Chapter 8. Ceph File System snapshots

Procedure

1. Log into the Cephadm shell:

   Example

   [root@mds ~]# cephadm shell

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2. For existing Ceph File Systems, enable the snapshotting feature:

   Syntax

   ceph fs set FILE_SYSTEM_NAME allow_new_snaps true

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   Example

   [ceph: root@mds ~]# ceph fs set cephfs01 allow_new_snaps true

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3. Create a new snapshot subdirectory under the .snap directory:

   Syntax

   mkdir NEW_DIRECTORY_PATH

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   Example

   [ceph: root@mds ~]# mkdir /.snap/new-snaps

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   This example creates the new-snaps subdirectory, and this informs the Ceph Metadata Server (MDS) to start making snapshots.

   1. To delete snapshots:

      Syntax

      rmdir NEW_DIRECTORY_PATH

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      Example

      [ceph: root@mds ~]# rmdir /.snap/new-snaps

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      Important

      Attempting to delete root-level snapshots, which might contain underlying snapshots, will fail.