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Installation Guide

Clone the repo and cd into the directory!!!

$ cd /tmp
$ git clone https://github.com/xch91/resty-mysql-proxy.git
$ cd resty-mysql-proxy

Install OpenResty

It is suggested to use OpenResty official build per described here. Which is essentially the following steps:

$ yum install yum-utils
$ yum-config-manager --add-repo https://openresty.org/package/centos/openresty.repo
$ yum install openresty

# Strongly recommended - symbolically link config files:
$ ln -s /usr/local/openresty/nginx/conf /etc/openresty

Install syslog-ng

Syslog-ng official website has a pretty comprehensive guide on installing the latest version of syslog-ng to CentOS. Which is essentially the following steps:

$ curl https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm | rpm -Uvh -
# If the key installation throws a warning or failed, try download the file and install with rpm -Uvh {filename} explicitly

$ cd /etc/yum.repos.d && curl https://copr.fedorainfracloud.org/coprs/czanik/syslog-ng314/repo/epel-7/czanik-syslog-ng314-epel-7.repo -O && cd -
$ yum install syslog-ng

Install resty-logger-socket

Being a playful hipster, I use the code from master branch in this source; but for stability concerns, a tagged version of lua code could be used instead.

$ mkdir -p /usr/local/openresty/lualib/resty/logger
$ curl -L -o /usr/local/openresty/lualib/resty/logger/socket.lua \
          https://raw.githubusercontent.com/cloudflare/lua-resty-logger-socket/master/lib/resty/logger/socket.lua

Slot in OpenResty configuration

# Backup origin config
$ mv /usr/local/openresty/nginx/conf/nginx.conf{,.backup}
$ cp ./nginx.conf /usr/local/openresty/nginx/conf/nginx.conf
$ cp -r ./proxy.d /usr/local/openresty/nginx/conf/
$ cp -r ./lua /usr/local/openresty/nginx/

Write a syslog-ng configuration

Put the following config into /etc/syslog-ng/conf.d/mysql-proxy.conf:

source s_mysql {
    network(
        ip(0.0.0.0)
        transport("tcp")
        port(601)
    );
};

destination d_mysql {
    file(
        "/var/log/mysql-proxy/access.log"
        template("${MESSAGE}\n")
    );
};

log {
    source(s_mysql);
    destination(d_mysql);
};

Enable & Start syslog-ng

$ mkdir -p /var/log/mysql-proxy
$ systemctl enable syslog-ng
$ systemctl start syslog-ng

Config DB server and syslog-ng IP & ports

In /usr/local/openresty/nginx/conf/nginx.conf (if symbolically linked to /etc as suggested above, it would be /etc/openresty/nginx.conf) line 25 & 26 define syslog-ng IP and port.

A new proxy port could be added by creating a new *.conf file containing a server block per demonstrated in /usr/local/openresty/nginx/conf/proxy.d/demo.conf. The 3 parameters passed to loop function are:

  1. The DB instance server IP, required
  2. The DB instance port, required
  3. The proxy port, same as defined in listen directive, optional

Enable & Start OpenResty

$ systemctl enable openresty
$ systemctl start openresty