feat(networks): add MTU option to network creation

packages/server/src/db/schema/network.ts

@@ -1,5 +1,12 @@
 import { relations } from "drizzle-orm";
-import { boolean, jsonb, pgEnum, pgTable, text } from "drizzle-orm/pg-core";
+import {
+	boolean,
+	integer,
+	jsonb,
+	pgEnum,
+	pgTable,
+	text,
+} from "drizzle-orm/pg-core";
 import { createInsertSchema } from "drizzle-zod";
 import { nanoid } from "nanoid";
 import { z } from "zod";
@@ -19,6 +26,7 @@ export const network = pgTable("network", {
 	attachable: boolean("attachable").notNull().default(false),
 	enableIPv4: boolean("enableIPv4").notNull().default(true),
 	enableIPv6: boolean("enableIPv6").notNull().default(false),
+	mtu: integer("mtu"),
 	ipam: jsonb("ipam")
 		.$type<{
 			driver?: string;
@@ -55,6 +63,7 @@ const createSchema = createInsertSchema(network, {
 	attachable: z.boolean().optional(),
 	enableIPv4: z.boolean().optional(),
 	enableIPv6: z.boolean().optional(),
+	mtu: z.number().int().min(68).max(65535).optional().nullable(),
 	ipam: z
 		.object({
 			driver: z.string().optional(),
@@ -109,6 +118,7 @@ export const apiCreateNetwork = createSchema
 		attachable: true,
 		enableIPv4: true,
 		enableIPv6: true,
+		mtu: true,
 		ipam: true,
 		serverId: true,
 	})

packages/server/src/services/network.ts

@@ -24,6 +24,7 @@ type DockerNetworkInfo = {
 	Ingress?: boolean;
 	EnableIPv4?: boolean;
 	EnableIPv6?: boolean;
+	Options?: Record<string, string> | null;
 	IPAM?: {
 		Driver?: string;
 		Config?: Array<{
@@ -34,6 +35,11 @@ type DockerNetworkInfo = {
 	};
 };
 
+const parseMtu = (value: string | undefined) => {
+	const mtu = Number.parseInt(value ?? "", 10);
+	return Number.isNaN(mtu) ? null : mtu;
+};
+
 const isImportableDockerNetwork = (dockerNetwork: DockerNetworkInfo) =>
 	!RESERVED_NETWORKS.includes(dockerNetwork.Name) &&
 	!dockerNetwork.Ingress &&
@@ -51,6 +57,7 @@ const mapDockerNetworkToRow = (
 	// Older daemons don't report EnableIPv4; IPv4 is always on there
 	enableIPv4: dockerNetwork.EnableIPv4 ?? true,
 	enableIPv6: dockerNetwork.EnableIPv6 ?? false,
+	mtu: parseMtu(dockerNetwork.Options?.["com.docker.network.driver.mtu"]),
 	ipam: {
 		driver: dockerNetwork.IPAM?.Driver,
 		config: (dockerNetwork.IPAM?.Config ?? []).map((c) => ({
@@ -255,6 +262,9 @@ const createDockerNetworkFromRow = async (row: typeof network.$inferSelect) => {
 			// the daemon (API >= 1.47); the body is sent as-is
 			EnableIPv4: row.enableIPv4,
 			EnableIPv6: row.enableIPv6,
+			Options: row.mtu
+				? { "com.docker.network.driver.mtu": String(row.mtu) }
+				: undefined,
 			IPAM: {
 				Driver: ipam.driver || "default",
 				Config: ipamConfig.length > 0 ? ipamConfig : undefined,