I don't use ansible anymore. But this was my config for the host onode1:
./host_vars/onode2.yml:
lvm_volumes:
- data: /dev/sdb
db: '1'
db_vg: host-2-db
- data: /dev/sdc
db: '2'
db_vg: host-2-db
- data: /dev/sde
db: '3'
db_vg: host-2-db
- data: /dev/sdf
db: '4'
db_vg: host-2-db
…
one config file per host. The LVs were created by hand on a PV over RAID1 over two SSDs.
The hosts had empty slots for hdds to be bought later. So I had to "partition" the PV by hand, because ansible uses the whole RAID1 only for the present HDDs.
It is said that only certain sizes of DB & WAL partitions are sensible.
I now use 58GiB LVs.
The remaining space in the RAID1 is used for a faster OSD.
Lars
Wed, 30 Oct 2019 10:02:23 +0000
CUZA Frédéric <frederic.cuza@xxxxxx> ==> "ceph-users@xxxxxxxxxxxxxx" <ceph-users@xxxxxxxxxxxxxx> :
> Hi Everyone,
>
> Does anyone know how to indicate block-db and block-wal to device on ansible ?
> In ceph-deploy it is quite easy :
> ceph-deploy osd create osd_host08 --data /dev/sdl --block-db /dev/sdm12 --block-wal /dev/sdn12 -bluestore
>
> On my data nodes I have 12 HDDs and 2 SSDs I use those SSDs for block-db and block-wal.
> How to indicate for each osd which partition to use ?
>
> And finally, how do you handle the deployment if you have multiple data nodes setup ?
> SSDs on sdm and sdn on one host and SSDs on sda and sdb on another ?
>
> Thank you for your help.
>
> Regards,
--
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