lxd/instance/exec: Only use keepalives on TCP sockets

lxd/instance_exec.go

@@ -99,23 +99,23 @@ func (s *execWs) Connect(op *operations.Operation, r *http.Request, w http.Respo
 					if err != nil {
 						logger.Warn("Failed setting TCP timeouts on remote connection", logger.Ctx{"err": err})
 					}
-				}
 
-				// Start channel keep alive to run until channel is closed.
-				go func() {
-					pingInterval := time.Second * 10
-					t := time.NewTicker(pingInterval)
-					defer t.Stop()
+					// Start channel keep alive to run until channel is closed.
+					go func() {
+						pingInterval := time.Second * 10
+						t := time.NewTicker(pingInterval)
+						defer t.Stop()
 
-					for {
-						err := conn.WriteControl(websocket.PingMessage, []byte("keepalive"), time.Now().Add(5*time.Second))
-						if err != nil {
-							return
-						}
+						for {
+							err := conn.WriteControl(websocket.PingMessage, []byte("keepalive"), time.Now().Add(5*time.Second))
+							if err != nil {
+								return
+							}
 
-						<-t.C
-					}
-				}()
+							<-t.C
+						}
+					}()
+				}
 
 				if fd == execWSControl {
 					s.waitControlConnected.Cancel() // Control connection connected.