Difficulties with regex and overal concept

[EHRETic]

Hi there,

Sorry to ask, but as I'm not coming from dev world, I really have difficulties to optimize the tags, labels & regex together in my Home Lab.

My overall concept:

• 1 docker server VM with "productive" apps (the one I use for myself) - all container instances uses fixed version tags
• 1 docker server VM with test instances where I use most of the time "latest" tag or "latest within a range"

Before I start with triggers and email alerts, I would like to clean the updates detection and I have the following detection difficulties:

• newer detection versions not within the same branch (alpine vs bullseye)
• range detection between X.Y tag and X.Y.Z latest detected
• completely different names (for this one, I might try to add -alpine at the of the regex, but I prefer an expert confirmation)

So for instance, for mariaDB, I could limit the detection to the range by using wud.tag.include=^10.5.\d+$$ but I still ending up with an update detection because of version 10.5.23.

On a more general basis, neither the current doc nor the regex doc permits me to understand the whole syntax of it (like the +$$ at the end)
So if you have "best practices" or more examples, that would be very great! 😉

Another important question: do you recommend to use wud.watch.digest=true all the time to detect any change in a particular version, I'm asking because sometimes images are replaced because of solved security vulnerabilities.

Thanks in advance for your help
Kind regards

[fmartinou]

Hi,

On a more general basis, neither the current doc nor the regex doc permits me to understand the whole syntax of it (like the +$$ at the end)

Regex are just regular Javascript regular expressions that you can test on regex101 if you have some doubts.

The double $$ at the end is just there to escape the dollar sign from being interpolated by Docker-Compose.

So if you have "best practices" or more examples, that would be very great!

Here in the doc, you can already fin pretty much many examples :)
https://fmartinou.github.io/whats-up-docker/#/configuration/?id=complete-example

Do you recommend to use wud.watch.digest=true all the time to detect any change in a particular version

wud.watch.digest=true is only useful for tracking mutable tags (like latest).
Please notice that it involves making many more requests to the Registry so it also has a negative impact on your Docker Hub request quota.