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Bug #54017

closed

Problem with ceph fs snapshot mirror and read-only folders

Added by Manuel Holtgrewe over 2 years ago. Updated almost 1 year ago.

Status:
Duplicate
Priority:
Normal
Assignee:
Milind Changire
Category:
Correctness/Safety
Target version:
Ceph - v18.0.0
% Done:

0%

Source:
Community (user)
Tags:
Backport:
quincy, pacific
Regression:
No
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
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