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docs/Cluster-VictoriaMetrics.md: mention the vm_storage_is_read_only metric, which can help debugging readonly mode at vmstorage

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Aliaksandr Valialkin 2022-12-14 09:31:28 -08:00
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@ -287,7 +287,13 @@ See [troubleshooting docs](https://docs.victoriametrics.com/Troubleshooting.html
## Readonly mode
`vmstorage` nodes automatically switch to readonly mode when the directory pointed by `-storageDataPath` contains less than `-storage.minFreeDiskSpaceBytes` of free space. `vminsert` nodes stop sending data to such nodes and start re-routing the data to the remaining `vmstorage` nodes.
`vmstorage` nodes automatically switch to readonly mode when the directory pointed by `-storageDataPath`
contains less than `-storage.minFreeDiskSpaceBytes` of free space. `vminsert` nodes stop sending data to such nodes
and start re-routing the data to the remaining `vmstorage` nodes.
`vmstorage` sets `vm_storage_is_read_only` metric at `http://vmstorage:8482/metrics` to `1` when it enters read-only mode.
The metric is set to `0` when the `vmstorage` isn't in read-only mode.
## URL format