Destroying the cgroup if we can't to executor in exec and java drivers

client/driver/utils_linux.go

@@ -0,0 +1,40 @@
+package driver
+
+import (
+	"os/exec"
+	"syscall"
+
+	"fmt"
+	"github.com/opencontainers/runc/libcontainer/cgroups"
+	cgroupFs "github.com/opencontainers/runc/libcontainer/cgroups/fs"
+	"github.com/opencontainers/runc/libcontainer/cgroups/systemd"
+	cgroupConfig "github.com/opencontainers/runc/libcontainer/configs"
+)
+
+// isolateCommand sets the setsid flag in exec.Cmd to true so that the process
+// becomes the process leader in a new session and doesn't receive signals that
+// are sent to the parent process.
+func isolateCommand(cmd *exec.Cmd) {
+	if cmd.SysProcAttr == nil {
+		cmd.SysProcAttr = &syscall.SysProcAttr{}
+	}
+	cmd.SysProcAttr.Setsid = true
+}
+
+// destroyCgroup destroys a cgroup and thereby killing all the processes in that
+// group
+func destroyCgroup(group *cgroupConfig.Cgroup) error {
+	if group == nil {
+		return nil
+	}
+	var manager cgroups.Manager
+	manager = &cgroupFs.Manager{Cgroups: group}
+	if systemd.UseSystemd() {
+		manager = &systemd.Manager{Cgroups: group}
+	}
+
+	if err := manager.Destroy(); err != nil {
+		return fmt.Errorf("failed to destroy cgroup: %v", err)
+	}
+	return nil
+}