如何在 Jelastic JPS 中获取或设置集群数据库用户名和密码

Question

我正在尝试按照 Setting Up Auto-Clusterization with Cloud Scripting 中的描述设置 Jelastic 集群数据库，但我没有看到描述如何设置或检索集群用户名和密码的文档。

我确实尝试将 db_user 和 db_pass 传递给集群，我在一些示例 JPS 文件中找到的名称，以及将它们作为设置，但凭据仍然只是 Jelastic生成的。

这是我正在尝试使用的 JPS；它包括一个简单的 Debian 容器，需要数据库凭据作为环境变量。在这种情况下，Docker 容器仅包含用于测试目的的 MariaDB 客户端，实际环境比这复杂一点，启动时运行个脚本需要数据库连接。

{
    "version": "1.5",
    "type": "install",
    "name": "Database test",
    "skipNodeEmails": true,
    "globals":
    {
        "MYSQL_ROOT_USERNAME": "root",
        "MYSQL_ROOT_PASSWORD": "${fn.password(20)}",
        "MYSQL_USERNAME": "username",
        "MYSQL_PASSWORD": "${fn.password(20)}",
        "MYSQL_DATABASE": "database",
        "MYSQL_HOSTNAME": "ProxySQL"
    },
    "nodes":
    [
        {
            "image": "mireiawen/debian-sql",
            "count": 1,
            "cloudlets": 8,
            "nodeGroup": "vds",
            "displayName": "SQL worker",
            "env":
            {
                "MYSQL_ROOT_USERNAME": "${globals.MYSQL_ROOT_USERNAME}",
                "MYSQL_ROOT_PASSWORD": "${globals.MYSQL_ROOT_PASSWORD}",
                "MYSQL_USERNAME": "${globals.MYSQL_USERNAME}",
                "MYSQL_PASSWORD": "${globals.MYSQL_PASSWORD}",
                "MYSQL_DATABASE": "${globals.MYSQL_DATABASE}",
                "MYSQL_HOSTNAME": "${globals.MYSQL_HOSTNAME}"
            }
        },
        {
            "nodeType": "mariadb-dockerized",
            "nodeGroup": "sqldb",
            "count": "2",
            "cloudlets": 16,
            "cluster":
            {
                "scheme": "master"
            }
        }
    ]
}

这个 JPS 似乎正确启动了包含 ProxySQL 的 MariaDB master-master 集群，我只是缺少有关如何向数据库集群提供数据库凭据或检索生成的凭据的方法的文档用作 JPS 中的变量以将其发送到容器。

Answer 1

谢谢你提出的好问题。传递自定义凭据的机制应该并且很快就会得到改进。目前您可以使用下面的示例。简而言之，我们禁用自动集群并使用自定义用户名和密码再次启用它。

---
version: 1.5
type: install
name: Database test
skipNodeEmails: true
baseUrl: https://raw.githubusercontent.com/jelastic-jps/mysql-cluster/master
globals:
  logic_jps: ${baseUrl}/addons/auto-clustering/scripts/auto-cluster-logic.jps
  MYSQL_USERNAME: username
  MYSQL_PASSWORD: ${fn.password(20)}

nodes:
- image: mireiawen/debian-sql
  count: 1
  cloudlets: 8
  nodeGroup: extra
  displayName: SQL worker
  env:
    MYSQL_USERNAME: ${globals.MYSQL_USERNAME}
    MYSQL_PASSWORD: ${globals.MYSQL_PASSWORD}

- nodeType: mariadb-dockerized
  nodeGroup: sqldb
  count: 2
  cloudlets: 16
  cluster: false

onInstall: 
  install:
    jps: ${globals.logic_jps}
    envName: ${env.envName}
    nodeGroup: sqldb
    settings:
      path: ${baseUrl}
      scheme: master
      logic_jps: ${globals.logic_jps}
      db_user: ${globals.MYSQL_USERNAME}
      db_pass: ${globals.MYSQL_PASSWORD}
      repl_user: repl-${fn.random}
      repl_pass: ${fn.password(20)}

环境准备就绪后，您可以在 docker 映像中执行以下命令来测试连接：

 mysql -h proxy -u $MYSQL_USERNAME -p$MYSQL_PASSWORD

Answer 2

该机制已得到改进，现在您可以使用环境变量或集群设置将自定义凭据传递到集群：

type: install
name: env. variables

nodes: 
  nodeType: mariadb-dockerized
  nodeGroup: sqldb
  count: 2
  cloudlets: 8
  env:
    DB_USER: customuser
    DB_PASS: custompass
  cluster:
    scheme: master

或

type: install
name: cluster settings

nodes: 
  nodeType: mariadb-dockerized
  nodeGroup: sqldb
  count: 2
  cloudlets: 8
  cluster:
    scheme: master
    db_user: customuser
    db_pass: custompass

如何在 Jelastic JPS 中获取或设置集群数据库用户名和密码

How to get or set the clustered database username and password in Jelastic JPS

jelastic