[kvm/setup] Add script to setup VS management network

[daall]

Signed-off-by: Danny Allen [email protected]

Description of PR

Summary:
Fixes # (issue)

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• Test case(new/improvement)

Approach

What is the motivation for this PR?

I got tired of setting up the management network whenever I rebooted my dev VM so I added a script to do it in one step. :P

How did you do it?

Put the steps from the README into a script and added some validation checks.

How did you verify/test it?

daall@sahale ~/repo/sonic-mgmt/ansible % ./setup-management-network.sh 
Root privilege required
daall@sahale ~/repo/sonic-mgmt/ansible % sudo ./setup-management-network.sh 
STEP 1: Checking for bridge-utils package...
/usr/sbin/brctl

STEP 2: Checking for net-tools package...
/usr/sbin/ifconfig

STEP 3: Checking if bridge br1 already exists...
bridge br1 does not exist!

STEP 4: Creating management bridge br1...

COMPLETE. Bridge info:

bridge name	bridge id		STP enabled	interfaces
br1		8000.000000000000	no		

br1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.250.0.1  netmask 255.255.255.0  broadcast 10.250.0.255
        inet6 fe80::416:30ff:feba:f80e  prefixlen 64  scopeid 0x20<link>
        ether 06:16:30:ba:f8:0e  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Any platform specific information?

KVM

Supported testbed topology if it's a new test case?

N/A

Documentation

Updated README

[yxieca]

retest vsimage please