Merge pull request #2096 from andymcc/regex_defaults

Add regexp check for setting CLUSTER_NAME

roles/ceph-common/tasks/configure_cluster_name.yml

@@ -5,6 +5,7 @@
     insertafter: EOF
     create: yes
     line: "CLUSTER={{ cluster }}"
+    regexp: "^CLUSTER="
   when:
     - ansible_os_family == "RedHat"
 
@@ -32,6 +33,7 @@
     dest: /etc/default/ceph
     insertafter: EOF
     create: yes
+    regexp: "^CLUSTER="
     line: "CLUSTER={{ cluster }}"
   when:
     - ansible_os_family == "Debian"
@@ -43,6 +45,7 @@
     dest: /etc/default/ceph/ceph
     insertafter: EOF
     create: yes
+    regexp: "^CLUSTER="
     line: "CLUSTER={{ cluster }}"
   when:
     - ansible_os_family == "Debian"