136 lines
3 KiB
Markdown
136 lines
3 KiB
Markdown
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# MySQL Proxy
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# Usage with docker-compose
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without
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```
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version: '2'
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services:
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db:
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image: mysql:8.0.0
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restart: always
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ports:
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- "3307:3306" #for external connection
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volumes:
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- ../mysql-data/db:/var/lib/mysql #mysql-data
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environment:
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MYSQL_ROOT_PASSWORD: password
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MYSQL_DATABASE: dbuser
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MYSQL_USER: dbuser
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MYSQL_PASSWORD: password
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```
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within
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```
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version: '2'
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services:
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mysql:
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image: mysql:8.0.0
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restart: always
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expose:
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- "3306" #for service mysql-proxy
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ports:
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- "3307:3306" #for external connection
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volumes:
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- ../mysql-data/db:/var/lib/mysql #mysql-data
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environment:
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MYSQL_ROOT_PASSWORD: password
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MYSQL_DATABASE: dbuser
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MYSQL_USER: dbuser
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MYSQL_PASSWORD: password
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db:
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image: matthewbaggett/mysql-proxy
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expose:
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- "3306" #for service php
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ports:
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- "3308:3306" #for external connection
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restart: always
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volumes:
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- ../mysql-proxy-conf:/opt/mysql-proxy/conf
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environment:
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PROXY_DB_PORT: 3306
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REMOTE_DB_HOST: mysql
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REMOTE_DB_PORT: 3306
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LUA_SCRIPT: "/opt/mysql-proxy/conf/main.lua"
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depends_on:
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- mysql
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```
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# Query to stdout
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For `docker-compose up` without `-d` (`../mysql-proxy/main.lua`)
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```
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function read_query(packet)
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if string.byte(packet) == proxy.COM_QUERY then
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print(string.sub(packet, 2))
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end
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end
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```
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# Query logging for mysql-proxy
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```
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...
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volumes:
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- ../mysql-proxy-conf:/opt/mysql-proxy/conf
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- ../mysql-proxy-logs:/opt/mysql-proxy/logs
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environment:
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PROXY_DB_PORT: 3306
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REMOTE_DB_HOST: mysql
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REMOTE_DB_PORT: 3306
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LUA_SCRIPT: "/opt/mysql-proxy/conf/log.lua"
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LOG_FILE: "/opt/mysql-proxy/logs/mysql.log"
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...
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```
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`/mysql-proxy-conf/log.lua` https://gist.github.com/simonw/1039751
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```
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local log_file = os.getenv("LOG_FILE")
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local fh = io.open(log_file, "a+")
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function read_query( packet )
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if string.byte(packet) == proxy.COM_QUERY then
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local query = string.sub(packet, 2)
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fh:write( string.format("%s %6d -- %s \n",
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os.date('%Y-%m-%d %H:%M:%S'),
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proxy.connection.server["thread_id"],
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query))
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fh:flush()
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end
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end
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```
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# thanks
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https://hub.docker.com/r/zwxajh/mysql-proxy
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https://hub.docker.com/r/gediminaspuksmys/mysqlproxy/
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# logrotate
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The image can be expand with `logrotate`
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Config file `/etc/logrotate.d/mysql-proxy` (approximate)
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```
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/opt/mysql-proxy/mysql.log {
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weekly
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missingok
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rotate 35600
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compress
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delaycompress
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notifempty
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create 666 root root
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postrotate
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/etc/init.d/mysql-proxy reload > /dev/null
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endscript
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}
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```
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# troubleshooting
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If you can't create the chain `mysql` -> `mysql-proxy` -> `external client liten 0.0.0.0:3308`
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check extends ports on the `mysql` service and/or add `expose` directly
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```
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expose:
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- "3306" #for service mysql-proxy
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```
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> note: Log send to file with delay (buffering mechanism). You can restart the container for get the log immediately.
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