WAL-G textfile metrics missing on CT 113 #16

New Issue

2026-05-27T05:56:51Z

fkrebs commented

2026-05-27 05:56:51 +00:00

Problem

/var/lib/node_exporter/walg-metrics.prom no longer exists on CT 113. Was set up 2026-05-23. Prometheus alert WalgArchiveStale will fire or already has.

Investigate

SSH to CT 113, check if the file exists and at what path
Check cron job / systemd timer that writes the metrics file
Check node_exporter textfile collector config — is it pointed at the right dir?
If cron broke, re-deploy and verify the file is written on next run
Silence or resolve the Prometheus alert once fixed

Context

WAL-G is used for Postgres WAL archiving from CT 113 (shared-db). Metrics are scraped by Prometheus on CT 109 to detect archiving staleness.

## Problem `/var/lib/node_exporter/walg-metrics.prom` no longer exists on CT 113. Was set up 2026-05-23. Prometheus alert `WalgArchiveStale` will fire or already has. ## Investigate - [ ] SSH to CT 113, check if the file exists and at what path - [ ] Check cron job / systemd timer that writes the metrics file - [ ] Check node_exporter textfile collector config — is it pointed at the right dir? - [ ] If cron broke, re-deploy and verify the file is written on next run - [ ] Silence or resolve the Prometheus alert once fixed ## Context WAL-G is used for Postgres WAL archiving from CT 113 (shared-db). Metrics are scraped by Prometheus on CT 109 to detect archiving staleness.

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Reference: fkrebs/docs#16