Swarm update notifications

[mixman68]

Hello,

I try this script, it was good but for swarm containers, it check the image tag with the associated hash so no update is available despite the retag is registry

[mag37]

I have never used swarm and dont know how it differs from regular docker when it comes to image updates.

What do you mean with the tag?
It will always use the specific tag used in your configuration.
That means if you use some_image:2.0 in your config, it will not upgrade to some_image:2.1 when that's available.

Though if you'd use a tag lets say some_image:2 it will upgrade from 2.1 to 2.2 etc, but will not upgrade to 3.0.

Is this what you mean?

[mixman68]

Hello, thanks for reply

In swarm the image digest is fixed.

Example with pgAdmin dpage/pgadmin4:latest@sha256:ab92b145c617f3c48ff54ed2cd765210a12e7b4f0d0da7897d944b2a90203910

So the script will check if the sha256 digest still here despite the latest was updated, so I will not receive update notification for this container

I think you just need to strip after @ and remove the @ to solve this

For update in swarm : docker service update "name of container without task_id" --image dpage/pgadmin4:latest

[mag37]

Ah okay, thank you for the details!

Well - this project is based on docker compose all the commands of restarting containers after updates are with docker compose ....

So to support docker swarm I'd have to rewrite some things. And to do that I'd need to understand docker swarm 😄 so I'd need to test that out.

While I'd love to do this - I don't have the time right now. I'll add it to my list of things to check out in the future, I'm sorry.

[mixman68]

I have made this here : https://github.com/mixman68/dockcheck/tree/feature/swarm-update

But the code is not very beautiful

[mag37]

Thank you for contributing ideas!
I'll try to look into it soon - have two other features on the way in atm :)