Understand volumes
You can provide persistent or temporary storage for your applications by mounting volumes to pods and containers. Using volumes ensures that data remains available even if a container restarts by backing the file system with host-local or network-attached storage.
Volumes are mounted file systems available to pods and their containers which may be backed by a number of host-local or network attached storage endpoints. Containers are not persistent by default; on restart, their contents are cleared.
To ensure that the file system on the volume contains no errors and, if errors
are present, to repair them when possible, OpenShift Container Platform invokes the fsck
utility prior to the mount utility. This occurs when either adding a volume or
updating an existing volume.
The simplest volume type is emptyDir, which is a temporary directory on a
single machine. Administrators may also allow you to request a persistent volume that is automatically attached
to your pods.
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