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#!/bin/sh
#
#
# Asterisk
#
# Description: Manages an Asterisk PBX as an HA resource
#
# Authors: Martin Gerhard Loschwitz
# Florian Haas
#
# Support: linux-ha@lists.linux-ha.org
# License: GNU General Public License (GPL)
#
# (c) 2011 hastexo Professional Services GmbH
#
# This resource agent is losely derived from the MySQL resource
# agent, which itself is made available to the public under the
# following copyright:
#
# (c) 2002-2005 International Business Machines, Inc.
# 2005-2010 Linux-HA contributors
#
# See usage() function below for more details ...
#
# OCF instance parameters:
# OCF_RESKEY_binary
# OCF_RESKEY_canary_binary
# OCF_RESKEY_config
# OCF_RESKEY_user
# OCF_RESKEY_group
# OCF_RESKEY_additional_parameters
# OCF_RESKEY_realtime
# OCF_RESKEY_maxfiles
#######################################################################
# Initialization:
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
#######################################################################
# Fill in some defaults if no values are specified
HOSTOS=`uname`
if [ "X${HOSTOS}" = "XOpenBSD" ]; then
OCF_RESKEY_user_default="_asterisk"
OCF_RESKEY_group_default="_asterisk"
else
OCF_RESKEY_user_default="asterisk"
OCF_RESKEY_group_default="asterisk"
fi
OCF_RESKEY_binary_default="asterisk"
OCF_RESKEY_canary_binary_default="astcanary"
OCF_RESKEY_config_default="/etc/asterisk/asterisk.conf"
OCF_RESKEY_additional_parameters_default="-g -vvv"
OCF_RESKEY_realtime_default="false"
OCF_RESKEY_maxfiles_default="8192"
: ${OCF_RESKEY_binary=${OCF_RESKEY_binary_default}}
: ${OCF_RESKEY_canary_binary=${OCF_RESKEY_canary_binary_default}}
: ${OCF_RESKEY_config=${OCF_RESKEY_config_default}}
: ${OCF_RESKEY_user=${OCF_RESKEY_user_default}}
: ${OCF_RESKEY_group=${OCF_RESKEY_group_default}}
: ${OCF_RESKEY_additional_parameters=${OCF_RESKEY_additional_parameters_default}}
: ${OCF_RESKEY_realtime=${OCF_RESKEY_realtime_default}}
: ${OCF_RESKEY_maxfiles=${OCF_RESKEY_maxfiles_default}}
#######################################################################
usage() {
cat <<UEND
usage: $0 (start|stop|validate-all|meta-data|status|monitor)
$0 manages an Asterisk PBX as an HA resource.
The 'start' operation starts the database.
The 'stop' operation stops the database.
The 'validate-all' operation reports whether the parameters are valid
The 'meta-data' operation reports this RA's meta-data information
The 'status' operation reports whether the database is running
The 'monitor' operation reports whether the database seems to be working
UEND
}
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="asterisk">
<version>1.0</version>
<longdesc lang="en">
Resource agent for the Asterisk PBX.
May manage an Asterisk PBX telephony system or a clone set that
forms an Asterisk distributed device setup.
</longdesc>
<shortdesc lang="en">Manages an Asterisk PBX</shortdesc>
<parameters>
<parameter name="binary" unique="0" required="0">
<longdesc lang="en">
Location of the Asterisk PBX server binary
</longdesc>
<shortdesc lang="en">Asterisk PBX server binary</shortdesc>
<content type="string" default="${OCF_RESKEY_binary_default}" />
</parameter>
<parameter name="canary_binary" unique="0" required="0">
<longdesc lang="en">
Location of the Asterisk PBX Canary server binary
</longdesc>
<shortdesc lang="en">Asterisk PBX Canary server binary</shortdesc>
<content type="string" default="${OCF_RESKEY_canary_binary_default}" />
</parameter>
<parameter name="config" unique="0" required="0">
<longdesc lang="en">
The Asterisk PBX configuration file
</longdesc>
<shortdesc lang="en">Asterisk PBX config</shortdesc>
<content type="string" default="${OCF_RESKEY_config_default}" />
</parameter>
<parameter name="user" unique="0" required="0">
<longdesc lang="en">
User running Asterisk PBX daemon
</longdesc>
<shortdesc lang="en">Asterisk PBX user</shortdesc>
<content type="string" default="${OCF_RESKEY_user_default}" />
</parameter>
<parameter name="group" unique="0" required="0">
<longdesc lang="en">
Group running Asterisk PBX daemon (for logfile and directory permissions)
</longdesc>
<shortdesc lang="en">Asterisk PBX group</shortdesc>
<content type="string" default="${OCF_RESKEY_group_default}" />
</parameter>
<parameter name="additional_parameters" unique="0" required="0">
<longdesc lang="en">
Additional parameters which are passed to the Asterisk PBX on
startup (e.g. -L &lt;load&gt; or -M &lt;value&gt;).
</longdesc>
<shortdesc lang="en">Additional parameters to pass to the Asterisk PBX</shortdesc>
<content type="string" default="${OCF_RESKEY_additional_parameters_default}" />
</parameter>
<parameter name="realtime" unique="0" required="0">
<longdesc lang="en">
Determines whether the Asterisk PBX daemon will be run with
realtime priority or not.
</longdesc>
<shortdesc lang="en">Asterisk PBX realtime priority</shortdesc>
<content type="boolean" default="${OCF_RESKEY_realtime_default}" />
</parameter>
<parameter name="maxfiles" unique="0" required="0">
<longdesc lang="en">
Determines how many files the Asterisk PBX is allowed to open at
a time. Helps to fix the 'Too many open files' error message.
</longdesc>
<shortdesc lang="en">Asterisk PBX allowed MAXFILES</shortdesc>
<content type="integer" default="${OCF_RESKEY_maxfiles_default}" />
</parameter>
<parameter name="monitor_sipuri" unique="0" required="0">
<longdesc lang="en">
A SIP URI to check when monitoring. During monitor, the agent will
attempt to do a SIP OPTIONS request against this URI.
Requires the sipsak utility to be present and executable.
If unset, the agent does no SIP URI monitoring.
</longdesc>
<shortdesc lang="en">SIP URI to check when monitoring</shortdesc>
<content type="string" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="20" />
<action name="stop" timeout="20" />
<action name="status" timeout="20" />
<action name="monitor" timeout="30" interval="20" />
<action name="validate-all" timeout="5" />
<action name="meta-data" timeout="5" />
</actions>
</resource-agent>
END
}
#######################################################################
# Convenience functions
asterisk_rx() {
# if $HOME is set, asterisk -rx writes a .asterisk_history there
(
unset HOME
ocf_run $OCF_RESKEY_binary -r -s $ASTRUNDIR/asterisk.ctl -x "$1"
)
}
#######################################################################
# Functions invoked by resource manager actions
asterisk_validate() {
local rc
check_binary $OCF_RESKEY_binary
check_binary pgrep
if [ -n "$OCF_RESKEY_monitor_sipuri" ]; then
check_binary sipsak
fi
# A config file on shared storage that is not available
# during probes is OK.
if [ ! -f $OCF_RESKEY_config ]; then
if ! ocf_is_probe; then
ocf_log err "Config $OCF_RESKEY_config doesn't exist"
return $OCF_ERR_INSTALLED
fi
ocf_log warn "Config $OCF_RESKEY_config not available during a probe"
fi
getent passwd $OCF_RESKEY_user >/dev/null 2>&1
rc=$?
if [ $rc -ne 0 ]; then
ocf_log err "User $OCF_RESKEY_user doesn't exist"
return $OCF_ERR_INSTALLED
fi
getent group $OCF_RESKEY_group >/dev/null 2>&1
rc=$?
if [ $rc -ne 0 ]; then
ocf_log err "Group $OCF_RESKEY_group doesn't exist"
return $OCF_ERR_INSTALLED
fi
true
}
asterisk_status() {
local pid
local rc
if [ ! -f $ASTRUNDIR/asterisk.pid ]; then
ocf_log info "Asterisk PBX is not running"
return $OCF_NOT_RUNNING
fi
pid=`cat $ASTRUNDIR/asterisk.pid`
ocf_run kill -s 0 $pid
rc=$?
if [ $rc -eq 0 ]; then
if ocf_is_true "$OCF_RESKEY_realtime"; then
astcanary_pid=`pgrep -d " " -f "astcanary $ASTRUNDIR/alt.asterisk.canary.tweet.tweet.tweet"`
if [ ! "$astcanary_pid" ]; then
ocf_log err "Asterisk PBX is running but astcanary is not although it should"
return $OCF_ERR_GENERIC
fi
else
return $OCF_SUCCESS
fi
else
ocf_log info "Asterisk PBX not running: removing old PID file"
rm -f $ASTRUNDIR/asterisk.pid
return $OCF_NOT_RUNNING
fi
}
asterisk_monitor() {
local rc
asterisk_status
rc=$?
# If status returned an error, return that immediately
if [ $rc -ne $OCF_SUCCESS ]; then
return $rc
fi
# Check whether connecting to asterisk is possible
asterisk_rx 'core show channels count'
rc=$?
if [ $rc -ne 0 ]; then
if [ "$__OCF_ACTION" = "start" ]; then
ocf_log info "Asterisk PBX not running yet"
return $OCF_NOT_RUNNING;
else
ocf_log err "Failed to connect to the Asterisk PBX"
return $OCF_ERR_GENERIC;
fi
fi
# Optionally check the monitor URI with sipsak
# The return values:
# 0 means that a 200 was received.
# 1 means something else then 1xx or 2xx was received.
# 2 will be returned on local errors like non resolvable names
# or wrong options combination.
# 3 will be returned on remote errors like socket errors
# (e.g. icmp error), redirects without a contact header or
# simply no answer (timeout).
# This can also happen if sipsak is run too early after asterisk
# start.
if [ -n "$OCF_RESKEY_monitor_sipuri" ]; then
ocf_run sipsak -s "$OCF_RESKEY_monitor_sipuri"
rc=$?
case "$rc" in
1|2) return $OCF_ERR_GENERIC;;
3) return $OCF_NOT_RUNNING;;
esac
fi
ocf_log debug "Asterisk PBX monitor succeeded"
return $OCF_SUCCESS
}
asterisk_start() {
local asterisk_extra_params
local dir
local rc
asterisk_status
rc=$?
if [ $rc -eq $OCF_SUCCESS ]; then
ocf_log info "Asterisk PBX already running"
return $OCF_SUCCESS
fi
# If Asterisk is not already running, make sure there is no
# old astcanary instance when the new asterisk starts. To
# achieve this, kill old astcanary instances belonging to
# this $ASTRUNDIR.
# Find out PIDs of running astcanaries
astcanary_pid=`pgrep -d " " -f "astcanary $ASTRUNDIR/alt.asterisk.canary.tweet.tweet.tweet"`
# If there are astcanaries running that belong to $ASTRUNDIR,
# kill them.
if [ "$astcanary_pid" ]; then
for i in $astcanary_pid; do ocf_run kill -s KILL $astcanary_pid; done
fi
for dir in $ASTRUNDIR $ASTLOGDIR $ASTLOGDIR/cdr-csv $ASTLOGDIR/cdr-custom; do
if [ ! -d "$dir" ]; then
ocf_run install -d -o $OCF_RESKEY_user -g $OCF_RESKEY_group $dir \
|| exit $OCF_ERR_GENERIC
fi
# Regardless of whether we just created the directory or it
# already existed, check whether it is writable by the configured
# user
if ! su -s /bin/sh - $OCF_RESKEY_user -c "test -w $dir"; then
ocf_log err "Directory $dir is not writable by $OCF_RESKEY_user"
exit $OCF_ERR_PERM
fi
done
# set MAXFILES
ulimit -n $OCF_RESKEY_maxfiles
# Determine whether Asterisk PBX is supposed to run in Realtime mode
# or not and make asterisk daemonize automatically
if ocf_is_true "$OCF_RESKEY_realtime"; then
asterisk_extra_params="-F -p"
else
asterisk_extra_params="-F"
fi
ocf_run ${OCF_RESKEY_binary} -G $OCF_RESKEY_group -U $OCF_RESKEY_user \
-C $OCF_RESKEY_config \
$OCF_RESKEY_additional_parameters \
$asterisk_extra_params
rc=$?
if [ $rc -ne 0 ]; then
ocf_log err "Asterisk PBX start command failed: $rc"
exit $OCF_ERR_GENERIC
fi
# Spin waiting for the server to come up.
# Let the CRM/LRM time us out if required
while true; do
asterisk_monitor
rc=$?
[ $rc -eq $OCF_SUCCESS ] && break
if [ $rc -ne $OCF_NOT_RUNNING ]; then
ocf_log err "Asterisk PBX start failed"
exit $OCF_ERR_GENERIC
fi
sleep 2
done
ocf_log info "Asterisk PBX started"
return $OCF_SUCCESS
}
asterisk_stop() {
local pid
local astcanary_pid
local rc
asterisk_status
rc=$?
if [ $rc -eq $OCF_NOT_RUNNING ]; then
ocf_log info "Asterisk PBX already stopped"
return $OCF_SUCCESS
fi
pid=`cat $ASTRUNDIR/asterisk.pid`
ocf_run kill -s TERM $pid
rc=$?
if [ $rc -ne 0 ]; then
ocf_log err "Asterisk PBX couldn't be stopped"
exit $OCF_ERR_GENERIC
fi
# stop waiting
shutdown_timeout=15
if [ -n "$OCF_RESKEY_CRM_meta_timeout" ]; then
shutdown_timeout=$((($OCF_RESKEY_CRM_meta_timeout/1000)-5))
fi
count=0
while [ $count -lt $shutdown_timeout ]; do
asterisk_status
rc=$?
if [ $rc -eq $OCF_NOT_RUNNING ]; then
break
fi
count=`expr $count + 1`
sleep 1
ocf_log debug "Asterisk PBX still hasn't stopped yet. Waiting ..."
done
asterisk_status
rc=$?
if [ $rc -ne $OCF_NOT_RUNNING ]; then
# SIGTERM didn't help either, try SIGKILL
ocf_log info "Asterisk PBX failed to stop after ${shutdown_timeout}s using SIGTERM. Trying SIGKILL ..."
ocf_run kill -s KILL $pid
fi
# After killing asterisk, stop astcanary
if ocf_is_true "$OCF_RESKEY_realtime"; then
astcanary_pid=`pgrep -d " " -f "astcanary $ASTRUNDIR/alt.asterisk.canary.tweet.tweet.tweet"`
if [ "$astcanary_pid" ]; then
for i in $astcanary_pid; do ocf_run kill -s KILL $astcanary_pid; done
fi
fi
ocf_log info "Asterisk PBX stopped"
return $OCF_SUCCESS
}
#######################################################################
case "$1" in
meta-data) meta_data
exit $OCF_SUCCESS;;
usage|help) usage
exit $OCF_SUCCESS;;
esac
# Anything except meta-data and help must pass validation
asterisk_validate || exit $?
# Now that validate has passed and we can be sure to be able to read
# the config file, set convenience variables
ASTRUNDIR=`grep astrundir $OCF_RESKEY_config | awk '/^astrundir/ {print $3}'`
ASTLOGDIR=`grep astlogdir $OCF_RESKEY_config | awk '/^astlogdir/ {print $3}'`
# What kind of method was invoked?
case "$1" in
start) asterisk_start;;
stop) asterisk_stop;;
status) asterisk_status;;
monitor) asterisk_monitor;;
validate-all) ;;
*) usage
exit $OCF_ERR_UNIMPLEMENTED;;
esac
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