71 lines
1.6 KiB
Markdown
71 lines
1.6 KiB
Markdown
---
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layout: "docs"
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page_title: "update Stanza - Job Specification"
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sidebar_current: "docs-job-specification-update"
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description: |-
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The "update" stanza specifies the job update strategy. The update strategy is
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used to control things like rolling upgrades. If omitted, rolling updates are
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disabled.
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---
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# `update` Stanza
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<table class="table table-bordered table-striped">
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<tr>
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<th width="120">Placement</th>
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<td>
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<code>job -> **update**</code>
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</td>
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</tr>
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</table>
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The `update` stanza specifies the job update strategy. The update strategy is
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used to control things like rolling upgrades. If omitted, rolling updates are
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disabled.
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```hcl
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job "docs" {
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update {
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max_parallel = 3
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stagger = "30s"
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}
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}
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```
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## `update` Parameters
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- `max_parallel` `(int: 0)` - Specifies the number of task groups that can be
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updated at the same time.
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- `stagger` `(string: "0ms")` - Specifies the delay between sets of updates.
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This is specified using a label suffix like "30s" or "1h".
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## `update` Examples
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The following examples only show the `update` stanzas. Remember that the
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`update` stanza is only valid in the placements listed above.
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### Serial Upgrades
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This example uses a serial upgrade strategy, meaning exactly one task group will
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be updated at a time, waiting 60 seconds until the next task group is upgraded.
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```hcl
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update {
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max_parallel = 1
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stagger = "60s"
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}
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```
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### Parallel Upgrades
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This example performs 10 upgrades at a time, waiting 30 seconds before moving on
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to the next batch:
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```hcl
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update {
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max_parallel = 10
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stagger = "30s"
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}
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```
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