Support single node CS tests on CentOS 6.4

Change-Id: I005468c86cae2817c6113268946a0a99ddd3111a

.nodeset.yml

@@ -33,4 +33,11 @@ sets:
         options:
                  ip: '10.11.12.3'
                  disk: 10
+  'one-centos-64-x64':
+    nodes:
+      'first':
+        prefab: 'centos-64-x64'
+        options:
+                 ip: '10.11.12.2'
+                 disk: 10
 

README.md

@@ -80,6 +80,8 @@ and tests are in spec/system. It runs virtual machines and requires
 * BUNDLE_PATH=/tmp/vendor bundle exec rake lint
 * BUNDLE_PATH=/tmp/vendor bundle exec rake spec
 * BUNDLE_PATH=/tmp/vendor bundle exec rake spec:system
+* BUNDLE_PATH=/tmp/vendor RS_SET=two-ubuntu-server-12042-x64 bundle exec rake spec:system
+* BUNDLE_PATH=/tmp/vendor RS_SET=two-centos-64-x64 bundle exec rake spec:system
 
 The RELEASES environment variable contains the list of ceph releases
 for which integration tests are going to be run. The default is
@@ -93,7 +95,9 @@ distribution configurations for which integration tests are going
 to be run. Available values are
 
 * two-ubuntu-server-12042-x64
+* one-ubuntu-server-12042-x64
 * two-centos-64-x64
+* one-centos-64-x64
 
 The default is
 
@@ -102,7 +106,9 @@ The default is
   bundle exec rake spec:system
 
 The MACHINES environment variable contains the list of virtual
-machines that are created for integration tests to use. The default is
+machines that are used for integration tests. This needs to match
+with the RS_SET above. I.e. for a two-* RS_SET use 2 machines.
+The default is
 
 * MACHINES='first second' \
   bundle exec rake spec:system

spec/system/ceph_key_spec.rb

@@ -234,7 +234,7 @@ end
 #   MACHINES=first \
 #   RELEASES=cuttlefish \
 #   RS_DESTROY=no \
-#   RS_SET=one-centos-64-x64 \
+#   RS_SET=one-ubuntu-server-12042-x64 \
 #   BUNDLE_PATH=/tmp/vendor \
 #   bundle exec rake spec:system SPEC=spec/system/ceph_key_spec.rb &&
 #   git checkout Gemfile