14360: Merge branch 'master'

[arvados.git] / services / crunch-run / crunchrun.go

diff --git a/services/crunch-run/crunchrun.go b/services/crunch-run/crunchrun.go
index e5a1b94706c781cdc62e805e972c5f46ac0bba24..1c6c58009fac71bd5fa5015a4922821937e61d5a 100644 (file)
--- a/services/crunch-run/crunchrun.go
+++ b/services/crunch-run/crunchrun.go
@@ -1732,6 +1732,10 @@ func main() {
        cgroupParent := flag.String("cgroup-parent", "docker", "name of container's parent cgroup (ignored if -cgroup-parent-subsystem is used)")
        cgroupParentSubsystem := flag.String("cgroup-parent-subsystem", "", "use current cgroup for given subsystem as parent cgroup for container")
        caCertsPath := flag.String("ca-certs", "", "Path to TLS root certificates")
+       detach := flag.Bool("detach", false, "Detach from parent process and run in the background")
+       sleep := flag.Duration("sleep", 0, "Delay before starting (testing use only)")
+       kill := flag.Int("kill", -1, "Send signal to an existing crunch-run process for given UUID")
+       list := flag.Bool("list", false, "List UUIDs of existing crunch-run processes")
        enableNetwork := flag.String("container-enable-networking", "default",
                `Specify if networking should be enabled for container.  One of 'default', 'always':
        default: only enable networking if container requests it.
@@ -1743,8 +1747,30 @@ func main() {
        memprofile := flag.String("memprofile", "", "write memory profile to `file` after running container")
        getVersion := flag.Bool("version", false, "Print version information and exit.")
        flag.Duration("check-containerd", 0, "Ignored. Exists for compatibility with older versions.")
+
+       detached := false
+       if len(os.Args) > 1 && os.Args[1] == "-detached" {
+               // This process was invoked by a parent process, which
+               // has passed along its own arguments, including
+               // -detach, after the leading -detached flag.  Strip
+               // the leading -detached flag (it's not recognized by
+               // flag.Parse()) ... and remember not to detach all
+               // over again in this process.
+               os.Args = append([]string{os.Args[0]}, os.Args[2:]...)
+               detached = true
+       }
+
        flag.Parse()
 
+       switch {
+       case *detach && !detached:
+               os.Exit(Detach(flag.Arg(0), os.Args, os.Stdout, os.Stderr))
+       case *kill >= 0:
+               os.Exit(KillProcess(flag.Arg(0), syscall.Signal(*kill), os.Stdout, os.Stderr))
+       case *list:
+               os.Exit(ListProcesses(os.Stdout, os.Stderr))
+       }
+
        // Print version information if requested
        if *getVersion {
                fmt.Printf("crunch-run %s\n", version)
@@ -1752,6 +1778,7 @@ func main() {
        }
 
        log.Printf("crunch-run %s started", version)
+       time.Sleep(*sleep)
 
        containerId := flag.Arg(0)