HAProxy TCP Çheck Wrapper is a deamon, listening on specific TCP port.
Execute a script when the TCP port is connected, and return the result to TCP client.
make
make install
Copy /etc/haproxy-tcp-check-wrapper to /etc
Edit the /etc/haproxy-tcp-check-wrapper/config.toml
# Which IP address bound to.
host = "0.0.0.0"
# Which TCP Port bound to.
port = 9090
# Which script to run, when tcp connection established.
script = "/root/mysqlchk.mysql"Just run haproxy-tcp-check-wrapper
haproxy_tcp_check &
listen mysql
mode tcp
balance source
option tcp-check
tcp-check expect string MySQL\ master\ is\ running
default-server port 9090 downinter 5s rise 3 fall 2 slowstart 60s
option tcplog
bind 10.177.4.100:3306
server control-01 10.177.4.10:3306 check
server control-02 10.177.4.11:3306 check
server control-03 10.177.4.12:3306 check