Added the docker_actions module

acme-copy-certs/app/docker_actions.py

+import docker
+
+class DockerAction:
+    def __init__(self, docker_client, container_id):
+        self.client = docker_client
+        self.container_id = container_id
+        pass
+
+    def exec(self, id):
+        c = self.client.container.get(self.container_id)
+
+        if c.status == 'running':
+            self.action(c)
+
+    def action(self, container):
+        pass
+
+class RestartDockerAction(DockerAction):
+    def __init__(self, docker_client, container_id):
+        super().__init__(docker_client, container_id)
+
+    def action(self, container):
+        try:
+            container.restart()
+        except docker.errors.APIError:
+            print('Unable to restart container {0}({1})'.format(container.name,
+                container.id))
+
+class KillDockerAction(DockerAction):
+    def __init__(self, docker_client, container_id, signal='SIGKILL'):
+        super().__init__(docker_client, container_id)
+        self.signal = signal
+
+    def action(self, container):
+        try:
+            container.kill(self.signal)
+        except docker.errors.APIError:
+            print('Unable to kill container {0}({1}) with signal {2}'
+                .format(container.name, self.container_id, self.signal))
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