Support for custom sidecars

[Philmod]

Summary

In order to use Cloud SQL for Mattermost, in a secure way, they recommend adding a proxy as a sidecar.
https://cloud.google.com/sql/docs/mysql/connect-kubernetes-engine#running_the_proxy_as_a_sidecar

Unfortunately, it's not possible today as the Operator rewrites the whole deployment as soon as it's modified.

[balan2010]

Hi! I would like to work on this

[Szymongib]

Hi @balan2010, sure feel free to take it!
If you need any support let us know here or on Mattermost community server.

[balan2010]

Thanks @Szymongib sure will get in touch in community channel if I need any support :-)

[balan2010]

@Szymongib would you be able to assign this to me. I don't have permission to do so

[vineelyalamarthy]

@jwilander @Philmod @balan2010 is there help needed on MatterMost operator.

[Philmod]

@balan2010 Any update on this? Thanks for picking it up!

[vineelyalamarthy]

Is any one already working on this? I would like to contribute. @Philmod @balan2010

[balan2010]

@vineelyalamarthy I won't be able to work on this for atleast couple of months. So feel free to work on it

[vineelyalamarthy]

/assign

[jasonblais]

@vineelyalamarthy I have assigned the issue to you

[vineelyalamarthy]

@jasonblais is there a grooming or vetting process that happens before a posted issue becomes a story .
Also do we want to support Cloud SQL for Mattermost as asked by @Philmod.

[jasonblais]

Yes, we have a process to review tickets before turning them to help wanted: https://handbook.mattermost.com/contributors/contributors/ways-to-contribute/help-wanted

@Szymongib I would defer to you regarding the Cloud SQL question?

[Szymongib]

I think we would like to have a more generic mechanism that allows adding sidecars to pods running Mattermost and Cloud SQL would be just one option.

[Philmod]

Any update here?

[Philmod]

Hi! Any status here?

[gabrieljackson]

Hey @Philmod, I was just shown this request and think we can add support for custom sidecars fairly easily. I will give you an update in the next few days.

[gabrieljackson]

@Philmod the functionality to add custom sidecars to the Mattermost deployment was merged. Note that this is the original implementation of sidecars and not the new feature-gated one which is in alpha, although we may migrate to that in the future once it stabilizes more.

This will be included in our next operator release which will be made available after we complete testing.

[Philmod]

Thanks @gabrieljackson! Is there any documentation on how to configure such a sidecar, maybe from an installation.mattermost.com kubernetes config?

Right now the doc explains how to set up the SQL connection secret for mattermost to connect, but would you know how we could adapt that if we wanted to use the Cloud SQL Auth Proxy?