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Kubernetes-helm

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1 helm语法

  1. 内建对象

2 Tips

2.1 仅下载chart package

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helm pull --destination /path/to/save/my-chart-1.0.0.tgz <repository-url>/<chart-name>

2.2 仅渲染chart package

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helm template <chart-directory>

2.3 从运行时提取信息，并注入到环境变量中

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containers:
- env:
  - name: NODE_IP
    valueFrom:
      fieldRef:
        fieldPath: status.hostIP

2.4 环境变量相互引用

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containers:
  env:
  - name: DB_URL_HOSTNAME               // part 1
    valueFrom:
      secretKeyRef:
        name: my-database-credentials
        key: hostname

  - name: DB_URL_PORT                   // part 2
    valueFrom:
      secretKeyRef:
        name: my-database-credentials
        key: port

  - name: DB_URL_DBNAME                 // part 3
    valueFrom:
      secretKeyRef:
        name: my-database-credentials
        key: database

  - name: DATABASE_URL                  // combine
    value: jdbc:postgresql:$(DB_URL_HOSTNAME):$(DB_URL_PORT)/$(DB_URL_DBNAME)

3 参考