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#!/bin/sh
#
#
# Manage Elastic IP with Pacemaker
#
#
# Copyright 2016-2018 guessi <guessi@gmail.com>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#
#
# Prerequisites:
#
# - preconfigured AWS CLI running environment (AccessKey, SecretAccessKey, etc.)
# - a reserved secondary private IP address for EC2 instances high availability
# - IAM user role with the following permissions:
# * DescribeInstances
# * AssociateAddress
# * DescribeAddresses
# * DisassociateAddress
#
#######################################################################
# Initialization:
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
#######################################################################
#
# Defaults
#
OCF_RESKEY_awscli_default="/usr/bin/aws"
OCF_RESKEY_profile_default="default"
OCF_RESKEY_api_delay_default="3"
: ${OCF_RESKEY_awscli=${OCF_RESKEY_awscli_default}}
: ${OCF_RESKEY_profile=${OCF_RESKEY_profile_default}}
: ${OCF_RESKEY_api_delay=${OCF_RESKEY_api_delay_default}}
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="awseip">
<version>1.0</version>
<longdesc lang="en">
Resource Agent for Amazon AWS Elastic IP Addresses.
It manages AWS Elastic IP Addresses with awscli.
Credentials needs to be setup by running "aws configure".
See https://aws.amazon.com/cli/ for more information about awscli.
</longdesc>
<shortdesc lang="en">Amazon AWS Elastic IP Address Resource Agent</shortdesc>
<parameters>
<parameter name="awscli" unique="0">
<longdesc lang="en">
command line tools for aws services
</longdesc>
<shortdesc lang="en">aws cli tools</shortdesc>
<content type="string" default="${OCF_RESKEY_awscli_default}" />
</parameter>
<parameter name="profile">
<longdesc lang="en">
Valid AWS CLI profile name (see ~/.aws/config and 'aws configure')
</longdesc>
<shortdesc lang="en">profile name</shortdesc>
<content type="string" default="${OCF_RESKEY_profile_default}" />
</parameter>
<parameter name="elastic_ip" unique="1" required="1">
<longdesc lang="en">
reserved elastic ip for ec2 instance
</longdesc>
<shortdesc lang="en">reserved elastic ip for ec2 instance</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="allocation_id" unique="1" required="1">
<longdesc lang="en">
reserved allocation id for ec2 instance
</longdesc>
<shortdesc lang="en">reserved allocation id for ec2 instance</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="private_ip_address" unique="1" required="0">
<longdesc lang="en">
predefined private ip address for ec2 instance
</longdesc>
<shortdesc lang="en">predefined private ip address for ec2 instance</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="api_delay" unique="0">
<longdesc lang="en">
a short delay between API calls, to avoid sending API too quick
</longdesc>
<shortdesc lang="en">a short delay between API calls</shortdesc>
<content type="integer" default="${OCF_RESKEY_api_delay_default}" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="30s" />
<action name="stop" timeout="30s" />
<action name="monitor" timeout="30s" interval="20s" depth="0" />
<action name="migrate_to" timeout="30s" />
<action name="migrate_from" timeout="30s" />
<action name="meta-data" timeout="5s" />
<action name="validate" timeout="10s" />
<action name="validate-all" timeout="10s" />
</actions>
</resource-agent>
END
}
#######################################################################
awseip_usage() {
cat <<END
usage: $0 {start|stop|monitor|migrate_to|migrate_from|validate|validate-all|meta-data}
Expects to have a fully populated OCF RA-compliant environment set.
END
}
awseip_start() {
awseip_monitor && return $OCF_SUCCESS
if [ -n "${PRIVATE_IP_ADDRESS}" ]; then
NETWORK_INTERFACES_MACS="$(curl -s http://169.254.169.254/latest/meta-data/network/interfaces/macs/)"
for MAC in ${NETWORK_INTERFACES_MACS}; do
curl -s http://169.254.169.254/latest/meta-data/network/interfaces/macs/${MAC}/local-ipv4s |
grep -q "^${PRIVATE_IP_ADDRESS}$"
if [ $? -eq 0 ]; then
NETWORK_ID="$(curl -s http://169.254.169.254/latest/meta-data/network/interfaces/macs/${MAC}/interface-id)"
fi
done
$AWSCLI --profile $OCF_RESKEY_profile ec2 associate-address \
--network-interface-id ${NETWORK_ID} \
--allocation-id ${ALLOCATION_ID} \
--private-ip-address ${PRIVATE_IP_ADDRESS}
RET=$?
else
$AWSCLI --profile $OCF_RESKEY_profile ec2 associate-address \
--instance-id ${INSTANCE_ID} \
--allocation-id ${ALLOCATION_ID}
RET=$?
fi
# delay to avoid sending request too fast
sleep ${OCF_RESKEY_api_delay}
if [ $RET -ne 0 ]; then
return $OCF_NOT_RUNNING
fi
ocf_log info "elastic_ip has been successfully brought up (${ELASTIC_IP})"
return $OCF_SUCCESS
}
awseip_stop() {
awseip_monitor || return $OCF_SUCCESS
ASSOCIATION_ID=$($AWSCLI --profile $OCF_RESKEY_profile --output json ec2 describe-addresses \
--allocation-id ${ALLOCATION_ID} | grep -m 1 "AssociationId" | awk -F'"' '{print$4}')
if [ -z "${ASSOCIATION_ID}" ]; then
ocf_log info "ASSOCIATION_ID not found while stopping AWS Elastic IP"
return $OCF_NOT_RUNNING
fi
$AWSCLI --profile ${OCF_RESKEY_profile} \
ec2 disassociate-address \
--association-id ${ASSOCIATION_ID}
RET=$?
# delay to avoid sending request too fast
sleep ${OCF_RESKEY_api_delay}
if [ $RET -ne 0 ]; then
return $OCF_NOT_RUNNING
fi
ocf_log info "elastic_ip has been successfully brought down (${ELASTIC_IP})"
return $OCF_SUCCESS
}
awseip_monitor() {
$AWSCLI --profile $OCF_RESKEY_profile ec2 describe-instances --instance-id "${INSTANCE_ID}" | grep -q "${ELASTIC_IP}"
RET=$?
if [ $RET -ne 0 ]; then
return $OCF_NOT_RUNNING
fi
return $OCF_SUCCESS
}
awseip_validate() {
check_binary ${AWSCLI}
if [ -z "$OCF_RESKEY_profile" ]; then
ocf_exit_reason "profile parameter not set"
return $OCF_ERR_CONFIGURED
fi
if [ -z "${INSTANCE_ID}" ]; then
ocf_exit_reason "instance_id not found. Is this a EC2 instance?"
return $OCF_ERR_GENERIC
fi
return $OCF_SUCCESS
}
case $__OCF_ACTION in
meta-data)
meta_data
exit $OCF_SUCCESS
;;
esac
AWSCLI="${OCF_RESKEY_awscli}"
ELASTIC_IP="${OCF_RESKEY_elastic_ip}"
ALLOCATION_ID="${OCF_RESKEY_allocation_id}"
PRIVATE_IP_ADDRESS="${OCF_RESKEY_private_ip_address}"
INSTANCE_ID="$(curl -s http://169.254.169.254/latest/meta-data/instance-id)"
case $__OCF_ACTION in
start)
awseip_validate
awseip_start
;;
stop)
awseip_stop
;;
monitor)
awseip_monitor
;;
migrate_to)
ocf_log info "Migrating ${OCF_RESOURCE_INSTANCE} to ${OCF_RESKEY_CRM_meta_migrate_target}."
awseip_stop
;;
migrate_from)
ocf_log info "Migrating ${OCF_RESOURCE_INSTANCE} from ${OCF_RESKEY_CRM_meta_migrate_source}."
awseip_start
;;
reload)
ocf_log info "Reloading ${OCF_RESOURCE_INSTANCE} ..."
;;
validate|validate-all)
awseip_validate
;;
usage|help)
awseip_usage
exit $OCF_SUCCESS
;;
*)
awseip_usage
exit $OCF_ERR_UNIMPLEMENTED
;;
esac
rc=$?
ocf_log debug "${OCF_RESOURCE_INSTANCE} $__OCF_ACTION : $rc"
exit $rc

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Sun, Jul 20, 9:05 PM (20 h, 42 m)
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