aws_keepalive_eip.sh

aws_keepalived_eip.sh

#!/bin/bash

# parameter
INSTANCE_ID=$1

# variables
export AWS_ACCESS_KEY_ID=XXXXXXXXXXX
export AWS_SECRET_ACCESS_KEY=XXXXXXXXXXX
EIP1=eipalloc-XXXXXXXXXXX 	# EIP1 xx.xx.xx.xx
EIP2=eipalloc-XXXXXXXXXXX 	# EIP2 xx.xx.xx.xx
N1ETHID=eni-XXXXXXXXXXX	        # xx.xx.xx.xx / ec2-instance-1 eth1
N2ETHID=eni-XXXXXXXXXXX 	# xx.xx.xx.xx / ec2-instance-2 eth1
N1IP1=xx.xx.xx.xx		# ec2-instance-1
N1IP2=xx.xx.xx.xx		# ec2-instance-1
N2IP1=xx.xx.xx.xx 		# ec2-instance-2
N2IP2=xx.xx.xx.xx 		# ec2-instance-2
HOSTNAME=`hostname -s`

# if INSTANCE_ID=1 instance is master then set $N1ETHID and N1IP on ec2-instance-1; 
# if INSTANCE_ID=2 instance is master then set $N2ETHID nad N2IP on ec2-instance-2;
if [[ ${HOSTNAME} == "ec2-instance-1" ]]; then
    if [[ ${INSTANCE_ID} == "1" ]]; then
      IF=${N1ETHID}
      IP=${N1IP1}
      EIP=${EIP1}
    elif [[ ${INSTANCE_ID} == "2" ]]; then
      IF=${N1ETHID}
      IP=${N1IP2}
      EIP=${EIP2}
    fi
    # AWS CLI to Assign EIP to Master (self) host
    aws ec2 associate-address --region $region --allocation-id ${EIP} --private-ip-address ${IP} --network-interface-id ${IF} --allow-reassociation
fi

# if INSTANCE_ID=1 instance is master then set $N1ETHID and N1IP on ec2-instance-1; 
# if INSTANCE_ID=2 instance is master then set $N2ETHID nad N2IP on ec2-instance-2;
if [[ ${HOSTNAME} == "ec2-instance-2" ]]; then
    if [[ ${INSTANCE_ID} == "1" ]]; then
      IF=${N2ETHID}
      IP=${N2IP2}
      EIP=${EIP1}		
    elif [[ ${INSTANCE_ID} == "2" ]]; then
      IF=${N2ETHID}
      IP=${N2IP1}
      EIP=${EIP2}
    fi
    # AWS CLI to Assign EIP to Master (self) host
    aws ec2 associate-address --region $region --allocation-id ${EIP} --private-ip-address ${IP} --network-interface-id ${IF} --allow-reassociation
fi