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Add pointer to DefaultStorageClass AC from PV doc (#6016)

reviewable/pr6069/r1
Qiming 2017-10-27 06:13:26 +08:00 committed by Steve Perry
parent 69c6cb07de
commit ec21a413b7
1 changed files with 13 additions and 1 deletions
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14
docs/concepts/storage/persistent-volumes.md
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@ -50,7 +50,19 @@ There are two ways PVs may be provisioned: statically or dynamically.
A cluster administrator creates a number of PVs. They carry the details of the real storage which is available for use by cluster users. They exist in the Kubernetes API and are available for consumption.
#### Dynamic
When none of the static PVs the administrator created matches a user's `PersistentVolumeClaim`, the cluster may try to dynamically provision a volume specially for the PVC. This provisioning is based on `StorageClasses`: the PVC must request a class and the administrator must have created and configured that class in order for dynamic provisioning to occur. Claims that request the class `""` effectively disable dynamic provisioning for themselves.
When none of the static PVs the administrator created matches a user's `PersistentVolumeClaim`,
the cluster may try to dynamically provision a volume specially for the PVC.
This provisioning is based on `StorageClasses`: the PVC must request a class and
the administrator must have created and configured that class in order for dynamic
provisioning to occur. Claims that request the class `""` effectively disable
dynamic provisioning for themselves.
To enable dynamic storage provisioning based on storage class, the cluster administrator
needs to enable the `DefaultStorageClass` [admission controller](/docs/admin/admission-controllers/#defaultstorageclass)
on the API server. This can be done, for example, by ensuring that `DefaultStorageClass` is
among the comma-delimited, ordered list of values for the `--admission-control` flag of
the API server component. For more information on API server command line flags,
please check [kube-apiserver](/docs/admin/kube-apiserver/) documentation.
### Binding