I’m trying to make a docker image that’ll allow me to run my flows within it. I attempted to use

prefecthq/prefect:latest

as the base image, but encountered pyscopg2 installation issues, so I decided to just pip install prefect within the image. The example below is super basic (just want to be able to run a

prefect

command). However, when I run the image, I get the following error:

/bin/sh: 1: prefect: not found

I’ve also attempted the following variations in place of the

CMD prefect version

command: •

RUN ["/bin/bash", "-c", "prefect version"]

•

CMD ["prefect", "version"]

Any ideas? 😄

Hi @Viv Ian - I’ll try to recreate; in the meantime could you share the

psycopg2

error you ran into? We use our base images all over the place so I’d be surprised if there was something corrupt in them, but if so we’d want to know ASAP

Hi Chris, I’m running on a Mac. Apologies for the omission. The

psycopg2

error is raised when attempting to pip install the

django-heroku

package within

requirements.txt

. The error is below:

Hi @Viv Ian this error is unrelated to Prefect; if you look closely at the traceback, it suggests you try to install

psycopg2-binary

instead of

psycopg2

, otherwise you’ll need to install

pg_config

into this image

Hi @Chris White totes understand this isn’t a prefect error. This was the error I was getting when attempting to use prefect as the base image, so I wanted to go about using a different base image and creating my own Dockerfile. Wasn’t sure if this was something anyone else had run into. 😅

ah gotcha gotcha

Figured out the issue and posting here in case anyone encounters in the future…just gotta add this line in the Dockerfile before installing whatever needs psycopg2:

RUN apt-get update && apt-get install -y postgresql libpq-dev postgresql-client postgresql-client-common

Awesome - I’ll archive this thread to GitHub so anyone else with this issue can find it!