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fix(packer/linux): power off bootstrap failure when IMDS has no instance id or IMDS is unreachable #202

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fix(packer/linux): power off bootstrap failure when IMDS has no instance id or IMDS is unreachable #202

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16 changes: 11 additions & 5 deletions packer/linux/ansible/roles/agent/files/start-agent.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -3,17 +3,23 @@
set -eo pipefail

#
# If anything goes wrong with the instance startup,
# we make the instance unhealthy, so the auto scaling group can rotate it.
# If anything goes wrong with the instance startup, mark unhealthy when IMDS returns an
# instance id; otherwise shut down (AWS calls need IMDS; LT uses terminate on shutdown).
#
on_failure() {
local exit_code=$1
if [[ $exit_code != 0 ]] ; then
set +e
local __token__=$(fetch_idms_token)
local __instance_id__=$(curl -H "X-aws-ec2-metadata-token: $__token__" --fail --silent --show-error --location "http://169.254.169.254/latest/meta-data/instance-id")
aws autoscaling set-instance-health \
--instance-id "${__instance_id__}" \
--health-status Unhealthy
if [[ -n "$__instance_id__" ]]; then
aws autoscaling set-instance-health \
--instance-id "${__instance_id__}" \
--health-status Unhealthy
else
sudo shutdown -h now || sudo poweroff -f || true
fi
set -e
fi
}

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