Add support for restart policy update

Signed-off-by: Maxime Feron <maxime.feron@corp.ovh.com>

docker/api/container.py

@@ -421,7 +421,8 @@ class ContainerApiMixin(object):
     def update_container(
         self, container, blkio_weight=None, cpu_period=None, cpu_quota=None,
         cpu_shares=None, cpuset_cpus=None, cpuset_mems=None, mem_limit=None,
-        mem_reservation=None, memswap_limit=None, kernel_memory=None
+        mem_reservation=None, memswap_limit=None, kernel_memory=None,
+        restart_policy=None
     ):
         url = self._url('/containers/{0}/update', container)
         data = {}
@@ -445,6 +446,13 @@ class ContainerApiMixin(object):
             data['MemorySwap'] = utils.parse_bytes(memswap_limit)
         if kernel_memory:
             data['KernelMemory'] = utils.parse_bytes(kernel_memory)
+        if restart_policy:
+            if utils.version_lt(self._version, '1.23'):
+                raise errors.InvalidVersion(
+                    'restart policy update is not supported '
+                    'for API version < 1.23'
+                )
+            data['RestartPolicy'] = restart_policy
 
         res = self._post_json(url, data=data)
         return self._result(res, True)

docs/api.md

@@ -1126,6 +1126,7 @@ Update resource configs of one or more containers.
 * mem_reservation (int or str): Memory soft limit
 * memswap_limit (int or str): Total memory (memory + swap), -1 to disable swap
 * kernel_memory (int or str): Kernel memory limit
+* restart_policy (dict): Restart policy dictionary
 
 **Returns** (dict): Dictionary containing a `Warnings` key.
 

tests/integration/container_test.py

@@ -1104,6 +1104,36 @@ class ContainerUpdateTest(helpers.BaseTestCase):
         inspect_data = self.client.inspect_container(container)
         self.assertEqual(inspect_data['HostConfig']['Memory'], new_mem_limit)
 
+    @requires_api_version('1.23')
+    def test_restart_policy_update(self):
+        old_restart_policy = {
+            'MaximumRetryCount': 0,
+            'Name': 'always'
+        }
+        new_restart_policy = {
+            'MaximumRetryCount': 42,
+            'Name': 'on-failure'
+        }
+        container = self.client.create_container(
+            BUSYBOX, ['sleep', '60'],
+            host_config=self.client.create_host_config(
+                restart_policy=old_restart_policy
+            )
+        )
+        self.tmp_containers.append(container)
+        self.client.start(container)
+        self.client.update_container(container,
+                                     restart_policy=new_restart_policy)
+        inspect_data = self.client.inspect_container(container)
+        self.assertEqual(
+            inspect_data['HostConfig']['RestartPolicy']['MaximumRetryCount'],
+            new_restart_policy['MaximumRetryCount']
+        )
+        self.assertEqual(
+            inspect_data['HostConfig']['RestartPolicy']['Name'],
+            new_restart_policy['Name']
+        )
+
 
 class ContainerCPUTest(helpers.BaseTestCase):
     @requires_api_version('1.18')