``` ~ gt docker run it prefecthq lt server core 0 14 18 gt p Prefect Community #ask-community

```[~] -> docker run -it prefecthq/<server:c...

Sven Teresniak

05/12/2021, 11:52 AM

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[~] -> docker run -it prefecthq/<server:core-0.14.18> pip show prefect
Name: prefect
Version: 0.14.16+95.g377f2fe7a

holy crap! what is the purpose of the version number in the tag if not the prefect version?

Kevin Kho

05/12/2021, 2:08 PM

Hi @Sven Teresniak ! Sorry about that! Will inform the team about this.

Kevin Kho

05/12/2021, 2:29 PM

Hey, I looked into this and

<server:core-0.14.18>

is the last server release tagged with

core-0.14.18

so when you run

prefect server start

, we know which image is compatible with the latest core. This is not a prefect core image.

Sven Teresniak

05/12/2021, 3:07 PM

Okay, but which official docker image I have to chose to be compatible with (flow) code based on PyPI's

prefect==0.14.18

? Until now I have a Prefect installation based on

server:core-$PREFECTVERSION

for towel, an

apollo:core-$PREFECTVERSION

for apollo, the same tag for

ui

. For dask-master, dask-worker and agent I have my own images based on

pip install prefect==$PREFECTVERSION

. Of course the

$PREFECTVERSION

is the same for all above.

Sven Teresniak

05/12/2021, 3:09 PM

but

pip install prefect==0.14.18

requires

click>=7

which in turn installs

click==8.0.0

. However, the

sever

image contains code where also

prefect

(the python package) is installed but in a lower version and with

click v7.1.2

Sven Teresniak

05/12/2021, 3:09 PM

I don't get it. Why is Prefect 0.14.16 part of the

<server:core-0.14.18>

image?

Sven Teresniak

05/12/2021, 3:09 PM

I'm running Prefect in K8S with a static DaskExecutors

Zanie

05/12/2021, 3:18 PM

Hey @Sven Teresniak -- the server image with

core-0.14.18

should be compatible with flow code on 0.14.18 even though the version of core on the server image is 0.14.16

Zanie

05/12/2021, 3:19 PM

The Server's Prefect installation is not used to execute your flows

Zanie

05/12/2021, 3:20 PM

When a new version of Prefect Core is released, the last released version of Server (which is using Prefect 0.14.16) is tagged as compatible with 0.14.18 so when someone runs

prefect server start

in 0.14.18 they get a consistent Server setup.

Zanie

05/12/2021, 3:23 PM

Sorry this is confusing, it's a bit tricky to manage docker containers across multiple repositories and making this a bit more intuitive is on my roadmap.

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