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fix: synchronize CPU resource metrics reads

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Hold resourceMetricsMapMu.RLock while the v3 CPU collector reads both the
subsystem map and its nested idle/iowait metrics. The unsynchronized reads
were inherited from upstream commit f7b665347 (minio/minio#19560).

Add value and concurrent Prometheus Gather regression tests, run them in
the targeted race CI job, and record the existing CPU metric names in the
compatibility inventory.

Fixes #210

Signed-off-by: Feng Ruohang <rh@vonng.com>
This commit is contained in:
Feng Ruohang
2026-09-16 17:09:19 +08:00
parent f99ed829b5
commit 027d43b4eb
4 changed files with 198 additions and 0 deletions
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buildscripts/rebrand-guard/compat-baseline.json
+8
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@@ -571,6 +571,14 @@
"minio_resource_stats",
"minio_s3",
"minio_stats",
"minio_system_cpu_avg_idle",
"minio_system_cpu_avg_iowait",
"minio_system_cpu_load",
"minio_system_cpu_load_perc",
"minio_system_cpu_nice",
"minio_system_cpu_steal",
"minio_system_cpu_system",
"minio_system_cpu_user",
"minio_test"
],
"headers": [