Add systemd cgroup directory

(cherry picked from commit f6ebb5002e)

cmd/control/console_init.go

@@ -11,6 +11,8 @@ import (
 	"strings"
 	"syscall"
 
+	"golang.org/x/sys/unix"
+
 	"github.com/codegangsta/cli"
 	"github.com/rancher/os/cmd/cloudinitexecute"
 	"github.com/rancher/os/config"
@@ -108,6 +110,14 @@ func consoleInitFunc() error {
 		}
 	}
 
+	// mount systemd cgroups
+	if err := os.MkdirAll("/sys/fs/cgroup/systemd", 0555); err != nil {
+		log.Error(err)
+	}
+	if err := unix.Mount("cgroup", "/sys/fs/cgroup/systemd", "cgroup", 0, "none,name=systemd"); err != nil {
+		log.Error(err)
+	}
+
 	// font backslashes need to be escaped for when issue is output! (but not the others..)
 	if err := ioutil.WriteFile("/etc/issue", []byte(config.Banner), 0644); err != nil {
 		log.Error(err)