c7testvm: Allow using a specific name instead of generating one

c7testvm.py

@@ -149,6 +149,7 @@ def wait_for_host(host, port, timeout=300):
 
 def parse_args():
     parser = argparse.ArgumentParser()
+    parser.add_argument('--name')
     parser.add_argument('--ram', type=int, default=1024)
     parser.add_argument('--vcpus', type=int, default=2)
     parser.add_argument('--cpu', default='host')
@@ -166,6 +167,9 @@ def parse_args():
 def main():
     args = parse_args()
 
+    if args.name:
+        name = args.name
+    else:
         name = 'C7-{}'.format(binascii.hexlify(os.urandom(3)).decode())
     hostname = '{}.local'.format(name.lower())
 
@@ -212,7 +216,10 @@ def main():
     p = subprocess.Popen(cmd, env=env)
     httpd.handle_request()
     httpd.server_close()
+    try:
         p.wait()
+    except KeyboardInterrupt:
+        raise SystemExit(1)
     print('Waiting for host to come up...')
     if wait_for_host(hostname, 22):
         os.execlp('ssh', 'ssh', '-oStrictHostKeyChecking=no',