chore: add redis v2 health check

server/src/external/redis/initUtils/redisV2Availability.ts

@@ -2,17 +2,34 @@ import {
 	hasRedisV2Config,
 	redisV2,
 } from "../initRedisV2.js";
-import { createRedisAvailability } from "./createRedisAvailability.js";
-import { shouldUseRedis } from "./redisAvailability.js";
+import {
+	createRedisAvailability,
+	type RedisAvailabilitySnapshot,
+} from "./createRedisAvailability.js";
+import {
+	getRedisAvailability,
+	shouldUseRedis,
+} from "./redisAvailability.js";
 import { redis as primaryRedis } from "./redisClientRegistry.js";
 
 const usesPrimaryRedis = redisV2 === primaryRedis;
 const noop = () => {};
+const getPrimaryBackedRedisV2Availability = (): RedisAvailabilitySnapshot => {
+	const availability = getRedisAvailability();
+
+	return {
+		configured: hasRedisV2Config,
+		state: availability.state,
+		status: availability.status,
+	};
+};
+
 const redisV2Availability = usesPrimaryRedis
 	? {
 			startMonitor: noop,
 			stopMonitor: noop,
 			shouldUseRedis,
+			getRedisAvailability: getPrimaryBackedRedisV2Availability,
 		}
 	: createRedisAvailability({
 			redis: redisV2,
@@ -25,6 +42,12 @@ const {
 	startMonitor: startRedisV2Monitor,
 	stopMonitor: stopRedisV2Monitor,
 	shouldUseRedis: shouldUseRedisV2,
+	getRedisAvailability: getRedisV2Availability,
 } = redisV2Availability;
 
-export { startRedisV2Monitor, stopRedisV2Monitor, shouldUseRedisV2 };
+export {
+	getRedisV2Availability,
+	startRedisV2Monitor,
+	stopRedisV2Monitor,
+	shouldUseRedisV2,
+};

server/src/honoUtils/handleReadyCheck.ts

@@ -3,6 +3,7 @@ import type { Context } from "hono";
 import { clientCritical } from "@/db/initDrizzle.js";
 import { getPgHealthState } from "@/db/pgHealthMonitor.js";
 import { getRedisAvailability } from "@/external/redis/initRedis.js";
+import { getRedisV2Availability } from "@/external/redis/initUtils/redisV2Availability.js";
 import type { HonoEnv } from "./HonoEnv.js";
 
 const POSTGRES_TIMEOUT_MS = 1_000;
@@ -45,6 +46,7 @@ export const handleReadyCheck = async (c: Context<HonoEnv>) => {
 
 	const postgres = await checkPostgresReady();
 	const redis = getRedisAvailability();
+	const redisV2 = getRedisV2Availability();
 	const ok = postgres.ok;
 	const status = ok ? 200 : 503;
 
@@ -54,6 +56,7 @@ export const handleReadyCheck = async (c: Context<HonoEnv>) => {
 			checks: {
 				postgres,
 				redis,
+				redisV2,
 			},
 		},
 		status,