Commit Graph
2 Commits
Author SHA1 Message Date
rmancinasandClaude Opus 5 fe761e119e feat(ops): show relay apply progress on the replication card
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Seconds_Behind_Source cannot answer "is it moving?". While the SQL thread
works through one large transaction the lag counter holds still — often at
0 — even though the replica is not caught up. The relay backlog does move,
and it comes out of the SHOW REPLICA STATUS the panel already runs, so this
costs no extra query and no connection to the source.

Adds applyProgress(), which reads Source_Log_File / Read_Source_Log_Pos vs
Relay_Source_Log_File / Exec_Source_Log_Pos and reports the fetched-but-not-
applied byte delta plus a percentage. Both positions are source binlog
coordinates, so they are only comparable while the two threads are on the
same file; across files the delta is meaningless (positions restart at ~4 in
each new file) and is reported as null rather than as a huge negative number.

The percentage deliberately stops at 99.99 while any backlog remains —
binlog positions are large enough that a real backlog of a few KB rounds to
100% and would render a lagging replica as caught up.

Not folded into `healthy`: a non-zero backlog is the normal state of a
working replica between fetch and apply, so alarming on it would cry wolf.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-04 21:35:39 -07:00
rmancinasandClaude Opus 5 eef9a5f4c8 fix(ops): stop the replica field parser reading the next line
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The panel reported "Error SQL: Replicate_Ignore_Server_Ids:" against a
replica that was healthy — both threads running, zero lag.

`\s` matches newlines in JavaScript, so `^\s*NAME:\s*(.*)$` let the `\s*`
after the colon walk past an EMPTY field's line break and capture the
following line. Last_SQL_Error is blank on a healthy replica and
Replicate_Ignore_Server_Ids happens to be printed immediately after it, so
the blank error field returned the next field's name as its value. Every
empty field was affected; the visible damage was that a healthy replica
rendered as broken, which is the worst direction for a health panel to fail.

Fixed with `[^\S\n]` — horizontal whitespace only — on both sides of the
field name.

Extracted as replicaField() and pinned by replication.spec.ts against the
verbatim output of the live replica, keeping the empty Last_SQL_Error
adjacent to Replicate_Ignore_Server_Ids because that exact adjacency is what
broke. Also covers the literal "NULL" lag surviving as a distinct value from
empty, and a field name that is a suffix of another (Last_Error vs
Last_SQL_Error) not matching the wrong line.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-03 17:40:49 -07:00