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Merge pull request #5779 from hashicorp/d-preemption-ent 

Add Enterprise docs for Preemption
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Mahmood Ali 2019-06-04 19:58:45 -04:00 committed by GitHub
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website/source/docs/enterprise/index.html.md
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@ -14,6 +14,8 @@ operational, and governance capabilities to Nomad. Namespaces allow multiple
teams to safely use a shared multi-region deployment. With Resource Quotas,
operators can limit resource consumption across teams or projects. Sentinel
policies enable enforcement of arbitrary fine-grained policies on job submission.
Preemption capabilities enable the scheduler to temporarily evict lower priority
allocations for service and batch jobs so that higher priority allocations can be placed.
Advanced Autopilot capabilities enable automated server upgrades, enhanced scalability
for reads and scheduling, and hot server failover on a per availability zone basis. See the
links below for a detailed overview of each feature.
@ -21,6 +23,7 @@ links below for a detailed overview of each feature.
- [Namespaces](/docs/enterprise/namespaces/index.html)
- [Resource Quotas](/docs/enterprise/quotas/index.html)
- [Sentinel Policies](/docs/enterprise/sentinel/index.html)
- [Preemption](/docs/enterprise/preemption/index.html)
- [Advanced Autopilot](/docs/enterprise/autopilot/index.html)
Click [here](https://www.hashicorp.com/go/nomad-enterprise) to set up a demo or request a trial

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website/source/docs/enterprise/preemption/index.html.md Normal file
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@ -0,0 +1,28 @@
---
layout: "docs"
page_title: "Nomad Enterprise Preemption"
sidebar_current: "docs-enterprise-preemption"
description: |-
Nomad Enterprise preemption capabilities enable the scheduler to temporarily
evict lower priority allocations for service and batch jobs so that
higher priority allocations can be placed.
---
# Nomad Enterprise Preemption
When a Nomad cluster is at capacity for a given set of placement constraints, any allocations
that result from a newly scheduled service or batch job will remain in the pending state until
sufficient resources become available - regardless of the defined priority.
[Preemption](/docs/internals/scheduling/preemption.html) capabilities in
[Nomad Enterprise](https://www.hashicorp.com/go/nomad-enterprise) enable the scheduler to temporarily
evict lower [priority](/docs/job-specification/job.html#priority) allocations from service and
batch jobs so that the allocations from higher priority jobs can be placed. This behavior
ensures that critical workloads can run when resources are limited or when partial outages require
workloads to be rescheduled across a smaller set of client nodes.
See the [Preemption internals documentation](/docs/internals/scheduling/preemption.html) for a
more detailed overview. Preemption for service and batch jobs can be enabled using the [scheduler config API endpoint](/api/operator.html#update-scheduler-configuration).
Click [here](https://www.hashicorp.com/go/nomad-enterprise) to set up a demo or
request a trial of Nomad Enterprise.

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website/source/layouts/docs.erb
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@ -530,6 +530,9 @@
<li<%= sidebar_current("docs-enterprise-sentinel") %>>
<a href="/docs/enterprise/sentinel/index.html">Sentinel Policies</a>
</li>
<li<%= sidebar_current("docs-enterprise-preemption") %>>
<a href="/docs/enterprise/preemption/index.html">Preemption</a>
</li>
<li<%= sidebar_current("docs-enterprise-autopilot") %>>
<a href="/docs/enterprise/autopilot/index.html">Advanced Autopilot</a>
</li>