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haproxy-galera

MariaDB Galera health check script for HAProxy

Installation

Copy main.py to /usr/local/sbin/haproxy-galera and chmod +x.

Dependencies

Requires python-mysqldb, and python-requests installed.

Systemd

Copy the included systemd unit file haproxy-galera.service to /etc/systemd/system/.

Usage

MariaDB Setup

Create a local user to connect and check status:

CREATE USER 'haproxy'@'localhost';

HAProxy Setup

listen MYSQL
    bind 0.0.0.0:3306
    mode tcp
    option tcplog
    option httpchk
    balance leastconn
    default-server port 3305 inter 2s downinter 5s rise 3 fall 1 maxconn 128 maxqueue 128 weight 100 slowstart 60s
    server db1 192.168.22.141:3306 check
    server db2 192.168.22.142:3306 check backup
    server db3 192.168.22.143:3306 check backup