I m getting the following error within my app container when

Question

I m getting the following error within my app container when attempting to do a remote request This is part of a kubernetes cluster that also has apollo hasura postgres ui graphql and scheduler running My most recent steps about 30 minutes ago were the following delete all pods and service in kubernetes `docker system prune a` for a fresh start slightly smiling face created prefect service deployments for k8s using latest images docker build my app image created service deployments for my app for k8s Any ideas THANKS

Zachary Hughes · Answer

Hi < Viv Ian> taking a look now

Zachary Hughes · Answer

It looks like the URL the client is trying to hit might be a bit off you re trying to communicate with Prefect Server correct Quick clarification do you have Apollo Hasura etc running all in one service or are they split into their own kubernetes services

Viv Ian · Answer

Hi < Zachary Hughes> I am trying to communicate with prefect server The last two lines of my Dockerfile are `RUN prefect backend server` and `CMD python flow example py` Apollo Hasura etc are running in their own kubernetes services

Zachary Hughes · Answer

Okay gotcha My immediate thought is that if you ve decomposed each part of the stack into its own service you may need to adjust some of your hosts Are you able to ping `<http graphql 4200 graphql health>` from the pod you re trying to register your flow with I ask that as an arbitrary connectivity test because I m wondering if the `localhost` references aren t playing nicely now that things are in different pods

Viv Ian · Answer

I tested it out by creating a new pod with a container that has the command to `ping ` and the response was `ping bad address `

Zachary Hughes · Answer

Okay odd What about `<http 1 2 3 4 4200 graphql health>` where 1 2 3 4 is the IP address of your graphql service

Zachary Hughes · Answer

FWIW it sounds like you re very nearly there just need to sort out this Kubernetes networking issue

Viv Ian · Answer

I m getting the same error when using the service IP I also noticed that the port being used for graphql is 4201 so attempted the above steps using port 4201 but still got the same error disappointed

Zachary Hughes · Answer

Would you be comfortable posting the YAML for your Apollo and GraphQL service deployments DMing is also fine if that would be better for you

Viv Ian · Answer

Sure thing I actually just got them from Josh slightly smiling face <https github com joshmeek prefect server ui k8s>

Zachary Hughes · Answer

Awesome thank you Will take a look

Zachary Hughes · Answer

Okay that was actually super helpful in ruling some things out That YAML all looks pretty solid so I m betting this is an issue with the app configuration When building your app could you try specifying `export PREFECT SERVER HOST=apollo` in the same block of instructions where you run `prefect backend server` It also sounds like building deploying might be something of a laborious process If you want to verify that the server API is working as is before rebuilding your app you could also `kubectl port forward lt YOUR APOLLO HERE gt 4200 4200` If the server is working as expected you should be able to register a flow while port forwarded to your current setup