Properly evacuate cgroups on startup

cmd/hepto/service.go

@@ -63,7 +63,10 @@ var Run = &cobra.Command{
 	Use:   "run",
 	Short: "Actually run hepto inside the container",
 	// Determine current IP, which should run only once inside the container
+  // TODO: handle errors
 	PreRun: func(cmd *cobra.Command, args []string) {
+    // Start by evacuating cgroups
+    selfcontain.Evacuate()
 		// Install ourselves as a hooking binary
 		self, err := os.Executable()
 		if err != nil {
@@ -120,7 +123,10 @@ var Run = &cobra.Command{
 		}
 	},
 	RunE: func(cmd *cobra.Command, args []string) error {
-		c := services.NewManager(&config.Cluster, &config.Node, config.Logger)
+		c, err := services.NewManager(&config.Cluster, &config.Node, config.Logger)
+		if err != nil {
+			return err
+		}
 		return c.Run()
 	},
 }