Hi Team How do i identify the images corresponding to Prefec

Question

Hi Team How do i identify the images corresponding to Prefect V2 under Dockerhub <https hub docker com r prefecthq server|prefecthq server> The tags doesnt seem to be helpful in identifying it Is there any documentation around using Dockerhub imags correctly

Ryan Peden · Answer

Hi Rahul the Prefect 2 images are all in <https hub docker com r prefecthq prefect|prefecthq prefect> on Docker Hub

Oscar Björhn · Answer

And there are no separate server images it s all just prefect slightly smiling face

Rahul Kadam · Answer

ohh i was suspecting that thats great actually Thanks I guess i should go through but is there any additional documentation you can suggest In V1 we had images like prefecthq ui prefecthq apollo prefecthq server but now everything is under is that correct

Ryan Peden · Answer

That is correct The same image can run the Prefect Orion server which includes the UI and API or a Prefect agent You can even use the image to run CLI commands if you want to experiment with it before installing Prefect 2 locally In case it s helpful I put together a GitHub repo that shows how to do all of that using Docker Compose <https github com rpeden prefect docker compose>

Rahul Kadam · Answer

Awesome this will be helpful Thank you

Rahul Kadam · Answer

< Ryan Peden> Is Minio a mandatory requirement or you are just using it for some specific feature

Ryan Peden · Answer

I m just using it to demonstrate remote storage It s not required

Rahul Kadam · Answer

< Ryan Peden> I tried with docker image tags 2 6 6 python3 9 conda and 2 6 5 python3 10 in both of them i am getting this error while running in ECS ```ModuleNotFoundError No module named psycopg2 ``` the dependency packages should be already there in docker images isnt it

Ryan Peden · Answer

Prefect uses `asyncpg` instead of `psycopg2` so `psycopg2` isn t included in the image If you re using Postgres instead of SQLite for Orion make sure your connection string starts with `postgres asyncpg` and not `postgres psycopg2`

Rahul Kadam · Answer

ohh let me check this and yes im using postgres i also see postgres asyncpg way of connection string in the model repo you provided earlier Thanks

Rahul Kadam · Answer

< Ryan Peden> if we use postgres what is the least supported version looks like postgres 11 is not compitable in your demo repo you are using 14

Ryan Peden · Answer

Postgres 13 is the minimum requirement

Rahul Kadam · Answer

yeah that makes sense i made progress from last error but because i was on PG 11 i am facing other errors tomorrow i will try with PG 14 working in IST timezone Thanks for your help

Rahul Kadam · Answer

Hi < Ryan Peden> just making sure all my issues are here in one thread stuck out tongue So I am setting up server and agents in AWS ECS when i run the ECS agent with below command its ```prefect agent start q $ QUEUE NAME run task kwargs root prefect kwargs json task definition root prefect task definition $ AWS ENV yaml cluster $ ECS CLUSTER NAME task role arn $ FLOW TASK ROLE execution role arn $ FLOW EXECUTION ROLE task definition add uuid true``` It is failing with below error ```TypeError loader must define exec module ``` even in local env The variables and files mentioned in command are there this is how we were running it in previous version minus the ` q queue name` Any idea why it could be happening

Ryan Peden · Answer

Hi Rahul Prefect 2 agents are infrastructure agnostic so `prefect agent start` doesn t know what to do with the ECS specific flags Instead you would need to set values in an which you can then use when creating

Rahul Kadam · Answer

ohh got it let me take look at docs and modify the agent to run the binary directly without these parameters

Rahul Kadam · Answer

this makes sense because in previous version we used to run prefect agent ecs start