Hello,

I've tried to write an OCF ressource agent in order to manage by the heartbeat way a dovecot server. It seems to work fine.

This kind of script could be found in the directory on a CentOS release 5.2 : /usr/lib/ocf/resource.d/

If the attachement isn't working, I've cut and paste the script here : http://www-sop.inria.fr/members/Mathieu.Kretchner/dotclear/index.php/2008/12...

#!/bin/bash -p # # $Id: ha-dovecot,v 1.2 2008/12/19 09:32:27 mkretchn Exp $

#---+ Notes

## Cf: http://linux-ha.org/OCFResourceAgent ## http://www.opencf.org/cgi-bin/viewcvs.cgi/specs/ra/resource-agent-api.txt?re... ## /usr/share/heartbeat/crm.dtd

#---+ Contexte OCF

# Pour execution (status monitor) hors controle de heartbeat if [ -z "$OCF_ROOT" ]; then OCF_ROOT=/usr/lib/ocf fi

source ${OCF_ROOT}/resource.d/heartbeat/.ocf-shellfuncs

#---+ Actions

usage () { echo "Usage: $0 {start|stop|monitor|meta-data|validate-all}" }

meta_data () { local rev="$Revision: 1.2 $" rev=${rev#* }; rev=${rev% *} cat <

<?xml version="1.0"?>

<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">

<resource-agent name="ha-dovecot"> <version>$rev</version> <longdesc lang="en"> dovecot </longdesc> <shortdesc lang="en">dovecot RA</shortdesc> <actions> <action name="start" timeout="1m"/> <action name="stop" timeout="1m"/> <action name="monitor" interval="30s" timeout="20s" start-delay="1m" /> <action name="validate-all" timeout="5s" /> <action name="meta-data" timeout="5s" /> </actions> </resource-agent> EOF }

exec="/usr/sbin/dovecot" bin=$(basename $exec) config="/etc/dovecot.conf"

start () {

[ -x $exec ] || {
	echo >&2 "** $exec not executable"
	return $OCF_ERR_GENERIC
}
    [ -f $config ] || {
            echo >&2 "** $config doesn't exist"
            return $OCF_ERR_GENERIC
    }

local pid=$(dovecot_pid)
if [ "$pid" ]; then
	echo >&2 "dovecot already running"
		return $OCF_SUCCESS
elif $exec; then
local pid=$(dovecot_pid)
  if [ "$pid" ]; then
	    return $OCF_SUCCESS
	else
	    echo >&2 "** no dovecot pid"
	    return $OCF_ERR_GENERIC
	fi
  else
	echo >&2 "** $bin fails to start"
	return $OCF_ERR_GENERIC
  fi

}

stop () { local pid=$(dovecot_pid) echo $pid if [ "$pid" ]; then if killpid $pid; then return $OCF_SUCCESS else echo >&2 "** killpid $pid: fails" return $OCF_ERR_GENERIC fi else return $OCF_SUCCESS fi }

status () { # Seems to not be used by heartbeat return }

monitor () { local pid=$(dovecot_pid) if [ "$pid" ]; then MYSTATUS=echo ". logout" | nc localhost 143 | grep "ready" | wc -l if [ "$MYSTATUS" -eq "1" ]; then return $OCF_SUCCESS else return $OCF_ERR_GENERIC fi else return $OCF_NOT_RUNNING fi }

validate_all () { return }

#---+ Utilitaires

dovecot_pid () { pidof $bin }

# Check if $pid (could be plural) are running checkpid() { local i

for i in $* ; do
    [ -d "/proc/$i" ] && return 0
done
return 1

}

killpid () { # Repris depuis /etc/init.d/functions:killproc # killpid <pid> [<delai en secondes>] # FIXME: faire faire ca par lps -k ou autre option?

local pid=$1
local delay=${2:-3}

# Succes si pas de process
checkpid $pid || return 0

# TERM first, then KILL if not dead
kill -TERM $pid
usleep 100000
if checkpid $pid && sleep 1 &&
    checkpid $pid && sleep $delay &&
    checkpid $pid ; then
    kill -KILL $pid
    usleep 100000
fi
if checkpid $pid; then
    return 1
else
    return 0
fi

}

#---+ Debug [[ $0 == *bash ]] && return

#---+ Main

if [ $# -eq 0 ] then usage exit $OCF_ERR_ARGS fi

# PATH

source /usr/local/bashutil/autoload_lib autoload_lib /usr/local/bashutil/lib/batch

case $1 in start) start ;; stop) stop ;; status) status ;; monitor) monitor ;; meta-data) meta_data;; validate-all ) validate_all;; *) usage exit $OCF_ERR_UNIMPLEMENTED ;; esac