Gather neutron info for VM connectivity problems

dump-vm-neutron-info.py

"""
Script to gather neutron info for vm connectivity problems.
Gets the vm's ports, networks, subnets, security groups
and router, external networks and floatingips.

source .openrc admin
python dump-vm-neutrn-info.py VM_ID
"""
import sys
import os_client_config
from pprint import pprint


if len(sys.argv) != 2:
    print("Usage: %s VM_ID" %argv[0])
    sys.exit()
vm_id = sys.argv[1]

nc = os_client_config.make_client('network', cloud='envvars')

ports = nc.list_ports(device_id=vm_id)
if len(ports['ports']) == 0:
    print("Can't find port(s) for vm with id: %s" %vm_id)
    sys.exit()

pprint(ports)
for port in ports['ports']:
    net_id = port['network_id']
    pprint(nc.list_networks(id=net_id))
    pprint(nc.list_subnets(network_id=net_id))

    for sg_id in port['security_groups']:
        #pprint(nc.list_security_groups(id=sg_id)) 
        pprint(nc.list_security_group_rules(security_group_id=sg_id)) 

    snat_ports = nc.list_ports(device_owner="network:router_centralized_snat",
                               network_id=net_id)
    if len(snat_ports['ports']) > 0:
        router_id = snat_ports['ports'][0]['device_id']
        routers = nc.list_routers(id=router_id)
        pprint(routers)
        if len(routers['routers']) > 0:
            ext_info = routers['routers'][0]['external_gateway_info']
            if ext_info:
                ext_net_id = ext_info['network_id']
                ext_nets = nc.list_networks(id=ext_net_id)
                pprint(ext_nets)
                pprint(nc.list_subnets(network_id=ext_net_id))

    pprint(nc.list_floatingips(port_id=port['id']))