Is there any HTTP/TCP endpoint for a gremlin-server health check? Currently, we are using the default TCP port but it doesn't seem to indicate the gremlin-server's health.
We noticed that gremlin-server crashed and was not running but the health check kept passing. We are using AWS Classic Load Balancer.
Have you enabled an HTTP endpoint for the Gremlin service? The document above explains:
While the default behavior for Gremlin Server is to provide a WebSocket-based connection, it can also be configured to support plain HTTP web service. The HTTP endpoint provides for a communication protocol familiar to most developers, with a wide support of programming languages, tools and libraries for accessing it.
If so, you can use an ELB HTTP health check to a target like this:
HTTP:8182/?gremlin=100-1
With a properly configured service, this query will return a 200 HTTP status code, which will indicate to the ELB that the service is healthy.
