merge: Improve the check_connect script (!588)

View MR for information: https://activitypub.software/TransFem-org/Sharkey/-/merge_requests/588

Approved-by: fEmber <acomputerdog@gmail.com>
Approved-by: dakkar <dakkar@thenautilus.net>
Approved-by: Marie <marie@kaifa.ch>

packages/backend/scripts/check_connect.js

@@ -5,11 +5,33 @@
 
 import Redis from 'ioredis';
 import { loadConfig } from '../built/config.js';
+import { createPostgresDataSource } from '../built/postgres.js';
 
 const config = loadConfig();
-const redis = new Redis(config.redis);
 
-redis.on('connect', () => redis.disconnect());
+// createPostgresDataSource handels primaries and replicas automatically.
-redis.on('error', (e) => {
+// usually, it only opens connections first use, so we force it using
-	throw e;
+// .initialize()
-});
+createPostgresDataSource(config)
+	.initialize()
+	.then(c => { c.destroy() })
+	.catch(e => { throw e });
+
+
+// Connect to all redis servers
+function connectToRedis(redisOptions) {
+	const redis = new Redis(redisOptions);
+	redis.on('connect', () => redis.disconnect());
+	redis.on('error', (e) => {
+		throw e;
+	});
+}
+
+// If not all of these are defined, the default one gets reused.
+// so we use a Set to only try connecting once to each **uniq** redis.
+(new Set([
+	config.redis,
+	config.redisForPubsub,
+	config.redisForJobQueue,
+	config.redisForTimelines,
+])).forEach(connectToRedis);