Theo's Typesafe Cult•2y ago

Docker Health Check

Anything look wrong here to you guys?

32 Replies

Perfect•2y ago

the health check seems to be acting very weird

Grey•2y ago

weird how?

Perfect•2y ago

its not working @0xahmad probably should have clarified that haha it makes the db just exit

Grey•2y ago

I don't do health checks in docker-compose but did you try the test with

healthcheck:
      test: ["CMD-SHELL", "pg_isready", "-d", "db_prod"]
      // or
      test: ["CMD-SHELL", "sh -c 'pg_isready -U postgres -d dbname'"]

healthcheck:
      test: ["CMD-SHELL", "pg_isready", "-d", "db_prod"]
      // or
      test: ["CMD-SHELL", "sh -c 'pg_isready -U postgres -d dbname'"]

Perfect•2y ago

I did, but it turns out this is exactly the same as what I have now, CMD SHELL is implied I solved it, turns out it actually was unhealthy and I was getting some postgres errors I was not able to see at first in the vastness of logs I was getting

Grey•2y ago

Cool, I was gonna say connect a volume with the logs dir, and check them

Perfect•2y ago

yah, found them in docker desktop actually wish there was a way to just see logs for a certain service probably is i just dont know it my docker compose terminal just spits out every service together its so much

Grey•2y ago

i think you can stream logs of each container, I just never tried it out

Perfect•2y ago

yeah might have to look into that later or just use docker desktop thx for ur help tho, much appreciated! @0xahmad oh and also

Grey•2y ago

Perfect•2y ago

you said you dont do health checks in docker compose, how do u do them? (if at all)

Grey•2y ago

I moved to k8 so I do my health chesk in it now it's connected to a monitoring system which keeps track of what svc is healthy and not

Perfect•2y ago

ahhh ok havent learned kubernetes yet

Grey•2y ago

I only use docker-compose for local dev deployment is always either k8 or cloud

Perfect•2y ago

oh so we can switch over relatively easy?

Grey•2y ago

if you don't need it then stick to what you know 👋

Perfect•2y ago

dont need it but yeah probably cool to try it out haha

Grey•2y ago

not really it's a learning curve but if you know you'll need it then it's good to learn it

Perfect•2y ago

school project gives us extra credit for it so might try it out

Grey•2y ago

I'm working on larger projects so I need to know devops inside out

Perfect•2y ago

yeah I bet

Grey•2y ago

that's nice you should learn it

Perfect•2y ago

docker compose is only for a single machine right? so not meant for scaling

Grey•2y ago

it's not hard, just a hek ton of yaml to write

Perfect•2y ago

just meant for setting up containers easier?

Grey•2y ago

scratch that, checkout pulumi, you can code your configurations

Perfect•2y ago

i figured a lot of setup/config yeah

Grey•2y ago

no I think it's scalable docker-swarm from what I remember

Perfect•2y ago

oh right swarm so many options

Grey•2y ago

docker is everywhere, it's just more abstractions over that k8 is just an abstraction over docker(or any other containerizer)

Perfect•2y ago

more abstractions yay abstractions never end lmao

Grey•2y ago

yea sad story haha you have to weigh the abstraction cost over the requirements. I'd say it's healthy as long as you're careful

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