Add ceph configuration for cinder-backup

This PS allows the cinder-backup to use a separate ceph backend, you
can add a ceph ip and admin keyring to .Values.backup_ceph so that
cinder-backup can use the new ceph.

blueprint add-ceph-configuration-for-cinder-backup

Change-Id: Ib2c4ca3945a15107d77e36635bda52297de9f164

cinder/templates/bin/_external-ceph-rbd-admin-keyring.sh.tpl

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+{{/*
+Copyright 2017 The Openstack-Helm Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/}}
+
+set -ex
+{{- if .Values.backup.external_ceph_rbd.admin_keyring }}
+cat <<EOF > /etc/ceph/ceph.client.admin.keyring
+[client.admin]
+    key = {{ .Values.backup.external_ceph_rbd.admin_keyring }}
+EOF
+{{- else }}
+echo "ERROR: You must define the ceph admin keyring in values.yaml to use external_ceph_rbd."
+exit 1
+{{- end }}
+
+exit 0

cinder/templates/configmap-bin.yaml

@@ -68,3 +68,7 @@ data:
   rabbit-init.sh: |
 {{- include "helm-toolkit.scripts.rabbit_init" . | indent 4 }}
 {{- end }}
+{{- if .Values.backup.external_ceph_rbd.enabled }}
+  external-ceph-rbd-admin-keyring.sh: |
+{{ tuple "bin/_external-ceph-rbd-admin-keyring.sh.tpl" . | include "helm-toolkit.utils.template" | indent 4 }}
+{{- end }}

cinder/templates/configmap-etc.yaml

@@ -133,4 +133,8 @@ data:
   {{ printf "%s.filters" $filePrefix }}: |
 {{ $value.content | indent 4 }}
 {{- end }}
+{{- if .Values.backup.external_ceph_rbd.enabled }}
+  external-backup-ceph.conf: |
+{{ include "helm-toolkit.utils.to_ini" .Values.backup.external_ceph_rbd.conf | indent 4 }}
+{{- end }}
 {{- end }}

cinder/templates/deployment-backup.yaml

@@ -149,10 +149,17 @@ spec:
             {{ if or (eq .Values.conf.cinder.DEFAULT.backup_driver "cinder.backup.drivers.ceph") (include "cinder.utils.is_ceph_volume_configured" $envAll) }}
             - name: etcceph
               mountPath: /etc/ceph
+            {{- if not .Values.backup.external_ceph_rbd.enabled }}
             - name: ceph-etc
               mountPath: /etc/ceph/ceph.conf
               subPath: ceph.conf
               readOnly: true
+            {{- else }}
+            - name: cinder-etc
+              mountPath: /etc/ceph/ceph.conf
+              subPath: external-backup-ceph.conf
+              readOnly: true
+            {{- end }}
             - name: ceph-keyring
               mountPath: /tmp/client-keyring
               subPath: key

cinder/templates/job-backup-storage-init.yaml

@@ -74,10 +74,17 @@ spec:
           volumeMounts:
             - name: etcceph
               mountPath: /etc/ceph
+            {{- if not .Values.backup.external_ceph_rbd.enabled }}
             - name: cinder-bin
               mountPath: /tmp/ceph-admin-keyring.sh
               subPath: ceph-admin-keyring.sh
               readOnly: true
+           {{- else }}
+            - name: cinder-bin
+              mountPath: /tmp/ceph-admin-keyring.sh
+              subPath: external-ceph-rbd-admin-keyring.sh
+              readOnly: true
+            {{ end }}
             {{- if empty .Values.conf.ceph.admin_keyring }}
             - name: ceph-keyring
               mountPath: /tmp/client-keyring
@@ -120,10 +127,17 @@ spec:
             {{- if eq .Values.conf.cinder.DEFAULT.backup_driver "cinder.backup.drivers.ceph" }}
             - name: etcceph
               mountPath: /etc/ceph
+            {{- if not .Values.backup.external_ceph_rbd.enabled }}
             - name: ceph-etc
               mountPath: /etc/ceph/ceph.conf
               subPath: ceph.conf
               readOnly: true
+            {{- else }}
+            - name: cinder-etc
+              mountPath: /etc/ceph/ceph.conf
+              subPath: external-backup-ceph.conf
+              readOnly: true
+            {{- end }}
             {{- if empty .Values.conf.ceph.admin_keyring }}
             - name: ceph-keyring
               mountPath: /tmp/client-keyring
@@ -143,6 +157,12 @@ spec:
           configMap:
             name: ceph-etc
             defaultMode: 0444
+        {{- if .Values.backup.external_ceph_rbd.enabled }}
+        - name: cinder-etc
+          configMap:
+            name: cinder-etc
+            defaultMode: 0444
+        {{- end }}
         {{- if empty .Values.conf.ceph.admin_keyring }}
         - name: ceph-keyring
           secret:

cinder/values.yaml

@@ -863,6 +863,13 @@ conf:
               max: 0
 
 backup:
+  external_ceph_rbd:
+    enabled: false
+    admin_keyring: null
+    conf:
+      global:
+        mon_host: null
+      osd:
   posix:
     volume:
       class_name: general