[Cinder] Updates for external ceph backend

Example override yaml file is added to indicate how to
override the manifest for configure an additional externally
managed Ceph Cinder backend.

In ceph.conf, either "mon_host" or "mon host" can be used for
the same parameter. In order not to force the user to use it one
way or the other, "mon_host" is removed from default setting.

Change-Id: I179567d77196ab2fb82d7a78e3a08efb966ed68c

cinder/Chart.yaml

@@ -14,7 +14,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Cinder
 name: cinder
-version: 0.1.2
+version: 0.1.3
 home: https://docs.openstack.org/cinder/latest/
 icon: https://www.openstack.org/themes/openstack/images/project-mascots/Cinder/OpenStack_Project_Cinder_vertical.png
 sources:

cinder/values.yaml

@@ -390,8 +390,7 @@ ceph_client:
     rbd_user: null
     rbd_user_keyring: null
     conf:
-      global:
-        mon_host: null
+      global: null
       osd: null
 conf:
   paste:
@@ -1082,8 +1081,7 @@ backup:
     enabled: false
     admin_keyring: null
     conf:
-      global:
-        mon_host: null
+      global: null
       osd: null
   posix:
     volume:

cinder/values_overrides/external-ceph-backend.yaml

@@ -0,0 +1,56 @@
+# Note: This yaml file serves as an example for overriding the manifest
+# to enable additional externally managed Ceph Cinder backend.
+# libvirt/values_overrides/cinder-external-ceph-backend.yaml in repo
+# openstack-helm-infra is also needed for the attachment of ceph volumes.
+---
+ceph_client:
+  enable_external_ceph_backend: True
+  external_ceph:
+    rbd_user: cinder2
+    rbd_user_keyring: RBDUserKeyRing
+    conf:
+      global:
+        auth client required: none
+        auth cluster required: none
+        auth service required: none
+        cluster network: 172.31.0.128/25
+        fsid: 538fe375-1ee2-4719-a89e-1ff2cd851a1f
+        log_to_syslog: False
+        mon_host: "[v2:172.31.0.187:3300,v1:172.31.0.187:6789],[v2:172.31.0.188:3300,v1:172.31.0.188:6789],[v2:172.31.0.189:3300,v1:172.31.0.189:6789]"
+        mon initial members: "host1,host2,host3"
+        mon_allow_pool_delete: True
+        mon_compact_on_trim: False
+        mutex_perf_counter: False
+        osd pool default crush rule: -1
+        public network: 172.31.0.128/25
+      osd:
+        ms_dispatch_throttle_bytes: 1048576000
+        objecter_inflight_op_bytes: 1048576000
+        objecter_inflight_ops: 102400
+        osd memory target: 17599882854
+        osd_max_pg_log_entries: 10
+        osd_min_pg_log_entries: 10
+        osd_pg_log_dups_tracked: 10
+        osd_pg_log_trim_min: 10
+
+conf:
+  cinder:
+    DEFAULT:
+      enabled_backends: "rbd1,rbd2"
+  backends:
+    rbd2:
+      volume_driver: cinder.volume.drivers.rbd.RBDDriver
+      volume_backend_name: rbd2
+      rbd_pool: cinder2.volumes
+      rbd_ceph_conf: "/etc/ceph/external-ceph.conf"
+      rbd_flatten_volume_from_snapshot: False
+      report_discard_supported: True
+      rbd_max_clone_depth: 5
+      rbd_store_chunk_size: 4
+      rados_connect_timeout: -1
+      rbd_user: cinder2
+      rbd_secret_uuid: 3f0133e4-8384-4743-9473-fecacc095c74
+      image_volume_cache_enabled: True
+      image_volume_cache_max_size_gb: 200
+      image_volume_cache_max_count: 50
+...