Allow saving the cib to a file

pcs/cluster.py

@@ -60,7 +60,7 @@ def cluster_cmd(argv):
         else:
             disable_cluster(argv)
     elif (sub_cmd == "cib"):
-        get_cib()
+        get_cib(argv)
     elif (sub_cmd == "push"):
         cluster_push(argv)
     elif (sub_cmd == "node"):
@@ -314,8 +314,18 @@ def cluster_push(argv):
     else:
         print "CIB updated"
 
-def get_cib():
-    print utils.get_cib(),
+def get_cib(argv):
+    if len(argv) == 0:
+        print utils.get_cib(),
+    else:
+        filename = argv[0]
+        f = open(filename, 'w')
+        output = utils.get_cib()
+        if output != "":
+            f.write(utils.get_cib())
+        else:
+            print "Error: No data in the CIB"
+            sys.exit(1)
 
 def cluster_node(argv):
     if len(argv) != 2:

pcs/usage.py

@@ -184,8 +184,10 @@ def cluster():
         --local will only perform changes on the local node
         --start will also start the cluster on the specified nodes
 
-    cib
-        Get the raw xml from the CIB (Cluster Information Base)
+    cib [filename]
+        Get the raw xml from the CIB (Cluster Information Base).  If a
+        filename is provided, we save the cib to that file, otherwise the cib
+        is printed
 
     push cib <filename>
         Push the raw xml from <filename> to the CIB (Cluster Information Base)