ceph osd's journal soft link need to be created

[ByungYeol Woo]

I deployed openstack pike with 3 ceph nodes by kolla-ansible.

I used sdb as external journal disk, and sdc~sde as data disk.
After deployed, when I generated IO load, I think journal works well by iostat results.

When I issued 'ceph-disk list' in kolla-ansible deployed openstack, I could not find journal informations of data disks. But I cound found journal informations of data disks in manually deployed openstack/ceph.

I think some steps need to be added in ceph role, like adding link of osd journal disk.

Please see following informations:

=============================================
====== disk configuration
=============================================
[root@kolla ]# grep ceph /etc/kolla/globals.yml | grep -v ^#
enable_ceph: "yes"
enable_ceph_rgw: "yes"
ceph_pool_type: "replicated"
enable_ceph_rgw_keystone: "yes"
ceph_pool_pg_num: 128
ceph_pool_pgp_num: 128
glance_backend_ceph: "yes"
cinder_backend_ceph: "{{ enable_ceph }}"
cinder_backup_driver: "ceph"
nova_backend_ceph: "{{ enable_ceph }}"

[root@storage01 ~]# parted /dev/sdb -s -- mklabel gpt mkpart KOLLA_CEPH_OSD_BOOTSTRAP_sdc_J 1 50G \
mkpart KOLLA_CEPH_OSD_BOOTSTRAP_sdd_J 50G 100G \
mkpart KOLLA_CEPH_OSD_BOOTSTRAP_sde_J 100G 150G
[root@storage01 ~]# parted /dev/sdc -s -- mklabel gpt mkpart KOLLA_CEPH_OSD_BOOTSTRAP_sdc 1 -1
[root@storage01 ~]# parted /dev/sdd -s -- mklabel gpt mkpart KOLLA_CEPH_OSD_BOOTSTRAP_sdd 1 -1
[root@storage01 ~]# parted /dev/sde -s -- mklabel gpt mkpart KOLLA_CEPH_OSD_BOOTSTRAP_sde 1 -1

=============================================
====== After deployed
=============================================
[root@storage01 ~]# docker exec -it ceph_osd_6 ceph-disk list
/dev/dm-0 other, xfs, mounted on /usr/share/zoneinfo/UTC
/dev/dm-1 swap, swap
/dev/dm-10 other, xfs
/dev/dm-2 other, xfs
/dev/dm-3 other, xfs
/dev/dm-4 other, xfs
/dev/dm-5 other, xfs
/dev/dm-6 other, xfs
/dev/dm-7 other, xfs
/dev/dm-8 other, xfs, mounted on /
/dev/dm-9 other, xfs
/dev/loop0 other, xfs
/dev/loop1 other, unknown
/dev/sda :
 /dev/sda1 other, xfs
 /dev/sda2 other, LVM2_member
/dev/sdb :
 /dev/sdb1 ceph journal
 /dev/sdb2 ceph journal
 /dev/sdb3 ceph journal
/dev/sdc :
 /dev/sdc1 ceph data, prepared, cluster ceph, osd.0
/dev/sdd :
 /dev/sdd1 ceph data, prepared, cluster ceph, osd.3
/dev/sde :
 /dev/sde1 ceph data, active, cluster ceph, osd.6

=============================================
====== Another openstack without kolla-ansible
=============================================
[root@ceph01 ]# ceph-disk list
/dev/dm-0 other, ext4, mounted on /
/dev/dm-1 swap, swap
/dev/loop0 other, unknown
/dev/loop1 other, unknown
/dev/loop2 other, unknown
/dev/loop3 other, unknown
/dev/loop4 other, unknown
/dev/loop5 other, unknown
/dev/loop6 other, unknown
/dev/loop7 other, unknown
/dev/sda :
 /dev/sda1 other, ext2, mounted on /boot
 /dev/sda2 other, 0x5
 /dev/sda5 other, LVM2_member
/dev/sdb :
 /dev/sdb1 ceph journal, for /dev/sdc1
 /dev/sdb2 ceph journal, for /dev/sdd1
 /dev/sdb3 ceph journal, for /dev/sde1
 /dev/sdb4 ceph journal, for /dev/sdf1
 /dev/sdb5 ceph journal, for /dev/sdg1
 /dev/sdb6 ceph journal, for /dev/sdh1
 /dev/sdb7 ceph journal, for /dev/sdi1
 /dev/sdb8 ceph journal, for /dev/sdj1
/dev/sdc :
 /dev/sdc1 ceph data, active, cluster ceph, osd.0, journal /dev/sdb1
/dev/sdd :
 /dev/sdd1 ceph data, active, cluster ceph, osd.17, journal /dev/sdb2
/dev/sde :
 /dev/sde1 ceph data, active, cluster ceph, osd.18, journal /dev/sdb3
/dev/sdf :
 /dev/sdf1 ceph data, active, cluster ceph, osd.19, journal /dev/sdb4
/dev/sdg :
 /dev/sdg1 ceph data, active, cluster ceph, osd.20, journal /dev/sdb5
/dev/sdh :
 /dev/sdh1 ceph data, active, cluster ceph, osd.21, journal /dev/sdb6
/dev/sdi :
 /dev/sdi1 ceph data, active, cluster ceph, osd.22, journal /dev/sdb7
/dev/sdj :
 /dev/sdj1 ceph data, active, cluster ceph, osd.23, journal /dev/sdb8