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cmd/prometheus: add default values for agent min/max retention flags (#18261)

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* cmd/prometheus: add default values for agent min/max retention flags

Signed-off-by: GeorgeTyupin <GeorgyTyupin@ya.ru>

* docs: update command-line flags documentation

Signed-off-by: GeorgeTyupin <GeorgyTyupin@ya.ru>

* chore: trigger CI (retry 4)

Signed-off-by: GeorgeTyupin <GeorgyTyupin@ya.ru>

* Reuse db.go constants for agent retention flags to avoid duplication.

Signed-off-by: GeorgeTyupin <GeorgyTyupin@ya.ru>

---------

Signed-off-by: GeorgeTyupin <GeorgyTyupin@ya.ru>
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GeorgeTyupin 2026-04-21 14:22:15 +03:00 committed by GitHub
parent 40efbd55b9
commit e0ea05665a
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2 changed files with 8 additions and 4 deletions
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8
cmd/prometheus/main.go
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@ -541,13 +541,17 @@ func main() {
"The frequency at which to truncate the WAL and remove old data.").
Hidden().PlaceHolder("<duration>").SetValue(&cfg.agent.TruncateFrequency)
// Dynamically calculate the format strings from the tsdb/agent constants
agentDefaultMinWALTime := model.Duration(agent.DefaultMinWALTime * int64(time.Millisecond)).String()
agentDefaultMaxWALTime := model.Duration(agent.DefaultMaxWALTime * int64(time.Millisecond)).String()
agentOnlyFlag(a, "storage.agent.retention.min-time",
"Minimum age samples may be before being considered for deletion when the WAL is truncated").
SetValue(&cfg.agent.MinWALTime)
Default(agentDefaultMinWALTime).SetValue(&cfg.agent.MinWALTime)
agentOnlyFlag(a, "storage.agent.retention.max-time",
"Maximum age samples may be before being forcibly deleted when the WAL is truncated").
SetValue(&cfg.agent.MaxWALTime)
Default(agentDefaultMaxWALTime).SetValue(&cfg.agent.MaxWALTime)
agentOnlyFlag(a, "storage.agent.no-lockfile", "Do not create lockfile in data directory.").
Default("false").BoolVar(&cfg.agent.NoLockfile)

4
docs/command-line/prometheus.md
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@ -41,8 +41,8 @@ The Prometheus monitoring server
| <code class="text-nowrap">--storage.tsdb.delay-compact-file.path</code> | Path to a JSON file with uploaded TSDB blocks e.g. Thanos shipper meta file. If set TSDB will only compact 1 level blocks that are marked as uploaded in that file, improving external storage integrations e.g. with Thanos sidecar. 1+ level compactions won't be delayed. Use with server mode only. | |
| <code class="text-nowrap">--storage.agent.path</code> | Base path for metrics storage. Use with agent mode only. | `data-agent/` |
| <code class="text-nowrap">--storage.agent.wal-compression</code> | Compress the agent WAL. If false, the --storage.agent.wal-compression-type flag is ignored. Use with agent mode only. | `true` |
| <code class="text-nowrap">--storage.agent.retention.min-time</code> | Minimum age samples may be before being considered for deletion when the WAL is truncated Use with agent mode only. | |
| <code class="text-nowrap">--storage.agent.retention.max-time</code> | Maximum age samples may be before being forcibly deleted when the WAL is truncated Use with agent mode only. | |
| <code class="text-nowrap">--storage.agent.retention.min-time</code> | Minimum age samples may be before being considered for deletion when the WAL is truncated Use with agent mode only. | `5m` |
| <code class="text-nowrap">--storage.agent.retention.max-time</code> | Maximum age samples may be before being forcibly deleted when the WAL is truncated Use with agent mode only. | `4h` |
| <code class="text-nowrap">--storage.agent.no-lockfile</code> | Do not create lockfile in data directory. Use with agent mode only. | `false` |
| <code class="text-nowrap">--storage.remote.flush-deadline</code> | How long to wait flushing sample on shutdown or config reload. | `1m` |
| <code class="text-nowrap">--storage.remote.read-sample-limit</code> | Maximum overall number of samples to return via the remote read interface, in a single query. 0 means no limit. This limit is ignored for streamed response types. Use with server mode only. | `5e7` |