Question

我正在按照Setting Up Auto-Clusterization with Cloud Scripting中的描述尝试建立Jelastic集群数据库，但是我没有看到那里的文档描述如何设置或检索集群用户名和密码。

我确实尝试过将db_user和db_pass传递给集群，这些名字是我在一些示例JPS文件中找到的，并且具有这些设置，但凭证仍然只是Jelastic生成的凭证

这是我要使用的JPS；它包含一个简单的Debian容器，该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，实际环境要复杂得多，在启动时运行需要数据库连接的脚本。

{
    "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似乎正确地启动了包含ProxySQL的MariaDB主-主集群，我只是缺少有关如何为数据库集群提供数据库凭证或如何检索生成的凭证的文档。在JPS中用作变量以将其发送到容器。

Answer 1

该机制已得到改进，因此现在您可以使用环境变量或集群设置将自定义凭据传递给集群：

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

Answer 2

谢谢您的提问。传递自定义凭据的机制应该并且将很快得到改善。目前，您可以使用以下示例。简而言之，我们禁用自动群集，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，您可以通过在docker映像中执行以下命令来测试连接：

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

如何在Jelastic JPS中获取或设置集群数据库的用户名和密码

2 个答案: