How to manually get Buildkite Elastic CI Stack instances to terminate if they're stuck in Terminating:Wait state

aws-ec2-cli-example.bash

# Find the ASG name
aws autoscaling describe-auto-scaling-groups \
  --query 'AutoScalingGroups[].AutoScalingGroupName'

# Find the lifecycle hook name
aws autoscaling describe-lifecycle-hooks \
  --auto-scaling-group-name="$ASG_NAME" \
  --query 'LifecycleHooks[].LifecycleHookName'

# Find the terminating:wait instance ids
aws autoscaling describe-auto-scaling-groups \
  --auto-scaling-group-names "$ASG_NAME" \
  --query 'AutoScalingGroups[0].Instances[].{id:InstanceId,state:LifecycleState}'

# Set these based on the above output
ASG_NAME="xxx"
LIFECYCLE_HOOK_NAME="yyy"
INSTANCE_IDS="i-1 i-2 i-3"

# Force the termination to continue
for id in INSTANCE_IDS; do
  aws autoscaling complete-lifecycle-action \
    --lifecycle-hook-name "$LIFECYCLE_HOOK_NAME" \
    --auto-scaling-group-name "$ASG_NAME" \
    --instance-id "$id" \
    --lifecycle-action-result "CONTINUE"
done