osd: add wal_devices option support to ceph_volume module

This commit adds the `wal_devices` option support to the
ceph_volume module.
passing a devices list in `bluestore_wal_devices` will make ceph-volume
creating 1 vg using these devices to create block.wal partitions.

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>

group_vars/osds.yml.sample

@@ -44,11 +44,19 @@ dummy:
 # Declare devices to be used as block.db devices
 
 #dedicated_devices:
-#  - /dev/sda
-#  - /dev/sdb
+#  - /dev/sdx
+#  - /dev/sdy
 
 #dedicated_devices: []
 
+# Declare devices to be used as block.wal devices
+
+#bluestore_wal_devices:
+#  - /dev/nvme0n1
+#  - /dev/nvme0n2
+
+#bluestore_wal_devices: []
+
 #'osd_auto_discovery'  mode prevents you from filling out the 'devices' variable above.
 # Device discovery is based on the Ansible fact 'ansible_devices'
 # which reports all the devices on a system. If chosen, all the disks

library/ceph_volume.py

@@ -280,6 +280,7 @@ def batch(module, container_image):
     journal_size = module.params.get('journal_size', None)
     block_db_size = module.params.get('block_db_size', None)
     block_db_devices = module.params.get('block_db_devices', None)
+    wal_devices = module.params.get('wal_devices', None)
     dmcrypt = module.params.get('dmcrypt', None)
     osds_per_device = module.params.get('osds_per_device', 1)
 
@@ -321,6 +322,9 @@ def batch(module, container_image):
     if block_db_devices:
         cmd.extend(['--db-devices', ' '.join(block_db_devices)])
 
+    if wal_devices:
+        cmd.extend(['--wal-devices', ' '.join(wal_devices)])
+
     return cmd
 
 
@@ -508,6 +512,7 @@ def run_module():
         journal_size=dict(type='str', required=False, default='5120'),
         block_db_size=dict(type='str', required=False, default='-1'),
         block_db_devices=dict(type='list', required=False, default=[]),
+        wal_devices=dict(type='list', required=False, default=[]),
         report=dict(type='bool', required=False, default=False),
         containerized=dict(type='str', required=False, default=False),
         osd_fsid=dict(type='str', required=False),

roles/ceph-osd/defaults/main.yml

@@ -36,11 +36,19 @@ devices: []
 # Declare devices to be used as block.db devices
 
 #dedicated_devices:
-#  - /dev/sda
-#  - /dev/sdb
+#  - /dev/sdx
+#  - /dev/sdy
 
 dedicated_devices: []
 
+# Declare devices to be used as block.wal devices
+
+#bluestore_wal_devices:
+#  - /dev/nvme0n1
+#  - /dev/nvme0n2
+
+bluestore_wal_devices: []
+
 #'osd_auto_discovery'  mode prevents you from filling out the 'devices' variable above.
 # Device discovery is based on the Ansible fact 'ansible_devices'
 # which reports all the devices on a system. If chosen, all the disks

roles/ceph-osd/tasks/scenarios/lvm-batch.yml

@@ -11,6 +11,7 @@
     journal_size: "{{ journal_size }}"
     block_db_size: "{{ block_db_size }}"
     block_db_devices: "{{ dedicated_devices | unique if dedicated_devices | length > 0 else omit }}"
+    wal_devices: "{{ bluestore_wal_devices | unique if bluestore_wal_devices | length > 0 else omit }}"
     action: "batch"
   environment:
     CEPH_VOLUME_DEBUG: 1