tcpSocket:
  30.             port: 8080
  31.           initialDelaySeconds: 50
  32.           timeoutSeconds: 5
  33.           periodSeconds: 3
  34.         livenessProbe:
  35.           tcpSocket:
  36.             port: 8080
  37.           initialDelaySeconds: 50
  38.           timeoutSeconds: 5
  39.           periodSeconds: 3
  40.         ports:
  41.         - name: http
  42.           containerPort: 8080
  43.         resources:
  44.           limits:
  45.             memory: 1Gi
  46.         volumeMounts:
  47.         - name: app
  48.           mountPath: /opt/logs
  49.       volumes:
  50.       - name: app
  51.         hostPath:
  52.           path: /opt/logs
  53.           type: DirectoryOrCreate
  54. EOF
  1. helm install  app ./test

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配置参数

  1. cat > test/templates/deployment.yaml << EOF
  2. apiVersion: apps/v1
  3. kind: Deployment
  4. metadata:
  5.   name: {{ .Values.dev.appname }}-dev
  6.   labels:
  7.     app: {{ .Values.dev.app }}
  8. spec:
  9.   replicas: 1
  10.   strategy:
  11.     rollingUpdate:
  12.       maxSurge: 1
  13.       maxUnavailable: 1
  14.   selector:
  15.     matchLabels:
  16.       app: {{ .Values.dev.app }}
  17.       app-name: {{ .Values.dev.appname }}
  18.   template:
  19.     metadata:
  20.       labels:
  21.         app: {{ .Values.dev.app }}
  22.         app-name: {{ .Values.dev.appname }}
  23.     spec:
  24.       containers:
  25.       - name: {{ .Values.dev.appname }}
  26.         image: {{ .Values.container.image }}:{{ .Values.container.tag }}
  27.         imagePullPolicy: Always
  28.         readinessProbe:
  29.           tcpSocket:
  30.             port: {{ .Values.container.port }}
  31.           initialDelaySeconds: 50
  32.           timeoutSeconds: 5
  33.           periodSeconds: 3
  34.         livenessProbe:
  35.           tcpSocket:
  36.             port: 8080
  37.           initialDelaySeconds: 50
  38.           timeoutSeconds: 5
  39.           periodSeconds: 3
  40.         ports:
  41.         - name: http
  42.           containerPort: {{ .Values.container.port }}
  43.         resources:
  44.           limits:
  45.             memory: {{ .Values.container.memory }}
  46.         volumeMounts:
  47.         - name: app
  48.           mountPath: /opt/logs
  49.       volumes:
  50.       - name: app
  51.         hostPath:
  52.           path: /opt/logs
  53.           type: DirectoryOrCreate
  54. EOF
  1. cat > test/values.yaml << EOF
  2. dev:
  3.   app: tomcat
  4.   appname: tomcat-8
  5. container:
  6.   image: tomcat
  7.   tag: latest
  8.   port: 8080
  9.   memory: 1Gi
  10. EOF
  1. helm install  app01 ./test

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