alpine-monit

A base image to run anything. It's based in alpine-base, adding monit as process management

Build

docker build -t rawmind/alpine-monit:<version> .

Process management

This image compiles and intall monit under /opt/monit, to make it super simple to start multiple process and manage them correctly.

Starts automatically all services conf files that would be copied in /opt/monit/etc/conf.d or /opt/tools/monit/conf.d

Versions

0.5.18-5 (Dockerfile) Monit version 5.18
0.3.3-2 (Dockerfile) Monit version 5.16

Usage

To use this image include FROM rawmind/alpine-monit at the top of your Dockerfile. Starting from rawmind/alpine-monit provides you with the ability to easily start any service using monit. monit will also keep it running for you, restarting it when it crashes.

To start your service using monit:

create a monit conf file in /opt/monit/etc/conf.d
create a service script that allow start, stop and restart function
Implement serviceLog function if you want that your service log will be writed to docker logs command.
example monit and script files:

monit conf

check process <service> with pidfile <service-pid-file>
  start program = "<path>/service.sh start"
  stop program = "<path>/service.sh stop"
  if failed port <port> type tcp then restart

service script

#!/usr/bin/env bash

SERVICE_NAME=zk
SERVICE_HOME=${SERVICE_HOME:-"<service-home>"}
SERVICE_CONF=${SERVICE_CONF:-"0"}

function log {
        echo `date` $ME - $@
}

function serviceLog {
    log "[ Redirecting ${SERVICE_NAME} log... ]"
    ln -sf /proc/1/fd/1 <service log file>
}

function serviceStart {
    log "[ Starting ${SERVICE_NAME}... ]"
    <commands to start service>
}

function serviceStop {
    log "[ Stoping ${SERVICE_NAME}... ]"
    <commands to stop service>
}

function serviceRestart {
    log "[ Restarting ${SERVICE_NAME}... ]"
    serviceStop
    serviceStart
}

case "$1" in
        "start")
            serviceLog
            serviceStart
        ;;
        "stop")
            serviceStop
        ;;
        "restart")
            serviceRestart
        ;;
        *) echo "Usage: $0 restart|start|stop"
        ;;

esac

Examples