Convert docker to runtime package

Signed-off-by: Evan Lezar <elezar@nvidia.com>

tools/container/runtime/docker/docker.go

@@ -0,0 +1,92 @@
+/**
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# 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.
+*/
+
+package docker
+
+import (
+	"fmt"
+
+	log "github.com/sirupsen/logrus"
+	cli "github.com/urfave/cli/v2"
+
+	"github.com/NVIDIA/nvidia-container-toolkit/pkg/config/engine/docker"
+	"github.com/NVIDIA/nvidia-container-toolkit/tools/container"
+)
+
+const (
+	Name = "docker"
+
+	DefaultConfig      = "/etc/docker/daemon.json"
+	DefaultSocket      = "/var/run/docker.sock"
+	DefaultRestartMode = "signal"
+)
+
+// Setup updates docker configuration to include the nvidia runtime and reloads it
+func Setup(c *cli.Context, o *container.Options) error {
+	log.Infof("Starting 'setup' for %v", c.App.Name)
+
+	cfg, err := docker.New(
+		docker.WithPath(o.Config),
+	)
+	if err != nil {
+		return fmt.Errorf("unable to load config: %v", err)
+	}
+
+	err = o.Configure(cfg)
+	if err != nil {
+		return fmt.Errorf("unable to configure docker: %v", err)
+	}
+
+	err = RestartDocker(o)
+	if err != nil {
+		return fmt.Errorf("unable to restart docker: %v", err)
+	}
+
+	log.Infof("Completed 'setup' for %v", c.App.Name)
+
+	return nil
+}
+
+// Cleanup reverts docker configuration to remove the nvidia runtime and reloads it
+func Cleanup(c *cli.Context, o *container.Options) error {
+	log.Infof("Starting 'cleanup' for %v", c.App.Name)
+
+	cfg, err := docker.New(
+		docker.WithPath(o.Config),
+	)
+	if err != nil {
+		return fmt.Errorf("unable to load config: %v", err)
+	}
+
+	err = o.Unconfigure(cfg)
+	if err != nil {
+		return fmt.Errorf("unable to unconfigure docker: %v", err)
+	}
+
+	err = RestartDocker(o)
+	if err != nil {
+		return fmt.Errorf("unable to signal docker: %v", err)
+	}
+
+	log.Infof("Completed 'cleanup' for %v", c.App.Name)
+
+	return nil
+}
+
+// RestartDocker restarts docker depending on the value of restartModeFlag
+func RestartDocker(o *container.Options) error {
+	return o.Restart("docker", SignalDocker)
+}