add support for stop_signal to compose file

Signed-off-by: Jonathan Stewmon <jstewmon@rmn.com>

compose/config/config.py

@@ -62,6 +62,7 @@ DOCKER_CONFIG_KEYS = [
     'restart',
     'security_opt',
     'stdin_open',
+    'stop_signal',
     'tty',
     'user',
     'volume_driver',

compose/config/service_schema_v1.json

@@ -94,6 +94,7 @@
         "restart": {"type": "string"},
         "security_opt": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
         "stdin_open": {"type": "boolean"},
+        "stop_signal": {"type": "string"},
         "tty": {"type": "boolean"},
         "ulimits": {
           "type": "object",

compose/config/service_schema_v2.json

@@ -101,6 +101,7 @@
         "restart": {"type": "string"},
         "security_opt": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
         "stdin_open": {"type": "boolean"},
+        "stop_signal": {"type": "string"},
         "tty": {"type": "boolean"},
         "ulimits": {
           "type": "object",

compose/container.py

@@ -107,6 +107,10 @@ class Container(object):
     def labels(self):
         return self.get('Config.Labels') or {}
 
+    @property
+    def stop_signal(self):
+        return self.get('Config.StopSignal')
+
     @property
     def log_config(self):
         return self.get('HostConfig.LogConfig') or None
@@ -132,6 +136,10 @@ class Container(object):
     def environment(self):
         return dict(var.split("=", 1) for var in self.get('Config.Env') or [])
 
+    @property
+    def exit_code(self):
+        return self.get('State.ExitCode')
+
     @property
     def is_running(self):
         return self.get('State.Running')