Allow configuring the listen host (#9924)

3 files changed, 6 insertions, 4 deletions

diff --git a/packages/backend/src/boot/master.ts b/packages/backend/src/boot/master.ts
index f5d936fadf..008f9ec587 100644
--- a/packages/backend/src/boot/master.ts
+++ b/packages/backend/src/boot/master.ts
@@ -78,7 +78,7 @@ export async function masterMain() {
 		await spawnWorkers(config.clusterLimit);
 	}
 
-	bootLogger.succ(`Now listening on port ${config.port} on ${config.url}`, null, true);
+	bootLogger.succ(`Now listening on ${config.host ? `[${config.host}]:` : ''}${config.port} for ${config.url}`, null, true);
 }
 
 function showEnvironment(): void {
diff --git a/packages/backend/src/config.ts b/packages/backend/src/config.ts
index 73f45e92e1..0572002239 100644
--- a/packages/backend/src/config.ts
+++ b/packages/backend/src/config.ts
@@ -15,6 +15,7 @@ export type Source = {
 	feedback_url?: string;
 	url: string;
 	port: number;
+	host: string;
 	disableHsts?: boolean;
 	db: {
 		host: string;
@@ -125,6 +126,7 @@ export function loadConfig() {
 	config.url = url.origin;
 
 	config.port = config.port ?? parseInt(process.env.PORT ?? '', 10);
+	config.host = config.host ?? process.env.HOST;
 
 	mixin.version = meta.version;
 	mixin.host = url.host;
diff --git a/packages/backend/src/server/ServerService.ts b/packages/backend/src/server/ServerService.ts
index 8200b24fd4..9ae4cf4db6 100644
--- a/packages/backend/src/server/ServerService.ts
+++ b/packages/backend/src/server/ServerService.ts
@@ -176,10 +176,10 @@ export class ServerService {
 		fastify.server.on('error', err => {
 			switch ((err as any).code) {
 				case 'EACCES':
-					this.logger.error(`You do not have permission to listen on port ${this.config.port}.`);
+					this.logger.error(`You do not have permission to listen on port ${this.config.port}${this.config.host ? ` of host ${this.config.host}` : ''}`);
 					break;
 				case 'EADDRINUSE':
-					this.logger.error(`Port ${this.config.port} is already in use by another process.`);
+					this.logger.error(`Port ${this.config.port}${this.config.host ? ` on ${this.config.host}` : ''} is already in use by another process.`);
 					break;
 				default:
 					this.logger.error(err);
@@ -194,6 +194,6 @@ export class ServerService {
 			}
 		});
 
-		fastify.listen({ port: this.config.port, host: '0.0.0.0' });
+		fastify.listen({ port: this.config.port, host: this.config.host });
 	}
 }