diff --git a/monasca_setup/main.py b/monasca_setup/main.py
index a0216bcf..9e148db3 100644
--- a/monasca_setup/main.py
+++ b/monasca_setup/main.py
@@ -48,29 +48,38 @@ def write_template(template_path, out_path, variables, group, is_yaml=False):
 
 
 def main(argv=None):
-    parser = argparse.ArgumentParser(description='Detect running daemons then configure and start the agent.',
+    parser = argparse.ArgumentParser(description='Configure and setup the agent. In a full run it will detect running' +
+                                                 ' daemons then configure and start the agent.',
                                      formatter_class=argparse.ArgumentDefaultsHelpFormatter)
     parser.add_argument(
-        '-u', '--username', help="Username used for keystone authentication", required=True)
+        '-u', '--username', help="Username used for keystone authentication. Required for basic configuration.")
     parser.add_argument(
-        '-p', '--password', help="Password used for keystone authentication", required=True)
-    parser.add_argument('--keystone_url', help="Keystone url", required=True)
-    parser.add_argument('--monasca_url', help="Monasca API url, if not defined the url is pulled from keystone", required=False, default='')
-    parser.add_argument('--insecure', help="Set whether certificates are used for Keystone authentication", required=False, default=False)
-    parser.add_argument('--project_name', help="Project name for keystone authentication", required=False, default='')
-    parser.add_argument('--project_domain_id', help="Project domain id for keystone authentication", required=False, default='')
-    parser.add_argument('--project_domain_name', help="Project domain name for keystone authentication", required=False, default='')
-    parser.add_argument('--project_id', help="Keystone project id  for keystone authentication", required=False, default='')
-    parser.add_argument('--ca_file', help="Sets the path to the ca certs file if using certificates. " +
-                                          "Required only if insecure is set to False", required=False, default='')
+        '-p', '--password', help="Password used for keystone authentication. Required for basic configuration.")
+    parser.add_argument('--keystone_url', help="Keystone url. Required for basic configuration.")
+    parser.add_argument('--project_name', help="Project name for keystone authentication", default='')
+    parser.add_argument('--project_domain_id', help="Project domain id for keystone authentication", default='')
+    parser.add_argument('--project_domain_name', help="Project domain name for keystone authentication", default='')
+    parser.add_argument('--project_id', help="Keystone project id  for keystone authentication", default='')
+    parser.add_argument('--monasca_url', help="Monasca API url, if not defined the url is pulled from keystone",
+                        default='')
+    parser.add_argument('--system_only', help="Setup the service but only configure the base config and system " +
+                                              "metrics (cpu, disk, load, memory, network).",
+                        action="store_true", default=False)
+    parser.add_argument('-d', '--detection_plugins', nargs='*',
+                        help="Skip base config and service setup and only configure the this space separated list. " +
+                             "This assumes the base config has already run.")
     parser.add_argument('--check_frequency', help="How often to run metric collection in seconds", type=int, default=60)
-    parser.add_argument('--config_dir', help="Configuration directory", default='/etc/monasca/agent')
     parser.add_argument('--dimensions', help="Additional dimensions to set for all metrics. A comma seperated list " +
                                              "of name/value pairs, 'name:value,name2:value2'")
+    parser.add_argument('--ca_file', help="Sets the path to the ca certs file if using certificates. " +
+                                          "Required only if insecure is set to False", default='')
+    parser.add_argument('--insecure', help="Set whether certificates are used for Keystone authentication",
+                        default=False)
+    parser.add_argument('--config_dir', help="Configuration directory", default='/etc/monasca/agent')
     parser.add_argument('--log_dir', help="monasca-agent log directory", default='/var/log/monasca/agent')
-    parser.add_argument('--log_level', help="monasca-agent logging level (ERROR, WARNING, INFO, DEBUG)", required=False, default='INFO')
-    parser.add_argument(
-        '--template_dir', help="Alternative template directory", default=os.path.join(PREFIX_DIR, 'share/monasca/agent'))
+    parser.add_argument('--log_level', help="monasca-agent logging level (ERROR, WARNING, INFO, DEBUG)", default='INFO')
+    parser.add_argument('--template_dir',
+                        help="Alternative template directory", default=os.path.join(PREFIX_DIR, 'share/monasca/agent'))
     parser.add_argument('--headless', help="Run in a non-interactive mode", action="store_true")
     parser.add_argument('--overwrite',
                         help="Overwrite existing plugin configuration. " +
@@ -81,12 +90,9 @@ def main(argv=None):
                         action="store_true")
     parser.add_argument('--user', help="User name to run monasca-agent as", default='monasca-agent')
     parser.add_argument('-s', '--service', help="Service this node is associated with, added as a dimension.")
-    parser.add_argument('--system_only',
-                        help="If set only system metrics (cpu, disk, load, memory, network) will be configured.",
-                        action="store_true", default=False)
     parser.add_argument('--amplifier', help="Integer for the number of additional measurements to create. " +
                                             "Additional measurements contain the 'amplifier' dimension. " +
-                                            "Useful for load testing; not for production use.", default=0, required=False)
+                                            "Useful for load testing; not for production use.", default=0)
     parser.add_argument('-v', '--verbose', help="Verbose Output", action="store_true")
     args = parser.parse_args()
 
@@ -97,39 +103,58 @@ def main(argv=None):
 
     # Detect and if possibly enable the agent service
     agent_service = detect_init(PREFIX_DIR, args.config_dir, args.log_dir, args.template_dir, username=args.user)
-    if not args.skip_enable:
-        agent_service.enable()
-
     gid = pwd.getpwnam(args.user).pw_gid
-    # Write the main agent.yaml - Note this is always overwritten
-    log.info('Configuring base Agent settings.')
-    dimensions = {}
-    # Join service in with the dimensions
-    if args.service:
-        dimensions.update({'service': args.service})
-    if args.dimensions:
-        dimensions.update(dict(item.strip().split(":") for item in args.dimensions.split(",")))
 
-    args.dimensions = dict((name, value) for (name, value) in dimensions.iteritems())
-    write_template(os.path.join(args.template_dir, 'agent.yaml.template'),
-                   os.path.join(args.config_dir, 'agent.yaml'),
-                   {'args': args, 'hostname': socket.getfqdn()},
-                   gid,
-                   is_yaml=True)
+    if args.detection_plugins is None:  # Skip base setup if running specific detection plugins
+        # Verify required options
+        if args.username is None or args.password is None or args.keystone_url is None:
+            log.error('Username, password and keystone_url are required when running full configuration.')
+            parser.print_help()
+            sys.exit(1)
+        if not args.skip_enable:
+            agent_service.enable()
 
-    # Write the supervisor.conf
-    write_template(os.path.join(args.template_dir, 'supervisor.conf.template'),
-                   os.path.join(args.config_dir, 'supervisor.conf'),
-                   {'prefix': PREFIX_DIR, 'log_dir': args.log_dir},
-                   gid)
+        # Write the main agent.yaml - Note this is always overwritten
+        log.info('Configuring base Agent settings.')
+        dimensions = {}
+        # Join service in with the dimensions
+        if args.service:
+            dimensions.update({'service': args.service})
+        if args.dimensions:
+            dimensions.update(dict(item.strip().split(":") for item in args.dimensions.split(",")))
+
+        args.dimensions = dict((name, value) for (name, value) in dimensions.iteritems())
+        write_template(os.path.join(args.template_dir, 'agent.yaml.template'),
+                       os.path.join(args.config_dir, 'agent.yaml'),
+                       {'args': args, 'hostname': socket.getfqdn()},
+                       gid,
+                       is_yaml=True)
+
+        # Write the supervisor.conf
+        write_template(os.path.join(args.template_dir, 'supervisor.conf.template'),
+                       os.path.join(args.config_dir, 'supervisor.conf'),
+                       {'prefix': PREFIX_DIR, 'log_dir': args.log_dir},
+                       gid)
 
     # Run through detection and config building for the plugins
     plugin_config = agent_config.Plugins()
     if args.system_only:
         from detection.plugins.system import System
         plugins = [System]
+    elif args.detection_plugins is not None:
+        lower_plugins = [p.lower() for p in args.detection_plugins]
+        plugins = []
+        for plugin in DETECTION_PLUGINS:
+            if plugin.__name__.lower() in lower_plugins:
+                plugins.append(plugin)
+
+        if len(plugins) != len(args.detection_plugins):
+            plugin_names = [p.__name__ for p in DETECTION_PLUGINS]
+            log.warn("Not all plugins found, discovered plugins {0}\nAvailable plugins{1}".format(plugins,
+                                                                                                  plugin_names))
     else:
         plugins = DETECTION_PLUGINS
+
     for detect_class in plugins:
         detect = detect_class(args.template_dir, args.overwrite)
         if detect.available:
@@ -142,7 +167,6 @@ def main(argv=None):
     # Write out the plugin config
     for key, value in plugin_config.iteritems():
         # todo if overwrite is set I should either warn or just delete any config files not in the new config
-        # todo add the ability to show a diff before overwriting or merging config
         config_path = os.path.join(args.config_dir, 'conf.d', key + '.yaml')
         # merge old and new config, new has precedence
         if (not args.overwrite) and os.path.exists(config_path):
@@ -152,7 +176,7 @@ def main(argv=None):
                 agent_config.deep_merge(old_config, value)
                 value = old_config
         with open(config_path, 'w') as config_file:
-            os.chmod(config_path, 0o640)
+            os.chmod(config_path, 0640)
             os.chown(config_path, 0, gid)
             config_file.write(yaml.safe_dump(value,
                                              encoding='utf-8',