# mysql

> OpenHalo 内核，提供 MySQL 协议与语法兼容能力

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LLMS index: [llms.txt](/llms.txt)

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`mysql` 配置模板使用 OpenHalo 数据库内核替代原生 PostgreSQL，提供 MySQL 线缆协议与 SQL 语法兼容能力。


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## 配置概览

- 配置名称： `mysql`
- 节点数量： 单节点
- 配置说明：OpenHalo MySQL 兼容内核配置
- 适用系统：EL 8/9/10、Debian 12/13、Ubuntu 22/24/26
- 适用架构：`x86_64`、`aarch64`
- 相关配置：[`meta`](/docs/conf/meta/)

启用方式：

```bash
./configure -c mysql [-i <primary_ip>]
```


--------

## 配置内容

源文件地址：[`pigsty/conf/mysql.yml`](https://github.com/pgsty/pigsty/blob/main/conf/mysql.yml)

<div class="highlight"><pre tabindex="0" class="chroma"><code class="language-yaml" data-lang="yaml"><span class="line"><span class="cl"><span class="nn">---</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c">#==============================================================#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c"># File      :   mysql.yml</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c"># Desc      :   1-node OpenHaloDB (MySQL Compatible) template</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c"># Ctime     :   2025-04-03</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c"># Mtime     :   2026-07-08</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c"># Docs      :   https://pigsty.io/docs/conf/mysql</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c"># License   :   Apache-2.0 @ https://pigsty.io/docs/about/license/</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c"># Copyright :   2018-2026  Ruohang Feng / Vonng (rh@vonng.com)</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c">#==============================================================#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c"># This is the config template for OpenHalo PG Kernel,</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c"># Which is a PostgreSQL 14 fork with MySQL Wire Compatibility</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c"># tutorial: https://pigsty.io/docs/pgsql/kernel/openhalo</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c">#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c"># Usage:</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c">#   curl https://repo.pigsty.io/get | bash</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c">#   ./configure -c mysql</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="c">#   ./deploy.yml</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="nt">all</span><span class="p">:</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">  </span><span class="nt">children</span><span class="p">:</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">infra</span><span class="p">:</span><span class="w"> </span>{<span class="w"> </span><span class="nt">hosts</span><span class="p">:</span><span class="w"> </span>{<span class="w"> </span><span class="nt">10.10.10.10</span><span class="p">:</span><span class="w"> </span>{<span class="w"> </span><span class="nt">infra_seq</span><span class="p">:</span><span class="w"> </span><span class="nt">1 }} ,vars</span><span class="p">:</span><span class="w"> </span>{<span class="w"> </span><span class="nt">repo_enabled</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="w"> </span>}}<span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">etcd</span><span class="p">:</span><span class="w">  </span>{<span class="w"> </span><span class="nt">hosts</span><span class="p">:</span><span class="w"> </span>{<span class="w"> </span><span class="nt">10.10.10.10</span><span class="p">:</span><span class="w"> </span>{<span class="w"> </span><span class="nt">etcd_seq</span><span class="p">:</span><span class="w"> </span><span class="nt">1  }} ,vars</span><span class="p">:</span><span class="w"> </span>{<span class="w"> </span><span class="nt">etcd_cluster</span><span class="p">:</span><span class="w"> </span><span class="l">etcd  }}</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c">#minio: { hosts: { 10.10.10.10: { minio_seq: 1 }} ,vars: { minio_cluster: minio }}</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c">#----------------------------------------------#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c"># OpenHalo Database Cluster</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c">#----------------------------------------------#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c"># connect with mysql client: mysql -h 10.10.10.10 -u dbuser_meta -D mysql (the actual database is &#39;postgres&#39;, and &#39;mysql&#39; is a schema)</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">pg-meta</span><span class="p">:</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">      </span><span class="nt">hosts</span><span class="p">:</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">        </span><span class="nt">10.10.10.10</span><span class="p">:</span><span class="w"> </span>{<span class="w"> </span><span class="nt">pg_seq</span><span class="p">:</span><span class="w"> </span><span class="nt">1, pg_role</span><span class="p">:</span><span class="w"> </span><span class="l">primary }</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">      </span><span class="nt">vars</span><span class="p">:</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">        </span><span class="nt">pg_cluster</span><span class="p">:</span><span class="w"> </span><span class="l">pg-meta</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">        </span><span class="nt">pg_users</span><span class="p">:</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">          </span>- {<span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="nt">dbuser_meta ,password</span><span class="p">:</span><span class="w"> </span><span class="nt">DBUser.Meta   ,pgbouncer</span><span class="p">:</span><span class="w"> </span><span class="nt">true ,roles</span><span class="p">:</span><span class="w"> </span><span class="nt">[dbrole_admin]    ,comment</span><span class="p">:</span><span class="w"> </span><span class="l">pigsty admin user }</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">          </span>- {<span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="nt">dbuser_view ,password</span><span class="p">:</span><span class="w"> </span><span class="nt">DBUser.Viewer ,pgbouncer</span><span class="p">:</span><span class="w"> </span><span class="nt">true ,roles</span><span class="p">:</span><span class="w"> </span><span class="nt">[dbrole_readonly] ,comment</span><span class="p">:</span><span class="w"> </span><span class="l">read-only viewer for meta database }</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">        </span><span class="nt">pg_databases</span><span class="p">:</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">          </span>- {<span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="nt">postgres, extensions</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="l">aux_mysql]}</span><span class="w"> </span><span class="c"># the mysql compatible database</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">          </span>- {<span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="nt">meta ,baseline</span><span class="p">:</span><span class="w"> </span><span class="nt">cmdb.sql ,comment</span><span class="p">:</span><span class="w"> </span><span class="nt">pigsty meta database ,schemas</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="l">pigsty]}</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">        </span><span class="nt">pg_hba_rules</span><span class="p">:</span><span class="w">   </span><span class="c"># https://pigsty.io/docs/pgsql/config/hba</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">          </span>- {<span class="w"> </span><span class="nt">user</span><span class="p">:</span><span class="w"> </span><span class="nt">all ,db</span><span class="p">:</span><span class="w"> </span><span class="nt">all ,addr</span><span class="p">:</span><span class="w"> </span><span class="nt">intra ,auth</span><span class="p">:</span><span class="w"> </span><span class="nt">pwd ,title</span><span class="p">:</span><span class="w"> </span><span class="nt">&#39;everyone intranet access with password&#39; ,order</span><span class="p">:</span><span class="w"> </span><span class="m">800</span><span class="w"> </span>}<span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">        </span><span class="nt">pg_crontab</span><span class="p">:</span><span class="w">     </span><span class="c"># https://pigsty.io/docs/pgsql/admin/crontab</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">          </span>- <span class="s1">&#39;00 01 * * * /pg/bin/pg-backup full&#39;</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">        </span><span class="c"># OpenHalo Ad Hoc Setting</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">        </span><span class="nt">pg_mode</span><span class="p">:</span><span class="w"> </span><span class="l">mysql                   </span><span class="w"> </span><span class="c"># MySQL Compatible Mode by HaloDB</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">        </span><span class="nt">pg_version</span><span class="p">:</span><span class="w"> </span><span class="m">14</span><span class="w">                    </span><span class="c"># OpenHaloDB is compatible with PG Major Version 14</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">        </span><span class="nt">pg_packages</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> </span><span class="l">openhalo, pgsql-common ] </span><span class="w"> </span><span class="c"># install openhalodb instead of postgresql kernel</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">  </span><span class="nt">vars</span><span class="p">:</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c">#----------------------------------------------#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c"># INFRA : https://pigsty.io/docs/infra/param</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c">#----------------------------------------------#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">version</span><span class="p">:</span><span class="w"> </span><span class="l">v4.5.0                  </span><span class="w"> </span><span class="c"># pigsty version string</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">admin_ip</span><span class="p">:</span><span class="w"> </span><span class="m">10.10.10.10</span><span class="w">             </span><span class="c"># admin node ip address</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">region</span><span class="p">:</span><span class="w"> </span><span class="l">default                  </span><span class="w"> </span><span class="c"># upstream mirror region: default,china,europe</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">infra_portal</span><span class="p">:</span><span class="w">                     </span><span class="c"># infra services exposed via portal</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">      </span><span class="nt">home </span><span class="p">:</span><span class="w"> </span>{<span class="w"> </span><span class="nt">domain</span><span class="p">:</span><span class="w"> </span><span class="l">i.pigsty }    </span><span class="w"> </span><span class="c"># default domain name</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c">#----------------------------------------------#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c"># NODE : https://pigsty.io/docs/node/param</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c">#----------------------------------------------#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">nodename_overwrite</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="w">           </span><span class="c"># do not overwrite node hostname on single node mode</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">node_repo_modules</span><span class="p">:</span><span class="w"> </span><span class="l">node,infra,pgsql</span><span class="w"> </span><span class="c"># add these repos directly to the singleton node</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">node_tune</span><span class="p">:</span><span class="w"> </span><span class="l">oltp                    </span><span class="w"> </span><span class="c"># node tuning specs: oltp,olap,tiny,crit</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c">#----------------------------------------------#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c"># PGSQL : https://pigsty.io/docs/pgsql/param</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c">#----------------------------------------------#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">pg_version</span><span class="p">:</span><span class="w"> </span><span class="m">14</span><span class="w">                      </span><span class="c"># OpenHalo is compatible with PG 14</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">pg_conf</span><span class="p">:</span><span class="w"> </span><span class="l">oltp.yml                  </span><span class="w"> </span><span class="c"># pgsql tuning specs: {oltp,olap,tiny,crit}.yml</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c">#----------------------------------------------#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c"># PASSWORD : https://pigsty.io/docs/setup/security/</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="c">#----------------------------------------------#</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">grafana_admin_password</span><span class="p">:</span><span class="w"> </span><span class="l">pigsty</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">grafana_view_password</span><span class="p">:</span><span class="w"> </span><span class="l">DBUser.Viewer</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">pg_admin_password</span><span class="p">:</span><span class="w"> </span><span class="l">DBUser.DBA</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">pg_monitor_password</span><span class="p">:</span><span class="w"> </span><span class="l">DBUser.Monitor</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">pg_replication_password</span><span class="p">:</span><span class="w"> </span><span class="l">DBUser.Replicator</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">patroni_password</span><span class="p">:</span><span class="w"> </span><span class="l">Patroni.API</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">haproxy_admin_password</span><span class="p">:</span><span class="w"> </span><span class="l">pigsty</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">minio_secret_key</span><span class="p">:</span><span class="w"> </span><span class="l">S3User.MinIO</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="w">    </span><span class="nt">etcd_root_password</span><span class="p">:</span><span class="w"> </span><span class="l">Etcd.Root</span><span class="w">
</span></span></span><span class="line"><span class="cl"><span class="nn">...</span><span class="w">
</span></span></span></code></pre></div>


--------

## 配置解读

`mysql` 模板使用 OpenHalo 内核，让您可以使用 MySQL 客户端工具连接 PostgreSQL。

**关键特性**：
- 使用 MySQL 协议（端口 3306），兼容 MySQL 客户端
- 支持 MySQL SQL 语法子集
- 保留 PostgreSQL 的 ACID 特性和存储引擎
- 同时支持 PostgreSQL 和 MySQL 两种协议连接

**连接方式**：

```bash
# 使用 MySQL 客户端
mysql -h 10.10.10.10 -P 3306 -u dbuser_meta -pDBUser.Meta

# 同时保留 PostgreSQL 连接能力
psql postgres://dbuser_meta:DBUser.Meta@10.10.10.10:5432/meta
```

**适用场景**：
- 从 MySQL 迁移到 PostgreSQL
- 需要同时支持 MySQL 和 PostgreSQL 客户端的应用
- 希望利用 PostgreSQL 生态同时保持 MySQL 兼容性

**注意事项**：
- OpenHalo 基于 PostgreSQL 14，不支持更高版本特性
- 部分 MySQL 语法可能存在兼容性差异
- 当前 `openhalo` 包别名已覆盖 Pigsty 支持的 Linux 平台与双架构；实际安装仍以目标平台的软件仓库索引为准
