NSX|V3: New admin utility to show MP cluster managers IPs

Usage:
nsxadmin -r cluster -o show

Output example:
NSX Cluster has 3 manager nodes:
10.192.210.183
10.192.210.184
10.192.210.185

Change-Id: I1a138c759c52e25481fdf34f1ed3d861470adf3e

doc/source/admin_util.rst

@@ -544,6 +544,12 @@ Rate Limit
 
 nsxadmin -r rate-limit -o nsx-update --property value=<>
 
+Cluster
+~~~~~~~
+
+- Show the NSX cluster managers ips:
+
+    nsxadmin -r cluster -o show
 
 Config
 ~~~~~~

vmware_nsx/shell/admin/plugins/common/constants.py

@@ -45,6 +45,7 @@ LB_VIRTUAL_SERVERS = 'lb-virtual-servers'
 LB_POOLS = 'lb-pools'
 LB_MONITORS = 'lb-monitors'
 RATE_LIMIT = 'rate-limit'
+CLUSTER = 'cluster'
 ORPHANED_FIREWALL_SECTIONS = 'orphaned-firewall-sections'
 
 # NSXV only Resource Constants

vmware_nsx/shell/admin/plugins/nsxv3/resources/cluster.py

@@ -0,0 +1,39 @@
+# Copyright 2018 VMware, Inc.  All rights reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from neutron_lib.callbacks import registry
+from oslo_log import log as logging
+
+from vmware_nsx.shell.admin.plugins.common import constants
+from vmware_nsx.shell.admin.plugins.common import utils as admin_utils
+from vmware_nsx.shell.admin.plugins.nsxv3.resources import utils
+from vmware_nsx.shell import resources as shell
+
+LOG = logging.getLogger(__name__)
+
+
+@admin_utils.output_header
+def find_cluster_managers_ips(resource, event, trigger, **kwargs):
+    """Show the current NSX rate limit."""
+
+    nsxlib = utils.get_connected_nsxlib()
+    manager_ips = nsxlib.cluster_nodes.get_managers_ips()
+    LOG.info("NSX Cluster has %s manager nodes:", len(manager_ips))
+    for ip in manager_ips:
+        LOG.info("%s", str(ip))
+
+
+registry.subscribe(find_cluster_managers_ips,
+                   constants.CLUSTER,
+                   shell.Operations.SHOW.value)

vmware_nsx/shell/resources.py

@@ -141,7 +141,9 @@ nsxv3_resources = {
                                     [Operations.LIST.value]),
     constants.RATE_LIMIT: Resource(constants.RATE_LIMIT,
                                    [Operations.SHOW.value,
-                                    Operations.NSX_UPDATE.value])
+                                    Operations.NSX_UPDATE.value]),
+    constants.CLUSTER: Resource(constants.CLUSTER,
+                                [Operations.SHOW.value])
 }
 
 # Add supported NSX-V resources in this dictionary