add support for `runtime` option in service definitions

close #5360

Signed-off-by: Yafeng Shan <cuckoo@kokonur.me>

compose/config/config.py

@@ -97,6 +97,7 @@ DOCKER_CONFIG_KEYS = [
     'privileged',
     'read_only',
     'restart',
+    'runtime',
     'secrets',
     'security_opt',
     'shm_size',

compose/config/config_schema_v2.3.json

@@ -261,6 +261,7 @@
         "privileged": {"type": "boolean"},
         "read_only": {"type": "boolean"},
         "restart": {"type": "string"},
+        "runtime": {"type": "string"},
         "scale": {"type": "integer"},
         "security_opt": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
         "shm_size": {"type": ["number", "string"]},

compose/service.py

@@ -87,6 +87,7 @@ HOST_CONFIG_KEYS = [
     'pids_limit',
     'privileged',
     'restart',
+    'runtime',
     'security_opt',
     'shm_size',
     'storage_opt',
@@ -858,6 +859,7 @@ class Service(object):
             dns_opt=options.get('dns_opt'),
             dns_search=options.get('dns_search'),
             restart_policy=options.get('restart'),
+            runtime=options.get('runtime'),
             cap_add=options.get('cap_add'),
             cap_drop=options.get('cap_drop'),
             mem_limit=options.get('mem_limit'),

tests/integration/project_test.py

@@ -22,6 +22,7 @@ from compose.config.types import VolumeSpec
 from compose.const import COMPOSEFILE_V2_0 as V2_0
 from compose.const import COMPOSEFILE_V2_1 as V2_1
 from compose.const import COMPOSEFILE_V2_2 as V2_2
+from compose.const import COMPOSEFILE_V2_3 as V2_3
 from compose.const import COMPOSEFILE_V3_1 as V3_1
 from compose.const import LABEL_PROJECT
 from compose.const import LABEL_SERVICE
@@ -31,10 +32,12 @@ from compose.errors import NoHealthCheckConfigured
 from compose.project import Project
 from compose.project import ProjectError
 from compose.service import ConvergenceStrategy
+from tests.integration.testcases import if_runtime_available
 from tests.integration.testcases import is_cluster
 from tests.integration.testcases import no_cluster
 from tests.integration.testcases import v2_1_only
 from tests.integration.testcases import v2_2_only
+from tests.integration.testcases import v2_3_only
 from tests.integration.testcases import v2_only
 from tests.integration.testcases import v3_only
 
@@ -971,6 +974,66 @@ class ProjectTest(DockerClientTestCase):
         with self.assertRaises(ProjectError):
             project.up()
 
+    @v2_3_only()
+    def test_up_with_runtime(self):
+        self.require_api_version('1.30')
+        config_data = build_config(
+            version=V2_3,
+            services=[{
+                'name': 'web',
+                'image': 'busybox:latest',
+                'runtime': 'runc'
+            }],
+        )
+        project = Project.from_config(
+            client=self.client,
+            name='composetest',
+            config_data=config_data
+        )
+        project.up(detached=True)
+        service_container = project.get_service('web').containers(stopped=True)[0]
+        assert service_container.inspect()['HostConfig']['Runtime'] == 'runc'
+
+    @v2_3_only()
+    def test_up_with_invalid_runtime(self):
+        self.require_api_version('1.30')
+        config_data = build_config(
+            version=V2_3,
+            services=[{
+                'name': 'web',
+                'image': 'busybox:latest',
+                'runtime': 'foobar'
+            }],
+        )
+        project = Project.from_config(
+            client=self.client,
+            name='composetest',
+            config_data=config_data
+        )
+        with self.assertRaises(ProjectError):
+            project.up()
+
+    @v2_3_only()
+    @if_runtime_available('nvidia')
+    def test_up_with_nvidia_runtime(self):
+        self.require_api_version('1.30')
+        config_data = build_config(
+            version=V2_3,
+            services=[{
+                'name': 'web',
+                'image': 'busybox:latest',
+                'runtime': 'nvidia'
+            }],
+        )
+        project = Project.from_config(
+            client=self.client,
+            name='composetest',
+            config_data=config_data
+        )
+        project.up(detached=True)
+        service_container = project.get_service('web').containers(stopped=True)[0]
+        assert service_container.inspect()['HostConfig']['Runtime'] == 'nvidia'
+
     @v2_only()
     def test_project_up_with_network_internal(self):
         self.require_api_version('1.23')

tests/integration/testcases.py

@@ -5,6 +5,7 @@ import functools
 import os
 
 import pytest
+import six
 from docker.errors import APIError
 from docker.utils import version_lt
 
@@ -155,6 +156,25 @@ class DockerClientTestCase(unittest.TestCase):
         return self.client.inspect_volume(volumes[0]['Name'])
 
 
+def if_runtime_available(runtime):
+    if runtime == 'nvidia':
+        command = 'nvidia-container-runtime'
+        if six.PY3:
+            import shutil
+            return pytest.mark.skipif(
+                    shutil.which(command) is None,
+                    reason="Nvida runtime not exists"
+                    )
+        return pytest.mark.skipif(
+                any(
+                    os.access(os.path.join(path, command), os.X_OK)
+                    for path in os.environ["PATH"].split(os.pathsep)
+                    ) is False,
+                reason="Nvida runtime not exists"
+                )
+    return pytest.skip("Runtime %s not exists", runtime)
+
+
 def is_cluster(client):
     if SWARM_ASSUME_MULTINODE:
         return True

tests/unit/config/config_test.py

@@ -1678,6 +1678,25 @@ class ConfigTest(unittest.TestCase):
             }
         ]
 
+    def test_runtime_option(self):
+        actual = config.load(build_config_details({
+            'version': str(V2_3),
+            'services': {
+                'web': {
+                    'image': 'nvidia/cuda',
+                    'runtime': 'nvidia'
+                }
+            }
+        }))
+
+        assert actual.services == [
+            {
+                'name': 'web',
+                'image': 'nvidia/cuda',
+                'runtime': 'nvidia',
+            }
+        ]
+
     def test_merge_service_dicts_from_files_with_extends_in_base(self):
         base = {
             'volumes': ['.:/app'],