Ceph » ceph-volume

This happens because the 'backing devices' have the wrong identifier ("block" vs. "db"). The right change in zap.py is:

    backing_devices = [
        (journal_lvs, 'journal'),
        (db_lvs, 'db'),
        (wal_lvs, 'wal')
    ]

Additionally, the zapping of partitions was creating the following error:

--> Zapping: /dev/sdz1
Running command: /usr/sbin/wipefs --all /dev/sdz1
Running command: /bin/dd if=/dev/zero of=/dev/sdz1 bs=1M count=10
--> Destroying partition since --destroy was used: /dev/sdz1
Running command: /usr/sbin/parted /dev/sdz --script -- rm 1
--> Zapping: /dev/sdz2
Running command: /usr/sbin/wipefs --all /dev/sdz2
 stderr: wipefs: error: /dev/sdz2: probing initialization failed: No such file or directory
-->  RuntimeError: command returned non-zero exit status: 1

The immediate fix was to add a sleep before it:

        import time; time.sleep(2)
        wipefs(device.abspath)
        zap_data(device.abspath)

This is far from ideal, and what needs to happen here is to have a few try/except/sleeps so that this succeeds without problem when the "probing initialization failed: No such file or directory" message shows up.