IPv6addrLO

#!/bin/bash
#
#       OCF Resource Agent compliant resource script.
#   Arturo Borrero <aborrero@cica.es> || October 2011
#
#   Based on the anything RA.
#
#   GPLv3 Licensed. You can read the license in
#   http://www.gnu.org/licenses/gpl-3.0.html
#
# Initialization:

: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/resource.d/heartbeat}
. ${OCF_FUNCTIONS_DIR}/.ocf-shellfuncs

# Custom vars:
IFCONFIG_BIN="/sbin/ifconfig"
GREP_BIN="grep"
IFACE="lo"
process=$OCF_RESOURCE_INSTANCE
ipv6addr=$OCF_RESKEY_ipv6addr
cidr_netmask=$OCF_RESKEY_cidr_netmask
pidfile=$OCF_RESKEY_pidfile ; [ -z "$pidfile" ] && pidfile=${HA_VARRUN}IPv6addrLO_${process}.pid
logfile=$OCF_RESKEY_logfile ; [ -z "$logfile" ] && logfile="/var/log/syslog"
errlogfile=$OCF_RESKEY_errlogfile ; [ -z "$errlogfile" ] && errlogfile="/var/log/syslog"


validate_ipv6(){
    ocf_log debug "Validating IPv6 addr: [\"$1\"]."

    echo "$1" | $GREP_BIN -E "^\s*((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}))|:)))(%.+)?\s*$" > /dev/null
    if [ $? -eq 0 ]
    then
        # the ipv6 is valid
        ocf_log debug "IPv6 addr: [\"$1\"] is valid."
        return 1
    fi
    # the ipv6 is invalid
    ocf_log err "IPv6 addr: [\"$1\"] is not valid."
    return 0
}
validate_cidr(){
    ocf_log debug "Validating cidr: \"$1\"."

    if [ $1 -lt 129 ]
    then
        if [ $1 -gt 0 ]
        then
            # the cidr is valid
            ocf_log debug "Cidr: \"$1\" is valid."
            return 1
        fi
    fi
    ocf_log err "Cidr: \"$1\" is not valid."
    return 0
}

iface_has_ipv6()
{
    ocf_log debug "Checking if iface \"$IFACE\" has the ipv6 [\"$ipv6addr\"]."
    if [ ! -z $1 ]
    then
        $IFCONFIG_BIN $IFACE | $GREP_BIN $1 2> /dev/null > /dev/null
        if [ $? -eq 0 ]
        then
            # the iface has the IPv6
            ocf_log info "The iface \"$IFACE\" has the ipv6 [\"$ipv6addr\"]."
            return 1
        fi
        ocf_log info "The iface \"$IFACE\" does not have the ipv6 [\"$ipv6addr\"]."
    fi
    return 0
}

IPv6addrLO_status() {
    # Will check that the system has the ipv6 saved in the pidfile
    if [ -r $pidfile ]
    then
        ocf_log debug "STATUS: The pidfile \"$pidfile\" exists."

        validate_ipv6 `cat $pidfile | awk -F'/' '{print $1}'`
        if [ $? -eq 1 ]
        then
            # the ipv6 stored in pidfile is valid, then check if the system has that ip
            iface_has_ipv6 `cat $pidfile`
            if [ $? -eq 1 ]
            then
                ocf_log info "The iface \"$IFACE\" has the IPv6 \"[`cat $pidfile`]\" stored in \"$pidfile\"."
                return $OCF_RUNNING
            else
                ocf_log err "When checking status, the iface \"$IFACE\" has nor the IPv6 of the \"$pidfile\" nor \"$ipv6addr\"."
                return $OCF_ERR_GENERIC
            fi
        else
            ocf_log err "The ipv6addr in \"$pidfile\" is not valid: [\"`cat $pidfile`\"]."
            return $OCF_ERR_GENERIC
        fi
    fi
    ocf_log debug  "The pidfile \"$pidfile\" don't exists."
    return $OCF_NOT_RUNNING
}

IPv6addrLO_start() {
    if ! IPv6addrLO_status
    then
        # First, validate the input parameteres, ipv6addr and cidr_netmaks
        validate_ipv6 $ipv6addr
        if [ $? -ne 1 ]
        then
            ocf_log err "$process: The ipv6 addr: \"$ipv6addr\" is not a valid one."
            return $OCF_ERR_GENERIC
        fi
        validate_cidr $cidr_netmask
        if [ $? -ne 1 ]
        then
            ocf_log err "$process: The cidr netmask \"$cidr_netmask\" is not valid."
            return $OCF_ERR_GENERIC
        fi


        # Before assign the ip, check if we already have that ip
        # because maybe we had a sudden reboot and the ipv6 is still on lo.
        iface_has_ipv6 $ipv6addr
        if [ $? -eq 1 ]
        then
            # we have the IPv6addr on loopback
            ocf_log info "The iface \"$IFACE\" had the IPv6 addr [\"$ipv6addr/$cidr_netmask\"], don't assigning again."
            touch $pidfile
            if [ $? -ne 0 ]
            then
                ocf_log war "Could not create the pidfile \"$pidfile\"."
            fi
            echo "$ipv6addr/$cidr_netmask" > $pidfile
            if [ $? -ne 0 ]
            then
                ocf_log err "Failed to manage the new pidfile for \"$ipv6addr/\$cidr_netmask\"."
            fi
        else
            # we don't have the IPv6addr on loopback
            ocf_log info "Starting $process"

            # Doing different depending on what logfile we have.
            if [ -n "$logfile" -a -n "$errlogfile" ]
            then
                # We have logfile and errlogfile, so redirect STDOUT und STDERR to different files
                $IFCONFIG_BIN $IFACE add $ipv6addr/$cidr_netmask >> $logfile 2>> $errlogfile
            else
                if [ -n "$logfile" ]
                then
                    # We only have logfile so redirect STDOUT and STDERR to the same file
                    $IFCONFIG_BIN $IFACE add $ipv6addr/$cidr_netmask >> $logfile 2>&1
                else
                    # We have neither logfile nor errlogfile, so we're not going to redirect anything
                    $IFCONFIG_BIN $IFACE add $ipv6addr/$cidr_netmask
                fi
            fi
            echo "$ipv6addr/$cidr_netmask" > $pidfile
        fi

        # Check what happened here.
        if IPv6addrLO_status
        then
            ocf_log info "$process: Started successfully."
            return $OCF_SUCCESS
        else
            ocf_log err "$process: Could not be started: ipv6addr[\"$ipv6addr\"] cidr_netmask[\"$cidr_netmask\"]."
            return $OCF_ERR_GENERIC
        fi
    else
        # If already running, consider start successful
        ocf_log debug "$process: is already running"
        return $OCF_SUCCESS
    fi
}

IPv6addrLO_stop() {

    ocf_log debug "$process: Running STOP function."

        if [ -n "$OCF_RESKEY_stop_timeout" ]
        then
                stop_timeout=$OCF_RESKEY_stop_timeout
        elif [ -n "$OCF_RESKEY_CRM_meta_timeout" ]; then
                # Allow 2/3 of the action timeout for the orderly shutdown
                # (The origin unit is ms, hence the conversion)
                stop_timeout=$((OCF_RESKEY_CRM_meta_timeout/1500))
        else
                stop_timeout=10
        fi
    if IPv6addrLO_status
    then
        $IFCONFIG_BIN $IFACE del `cat $pidfile`
                i=0
                while [ $i -lt $stop_timeout ]
                do
                        if ! IPv6addrLO_status
                        then
                            rm -f $pidfile
                                return $OCF_SUCCESS
                        fi
                        sleep 1
                        i=`expr $i + 1`
                done
                ocf_log warn "Stop failed. Trying again."
                $IFCONFIG_BIN $IFACE del `cat $pidfile`
                rm -f $pidfile
                if ! IPv6addrLO_status
                then
                        ocf_log warn "Stop success."
                        return $OCF_SUCCESS
                else
                        ocf_log err "Failed to stop."
                        return $OCF_ERR_GENERIC
                fi
    else
        # was not running, so stop can be considered successful
        $ICONFIG_BIN $IFACE del `cat $pidfile`
        rm -f $pidfile
        return $OCF_SUCCESS
    fi
}

IPv6addrLO_monitor() {
    IPv6addrLO_status
    ret=$?
    if [ $ret -eq $OCF_SUCCESS ]
    then
        if [ -n "$OCF_RESKEY_monitor_hook" ]; then
            eval "$OCF_RESKEY_monitor_hook"
                        if [ $? -ne $OCF_SUCCESS ]; then
                                return ${OCF_ERR_GENERIC}
                        fi
            return $OCF_SUCCESS
        else
            true
        fi
    else
        return $ret
    fi
}


IPv6addrLO_validate() {

    ocf_log debug "IPv6addrLO validating: args:[\"$*\"]"

    if [ -x $IFCONFIG_BIN ]
    then
        ocf_log debug "Binary \"$IFCONFIG_BIN\" exist and is executable."
        return $OCF_SUCCESS
    else
        ocf_log err "Binary \"$IFCONFIG_BIN\" does not exist or isn't executable."
        return $OCF_ERR_INSTALLED
    fi
    ocf_log err "Error while validating."
    return $OCF_ERR_GENERIC
}

IPv6addrLO_meta(){
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="IPv6addrLO">
<version>0.1</version>
<longdesc lang="en">
OCF RA to manage IPv6addr on loopback interface Linux
</longdesc>
<shortdesc lang="en">IPv6 addr on loopback linux</shortdesc>

<parameters>
<parameter name="ipv6addr" required="1">
<longdesc lang="en">
The ipv6 addr to asign to the loopback interface.
</longdesc>
<shortdesc lang="en">Ipv6 addr to the loopback interface.</shortdesc>
<content type="string" default=""/>
</parameter>
<parameter name="cidr_netmask" required="1">
<longdesc lang="en">
The cidr netmask of the ipv6 addr.
</longdesc>
<shortdesc lang="en">netmask of the ipv6 addr.</shortdesc>
<content type="string" default="128"/>
</parameter>
<parameter name="logfile" required="0">
<longdesc lang="en">
File to write STDOUT to
</longdesc>
<shortdesc lang="en">File to write STDOUT to</shortdesc>
<content type="string" />
</parameter>
<parameter name="errlogfile" required="0">
<longdesc lang="en">
File to write STDERR to
</longdesc>
<shortdesc lang="en">File to write STDERR to</shortdesc>
<content type="string" />
</parameter>
</parameters>
<actions>
<action name="start"   timeout="20s" />
<action name="stop"    timeout="20s" />
<action name="monitor" depth="0"  timeout="20s" interval="10" />
<action name="meta-data"  timeout="5" />
<action name="validate-all"  timeout="5" />
</actions>
</resource-agent>
END
exit 0
}

case "$1" in
    meta-data|metadata|meta_data|meta)
        IPv6addrLO_meta
    ;;
    start)
        IPv6addrLO_start
    ;;
    stop)
        IPv6addrLO_stop
    ;;
    monitor)
        IPv6addrLO_monitor
    ;;
    validate-all)
        IPv6addrLO_validate
    ;;
    *)
        ocf_log err "$0 was called with unsupported arguments:"
        exit $OCF_ERR_UNIMPLEMENTED
    ;;
esac