client/lxd/instances: Consume ping messages from server for exec cont…

…rol and stdin channels

Signed-off-by: Thomas Parrott <[email protected]>

client/lxd_instances.go

@@ -1210,6 +1210,10 @@ func (r *ProtocolLXD) ExecInstance(instanceName string, exec api.InstanceExecPos
 				return nil, err
 			}
 
+			go func() {
+				_, _, _ = conn.ReadMessage() // Consume pings from server.
+			}()
+
 			go args.Control(conn)
 		}
 
@@ -1249,6 +1253,10 @@ func (r *ProtocolLXD) ExecInstance(instanceName string, exec api.InstanceExecPos
 					return nil, err
 				}
 
+				go func() {
+					_, _, _ = conn.ReadMessage() // Consume pings from server.
+				}()
+
 				conns = append(conns, conn)
 				dones[0] = ws.MirrorRead(conn, args.Stdin)
 			}