[CEPH] Setup a cronjob to run OSD defrags for FileStore

Create a cron and associated script to run monthly OSD defrags.
When the script runs it will switch the OSD disk to the CFQ I/O
scheduler to ensure that this is a non-blocking operation for ceph.
While this cron job will run monthly, it will only execute on OSDs
that are HDD based with Filestore.

Change-Id: I06a4679e0cbb3e065974d610606d232cde77e0b2

ceph-osd/values.yaml

@@ -76,10 +76,25 @@ secrets:
   keyrings:
     osd: ceph-bootstrap-osd-keyring
     admin: ceph-client-admin-keyring
+
 network:
   public: 192.168.0.0/16
   cluster: 192.168.0.0/16
 
+jobs:
+  ceph_defragosds:
+    # Execute the 1st of each month
+    cron: "0 0 1 * *"
+    history:
+      # Number of successful job to keep
+      successJob: 1
+      # Number of failed job to keep
+      failJob: 1
+    concurrency:
+      # Skip new job if previous job still active
+      execPolicy: Forbid
+    startingDeadlineSecs: 60
+
 conf:
   ceph:
     global:
@@ -250,3 +265,4 @@ manifests:
   daemonset_osd: true
   job_image_repo_sync: true
   helm_tests: true
+  cronjob_defragosds: true