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swarm-victorialogs: size the agent-auth limit for a host booting its agents together

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All agents on a host reach the gateway from one address and share one
limit_req budget; a host boot is one cache miss per agent at once.
Defaults go from 5r/s burst 20 to 50r/s burst 500. The module-eval case
reads the option values.
This commit is contained in:
atlas 2026-10-13 10:09:01 +02:00 • committed by mara
commit bff605035c
3 changed files with 18 additions and 15 deletions
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16
docs/swarm/services.md
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@ -184,14 +184,14 @@ Drilldown_ app is deliberately not installed: it only supports Loki, and
no setting here changes that, so Explore is the log browser for this
swarm.
| Option | When you'd touch it |
| ------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `deploy.victorialogs.retentionPeriod` | Default `30d`, far shorter than the metrics store's — logs are bulkier per unit of value and are typically read within days of ingestion. Raise it if you need to answer questions about last quarter. |
| `deploy.victorialogs.authRate` | Default `5r/s` per client address, for agent queries checked by `swarm-logs-auth`; over it and `authBurst`, the gateway answers 403. Raise it if many agents share one address and query at once. |
| `deploy.victorialogs.authBurst` | Default `20` requests above `authRate` before the 403s start. |
| `deploy.victorialogs.authVerdictTtl` | Default `60` seconds that `swarm-logs-auth` keeps granting an agent secret it verified, without asking the secret store. A replaced or deleted secret keeps working at the log store for up to that long. |
| `swarm.victorialogs.domain` | Only to rename it. |
| `swarm.victorialogs.port` | Only if something else on the services host already claims `9428`. |
| Option | When you'd touch it |
| ------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `deploy.victorialogs.retentionPeriod` | Default `30d`, far shorter than the metrics store's — logs are bulkier per unit of value and are typically read within days of ingestion. Raise it if you need to answer questions about last quarter. |
| `deploy.victorialogs.authRate` | Default `50r/s` per client address, for agent queries checked by `swarm-logs-auth`; over it and `authBurst`, the gateway answers 403. Agents on one host share the address; the default covers about a hundred cold-starting together. |
| `deploy.victorialogs.authBurst` | Default `500` requests above `authRate` before the 403s start. |
| `deploy.victorialogs.authVerdictTtl` | Default `60` seconds that `swarm-logs-auth` keeps granting an agent secret it verified, without asking the secret store. A replaced or deleted secret keeps working at the log store for up to that long. |
| `swarm.victorialogs.domain` | Only to rename it. |
| `swarm.victorialogs.port` | Only if something else on the services host already claims `9428`. |
Like the metrics store, it binds loopback and takes no credential of its
own: the gateway vhost is the only way in, and the collector is the only