Override network mtu value

Author: aledbf

pkg/compose/create.go

@@ -1052,6 +1052,16 @@ func (s *composeService) ensureNetwork(ctx context.Context, n types.NetworkConfi
 				}
 				createOpts.IPAM.Config = append(createOpts.IPAM.Config, config)
 			}
+
+			// override MTU value and set custom MTU one.
+			// This is required for gitpod.io due to the veth change
+			// https://github.com/gitpod-io/gitpod/pull/8955
+			if createOpts.Options == nil {
+				createOpts.Options = make(map[string]string)
+			}
+
+			createOpts.Options["com.docker.network.driver.mtu"] = "1440"
+
 			networkEventName := fmt.Sprintf("Network %s", n.Name)
 			w := progress.ContextWriter(ctx)
 			w.Event(progress.CreatingEvent(networkEventName))