Created
August 17, 2020 23:38
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#!/bin/bash | |
# shellcheck disable=SC2086,SC2034 | |
vpc_id=$1 | |
pritunl_security_group=$2 | |
[[ -z ${vpc_id} ]] && exit 1 | |
[[ -z ${pritunl_security_group} ]] && exit 1 | |
subnets=$(aws ec2 describe-subnets --filters Name=vpc-id,Values=${vpc_id} | jq -r .Subnets[].SubnetId) | |
for subnet in ${subnets}; do | |
# Get ASG | |
asgs=$(aws autoscaling describe-auto-scaling-groups | jq -rc ".AutoScalingGroups[] | select(.VPCZoneIdentifier | contains(\"${subnet}\"))") | |
for asg in ${asgs}; do | |
asg_name=$(echo ${asg} | jq -r .AutoScalingGroupName) | |
# Get launch template | |
lt_id=$(echo ${asg} | jq -r .LaunchTemplate.LaunchTemplateId) | |
lt=$(aws ec2 describe-launch-template-versions --launch-template-id ${lt_id} | jq -s 'sort_by(.LaunchTemplateVersions[].VersionNumber)' | jq .[0].LaunchTemplateVersions[0]) | |
lt_version=$(echo ${lt} | jq -r .VersionNumber) | |
# set ASG to use latest launch template | |
aws autoscaling update-auto-scaling-group --auto-scaling-group-name ${asg_name} \ | |
--launch-template LaunchTemplateId=${lt_id},Version=\$Latest | |
# Remove current .LaunchTemplateData.NetworkInterfaces | |
lt_data_without_ni=$(echo ${lt} | jq '. | del(.LaunchTemplateData.NetworkInterfaces)') | |
# Also remove Tags if they exist | |
lt_data_without_ni_tags=$(echo ${lt_data_without_ni} | jq '. | del(.LaunchTemplateData.TagSpecifications)') | |
# Add pritunl security group | |
network_interfaces=$(echo ${lt} | jq -c -r .LaunchTemplateData.NetworkInterfaces[].Groups | sed "s/]/, \"${pritunl_security_group}\"]/") | |
network_interfaces_str="{\"NetworkInterfaces\": [{\"AssociatePublicIpAddress\": true,\"DeviceIndex\": 0,\"Groups\": ${network_interfaces}}]}" | |
# Build up volume/instance tags for Name | |
tag_str="{\"TagSpecifications\": [{\"ResourceType\": \"instance\",\"Tags\": [{\"Key\": \"Name\",\"Value\": \"pritunl\"}]},{\"ResourceType\": \"volume\",\"Tags\": [{\"Key\": \"Name\",\"Value\": \"pritunl\"}]}]}" | |
# Update .LaunchTemplateData | |
lt_data=$(echo ${lt_data_without_ni} | jq -c ".LaunchTemplateData + ${network_interfaces_str} + ${tag_str}") | |
# Bump version and specify new .LaunchTemplateData | |
aws ec2 create-launch-template-version --launch-template-id ${lt_id} --version-description bump --source-version ${lt_version} --launch-template-data "${lt_data}" | |
# Cause a cycle | |
for instance_id in $(aws autoscaling describe-auto-scaling-instances | jq -r ".AutoScalingInstances[] | select(.AutoScalingGroupName == \"${asg_name}\") | .InstanceId"); do | |
aws ec2 terminate-instances --instance-ids ${instance_id} | |
done | |
done | |
done |
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