docs(MADR): mesh logging madr initial proposal

[slonka]

Rendered version for better viewing: https://github.com/slonka/kuma/blob/docs/mesh-logging/docs/madr/decisions/008-mesh-logging.md#meshlogging

closes #4733

Signed-off-by: slonka slonka@users.noreply.github.com

Checklist prior to review

• Link to docs PR or issue -- pr is itself docs
• Link to UI issue or PR -- not ui issue
• Is the issue worked on linked? -- yes
• The PR does not hardcode values that might break projects that depend on kuma (e.g. "kumahq" as a image registry) --
• The PR will work for both Linux and Windows, system specific functions like syscall.Mkfifo have equivalent implementation on the other OS --
• Unit Tests -- docs
• E2E Tests --
• Manual Universal Tests --
• Manual Kubernetes Tests --
• Do you need to update UPGRADE.md? --
• Does it need to be backported according to the backporting policy? --
• Do you need to explicitly set a > Changelog: entry here? -- added entry to roll up this with implementation, let me know if it's wrong

Changelog: feat(policy): Add MeshAccessLog policy

[lobkovilya]

Great start! It would be good to see examples when the mesh operator defines logging for the whole mesh and the service owner somehow changes this behavior

[codecov-commenter]

Codecov Report

Merging #4908 (93be1f2) into master (e6abbbe) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4908      +/-   ##
==========================================
- Coverage   46.68%   46.67%   -0.01%     
==========================================
  Files         687      687              
  Lines       46656    46656              
==========================================
- Hits        21781    21777       -4     
- Misses      22966    22969       +3     
- Partials     1909     1910       +1     

Impacted Files	Coverage Δ
pkg/core/resources/manager/cache.go	83.11% <0.00%> (-5.20%)	⬇️
pkg/xds/cache/once/cache.go	82.05% <0.00%> (-5.13%)	⬇️
pkg/xds/cache/once/once.go	95.00% <0.00%> (-5.00%)	⬇️
pkg/gc/finalizer.go	78.26% <0.00%> (+4.34%)	⬆️

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[lahabana]

This looks very good to me!

I guess we should really focus on supporting inline backend and then add the reference type and the global type just to make sure we ship something right?

[slonka]

I guess we should really focus on supporting inline backend and then add the reference type and the global type just to make sure we ship something right?

Yes! Let's do this in that order!

[lahabana]

@slonka just a process detail MADR are meant to be approved by 3 people :)

[slonka]

@lahabana I forgot about that :/ - should I revert?

[lahabana]

No it's fine I think we had a bunch of verbal approvals (probably might be useful to get the approval after the merge now :))

[lukidzi]

LGTM