Software incompatibility detected between Commvault Intellisnap backup software and lvm2-lvmetad.service/socket.

This document (000020734) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP5
SUSE Linux Enterprise Desktop 12 SP5

Situation

The issue is detected with SLES12 SP5, but it can also be observed with other SLES/SLED versions or configurations using lvmetad and running the 3rd party Commvault Intellisnap solution.

First, check if the system is using lvmetad for lvm metadata caching, like so:

hostname:~ # grep "use_lvmetad =" /etc/lvm/lvm.conf
        use_lvmetad = 1

If the boolean is true, then the system is using lvmetad.

hostname:~ # systemctl status lvm2-lvmetad.service
â lvm2-lvmetad.service
   Loaded: masked (/dev/null; masked)
   Active: inactive (dead) since Fri 2022-08-19 20:56:52 CEST; 2 days ago
Main PID: 1682 (code=exited, status=0/SUCCESS)
Aug 19 18:03:11 hostname systemd[1]: Started LVM2 metadata daemon.
Aug 19 20:56:52 hostname systemd[1]: Stopping LVM2 metadata daemon...
Aug 19 20:56:52 hostname systemd[1]: Stopped LVM2 metadata daemon.
Aug 19 20:56:52 hostname systemd[1]: Stopped LVM2 metadata daemon.

When using the Intellisnap software, on checking the status of the lvm2-lvmetad.service:

systemctl status lvm2-lvmetad.socket

...the result will appear as masked.

This may lead to the system entering initramfs (maintenance mode) on next reboot, depending on your lvm configuration.

Resolution

You might have to manually re-enable the lvmetad:

# systemctl enable lvm2-lvmetad.service
# systemctl enable lvm2-lvmetad.socket

If the system is in maintenance mode upon reboot, please start the following services:

# systemctl start lvm2-lvmetad.service
# systemctl start lvm2-lvmetad.socket

Cause

The Commvault backup software masks the lvmetad service and socket, which when combined with a configuration that depends on lvmetad can lead to an inability to find appropriate devices necessary for boot

Additional Information

The Commvault software vendor can answer any further inquiries.

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

Document ID:000020734
Creation Date: 24-Aug-2022
Modified Date:14-Sep-2022
- SUSE Linux Enterprise Desktop
- SUSE Linux Enterprise High Availability Extension
- SUSE Linux Enterprise Server
- SUSE Linux Enterprise Server for SAP Applications
- SUSE Linux Enterprise HPC