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Merge pull request #7945 from hashicorp/docs-cronexpr-dst-fix 

Document daylight saving handling
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Chris Baker 2020-05-13 14:13:29 -05:00 committed by GitHub
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CHANGELOG.md
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@ -16,11 +16,14 @@ BUG FIXES:
* api: validate scale count value is not negative [[GH-7902](https://github.com/hashicorp/nomad/issues/7902)]
* api: autoscaling policies should not be returned for stopped jobs [[GH-7768](https://github.com/hashicorp/nomad/issues/7768)]
* client: Fixed a bug where an multi-task allocation maybe considered unhealthy if some tasks are slow to start [[GH-7944](https://github.com/hashicorp/nomad/issues/7944)]
* core: job scale status endpoint was returning incorrect counts [[GH-7789](https://github.com/hashicorp/nomad/issues/7789)]
* core: Fixed bugs related to periodic jobs scheduled during daylight saving transition periods [[GH-7894](https://github.com/hashicorp/nomad/issues/7894)]
* core: Fixed a bug where scores for allocations were biased toward nodes with resource reservations [[GH-7730](https://github.com/hashicorp/nomad/issues/7730)]
* csi: Fixed checking of volume validation responses from plugins [[GH-7831](https://github.com/hashicorp/nomad/issues/7831)]
* csi: Fixed counting of healthy and expected plugins after plugin job updates or stops [[GH-7844](https://github.com/hashicorp/nomad/issues/7844)]
* csi: Added checkpointing to volume claim release to avoid unreleased claims on plugin errors [[GH-7782](https://github.com/hashicorp/nomad/issues/7782)]
* driver/docker: Fixed a bug preventing garbage collecting unused docker images [[GH-7947](https://github.com/hashicorp/nomad/issues/7947)]
* jobspec: autoscaling policy block should return a parsing error multiple `policy` blocks are provided [[GH-7716](https://github.com/hashicorp/nomad/issues/7716)]
* ui: Fixed a bug where exec popup had incorrect URL for jobs where name ≠ id [[GH-7814](https://github.com/hashicorp/nomad/issues/7814)]

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website/pages/docs/job-specification/periodic.mdx
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@ -74,5 +74,15 @@ periodic {
}
```
## Periodic Jobs and Daylight Saving Time
Though Nomad supports configuring time_zone, we strongly recommend that periodic
jobs are specified with respect to UTC time_zone.
Daylight saving changes may cause jobs to run in times unexpected to operator: A
2.30am nightly job with `America/New_York` time zone will not run on the day
daylight saving time start; a 1.30am nightly job will run twice on the day
daylight saving time ends.
[batch-type]: /docs/job-specification/job#type 'Batch scheduler type'
[cron]: https://github.com/gorhill/cronexpr#implementation 'List of cron expressions'

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website/pages/docs/upgrade/upgrade-specific.mdx
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@ -31,6 +31,17 @@ the bug fix will only minimally affect scoring.
Feasability (whether a node is capable of running a job at all) is *not*
affected.
### Periodic Jobs and Daylight Saving Time
Nomad 0.11.2 fixed a long outstanding bug affecting periodic jobs that are
scheduled to run during daylight saving transition time.
Nomad 0.11.2 provides a more defined behvior: nomad evaluates the cron
expression with respect to specified time zone during transition. A 2.30am
nightly job with `America/New_York` time zone will not run on the day daylight
saving time start; similarly, a 1.30am nightly job will run twice on the day
daylight saving time ends.
## Nomad 0.11.0
### client.template: `vault_grace` deprecation