One GET endpoint for monitoring

[Tbaut]

Talking with @fevo1971 it would be great to build a super simple app (thinking about a nodejs express) that accept a GET call (e.g on /health) and this checks everything we have in our stack:

• auth-server (either /health or/and an advanced query such as users)
• chain-db-watcher (/health)
• hasura (/healtz or/and an advanced query including remote joins such as a post, with author name and a referendum with status)
• chain-db server (a graphql request for treasury proposal with status), or we should check if prisma has health-check
• blockchain node (an RPC/api call with latest block number)
• nodewatcher job, get the blockIndex in chain-db, then wait 10s and get it again, it should increment.

[Tbaut]

This could be useful: https://github.com/Tbaut/chain-db-script

We basically just need to add the express part, the rest is a super simple graphql boilerplate, with TS and eslint already configured.

[Tbaut]

ah, just saw your PR, my comment was a little late then :/

[niklabh]

On Last point how can i wait 10 sec. I need to provide all service status in a single get call

[Tbaut]

On Last point how can i wait 10 sec. I need to provide all service status in a single get call

With a promise and a settimeout. wouldn't that work?

[niklabh]

But why wait 10 seconds for it. It will slow down healthcheck endpoint. Can't i query blockIndex. And keep a variable in memory changed since last time which gives the number of seconds since last change and do healthcheck value based on that variable

[Tbaut]

Sure that would work as well, if the healthcheck is frequent enough.