Initialize the docker client from environment instead of arguments. (#2098)

* Initialize the docker client from environment instead of the arguments.

* Initialize the docker client from environment instead of the arguments.

* Update the client doc.

Author: brightcoder01

docs/designs/client_tool.md

@@ -58,12 +58,7 @@ this command-line client tool.
 1. Build the Docker image for an ElasticDL job.
 
     ```bash
-    elasticdl zoo build
-        --image=a_docker_registry/bright/elasticdl-wnd:1.0
-        [--docker_base_url=docke_base_url]
-        [--docker_tlscert=docker_tlscert]
-        [--docker_tlskey=docker_tlskey]
-        .
+    elasticdl zoo build --image=a_docker_registry/bright/elasticdl-wnd:1.0 .
     ```
 
 1. Push the Docker image to a remote registry.
@@ -79,7 +74,7 @@ this command-line client tool.
 
     ```bash
     elasticdl train \
-        --image=a_docker_registry/bright/elasticdl-wnd:1.0 \
+        --image_name=a_docker_registry/bright/elasticdl-wnd:1.0 \
         --model_zoo=model_zoo
         --model_def=a_directory.wide_and_deep.custom_model \
         --training_data=/data/mnist/train \

elasticdl_client/api.py

@@ -75,12 +75,8 @@ def build_zoo(args):
     logger.info("Build the image for the model zoo.")
     # Call docker api to build the image
     # Validate the image name schema
-    client = _get_docker_client(
-        docker_base_url=args.docker_base_url,
-        docker_tlscert=args.docker_tlscert,
-        docker_tlskey=args.docker_tlskey,
-    )
-    for line in client.build(
+    client = docker.DockerClient.from_env()
+    for line in client.api.build(
         dockerfile="./Dockerfile",
         path=args.path,
         rm=True,
@@ -93,13 +89,8 @@ def build_zoo(args):
 def push_zoo(args):
     logger.info("Push the image for the model zoo.")
     # Call docker api to push the image to remote registry
-    client = _get_docker_client(
-        docker_base_url=args.docker_base_url,
-        docker_tlscert=args.docker_tlscert,
-        docker_tlskey=args.docker_tlskey,
-    )
-
-    for line in client.push(args.image, stream=True, decode=True):
+    client = docker.DockerClient.from_env()
+    for line in client.api.push(args.image, stream=True, decode=True):
         _print_docker_progress(line)
 
 

elasticdl_client/common/args.py

@@ -49,7 +49,6 @@ def add_zoo_build_arguments(parser):
         help="The name of the docker image we are building for"
         "this model zoo.",
     )
-    add_docker_arguments(parser)
 
 
 def add_zoo_push_arguments(parser):
@@ -58,28 +57,6 @@ def add_zoo_push_arguments(parser):
         type=str,
         help="The name of the docker image for this model zoo.",
     )
-    add_docker_arguments(parser)
-
-
-def add_docker_arguments(parser):
-    parser.add_argument(
-        "--docker_base_url",
-        type=str,
-        help="URL to the Docker server",
-        default="unix://var/run/docker.sock",
-    )
-    parser.add_argument(
-        "--docker_tlscert",
-        type=str,
-        help="Path to Docker client cert",
-        default="",
-    )
-    parser.add_argument(
-        "--docker_tlskey",
-        type=str,
-        help="Path to Docker client key",
-        default="",
-    )
 
 
 def add_train_params(parser):