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Doc tweaks

This commit is contained in:
derekwaynecarr 2015-01-23 12:41:44 -05:00
parent 24f580084e
commit 89f9224cc1
1 changed files with 8 additions and 2 deletions
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10
admission_control_resource_quota.md
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@ -77,7 +77,7 @@ The **ResourceQuota** plug-in introspects all incoming admission requests.
It makes decisions by evaluating the incoming object against all defined **ResourceQuota.Status.Hard** resource limits in the request
namespace. If acceptance of the resource would cause the total usage of a named resource to exceed its hard limit, the request is denied.
The following resource limits are imposed as part of core Kubernetes:
The following resource limits are imposed as part of core Kubernetes at the namespace level:
| ResourceName | Description |
| ------------ | ----------- |
@ -97,6 +97,10 @@ If the incoming request does not cause the total usage to exceed any of the enum
**ResourceQuota.ResourceVersion**. This keeps incremental usage atomically consistent, but does introduce a bottleneck (intentionally)
into the system.
To optimize system performance, it is encouraged that all resource quotas are tracked on the same **ResourceQuota** document. As a result,
its encouraged to actually impose a cap on the total number of individual quotas that are tracked in the **Namespace** to 1 by explicitly
capping it in **ResourceQuota** document.
## kube-apiserver
The server is updated to be aware of **ResourceQuota** objects.
@ -109,7 +113,9 @@ $ kube-apiserver -admission_control=ResourceQuota
## kube-controller-manager
A new controller is defined that runs a synch loop to run usage stats across the namespace.
A new controller is defined that runs a synch loop to calculate quota usage across the namespace.
**ResourceQuota** usage is only calculated if a namespace has a **ResourceQuota** object.
If the observed usage is different than the recorded usage, the controller sends a **ResourceQuotaUsage** resource
to the server to atomically update.