main_command.go

package main

import (
	"fmt"
	"os"

	log "github.com/sirupsen/logrus"
	"github.com/urfave/cli"

	"github.com/Zioyi/zocker/cgroups/subsystems"
	"github.com/Zioyi/zocker/container"
)

var initCommand = cli.Command{
	Name:  "init",
	Usage: "Init container process run user's process in container. Do not call is outside",
	Action: func(context *cli.Context) error {
		log.Infof("init come on")
		err := container.RunContainerInitProcess()
		return err
	},
}

var runCommand = cli.Command{
	Name: "run",
	Usage: `Create a container with namespace and cgroup limit
	zocker run -ti [command]`,
	Flags: []cli.Flag{
		cli.BoolFlag{
			Name:  "ti",
			Usage: "enable tty",
		},
		cli.BoolFlag{
			Name:  "d",
			Usage: "detach container",
		},
		cli.StringFlag{
			Name:  "v",
			Usage: "volume",
		},
		cli.StringFlag{
			Name:  "m",
			Usage: "memory limit",
		},
		cli.StringFlag{
			Name:  "cpushare",
			Usage: "cpushare limit",
		},
		cli.StringFlag{
			Name:  "cpuset",
			Usage: "cpuset limit",
		},
		cli.StringFlag{
			Name:  "name",
			Usage: "container name",
		},
		cli.StringSliceFlag{
			Name:  "e",
			Usage: "set environment",
		},
	},
	Action: func(context *cli.Context) error {
		if len(context.Args()) < 1 {
			return fmt.Errorf("missing container command")
		}
		var cmdArray []string
		for _, arg := range context.Args() {
			cmdArray = append(cmdArray, arg)
		}
		tty := context.Bool("ti")
		detach := context.Bool("d")
		if tty && detach {
			return fmt.Errorf("ti and d parameter can not both provided")
		}
		volume := context.String("v")
		resConf := &subsystems.ResourceConfig{
			MemoryLimit: context.String("m"),
			CpuShare:    context.String("cpushare"),
			CpuSet:      context.String("cpuset"),
		}
		containerName := context.String("name")

		imageName := cmdArray[0]
		cmdArray = cmdArray[1:]
		envVariables := context.StringSlice("e")
		Run(tty, cmdArray, resConf, volume, containerName, imageName, envVariables)
		return nil
	},
}

var commitCommand = cli.Command{
	Name:  "commit",
	Usage: "commit a container into image",
	Action: func(context *cli.Context) error {
		if len(context.Args()) < 2 {
			return fmt.Errorf("mssing container name and image name")
		}
		containerName := context.Args().Get(0)
		imageName := context.Args().Get(1)
		commitContainer(containerName, imageName)
		return nil
	},
}

var listCommand = cli.Command{
	Name:  "ps",
	Usage: "list all the containers",
	Action: func(context *cli.Context) error {
		ListContainers()
		return nil
	},
}

var logCommand = cli.Command{
	Name:  "logs",
	Usage: "Fetch the logs of a container",
	Flags: []cli.Flag{
		cli.BoolFlag{
			Name:  "f",
			Usage: "Follow log output",
		},
	},
	Action: func(context *cli.Context) error {
		if len(context.Args()) < 1 {
			return fmt.Errorf("missing container name")
		}
		containerName := context.Args().Get(0)
		follow := context.Bool("f")

		LogContainer(containerName, follow)
		return nil
	},
}

var execCommand = cli.Command{
	Name:  "exec",
	Usage: "exec a command into container",
	Action: func(context *cli.Context) error {
		if os.Getenv(ENV_EXEC_PID) != "" {
			log.Infof("pid callback pid %d", os.Getpid())
			return nil
		}

		if len(context.Args()) < 2 {
			return fmt.Errorf("missing container name or command")
		}
		containerName := context.Args().Get(0)
		var commandArray []string
		for _, arg := range context.Args().Tail() {
			commandArray = append(commandArray, arg)
		}
		ExecContainer(containerName, commandArray)
		return nil
	},
}

var stopCommand = cli.Command{
	Name:  "stop",
	Usage: "stop a running container",
	Action: func(context *cli.Context) error {
		if len(context.Args()) < 1 {
			return fmt.Errorf("missing container name")
		}
		containerName := context.Args().Get(0)
		StopContainer(containerName)
		return nil
	},
}

var removeCommand = cli.Command{
	Name:  "rm",
	Usage: "remove a stopped container",
	Action: func(context *cli.Context) error {
		if len(context.Args()) < 1 {
			return fmt.Errorf("missing container name")
		}
		containerName := context.Args().Get(0)
		RemoveContainer(containerName)
		return nil
	},
}