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