docker: Terminate instances at SIGTERM and SIGHUP

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <1474429768-25027-9-git-send-email-famz@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>

tests/docker/docker.py

@@ -21,6 +21,7 @@
 import argparse
 import tempfile
 import re
+import signal
 from tarfile import TarFile, TarInfo
 from StringIO import StringIO
 from shutil import copy, rmtree
@@ -101,6 +102,8 @@ def __init__(self):
         self._command = _guess_docker_command()
         self._instances = []
         atexit.register(self._kill_instances)
+        signal.signal(signal.SIGTERM, self._kill_instances)
+        signal.signal(signal.SIGHUP, self._kill_instances)
 
     def _do(self, cmd, quiet=True, infile=None, **kwargs):
         if quiet:
@@ -133,7 +136,7 @@ def clean(self):
         self._do_kill_instances(False, False)
         return 0
 
-    def _kill_instances(self):
+    def _kill_instances(self, *args, **kwargs):
         return self._do_kill_instances(True)
 
     def _output(self, cmd, **kwargs):