feat(backend): support replication of postgresql

Resolve #10205

2 files changed, 26 insertions, 0 deletions

diff --git a/packages/backend/src/config.ts b/packages/backend/src/config.ts
index fd2b83cf2a..1443e63385 100644
--- a/packages/backend/src/config.ts
+++ b/packages/backend/src/config.ts
@@ -25,6 +25,16 @@ export type Source = {
 		disableCache?: boolean;
 		extra?: { [x: string]: string };
 	};
+	dbReplications?: boolean;
+	dbSlaves?: {
+		host: string;
+		port: number;
+		db: string;
+		user: string;
+		pass: string;
+		disableCache?: boolean;
+		extra?: { [x: string]: string };
+	}[];
 	redis: {
 		host: string;
 		port: number;
diff --git a/packages/backend/src/postgres.ts b/packages/backend/src/postgres.ts
index efeca46b49..bb21ed827e 100644
--- a/packages/backend/src/postgres.ts
+++ b/packages/backend/src/postgres.ts
@@ -200,6 +200,22 @@ export function createPostgresDataSource(config: Config) {
 			statement_timeout: 1000 * 10,
 			...config.db.extra,
 		},
+		replication: config.dbReplications ? {
+			master: {
+				host: config.db.host,
+				port: config.db.port,
+				username: config.db.user,
+				password: config.db.pass,
+				database: config.db.db,
+			},
+			slaves: config.dbSlaves!.map(rep => ({
+				host: rep.host,
+				port: rep.port,
+				username: rep.user,
+				password: rep.pass,
+				database: rep.db,
+			})),
+		} : undefined,
 		synchronize: process.env.NODE_ENV === 'test',
 		dropSchema: process.env.NODE_ENV === 'test',
 		cache: !config.db.disableCache && process.env.NODE_ENV !== 'test' ? { // dbをcloseしても何故かredisのコネクションが内部的に残り続けるようで、テストの際に支障が出るため無効にする(キャッシュも含めてテストしたいため本当は有効にしたいが...)