Online DDL: publish `vreplication_lag_seconds` from vreplication progress

shlomi-noach commented 1 day ago

Description

A new column in schema_migrations: vreplication_lag_seconds publishes the vreplication (rather, vplayer) lag on a vreplication migration. This is computed by the higher difference of vreplication's time updted and transaction timestamp compared with time now.

This just adds more visibility into the underlying workflow.

Related Issue(s)

https://github.com/vitessio/vitess/issues/17264

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

Deployment Notes

vitess-bot[bot] commented 1 day ago

Review Checklist

Hello reviewers! :wave: 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.

Tests

[ ] Bug fixes should have at least one unit or end-to-end test, enhancement and new features should have a sufficient number of tests.

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[ ] There should be a comment at the top of each new or modified test to explain what the test does.

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Backward compatibility

[ ] Protobuf changes should be wire-compatible.
[ ] Changes to _vt tables and RPCs need to be backward compatible.
[ ] RPC changes should be compatible with vitess-operator
[ ] If a flag is removed, then it should also be removed from vitess-operator and arewefastyet, if used there.
[ ] vtctl command output order should be stable and awk-able.

codecov[bot] commented 1 day ago

Codecov Report

Attention: Patch coverage is 0% with 44 lines in your changes missing coverage. Please review.

Project coverage is 67.37%. Comparing base (c5d0ecc) to head (ba6d68a).

Files with missing lines	Patch %	Lines
go/vt/vttablet/onlineddl/executor.go	0.00%	34 Missing :warning:
go/vt/vttablet/onlineddl/vrepl.go	0.00%	10 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #17263 +/- ## ======================================= Coverage 67.37% 67.37% ======================================= Files 1573 1573 Lines 253110 253114 +4 ======================================= + Hits 170535 170547 +12 + Misses 82575 82567 -8 ```

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vitessio / vitess