start.go

// Copyright (c) 2014,2015,2016 Docker, Inc.
// Copyright (c) 2017 Intel Corporation
//
// 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 main

import (
	"fmt"

	vc "github.com/kata-containers/runtime/virtcontainers"
	"github.com/kata-containers/runtime/virtcontainers/pkg/oci"
	"github.com/urfave/cli"
)

var startCLICommand = cli.Command{
	Name:  "start",
	Usage: "executes the user defined process in a created container",
	ArgsUsage: `<container-id> [container-id...]

   <container-id> is your name for the instance of the container that you
   are starting. The name you provide for the container instance must be
   unique on your host.`,
	Description: `The start command executes the user defined process in a created container .`,
	Action: func(context *cli.Context) error {
		args := context.Args()
		if args.Present() == false {
			return fmt.Errorf("Missing container ID, should at least provide one")
		}

		for _, cID := range []string(args) {
			if _, err := start(cID); err != nil {
				return err
			}
		}

		return nil
	},
}

func start(containerID string) (vc.VCPod, error) {
	// Checks the MUST and MUST NOT from OCI runtime specification
	status, podID, err := getExistingContainerInfo(containerID)
	if err != nil {
		return nil, err
	}

	containerID = status.ID

	containerType, err := oci.GetContainerType(status.Annotations)
	if err != nil {
		return nil, err
	}

	if containerType.IsPod() {
		return vci.StartPod(podID)
	}

	c, err := vci.StartContainer(podID, containerID)
	if err != nil {
		return nil, err
	}

	return c.Pod(), nil
}