mysql
OpenHalo 内核，提供 MySQL 协议与语法兼容能力
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。
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：
el8,el9,el10,d12,d13,u22,u24 - 适用架构：
x86_64 - 相关配置：
meta
启用方式：
./configure -c mysql [-i <primary_ip>]
配置内容
源文件地址：pigsty/conf/mysql.yml
---
#==============================================================#
# File : mysql.yml
# Desc : 1-node OpenHaloDB (MySQL Compatible) template
# Ctime : 2025-04-03
# Mtime : 2025-12-28
# Docs : https://doc.pgsty.com/config
# License : Apache-2.0 @ https://pigsty.io/docs/about/license/
# Copyright : 2018-2026 Ruohang Feng / Vonng (rh@vonng.com)
#==============================================================#
# This is the config template for OpenHalo PG Kernel,
# Which is a PostgreSQL 14 fork with MySQL Wire Compatibility
# tutorial: https://doc.pgsty.com/pgsql/kernel/openhalo
#
# Usage:
# curl https://repo.pigsty.io/get | bash
# ./configure -c mysql
# ./deploy.yml
all:
children:
infra: { hosts: { 10.10.10.10: { infra_seq: 1 }} ,vars: { repo_enabled: false }}
etcd: { hosts: { 10.10.10.10: { etcd_seq: 1 }} ,vars: { etcd_cluster: etcd }}
#minio: { hosts: { 10.10.10.10: { minio_seq: 1 }} ,vars: { minio_cluster: minio }}
#----------------------------------------------#
# OpenHalo Database Cluster
#----------------------------------------------#
# connect with mysql client: mysql -h 10.10.10.10 -u dbuser_meta -D mysql (the actual database is 'postgres', and 'mysql' is a schema)
pg-meta:
hosts:
10.10.10.10: { pg_seq: 1, pg_role: primary }
vars:
pg_cluster: pg-meta
pg_users:
- {name: dbuser_meta ,password: DBUser.Meta ,pgbouncer: true ,roles: [dbrole_admin] ,comment: pigsty admin user }
- {name: dbuser_view ,password: DBUser.Viewer ,pgbouncer: true ,roles: [dbrole_readonly] ,comment: read-only viewer for meta database }
pg_databases:
- {name: postgres, extensions: [aux_mysql]} # the mysql compatible database
- {name: meta ,baseline: cmdb.sql ,comment: pigsty meta database ,schemas: [pigsty]}
pg_hba_rules:
- {user: dbuser_view , db: all ,addr: infra ,auth: pwd ,title: 'allow grafana dashboard access cmdb from infra nodes'}
node_crontab: [ '00 01 * * * postgres /pg/bin/pg-backup full' ] # make a full backup every 1am
# OpenHalo Ad Hoc Setting
pg_mode: mysql # MySQL Compatible Mode by HaloDB
pg_version: 14 # The current HaloDB is compatible with PG Major Version 14
pg_packages: [ openhalodb, pgsql-common ] # install openhalodb instead of postgresql kernel
vars:
#----------------------------------------------#
# INFRA : https://doc.pgsty.com/infra/param
#----------------------------------------------#
version: v4.0.0 # pigsty version string
admin_ip: 10.10.10.10 # admin node ip address
region: default # upstream mirror region: default,china,europe
infra_portal: # infra services exposed via portal
home : { domain: i.pigsty } # default domain name
#----------------------------------------------#
# NODE : https://doc.pgsty.com/node/param
#----------------------------------------------#
nodename_overwrite: false # do not overwrite node hostname on single node mode
node_repo_modules: node,infra,pgsql # add these repos directly to the singleton node
node_tune: oltp # node tuning specs: oltp,olap,tiny,crit
#----------------------------------------------#
# PGSQL : https://doc.pgsty.com/pgsql/param
#----------------------------------------------#
pg_version: 14 # OpenHalo is compatible with PG 14
pg_conf: oltp.yml # pgsql tuning specs: {oltp,olap,tiny,crit}.yml
#----------------------------------------------#
# PASSWORD : https://doc.pgsty.com/config/security
#----------------------------------------------#
grafana_admin_password: pigsty
grafana_view_password: DBUser.Viewer
pg_admin_password: DBUser.DBA
pg_monitor_password: DBUser.Monitor
pg_replication_password: DBUser.Replicator
patroni_password: Patroni.API
haproxy_admin_password: pigsty
minio_secret_key: S3User.MinIO
etcd_root_password: Etcd.Root
...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：
# 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
- 仅支持 EL8/EL9 系统
- 不支持 ARM64 架构