Add new methods to openstack_utils

When we use OSM as MANO_COMPONENT, we don't have methods
to retrieve the object instances of ports and VMs. So, we
need these methods to gather details of a :

    - VM using the 'id'
        get_instance(id)

    - port using their 'ip_address'
        get_port_by_ip(ip_address)

Change-Id: Ica45bf49dddb38a3811b049d67c363ac606fde7a
Signed-off-by: Venkata Harshavardhan Reddy Allu <venkataharshavardhan_ven@srmuniv.edu.in>

1 files changed, 17 insertions, 0 deletions

diff --git a/sfc/lib/openstack_utils.py b/sfc/lib/openstack_utils.py
index 59ccdaca..c46ff123 100644
--- a/sfc/lib/openstack_utils.py
+++ b/sfc/lib/openstack_utils.py
@@ -188,6 +188,12 @@ class OpenStackSFC:
 
         return instance, port_list
 
+    def get_instance(self, instance_id):
+        """
+        Return a dictionary of metadata for a server instance
+        """
+        return self.conn.compute.get_server_metadata(instance_id)
+
     def get_av_zones(self):
         '''
         Return the availability zone each host belongs to
@@ -237,6 +243,17 @@ class OpenStackSFC:
 
         raise Exception("There is no VM with name '{}'!!".format(vm_name))
 
+    def get_port_by_ip(self, ip_address):
+        """
+        Return a dictionary of metadata for a port instance
+        by its ip_address
+        """
+
+        ports = self.conn.network.ports()
+        for port in ports:
+            if port.fixed_ips[0]['ip_address'] == ip_address:
+                return self.conn.network.get_port(port.id)
+
     def assign_floating_ip(self, vm, vm_port):
         '''
         Assign floating ips to all the VMs