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vtgate: support filtering tablets by tablet-tags #15911

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timvaillancourt
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@timvaillancourt timvaillancourt commented May 9, 2024

Description

This PR implements the RFC: #15908 by:

  1. Adding the vtgate flag: --tablet-filter-tags StringMap for a list of tablet-tag KVs to match
  2. Considering this optional filter in the healthcheck code

This support works in addition (a secondary filter) to the mutually-exclusive --tablet_filter / --keyspaces_to_watch features

If/when there is agreement on the approach I will add documentation for the new support and flag

Related Issue(s)

Resolves #15908

Checklist

  • "Backport to:" labels have been added if this change should be back-ported to release branches
  • If this change is to be back-ported to previous releases, a justification is included in the PR description
  • Tests were added or are not required
  • Did the new or modified tests pass consistently locally and on CI?
  • Documentation was added or is not required

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Signed-off-by: Tim Vaillancourt <[email protected]>
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vitess-bot bot commented May 9, 2024

Review Checklist

Hello reviewers! 👋 Please follow this checklist when reviewing this Pull Request.

General

  • Ensure that the Pull Request has a descriptive title.
  • Ensure there is a link to an issue (except for internal cleanup and flaky test fixes), new features should have an RFC that documents use cases and test cases.

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  • Apply the release notes (needs details) label if users need to know about this change.
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  • Protobuf changes should be wire-compatible.
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@vitess-bot vitess-bot bot added NeedsBackportReason If backport labels have been applied to a PR, a justification is required NeedsDescriptionUpdate The description is not clear or comprehensive enough, and needs work NeedsIssue A linked issue is missing for this Pull Request NeedsWebsiteDocsUpdate What it says labels May 9, 2024
@timvaillancourt timvaillancourt linked an issue May 9, 2024 that may be closed by this pull request
@github-actions github-actions bot added this to the v20.0.0 milestone May 9, 2024
@timvaillancourt timvaillancourt changed the title Vttablet tablet filter tags vtgate: support filtering tablets by tablet-tags May 9, 2024
@timvaillancourt timvaillancourt marked this pull request as ready for review May 9, 2024 23:36
Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Tim Vaillancourt <[email protected]>
@timvaillancourt timvaillancourt added Component: Query Serving and removed NeedsDescriptionUpdate The description is not clear or comprehensive enough, and needs work NeedsIssue A linked issue is missing for this Pull Request NeedsBackportReason If backport labels have been applied to a PR, a justification is required labels May 10, 2024
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codecov bot commented May 10, 2024

Codecov Report

Attention: Patch coverage is 83.33333% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 68.22%. Comparing base (f118ba2) to head (7e38cf1).
Report is 136 commits behind head on main.

Files Patch % Lines
go/vt/discovery/healthcheck.go 42.85% 4 Missing ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##             main   #15911      +/-   ##
==========================================
- Coverage   68.40%   68.22%   -0.19%     
==========================================
  Files        1556     1541      -15     
  Lines      195121   197254    +2133     
==========================================
+ Hits       133479   134570    +1091     
- Misses      61642    62684    +1042     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

@timvaillancourt timvaillancourt added the Type: Enhancement Logical improvement (somewhere between a bug and feature) label May 10, 2024
Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Tim Vaillancourt <[email protected]>
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@deepthi deepthi left a comment

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In general I tend to be thrifty about adding new flags, but this seems like a logical extension of the tags feature of the tablet (which already exists for whatever reason), so I'm not objecting to this.
The implementation and unit tests look fine. I'll leave it to you to investigate and fix the unit tests.

@deepthi deepthi requested a review from a team May 31, 2024 19:55
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Left a comment on something i am not sure about. Otherwise, besides the failing tests LGTM.

We should probably do a single website PR that gathers the new flags introduced by this PR and #15919.

}
topoWatchers = append(topoWatchers, NewTopologyWatcher(ctx, topoServer, hc, filter, c, refreshInterval, refreshKnownTablets, topo.DefaultConcurrency))
topoWatchers = append(topoWatchers, NewTopologyWatcher(ctx, topoServer, hc, filters, c, refreshInterval, refreshKnownTablets, topo.DefaultConcurrency))
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Shouldn't we reset the filters slice here? Otherwise we keep appending the same filters over and over again for each cells.

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@frouioui good catch! yes, this should be a reset each iteration of the loop, updated 👍

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@frouioui re-requested review on the fix 🙇

Signed-off-by: Tim Vaillancourt <[email protected]>
@timvaillancourt timvaillancourt requested a review from frouioui May 31, 2024 23:29
Signed-off-by: Tim Vaillancourt <[email protected]>
go/vt/discovery/topology_watcher.go Outdated Show resolved Hide resolved
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Reminder for a website PR.

Co-authored-by: Shlomi Noach <[email protected]>
Signed-off-by: Tim Vaillancourt <[email protected]>
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Will merge this PR without website changes, so as to get this into v20 before code freeze. Ideally the website PR will follow before RC1 next week.

@shlomi-noach shlomi-noach removed the NeedsWebsiteDocsUpdate What it says label Jun 3, 2024
@shlomi-noach shlomi-noach merged commit f4591fb into vitessio:main Jun 3, 2024
93 of 94 checks passed
@timvaillancourt timvaillancourt deleted the vttablet-tablet-filter-tags branch June 3, 2024 21:19
timvaillancourt added a commit to timvaillancourt/vitess that referenced this pull request Jun 4, 2024
timvaillancourt added a commit to slackhq/vitess that referenced this pull request Jun 4, 2024
shlomi-noach pushed a commit that referenced this pull request Jun 4, 2024
timvaillancourt added a commit to slackhq/vitess that referenced this pull request Jun 4, 2024
* `vtgate`: support filtering tablets by tablet-tags  (vitessio#15911)

Signed-off-by: Tim Vaillancourt <[email protected]>
Co-authored-by: Shlomi Noach <[email protected]>

* Add support for sampling rate in `streamlog` (vitessio#15919)

Signed-off-by: Tim Vaillancourt <[email protected]>

* Fix merge conflict resolution

Signed-off-by: Tim Vaillancourt <[email protected]>

* update rand import

Signed-off-by: Tim Vaillancourt <[email protected]>

* Add sql text counts stats to `vtcombo`,`vtgate`+`vttablet` (vitessio#15897)

Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Harshit Gangal <[email protected]>
Co-authored-by: Harshit Gangal <[email protected]>
Co-authored-by: Deepthi Sigireddi <[email protected]>

* missing rename

Signed-off-by: Tim Vaillancourt <[email protected]>

* missing rename again

Signed-off-by: Tim Vaillancourt <[email protected]>

---------

Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Harshit Gangal <[email protected]>
Co-authored-by: Shlomi Noach <[email protected]>
Co-authored-by: Harshit Gangal <[email protected]>
Co-authored-by: Deepthi Sigireddi <[email protected]>
timvaillancourt added a commit to slackhq/vitess that referenced this pull request Jul 18, 2024
timvaillancourt added a commit to slackhq/vitess that referenced this pull request Jul 18, 2024
* `vtgate`: support filtering tablets by tablet-tags  (vitessio#15911)

Signed-off-by: Tim Vaillancourt <[email protected]>
Co-authored-by: Shlomi Noach <[email protected]>

* Add support for sampling rate in `streamlog` (vitessio#15919)

Signed-off-by: Tim Vaillancourt <[email protected]>

* Add sql text counts stats to `vtcombo`,`vtgate`+`vttablet` (vitessio#15897)

Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Harshit Gangal <[email protected]>
Co-authored-by: Harshit Gangal <[email protected]>
Co-authored-by: Deepthi Sigireddi <[email protected]>

---------

Signed-off-by: Tim Vaillancourt <[email protected]>
Signed-off-by: Harshit Gangal <[email protected]>
Co-authored-by: Shlomi Noach <[email protected]>
Co-authored-by: Harshit Gangal <[email protected]>
Co-authored-by: Deepthi Sigireddi <[email protected]>
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RFC: allow vtgate to filter tablets by tag K/Vs
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