kubernetes
/
website
mirror of https://github.com/kubernetes/website.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Add that pv's access modes are not constraints on the volume.

This commit is contained in:
s-kawamura-w664 2022-02-25 09:11:00 +00:00
parent 3470795b2a
commit f26337fadc
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
content/en/docs/concepts/storage/persistent-volumes.md
View File

@ -477,6 +477,15 @@ In the CLI, the access modes are abbreviated to:
* RWX - ReadWriteMany
* RWOP - ReadWriteOncePod
{{< note >}}
Kubernetes uses volume access modes to match PersistentVolumeClaims and PersistentVolumes.
In some cases, the volume access modes also constrain where the PersistentVolume can be mounted.
Volume access modes do **not** enforce write protection once the storage has been mounted.
Even if the access modes are specified as ReadWriteOnce, ReadOnlyMany, or ReadWriteMany, they don't set any constraints on the volume.
For example, even if a PersistentVolume is created as ReadOnlyMany, it is no guarantee that it will be read-only.
If the access modes are specified as ReadWriteOncePod, the volume is constrained and can be mounted on only a single Pod.
{{< /note >}}
> __Important!__ A volume can only be mounted using one access mode at a time, even if it supports many. For example, a GCEPersistentDisk can be mounted as ReadWriteOnce by a single node or ReadOnlyMany by many nodes, but not at the same time.