#!/bin/sh
#
#
# opensips
#
# Description:  Manages an Opensips as an HA resource
#


: ${OCF_FUNCTIONS_DIR=/usr/lib/ocf/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs

#######################################################################

# Fill in some defaults if no values are specified
HOSTOS=`uname`

OCF_RESKEY_user_default="root"
OCF_RESKEY_group_default="root"

#OCF_RESKEY_binary_default="opensips"
#OCF_RESKEY_canary_binary_default="astcanary"
#OCF_RESKEY_config_default="/etc/opensips/opensips.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 Opensips as an HA resource.

        The 'start' operation starts Opensips.
        The 'stop' operation stops Opensips.
        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 opensips is running
        The 'monitor' operation reports whether opensips  seems to be working

UEND
}

meta_data() {
    cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="opensips">
<version>1.0</version>

<longdesc lang="en">
Resource agent for the opensips
May manage an opensips in MOR High Availability Cluster setup
</longdesc>
<shortdesc lang="en">Manages an opensips</shortdesc>

<actions>
<action name="start" timeout="20s" />
<action name="stop" timeout="20s" />
<action name="status" timeout="20s" />
<action name="monitor" timeout="30s" interval="20s" />
<action name="validate-all" timeout="5s" />
<action name="meta-data" timeout="5s" />
</actions>
</resource-agent>
END
}

# Functions invoked by resource manager actions

opensips_validate() {
    true
}

opensips_status() {

    if systemctl is-active --quiet opensips; then
        return $OCF_SUCCESS
    else
        ocf_log info "Opensips is not running"
        return $OCF_NOT_RUNNING
    fi
}

opensips_monitor() {

    local rc
    
    #Check if opensips is running
    opensips_status
    rc=$?

    # If status returned an error, return that immediately
    if [ $rc -ne $OCF_SUCCESS ]; then
        return $rc
    fi

    # Put any other monitoring logging check here:
    # Cheeck if not freezed, if respond to sipsak, whatever

    ocf_log debug "Opensips monitor succeeded"
    return $OCF_SUCCESS
}

opensips_start() {

    local rc

    if systemctl is-active --quiet opensips; then
        ocf_log info "Opensips already running"
        return $OCF_SUCCESS
    fi
    systemctl start opensips 2>/dev/null
   
    # Spin waiting for the server to come up.
    # Let the CRM/LRM time us out if required
    while true; do
        opensips_monitor
        rc=$?
        [ $rc -eq $OCF_SUCCESS ] && break
        if [ $rc -ne $OCF_NOT_RUNNING ]; then
            ocf_log err "Opensips start failed"
            exit $OCF_ERR_GENERIC
        fi
        sleep 2
    done

    ocf_log info "Opensips started"
    return $OCF_SUCCESS
}

opensips_stop() {
 
    local rc

    opensips_status
    rc=$?
    if [ $rc -eq $OCF_NOT_RUNNING ]; then
        ocf_log info "Opensips already stopped"
        return $OCF_SUCCESS
    fi

    systemctl stop opensips

    # 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 $shutdown_timeout ]; do
        opensips_status
        rc=$?
        if [ $rc -eq $OCF_NOT_RUNNING ]; then
            break
        fi
        count=`expr $count + 1`
        sleep 1
        ocf_log debug "Opensips still hasn't stopped yet. Waiting ..."
    done

    opensips_status
    rc=$?
    if [ $rc -ne $OCF_NOT_RUNNING ]; then
        ocf_log info "Opensis failed to stop after ${shutdown_timeout}s. Trying SIGKILL ..."
        ocf_run pkill -9 opensips
    fi

    ocf_log info "Opensips 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
opensips_validate || exit $?

# What kind of method was invoked?
case "$1" in
  start)        opensips_start;;
  stop)         opensips_stop;;
  status)       opensips_status;;
  monitor)      opensips_monitor;;
  validate-all) ;;
  *)            usage
                exit $OCF_ERR_UNIMPLEMENTED;;
esac