Raoul Bhatia [IPAX] wrote:
> i'm reworking my script right now. commenting inline.
i just finished updating the postfix ocf ra and am summarizing the
changes:
* isRunning() stays as this is also used in other ras
* i left running() as well (where i check the master.pid file)
but am ready to rewrite it to use "postqueue -p" or "postfix status"
in addition or exclusively - waiting for your feedback
* i removed $() bashism
* removed "pid=$(sed 's/ //g' ${queue}/pid/master.pid)"
* as of now, removed the postfix_monitor check on "stop"
* waiting 5 seconds for postfix shutdown, then escalating to "abort"
* removed exits inside the functions and replaced it with return.
did i miss something from your feedback?
do you have any further comments?
thanks,
raoul
--
____________________________________________________________________
DI (FH) Raoul Bhatia M.Sc. email. [email protected]
Technischer Leiter
IPAX - Aloy Bhatia Hava OEG web. http://www.ipax.at
Barawitzkagasse 10/2/2/11 email. [email protected]
1190 Wien tel. +43 1 3670030
FN 277995t HG Wien fax. +43 1 3670030 15
____________________________________________________________________
#!/bin/sh
#
# Resource script for Postfix
#
# Description: Manages Postfix as an OCF resource in
# an high-availability setup.
#
# Tested with postfix 2.5.5 on Debian 5.0.
# Based on the mysql-proxy and mysql OCF resource agents.
#
# Author: Raoul Bhatia <[email protected]> : Original Author
# License: GNU General Public License (GPL)
# Note: if you want to run multiple postfix instances, please see
#
http://amd.co.at/adminwiki/Postfix#Adding_a_Second_Postfix_Instance_on_one_Server
# http://www.postfix.org/postconf.5.html
#
#
# usage: $0 {start|stop|reload|status|monitor|validate-all|meta-data}
#
# The "start" arg starts a Postfix instance
#
# The "stop" arg stops it.
#
#
# Test via
# * /usr/sbin/ocf-tester -n post1 /usr/lib/ocf/resource.d/heartbeat/postfix
# * /usr/sbin/ocf-tester -n post1 -o binary="/usr/sbin/postfix"
# -o config_dir="" /usr/lib/ocf/resource.d/heartbeat/postfix
# * /usr/sbin/ocf-tester -n post1 -o binary="/usr/sbin/postfix"
# -o config_dir="/root/postfix/" /usr/lib/ocf/resource.d/heartbeat/postfix
#
#
# OCF parameters:
# OCF_RESKEY_binary
# OCF_RESKEY_config_dir
# OCF_RESKEY_parameters
#
##########################################################################
# Initialization:
. ${OCF_ROOT}/resource.d/heartbeat/.ocf-shellfuncs
: ${OCF_RESKEY_binary="/usr/sbin/postfix"}
: ${OCF_RESKEY_config_dir=""}
: ${OCF_RESKEY_parameters=""}
USAGE="Usage: $0 {start|stop|reload|status|monitor|validate-all|meta-data}";
##########################################################################
usage() {
echo $USAGE >&2
}
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="postfix">
<version>0.1</version>
<longdesc lang="en">
This script manages Postfix as an OCF resource in a high-availability setup.
Tested with Postfix 2.5.5 on Debian 5.0.
</longdesc>
<shortdesc lang="en">OCF Resource Agent compliant Postfix script.</shortdesc>
<parameters>
<parameter name="binary" unique="0" required="0">
<longdesc lang="en">
Full path to the Postfix binary.
For example, "/usr/sbin/postfix".
</longdesc>
<shortdesc lang="en">Full path to Postfix binary</shortdesc>
<content type="string" default="/usr/sbin/postfix" />
</parameter>
<parameter name="config_dir" unique="1" required="0">
<longdesc lang="en">
Full path to a Postfix configuration directory.
For example, "/etc/postfix".
</longdesc>
<shortdesc lang="en">Full path to configuration directory</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="parameters" unique="0" required="0">
<longdesc lang="en">
The Postfix daemon may be called with additional parameters.
Specify any of them here.
</longdesc>
<shortdesc lang="en"></shortdesc>
<content type="string" default="" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="90" />
<action name="stop" timeout="100" />
<action name="reload" timeout="100" />
<action name="monitor" depth="10" timeout="20s" interval="60s" start-delay="0"
/>
<action name="validate-all" timeout="30s" />
<action name="meta-data" timeout="5s" />
</actions>
</resource-agent>
END
}
isRunning()
{
kill -0 "$1" 2>/dev/null
}
# running() has been copied from debian's init script. we enhanced it a bit
# @TODO rb 2009-06-23 maybe try "postqueue -p 2>&1 | head -n1 | grep 'Mail
system is down' && false
# @TODO rb 2009-06-23 maybe try "$binary $OPTIONS status" instead?
running() {
queue=`postconf $OPTION_CONFIG_DIR -h queue_directory 2>/dev/null || echo
/var/spool/postfix`
pid_dir=`postconf $OPTION_CONFIG_DIR -h process_id_directory 2>/dev/null`
pidfile="${queue}/${pid_dir}/master.pid"
if [ -f "${pidfile}" ]; then
# @TODO Could the master process become zombie?
pid=`cat ${pidfile}`
if isRunning $pid; then
# @TODO why does "true" not work here?
#true
return $OCF_SUCCESS
fi
fi
# Postfix is not running
false
}
postfix_status()
{
running
}
postfix_start()
{
# if Postfix is running return success
if postfix_status; then
ocf_log info "Postfix already running."
return $OCF_SUCCESS
fi
# start Postfix
$binary $OPTIONS start >/dev/null 2>&1
ret=$?
if [ $ret -ne 0 ]; then
ocf_log err "Postfix returned error." $ret
return $OCF_ERR_GENERIC
fi
return $OCF_SUCCESS
}
postfix_stop()
{
$binary $OPTIONS stop >/dev/null 2>&1
ret=$?
if [ $ret -ne 0 ]; then
ocf_log err "Postfix returned an error while stopping." $ret
return $OCF_ERR_GENERIC
fi
# grant some time for shutdown and recheck 5 times
for i in 1 2 3 4 5; do
if postfix_status; then
sleep 1
fi
done
# escalate to abort if we did not stop by now
# @TODO shall we loop here too?
if postfix_status; then
ocf_log err "Postfix failed to stop. Escalating to 'abort'"
$binary $OPTIONS abort >/dev/null 2>&1; ret=$?
sleep 5
postfix_status && $OCF_ERR_GENERIC
fi
return $OCF_SUCCESS
}
postfix_reload()
{
if postfix_status; then
ocf_log info "Reloading Postfix."
$binary $OPTIONS reload
fi
}
postfix_monitor()
{
if postfix_status; then
return $OCF_SUCCESS
fi
return $OCF_NOT_RUNNING
}
postfix_validate_all()
{
# check that the Postfix binary exists and can be executed
if [ ! -x "$binary" ]; then
ocf_log err "Postfix binary '$binary' does not exist or cannot be
executed."
return $OCF_ERR_GENERIC
fi
# check config_dir and alternate_config_directories parameter
if [ "x$config_dir" != "x" ]; then
if [ ! -d "$config_dir" ]; then
ocf_log err "Postfix configuration directory '$config_dir' does not
exist." $ret
return $OCF_ERR_GENERIC
fi
alternate_config_directories=`postconf -h alternate_config_directories
2>/dev/null | grep $config_dir`
if [ "x$alternate_config_directories" = "x" ]; then
ocf_log err "Postfix main configuration must contain correct
'alternate_config_directories' parameter."
return $OCF_ERR_GENERIC
fi
fi
# check spool/queue directory
queue=`postconf $OPTION_CONFIG_DIR -h queue_directory 2>/dev/null || echo
/var/spool/postfix`
if [ ! -d "$queue" ]; then
ocf_log err "Postfix spool/queue directory '$queue' does not exist."
$ret
return $OCF_ERR_GENERIC
fi
# run postfix internal check
$binary $OPTIONS check >/dev/null 2>&1
ret=$?
if [ $ret -ne 0 ]; then
ocf_log err "Postfix 'check' failed." $ret
return $OCF_ERR_GENERIC
fi
return $OCF_SUCCESS
}
#
# Main
#
if [ $# -ne 1 ]; then
usage
exit $OCF_ERR_ARGS
fi
binary=$OCF_RESKEY_binary
config_dir=$OCF_RESKEY_config_dir
parameters=$OCF_RESKEY_parameters
# debugging stuff
#echo OCF_RESKEY_binary=$OCF_RESKEY_binary >>
/tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_config_dir=$OCF_RESKEY_config_dir >>
/tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_parameters=$OCF_RESKEY_parameters >>
/tmp/prox_conf_$OCF_RESOURCE_INSTANCE
# build postfix options string *outside* to access from each method
OPTIONS=''
OPTION_CONFIG_DIR=''
# check if the Postfix config_dir exist
if [ "x$config_dir" != "x" ]; then
# save OPTION_CONFIG_DIR seperatly
OPTION_CONFIG_DIR="-c $config_dir"
OPTIONS=$OPTION_CONFIG_DIR
fi
if [ "x$parameters" != "x" ]; then
OPTIONS="$OPTIONS $parameters"
fi
case $1 in
meta-data) meta_data
exit $OCF_SUCCESS
;;
usage|help) usage
exit $OCF_SUCCESS
;;
esac
postfix_validate_all
ret=$?
#echo "debug[$1:$ret]"
LSB_STATUS_STOPPED=3
if [ $ret -ne $OCF_SUCCESS ]; then
case $1 in
stop) exit $OCF_SUCCESS ;;
monitor) exit $OCF_NOT_RUNNING;;
status) exit $LSB_STATUS_STOPPED;;
*) exit $ret;;
esac
fi
case $1 in
monitor) postfix_monitor
exit $?
;;
start) postfix_start
exit $?
;;
stop) postfix_stop
exit $?
;;
reload) postfix_reload
exit $?
;;
status) if postfix_status; then
ocf_log info "Postfix is running."
exit $OCF_SUCCESS
else
ocf_log info "Postfix is stopped."
exit $OCF_NOT_RUNNING
fi
;;
monitor) postfix_monitor
exit $?
;;
validate-all) exit $OCF_SUCCESS
;;
*) usage
exit $OCF_ERR_UNIMPLEMENTED
;;
esac
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