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Observation¶

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Firing
s390zl12: partitions usage (%) alert
View alert
Values
A0=88.11778063708574
Labels
alertname s390zl12: partitions usage (%) alert
grafana_folder Generic
hostname s390zl12
rule_uid partitions_usage_alert_s390zl12
type generic
Silence
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Observed 32s before this notification was delivered, at 2023-11-15 03:48:00 +0100 CET

panel link http://stats.openqa-monitor.qa.suse.de/d/GDs390zl12?orgId=1&viewPanel=65090

From s390zl12

/dev/mapper/3600507638081855cd80000000000004b-part1 on /var/lib/libvirt/images type ext4 (rw,relatime,nobarrier,stripe=8,data=writeback)

so maybe as expected this was about /var/lib/libvirt/images and monitoring shows this to trigger from time to time again. okurz does not think it's wise to just brute-force delete by the cron job calling https://gitlab.suse.de/openqa/salt-states-openqa/-/blob/master/libvirt/cleanup-openqa-assets?ref_type=heads more often but instead a better solution should be found to prevent overflowing storage.

Suggestions¶

• DONE So we see that at least one partition was 88% full which is apparently above our threshold
• DONE Check the actual threshold
• DONE Ensure that our NFS share from OSD is not the one we alert about
• DONE There is a cleanup script triggered by cron or systemd timer (TBC) which might trigger less often than what we check the partition usage for so maybe that is racy
• Reduce the cron run interval anyway and unsilence to make it more likely to prevent alerts

Rollback actions¶

• Remove silence for rule_uid=~partitions_usage_alert_s390zl.* from https://stats.openqa-monitor.qa.suse.de/alerting/silences