enhance(backend): add unix socket support (#11275)

* unix socket support

* add changelog

* lint

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

5 files changed, 21 insertions, 3 deletions

diff --git a/.config/example.yml b/.config/example.yml
index c8735bf699..fcf22debce 100644
--- a/.config/example.yml
+++ b/.config/example.yml
@@ -30,6 +30,10 @@ url: https://example.tld/
 # The port that your Misskey server should listen on.
 port: 3000
 
+# You can also use UNIX domain socket. 
+# socket: /path/to/misskey.sock
+# chmodSocket: '777'
+
 #   ┌──────────────────────────┐
 #───┘ PostgreSQL configuration └────────────────────────────────
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 85e459b950..480dc2c9a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -61,6 +61,7 @@
 - Fix: Remove Meilisearch index when notes are deleted
 - Fix: 非英語環境でのPostgreSQLのエラーハンドリングを修正
 - Fix: インスタンスのアイコンがbase64の場合の挙動を修正
+- Add unix socket support
 
 ## 13.13.2
 
diff --git a/packages/backend/src/boot/master.ts b/packages/backend/src/boot/master.ts
index b04234fd1f..c253f697f7 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(config.socket ? `Now listening on socket ${config.socket} on ${config.url}` : `Now listening on port ${config.port} on ${config.url}`, null, true);
 }
 
 function showEnvironment(): void {
diff --git a/packages/backend/src/config.ts b/packages/backend/src/config.ts
index 23ed6e59bc..8c312256da 100644
--- a/packages/backend/src/config.ts
+++ b/packages/backend/src/config.ts
@@ -14,7 +14,9 @@ export type Source = {
 	repository_url?: string;
 	feedback_url?: string;
 	url: string;
-	port: number;
+	port?: number;
+	socket?: string;
+	chmodSocket?: string;
 	disableHsts?: boolean;
 	db: {
 		host: string;
diff --git a/packages/backend/src/server/ServerService.ts b/packages/backend/src/server/ServerService.ts
index 1bae71617b..051920958e 100644
--- a/packages/backend/src/server/ServerService.ts
+++ b/packages/backend/src/server/ServerService.ts
@@ -224,7 +224,18 @@ export class ServerService implements OnApplicationShutdown {
 			}
 		});
 
-		fastify.listen({ port: this.config.port, host: '0.0.0.0' });
+		if (this.config.socket) {
+			if (fs.existsSync(this.config.socket)) {
+				fs.unlinkSync(this.config.socket);
+			}
+			fastify.listen({ path: this.config.socket }, (err, address) => {
+				if (this.config.chmodSocket) {
+					fs.chmodSync(this.config.socket!, this.config.chmodSocket);
+				}
+			});
+		} else {
+			fastify.listen({ port: this.config.port, host: '0.0.0.0' });
+		}
 
 		await fastify.ready();
 	}