[Feature] Namespace offloading in batches

[air-31]

Describe the problem you are having (if any)

We are working in an environment with a considerably high number of namespaces (on the order of thousands). We would like to offload a larger part of them, however it is somewhat impractical to do so with the currently available offloading procedure.

Describe the solution you would like

It would be nice to upgrade the liqoctl offload command to include an option to offload namespaces in batches via the usage of label selectors (e.g. liqoctl offload namespaces --label 'k8s.io/type=tenant'). Subsequently, the liqoctl unoffload command is to be upgraded accordingly as well.

Describe the user value of this feature

This would provide users with a direct way to offload a number of namespaces at once.

Describe your proposed solution

No response

Do you volunteer to implement this feature?

• I want to implement this feature

Code of Conduct

• I agree to follow this project's Code of Conduct

[claudiolor]

Hi @air-31,
Thanks for opening this issue!
I agree this would be a nice addition to the liqoctl CLI, it should be fairly straightforward to implement and could be a great candidate for a first contribution

That said, I think you can still offload/unoffload namespaces in batch by first selecting the namespaces and then piping their names into the liqoctl offload/unoffload command.
For example, you can use the following command to offload a batch of namespaces based on the label:

k get ns -l k8s.io/type=tenant -o custom-columns=":metadata.name" --no-headers | xargs -n 1 liqoctl offload namespace

Similarly to unoffload the namespaces:

k get ns -l k8s.io/type=tenant -o custom-columns=":metadata.name" --no-headers | xargs -n 1 liqoctl unoffload namespace --skip-confirm

[mayooot]

I can do this.

[claudiolor]

Hi @mayooot!
thank you for volunteering! I will be more than happy to review your PR once ready :)
If you need any help or you have any questions feel free ask! You can join our slack workspace to directly reach us.

[mayooot]

I am new to the liqo project and know very little about it.
I have added an offload subcommand: namespaces which can be used: liqoctl offload namespaces --label-selector='app=namespaces'.

@claudiolor Cloud you give me some suggest about this #3060.
If possible, I will finish the remaining development work abount unoffload.

[claudiolor]

Hey @mayooot, thank you!
I posted a comment in the PR.