157 lines
3.5 KiB
Go
157 lines
3.5 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"io"
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"os"
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"strconv"
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"time"
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"github.com/Sirupsen/logrus"
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"github.com/docker/containerd/shim"
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"github.com/docker/containerkit"
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"github.com/docker/containerkit/osutils"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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)
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func reloadContainer() error {
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// create a new runtime runtime that implements the ExecutionDriver interface
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runtime, err := shim.Load("/run/cshim/test")
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if err != nil {
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return err
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}
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dockerContainer := &testConfig{}
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container, err := containerkit.LoadContainer(dockerContainer, runtime)
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if err != nil {
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return err
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}
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// wait for it to exit and get the exit status
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logrus.Info("wait container")
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status, err := container.Wait()
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if err != nil {
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return err
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}
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// delete the container after it is done
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logrus.Info("delete container")
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if container.Delete(); err != nil {
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return err
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}
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logrus.Infof("exit status %d", status)
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return nil
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}
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func runContainer() error {
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// create a new runtime runtime that implements the ExecutionDriver interface
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runtime, err := shim.New(shim.Opts{
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Root: "/run/cshim/test",
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Name: "containerd-shim",
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RuntimeName: "runc",
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RuntimeRoot: "/run/runc",
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Timeout: 5 * time.Second,
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})
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if err != nil {
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return err
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}
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dockerContainer := &testConfig{}
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// create a new container
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container, err := containerkit.NewContainer(dockerContainer, NewBindDriver(), runtime)
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if err != nil {
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return err
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}
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// setup some stdio for our container
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container.Stdin = Stdin("")
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container.Stdout = Stdout("")
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container.Stderr = Stderr("")
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// go ahead and set the container in the create state and have it ready to start
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logrus.Info("create container")
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if err := container.Create(); err != nil {
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return err
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}
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// start the user defined process in the container
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logrus.Info("start container")
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if err := container.Start(); err != nil {
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return err
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}
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for i := 0; i < exec; i++ {
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process, err := container.NewProcess(&specs.Process{
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Args: []string{
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"sh", "-c",
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"echo " + fmt.Sprintf("sup from itteration %d", i),
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},
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Env: env,
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Terminal: false,
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Cwd: "/",
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NoNewPrivileges: true,
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Capabilities: caps,
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})
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process.Stdin = Stdin(strconv.Itoa(i))
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stdout := Stdout(strconv.Itoa(i))
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stderr := Stderr(strconv.Itoa(i))
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go io.Copy(os.Stdout, stdout)
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go io.Copy(os.Stdout, stderr)
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process.Stdout = stdout
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process.Stderr = stderr
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if err := process.Start(); err != nil {
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return err
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}
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procStatus, err := process.Wait()
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if err != nil {
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return err
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}
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logrus.Infof("process %d returned with %d", i, procStatus)
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}
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if load {
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return nil
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}
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// wait for it to exit and get the exit status
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logrus.Info("wait container")
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status, err := container.Wait()
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if err != nil {
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return err
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}
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// delete the container after it is done
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logrus.Info("delete container")
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if container.Delete(); err != nil {
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return err
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}
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logrus.Infof("exit status %d", status)
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return nil
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}
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var (
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exec int
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load bool
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reload bool
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)
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// "Hooks do optional work. Drivers do mandatory work"
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func main() {
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flag.IntVar(&exec, "exec", 0, "run n number of execs")
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flag.BoolVar(&load, "load", false, "reload the container")
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flag.BoolVar(&reload, "reload", false, "reload the container live")
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flag.Parse()
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if err := osutils.SetSubreaper(1); err != nil {
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logrus.Fatal(err)
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}
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if reload {
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if err := reloadContainer(); err != nil {
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logrus.Fatal(err)
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}
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return
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}
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if err := runContainer(); err != nil {
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logrus.Fatal(err)
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}
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}
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