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upgrade guide for 0.10.0 (#6266)

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Jasmine Dahilig 2019-09-05 13:27:37 -07:00 committed by GitHub
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website/source/guides/upgrade/upgrade-specific.html.md
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@ -15,6 +15,35 @@ details provided for their upgrades as a result of new features or changed
behavior. This page is used to document those details separately from the
standard upgrade flow.
## Nomad 0.10.0
### Deployments
Nomad 0.10 enables rolling deployments for service jobs by default
and adds a default update stanza when a service job is created or updated.
This does not affect jobs with an update stanza.
In pre-0.10 releases, when updating a service job without an update stanza,
all existing allocations are stopped while new allocations start up,
and this may cause a service degradation or an outage.
You can regain this behavior and disable deployments by setting `max_parallel` to 0.
For more information, see [`update` stanza][update].
### Raft 3
Nomad 0.10 defaults to Raft 3 which includes [Autopilot](/guides/operations/autopilot.html),
operator-friendly automatic cluster management.
Once all servers are upgraded and running with Raft protocol version 3, autopilot features are enabled.
If existing servers are still on Raft protocol version 1,
new servers will need [`raft_protocol`](/docs/configuration/server.html#raft_protocol)
set to 2, in order to maintain backwards compatibility with
the old servers during the upgrade. After the servers have been migrated to
version 0.10.0 with Raft protocol version 2, `raft_protocol` can be moved up to 3 and the servers restarted
to match the default.
For more information on upgrading Raft, see [Upgrading to Raft Protocol 3](/guides/upgrade/upgrade-specific.html#upgrading-to-raft-protocol-3).
## Nomad 0.9.0
### Preemption
@ -142,7 +171,7 @@ Raft Protocol versions supported by each Nomad version:
<td>1</td>
</tr>
<tr>
<td>0.8</td>
<td>0.8 and later</td>
<td>1, 2, 3</td>
</tr>
</table>
@ -347,3 +376,4 @@ deleted and then Nomad 0.3.0 can be launched.
[preemption]: /docs/internals/scheduling/preemption.html
[task-config]: /docs/job-specification/task.html#config
[validate]: /docs/commands/job/validate.html
[update]: /docs/job-specification/update.html