[ceph-client] Add pool delete support for Ceph pools

Two new values, "delete" and "delete_all_pool_data," have been
added to the Ceph pool spec to allow existing pools to be deleted
in a brownfield deployment. For deployments where a pool does not
exist, either for greenfield or because it has been deleted
previously, the pool will be created and then deleted in a single
step.

Change-Id: Ic22acf02ae2e02e03b834e187d8a6a1fa58249e7

ceph-client/Chart.yaml

@@ -15,6 +15,6 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Ceph Client
 name: ceph-client
-version: 0.1.17
+version: 0.1.18
 home: https://github.com/ceph/ceph-client
 ...

ceph-client/templates/bin/pool/_init.sh.tpl

@@ -345,6 +345,17 @@ manage_pool {{ .application }} ${pool_name} {{ .replication }} {{ .percent_total
 if [[ -n "$(ceph --cluster ${CLUSTER} osd pool ls | grep ^{{ .name }}$)" ]] &&
    [[ -z "$(ceph --cluster ${CLUSTER} osd pool ls | grep ^{{ .rename }}$)" ]]; then
   ceph --cluster "${CLUSTER}" osd pool rename "{{ .name }}" "{{ .rename }}"
+  pool_name="{{ .rename }}"
+fi
+{{- end }}
+{{- if and .delete .delete_all_pool_data }}
+# If delete is set to true and delete_all_pool_data is also true, delete the pool
+if [[ "true" == "{{ .delete }}" ]] &&
+   [[ "true" == "{{ .delete_all_pool_data }}" ]]; then
+  ceph --cluster "${CLUSTER}" tell mon.* injectargs '--mon-allow-pool-delete=true'
+  ceph --cluster "${CLUSTER}" osd pool set "${pool_name}" nodelete false
+  ceph --cluster "${CLUSTER}" osd pool delete "${pool_name}" "${pool_name}" --yes-i-really-really-mean-it
+  ceph --cluster "${CLUSTER}" tell mon.* injectargs '--mon-allow-pool-delete=false'
 fi
 {{- end }}
 {{- end }}

ceph-client/values.yaml

@@ -354,6 +354,13 @@ conf:
         # renamed, the name will not be changed. If two pools exist with the two names, the
         # pool matching the renamed value will be configured and the other left alone.
         # rename: rbd-new
+        # Optional "delete" and "delete_all_pool_data" values may be used to delete an
+        # existing pool. Both must exist and must be set to true in order to delete a pool.
+        # NOTE: Deleting a pool deletes all of its data and is unrecoverable. This is why
+        #       both values are required in order to delete a pool. Neither value does
+        #       anything by itself.
+        # delete: false
+        # delete_all_pool_data: false
         application: rbd
         replication: 3
         percent_total_data: 40

releasenotes/notes/ceph-client.yaml

@@ -18,4 +18,5 @@ ceph-client:
   - 0.1.15 Make ceph-client helm test more PG specific
   - 0.1.16 Make Ceph pool init job consistent with helm test
   - 0.1.17 Add pool rename support for Ceph pools
+  - 0.1.18 Add pool delete support for Ceph pools
 ...