Merge "Add a way to add other container engines"

1 files changed, 57 insertions, 0 deletions

diff --git a/kolla/engine_adapter/engine.py b/kolla/engine_adapter/engine.py
new file mode 100644
index 000000000..184bb3856
--- /dev/null
+++ b/kolla/engine_adapter/engine.py
@@ -0,0 +1,57 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from distutils.version import StrictVersion
+from enum import Enum
+from kolla.image.utils import LOG
+
+try:
+    import docker
+except (ImportError):
+    LOG.debug("Docker python library was not found")
+
+
+class Engine(Enum):
+
+    DOCKER = "docker"
+
+
+class UnsupportedEngineError(ValueError):
+
+    def __init__(self, engine_name):
+        super().__init__()
+        self.engine_name = engine_name
+
+    def __str__(self):
+        return f'Unsupported engine name given: "{self.engine_name}"'
+
+
+def getEngineException(conf):
+    if conf.engine == Engine.DOCKER.value:
+        return (docker.errors.DockerException)
+    else:
+        raise UnsupportedEngineError(conf.engine)
+
+
+def getEngineClient(conf):
+    if conf.engine == Engine.DOCKER.value:
+        kwargs_env = docker.utils.kwargs_from_env()
+        return docker.APIClient(version='auto', **kwargs_env)
+    else:
+        raise UnsupportedEngineError(conf.engine)
+
+
+def getEngineVersion(conf):
+    if conf.engine == Engine.DOCKER.value:
+        return StrictVersion(docker.version)
+    else:
+        raise UnsupportedEngineError(conf.engine)