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docs: recommendation for maximum number of template dependencies #20259

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Apr 4, 2024
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docs: recommendation for maximum number of template dependencies #20259

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12 changes: 12 additions & 0 deletions website/content/docs/job-specification/template.mdx
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Expand Up @@ -332,6 +332,18 @@ task "task" {
}
```

### Dependencies

For templates that read from Vault, Consul, or Nomad, each item read is called a
"dependency". All the `template` blocks share the same internal runner which
de-duplicates dependencies requesting the same item. You should avoid having
large numbers of dependencies for a given task, as each dependency requires at
least one concurrent request (a possibly blocking query) to the upstream
server. If a task has more than 128 dependencies, a warn-level log will appear
in the Nomad client logs which reports "watching this many dependencies could
DDoS your servers", referring to the Vault, Consul, or Nomad cluster being
queried.

## Nomad Integration

### Nomad Services
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