GraphQL Mesh Gateway Health Check Endpoint

When running the GraphQL Mesh server in a cloud environment in a container, perhaps using a platform like Kubernetes or Elastic Container Service on AWS, we need to specify an HTTP endpoint to act as a health check for the container.

Though it is not well-documented, the Mesh server does have a healthcheck endpoint available.

The route is simply: /healthcheck

Here is an example calling the healthcheck of a locally running Mesh server:

$ curl "http://localhost:4000/healthcheck" -v
* Connected to localhost ( port 4000 (#0)
> GET /healthcheck HTTP/1.1
> Host: localhost:4000
> User-Agent: curl/7.77.0
> Accept: */*
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< Date: Mon, 19 Dec 2022 03:06:17 GMT
< Connection: keep-alive
< Keep-Alive: timeout=5
< Content-Length: 0

Note that just the root response (“/”) returns an HTTP 302 Found and so /healthcheck is ideal for a 200 OK health status response.

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