ceph: run 2 mds replicas

take replica count from values, default to 2; ideally we want 2 mds
replicas, 1 active and 1 standby

Change-Id: Ifd9e717ad0371e52ce26e0da3393f5f634495f58

ceph-client/templates/deployment-mds.yaml

@@ -26,7 +26,7 @@ apiVersion: apps/v1beta1
 metadata:
   name: ceph-mds
 spec:
-  replicas: 1
+  replicas: {{ .Values.pod.replicas.mds }}
   template:
     metadata:
       name: ceph-mds

ceph-client/values.yaml

@@ -61,6 +61,7 @@ pod:
     rbd_provisioner: 2
     cephfs_provisioner: 2
     mgr: 2
+    mds: 2
   affinity:
     anti:
       type:

tools/deployment/developer/ceph/040-ceph.sh

@@ -159,6 +159,7 @@ conf:
 pod:
   replicas:
     mgr: 1
+    mds: 1
 EOF
 
 for CHART in ceph-mon ceph-osd ceph-client; do