runc/pause.go

package main

import (
	"github.com/sirupsen/logrus"
	"github.com/urfave/cli"
)

var pauseCommand = cli.Command{
	Name:  "pause",
	Usage: "pause suspends all processes inside the container",
	ArgsUsage: `<container-id>

Where "<container-id>" is the name for the instance of the container to be
paused. `,
	Description: `The pause command suspends all processes in the instance of the container.

Use runc list to identify instances of containers and their current status.`,
	Action: func(context *cli.Context) error {
		if err := checkArgs(context, 1, exactArgs); err != nil {
			return err
		}
		rootlessCg, err := shouldUseRootlessCgroupManager(context)
		if err != nil {
			return err
		}
		if rootlessCg {
			logrus.Warnf("runc pause may fail if you don't have the full access to cgroups")
		}
		container, err := getContainer(context)
		if err != nil {
			return err
		}
		err = container.Pause()
		if err != nil {
			return err
		}
		return nil
	},
}

var resumeCommand = cli.Command{
	Name:  "resume",
	Usage: "resumes all processes that have been previously paused",
	ArgsUsage: `<container-id>

Where "<container-id>" is the name for the instance of the container to be
resumed.`,
	Description: `The resume command resumes all processes in the instance of the container.

Use runc list to identify instances of containers and their current status.`,
	Action: func(context *cli.Context) error {
		if err := checkArgs(context, 1, exactArgs); err != nil {
			return err
		}
		rootlessCg, err := shouldUseRootlessCgroupManager(context)
		if err != nil {
			return err
		}
		if rootlessCg {
			logrus.Warn("runc resume may fail if you don't have the full access to cgroups")
		}
		container, err := getContainer(context)
		if err != nil {
			return err
		}
		err = container.Resume()
		if err != nil {
			return err
		}
		return nil
	},
}