“Failed to start Ceph object storage daemon” is an error message that indicates an issue with starting one of the Ceph OSDs in a Ceph cluster. Bobcares, as a part of our Server Management Service offers solutions to every query that comes our way.

“Failed to start Ceph object storage daemon” Error

An error message reading “Failed to start Ceph object storage daemon” denotes a problem starting one of the Ceph OSDs in a Ceph cluster. In Ceph, OSDs are in charge of handling read/write operations as well as storing data. So, data accessibility and cluster performance issues may result from an OSD’s inability to start.

Failed to start Ceph object storage daemon | Fix

There are a number of causes for an OSD not to start. Here are a few typical causes and solutions:

1. Errors in Configuration: Firstly, verify the OSD configuration file for any mistakes or errors. The /etc/ceph/ directory is often where we may find the OSD setup file. Also, ensure that the Ceph cluster and monitors are correctly pointing to by the OSD.

2. Issues with Permission: Then make sure to see that the OSD has access to and the required permissions for the storage devices where it saves data. Read-write access to the underlying storage devices or directories is often necessary for OSDs.

3. Storage Device Issues: If the OSD makes use of a physical device, look for any hardware problems that prevent the OSD from booting.

4. Insufficient Disk Space: Also, make sure the OSD’s storage device has enough free space for it to function. Else, the OSD may not be able to start if the device is full or nearly full.

5. Network connectivity issues: Connectivity allows Ceph OSDs to interact with other cluster members, including monitors and other OSDs. So, verify the network’s connectivity and make sure that the OSD and other Ceph nodes can communicate without being hindered by firewall rules.

6. Journal corruption: The OSD journal is essential for the reliability and efficiency of the data. Sometimes the OSD may be unable to launch if the OSD journal is damaged. In order to fix the problem, we need to clear or repair the journal.

7. Systemd Service: Check the OSD’s systemd service status and logs for any issues or hints as to why the OSD failed to start if we are using systemd to manage services.

8. Ceph Health Status: Use the Ceph health command to view the general health status of the Ceph cluster. Sometimes, more serious cluster difficulties can be the root cause of OSD failures.

9. Check OSD Logs: Finally, look through the OSD’s log files for any error or warning messages that can provide insight into the cause of the failure. /var/log/ceph/ is often where OSD logs are kept.

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Conclusion

The article provides 9 possible causes and solutions for the “Failed to start Ceph object storage daemon” error.