add maintenance mode

backend/src/lib/config/env.ts

@@ -114,7 +114,8 @@ const envSchema = z
       .enum(["true", "false"])
       .transform((val) => val === "true")
       .optional(),
-    INFISICAL_CLOUD: zodStrBool.default("false")
+    INFISICAL_CLOUD: zodStrBool.default("false"),
+    MAINTENANCE_MODE: zodStrBool.default("false")
   })
   .transform((data) => ({
     ...data,

backend/src/server/app.ts

@@ -24,6 +24,7 @@ import { fastifyErrHandler } from "./plugins/error-handler";
 import { registerExternalNextjs } from "./plugins/external-nextjs";
 import { serializerCompiler, validatorCompiler, ZodTypeProvider } from "./plugins/fastify-zod";
 import { fastifyIp } from "./plugins/ip";
+import { maintenanceMode } from "./plugins/maintenanceMode";
 import { fastifySwagger } from "./plugins/swagger";
 import { registerRoutes } from "./routes";
 
@@ -72,6 +73,8 @@ export const main = async ({ db, smtp, logger, queue, keyStore }: TMain) => {
     }
     await server.register(helmet, { contentSecurityPolicy: false });
 
+    await server.register(maintenanceMode);
+
     await server.register(registerRoutes, { smtp, queue, db, keyStore });
 
     if (appCfg.isProductionMode) {

backend/src/server/plugins/maintenanceMode.ts

@@ -0,0 +1,12 @@
+import fp from "fastify-plugin";
+
+import { getConfig } from "@app/lib/config/env";
+
+export const maintenanceMode = fp(async (fastify) => {
+  fastify.addHook("onRequest", async (req) => {
+    const serverEnvs = getConfig();
+    if (req.url !== "/api/v1/auth/checkAuth" && req.method !== "GET" && serverEnvs.MAINTENANCE_MODE) {
+      throw new Error("Infisical is in maintenance mode. Please try again later.");
+    }
+  });
+});

backend/src/server/routes/v1/admin-router.ts

@@ -16,13 +16,16 @@ export const registerAdminRouter = async (server: FastifyZodProvider) => {
     schema: {
       response: {
         200: z.object({
-          config: SuperAdminSchema.omit({ createdAt: true, updatedAt: true })
+          config: SuperAdminSchema.omit({ createdAt: true, updatedAt: true }).merge(
+            z.object({ isMigrationModeOn: z.boolean() })
+          )
         })
       }
     },
     handler: async () => {
       const config = await getServerCfg();
-      return { config };
+      const serverEnvs = getConfig();
+      return { config: { ...config, isMigrationModeOn: serverEnvs.MAINTENANCE_MODE } };
     }
   });