Comment 56 for bug 1828617

$ apt-cache policy ceph-osd
ceph-osd:
  Installed: 13.2.6-0ubuntu0.19.04.4
  Candidate: 13.2.6-0ubuntu0.19.04.4
  Version table:
 *** 13.2.6-0ubuntu0.19.04.4 500
        500 http://archive.ubuntu.com/ubuntu disco-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     13.2.6-0ubuntu0.19.04.3 500
        500 http://nova.clouds.archive.ubuntu.com/ubuntu disco-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu disco-security/main amd64 Packages
     13.2.4+dfsg1-0ubuntu2 500
        500 http://nova.clouds.archive.ubuntu.com/ubuntu disco/main amd64 Packages

disco-proposed tested with a deployment using separate db and wal devices; OSD's restarted reliably over 10 x reboot iterations across three machines.

$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 88.7M 1 loop /snap/core/7396
loop1 7:1 0 54.5M 1 loop
loop2 7:2 0 89M 1 loop /snap/core/7713
loop3 7:3 0 54.6M 1 loop /snap/lxd/11964
loop4 7:4 0 54.6M 1 loop /snap/lxd/11985
vda 252:0 0 20G 0 disk
├─vda1 252:1 0 19.9G 0 part /
├─vda14 252:14 0 4M 0 part
└─vda15 252:15 0 106M 0 part /boot/efi
vdb 252:16 0 40G 0 disk /mnt
vdc 252:32 0 10G 0 disk
└─ceph--683a8389--9788--4fd5--b59e--bdd69936a768-osd--block--683a8389--9788--4fd5--b59e--bdd69936a768
                                                              253:0 0 10G 0 lvm
vdd 252:48 0 10G 0 disk
└─ceph--1fd8022f--e851--4cfa--82aa--64693510c705-osd--block--1fd8022f--e851--4cfa--82aa--64693510c705
                                                              253:6 0 10G 0 lvm
vde 252:64 0 10G 0 disk
└─ceph--302bafc8--9981--47a3--b66b--3d84ab550ba5-osd--block--302bafc8--9981--47a3--b66b--3d84ab550ba5
                                                              253:3 0 10G 0 lvm
vdf 252:80 0 5G 0 disk
├─ceph--db--28e3b53f--1468--4136--914d--6630343a2a67-osd--db--683a8389--9788--4fd5--b59e--bdd69936a768
│ 253:2 0 1G 0 lvm
├─ceph--db--28e3b53f--1468--4136--914d--6630343a2a67-osd--db--302bafc8--9981--47a3--b66b--3d84ab550ba5
│ 253:5 0 1G 0 lvm
└─ceph--db--28e3b53f--1468--4136--914d--6630343a2a67-osd--db--1fd8022f--e851--4cfa--82aa--64693510c705
                                                              253:8 0 1G 0 lvm
vdg 252:96 0 5G 0 disk
├─ceph--wal--40c6b471--3ba2--41d5--9215--eabf391499de-osd--wal--683a8389--9788--4fd5--b59e--bdd69936a768
│ 253:1 0 96M 0 lvm
├─ceph--wal--40c6b471--3ba2--41d5--9215--eabf391499de-osd--wal--302bafc8--9981--47a3--b66b--3d84ab550ba5
│ 253:4 0 96M 0 lvm
└─ceph--wal--40c6b471--3ba2--41d5--9215--eabf391499de-osd--wal--1fd8022f--e851--4cfa--82aa--64693510c705
                                                              253:7 0 96M 0 lvm