Bug #54017: Problem with ceph fs snapshot mirror and read-only folders - CephFS - Ceph

Bug #54017

Problem with ceph fs snapshot mirror and read-only folders

Added by Manuel Holtgrewe almost 2 years ago. Updated 7 months ago.

Status:

Duplicate

Priority:

Normal

Assignee:

Milind Changire

Category:

Correctness/Safety

Target version:

Ceph - v18.0.0

% Done:

Source:

Community (user)

Tags:

Backport:

quincy, pacific

Regression:

Severity:

2 - major

Reviewed:

Affected Versions:

ceph-qa-suite:

Component(FS):

cephfs-mirror, libcephfs

Labels (FS):

Pull request ID:

Crash signature (v1):

Crash signature (v2):

Description

I want to mirror a snapshot in Ceph v16.2.6 deployed with cephadm using the stock quay.io images. My source file system has a folder "/src/folder/x" where "/src/folder" has mode "ug=r,o=", in other words no write permissions for the owner (root).

The sync of a snapshot "initial" now fails with the following log excerpt.

remote_mkdir: remote epath=./src/folder/x
remote_mkdir: failed to create remote directory=./src/folder/x: (13) Permission denied
do_synchronize: closing local directory=./src/folder
do_synchronize: closing local directory=./src/
do_synchronize: closing local directory=.
post_sync_close_handles
do_sync_snaps: failed to synchronize dir_root=/src/folder, snapshot=initial
sync_snaps: failed to sync snapshots for dir_root=/src/folder

The capabilites on the remote are

client.mirror-tier-2-remote
       key: REDACTED
       caps: [mds] allow * fsname=cephfs
       caps: [mon] allow r fsname=cephfs
       caps: [osd] allow * tag cephfs data=cephfs