Symptom

The /status endpoint returns a 503 error instead of FIRST_RUN on initial install. This means that any load balancer which relies on /status to report will not see the node as running. In AWS Cloudformation, this means that any new stack on versions 7.6.6, 7.6.7, 7.10.x, 7.11.0, and 7.11.1 will not work - the nodes are up and running but they are never added into the load balancer pool.

Workaround

1. Access the node directly (in AWS you will need to add your IP to the security group on the port that Jira is running on)
2. Run through the setup wizard
3. Once setup is complete, the /status endpoint will return RUNNING and the nodes will be added to the load balancer