Corosync と Pacemaker を利用して複数の EIP をインスタンス間で付け替えるスクリプトアルファ版

gistfile1.sh

#!/bin/sh
#
#
#       Resource Agent for AWS EC2 EIP
#
# Copyright (c) 2014 mooapp All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like.  Any license provided herein, whether implied or
# otherwise, applies only to this software file.  Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#

#######################################################################
# Initialization:

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

#. /usr/lib/ocf/lib/heartbeat/ocf-shellfuncs

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

meta_data() {
        cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="eip" version="0.9">
<version>1.0</version>

<longdesc lang="en">
This is a Resource Agent for AWS EC2 EIP (Elastic IP Address).
</longdesc>
<shortdesc lang="en">AWS EC2 EIP resource agent</shortdesc>

<parameters>
<parameter name="elastic_ip" required="1">
<longdesc lang="en">
The Elastic IP address
</longdesc>
<shortdesc lang="en">EIP</shortdesc>
<content type="string" />
</parameter>
<parameter name="eip_if" required="1">
<longdesc lang="en">
The Elastic IP address attached Interface
</longdesc>
<shortdesc lang="en">EIP_IF</shortdesc>
<content type="string" />
</parameter>


</parameters>

<actions>
<action name="start"        timeout="20" />
<action name="stop"         timeout="20" />
<action name="monitor"      timeout="20" interval="10" depth="0" />
<action name="meta-data"    timeout="5" />
<action name="validate-all"   timeout="20" />
</actions>
</resource-agent>
END
}

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

### Get Infomation Function

get_instance_id() {
  instance_id=`wget -q -O - http://169.254.169.254/latest/meta-data/instance-id`
}

get_alloc_id() {
  alloc_id=`/usr/bin/aws ec2 describe-addresses --public-ips ${OCF_RESKEY_elastic_ip} \
  --query "Addresses[*].AllocationId" \
  --output text`
}

get_instance_metainfo() {
  mac_addr=`/sbin/ip link show ${OCF_RESKEY_eip_if} | tail -1 | awk '{print $2}'`
  interface_id=`wget -q -O - http://169.254.169.254/latest/meta-data/network/interfaces/macs/${mac_addr}/interface-id`
  private_ips=`wget -q -O - http://169.254.169.254/latest/meta-data/network/interfaces/macs/${mac_addr}/local-ipv4s`
}

###  Execute Function

eip_usage() {
        cat <<END
usage: $0 {start|stop|monitor|validate-all|meta-data}

Expects to have a fully populated OCF RA-compliant environment set.
END
}

eip_start() {
  get_alloc_id
  get_instance_metainfo
  #eip_monitor
  #if [ $? =  $OCF_SUCCESS ]; then
  #      return $OCF_SUCCESS
  #fi
  echo "${OCF_RESKEY_elastic_ip} attaching start..." >> /tmp/test.log
  for private_ip in ${private_ips[@]}
  do
    if [ ! -f /tmp/eip_${private_ip}.lock ];then
      attached_privateip=`/usr/bin/aws ec2 describe-addresses --public-ips ${OCF_RESKEY_elastic_ip} --query 'Addresses[*].PrivateIpAddress' --output text`
      if [ -z ${attached_privateip} ];then
        /usr/bin/aws ec2 associate-address --allocation-id ${alloc_id} --network-interface-id ${interface_id} --private-ip-address ${private_ip}
        echo -n ${OCF_RESKEY_elastic_ip}  > /tmp/eip_${private_ip}.lock
        echo "${OCF_RESKEY_elastic_ip} => ${private_ip} attached success." >> /tmp/test.log
        exit 0
      else
        echo "${OCF_RESKEY_elastic_ip} => ${attached_privateip} already attached." >> /tmp/test.log
      fi
    else
      echo "/tmp/eip_${private_ip}.lock exits." >> /tmp/test.log
    fi
  done
}

eip_stop() {
    eip_monitor
    if [ $? =  $OCF_SUCCESS ]; then
        /usr/bin/aws ec2 disassociate-address --public-ip ${OCF_RESKEY_elastic_ip}
        rm /tmp/eip_*.lock
        rm /tmp/test.log
    fi
    return $OCF_SUCCESS
}

eip_monitor() {
    get_instance_id
    mon=`/usr/bin/aws ec2 describe-addresses --public-ips ${OCF_RESKEY_elastic_ip} --filters "Name=instance-id,Values=${instance_id}" --output json | grep ${instance_id} | wc -l`
    if [ $mon -ne 0  ]; then
        return $OCF_SUCCESS
    fi
    return $OCF_NOT_RUNNING
}

eip_validate() {
    return $OCF_SUCCESS
}


case $__OCF_ACTION in
meta-data)      meta_data
                exit $OCF_SUCCESS
                ;;
start)          eip_start;;
stop)           eip_stop;;
monitor)        eip_monitor;;
validate-all)   eip_validate;;
debug)          eip_debug;;
usage|help)     eip_usage
                exit $OCF_SUCCESS
                ;;
*)              eip_usage
                exit $OCF_ERR_UNIMPLEMENTED
                ;;
esac
rc=$?
ocf_log debug "${OCF_RESOURCE_INSTANCE} $__OCF_ACTION : $rc"
exit $rc