Bug 2343918
| Summary: | cephfs_mirror: incremental sync results in unidentical snapshots | ||
|---|---|---|---|
| Product: | [Red Hat Storage] Red Hat Ceph Storage | Reporter: | Jos Collin <jcollin> |
| Component: | CephFS | Assignee: | Venky Shankar <vshankar> |
| Status: | CLOSED ERRATA | QA Contact: | Hemanth Kumar <hyelloji> |
| Severity: | urgent | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 8.1 | CC: | ceph-eng-bugs, cephqe-warriors, gfarnum, ngangadh, tserlin |
| Target Milestone: | --- | ||
| Target Release: | 8.1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | ceph-19.2.1-73.el9cp | Doc Type: | No Doc Update |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2025-06-26 12:24:52 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Moving to ON_QA as this was fixed incidentally in https://bugzilla.redhat.com/show_bug.cgi?id=231773 Feel free to adjust status as desired with that information. :) Whoops, I meant https://bugzilla.redhat.com/show_bug.cgi?id=2317735 Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Important: Red Hat Ceph Storage 8.1 security, bug fix, and enhancement updates), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2025:9775 |
Description of problem: Incremental sync results in nonidentical source and destination snapshots for: 1. Incremental Syncing of already existing snapshots. 2. test_cephfs_mirror_incremental_sync in qa/tasks/cephfs/test_mirroring.py. Version-Release number of selected component (if applicable): 8.1 How reproducible: Intermittently. These issues are not always reproducible. Steps to Reproduce: 1. Incremental Syncing of already existing snapshots ------------------------------------- Mount: ``` $ sudo ./bin/mount.ceph admin@.a=/ /mnt/cephfs1 -o conf=$(pwd)/ceph.conf; $ sudo ./bin/mount.ceph admin@.remotefs=/ /mnt/cephfs2 -o conf=$(pwd)/ceph.conf; ``` Make some changes and take a snapshot: ``` $ mkdir -p /mnt/cephfs1/dir/d1 $ touch /mnt/cephfs1/dir/d1/file1 $ mkdir -p /mnt/cephfs1/dir/.snap/snap1; ``` Make some more changes & take another snapshot: ``` $ touch /mnt/cephfs1/dir/d1/file2 $ mkdir -p /mnt/cephfs1/dir/.snap/snap2; ``` Make a change and don't take snapshot: ` $ rm /mnt/cephfs1/dir/d1/file2 ` Add `dir` for mirroring: ` $ ./bin/ceph fs snapshot mirror add a /dir ` Results: ``` $ tree /mnt/cephfs1/dir/.snap /mnt/cephfs1/dir/.snap ├── snap1 │ └── d1 │ └── file1 └── snap2 └── d1 ├── file1 └── file2 ``` ``` $ tree /mnt/cephfs2/dir/.snap /mnt/cephfs2/dir/.snap ├── snap1 │ └── d1 │ └── file1 └── snap2 └── d1 └── file1 ``` ``` $ tree /mnt/cephfs1/dir /mnt/cephfs1/dir └── d1 └── file1 ``` ``` $ tree /mnt/cephfs2/dir /mnt/cephfs2/dir └── d1 └── file1 ``` 2. test_cephfs_mirror_incremental_sync in qa/tasks/cephfs/test_mirroring.py: ------------------------------------------------------------------------ The steps of test_cephfs_mirror_incremental_sync produces nonidentical source and destination snapshots after incremental sync of a repo (with .git directory). The checksum of .git directory differs. Actual results: 1. In the above example, /mnt/cephfs1/dir/.snap/snap2 and /mnt/cephfs2/dir/.snap/snap2 are different which is a bug. 2. Incremental sync of a repo produces nonidentical source and destination snapshots. Expected results: 1. /mnt/cephfs1/dir/.snap/snap2 and /mnt/cephfs2/dir/.snap/snap2 should be identical. 2. Incremental sync of a repo should produce identical source and destination snapshots. Additional info: