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Update design doc for limit range change

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This commit is contained in:
derekwaynecarr 2015-04-01 16:40:27 -04:00
parent c2b670513c
commit dbe4d42934
1 changed files with 16 additions and 6 deletions
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22
docs/design/admission_control_limit_range.md
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@ -25,6 +25,8 @@ type LimitRangeItem struct {
Max ResourceList `json:"max,omitempty"`
// Min usage constraints on this kind by resource name
Min ResourceList `json:"min,omitempty"`
// Default usage constraints on this kind by resource name
Default ResourceList `json:"default,omitempty"`
}
// LimitRangeSpec defines a min/max usage limit for resources that match on kind
@ -74,6 +76,14 @@ The following min/max limits are imposed:
| cpu | Min/Max amount of cpu per pod |
| memory | Min/Max amount of memory per pod |
If a resource specifies a default value, it may get applied on the incoming resource. For example, if a default
value is provided for container cpu, it is set on the incoming container if and only if the incoming container
does not specify a resource requirements limit field.
If a resource specifies a min value, it may get applied on the incoming resource. For example, if a min
value is provided for container cpu, it is set on the incoming container if and only if the incoming container does
not specify a resource requirements requests field.
If the incoming object would cause a violation of the enumerated constraints, the request is denied with a set of
messages explaining what constraints were the source of the denial.
@ -105,12 +115,12 @@ NAME
limits
$ kubectl describe limits limits
Name: limits
Type Resource Min Max
---- -------- --- ---
Pod memory 1Mi 1Gi
Pod cpu 250m 2
Container memory 1Mi 1Gi
Container cpu 250m 2
Type Resource Min Max Default
---- -------- --- --- ---
Pod memory 1Mi 1Gi -
Pod cpu 250m 2 -
Container memory 1Mi 1Gi 1Mi
Container cpu 250m 250m 250m
```
## Future Enhancements: Define limits for a particular pod or container.