Created
January 31, 2018 17:20
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list aws ec2 autoscaling group instances
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| #!/bin/bash | |
| PEER_LIST_FILE=/etc/asg-peer-instances | |
| SELF_IP=$(ifconfig eth0 | grep -o "inet .* netmask" | cut -f2 -d' ') | |
| SELF_INSTANCE_ID=$(curl http://169.254.169.254/latest/meta-data/instance-id) | |
| SELF_PLACEMENT=$(curl http://169.254.169.254/latest/meta-data/placement/availability-zone) | |
| SELF_REGION="${SELF_PLACEMENT%?}" | |
| SELF_ASG=$(aws ec2 describe-tags --filters "Name=resource-id,Values=${SELF_INSTANCE_ID}" --region $SELF_REGION --query 'Tags[?Key==`aws:autoscaling:groupName`].Value' --output text) | |
| ASG_INSTANCE_IDS=$(aws autoscaling describe-auto-scaling-groups --auto-scaling-group-name $SELF_ASG --region $SELF_REGION --query 'AutoScalingGroups[*].Instances[*].InstanceId' --output text | xargs) | |
| AWS_INSTANCE_IPS=$(aws ec2 describe-instances --instance-ids $ASG_INSTANCE_IDS --region $SELF_REGION --query 'Reservations[*].Instances[*].PrivateIpAddress' --filters 'Name=instance-state-name,Values=running' --output text) | |
| PEER_LIST=$(echo $AWS_INSTANCE_IPS | sed "s/${SELF_IP}//g" | xargs) | |
| echo $PEER_LIST > $PEER_LIST_FILE |
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