feature/IO-2972-Final-Redis-Sockets-Add Redis Cluster aware logic

Signed-off-by: Dave Richer <dave@imexsystems.ca>

server.js

@@ -15,6 +15,8 @@ const logger = require("./server/utils/logger");
 const { applyRedisHelpers } = require("./server/utils/redisHelpers");
 const { applyIOHelpers } = require("./server/utils/ioHelpers");
 const { redisSocketEvents } = require("./server/web-sockets/redisSocketEvents");
+const { ElastiCacheClient, DescribeCacheClustersCommand } = require("@aws-sdk/client-elasticache");
+const { default: InstanceManager } = require("./server/utils/instanceMgr");
 
 // Load environment variables
 require("dotenv").config({
@@ -106,28 +108,65 @@ const applyRoutes = ({ app }) => {
   });
 };
 
+/**
+ * Fetch Redis nodes from AWS ElastiCache
+ * @returns {Promise<string[]>}
+ */
+const getRedisNodesFromAWS = async () => {
+  const client = new ElastiCacheClient({
+    region: InstanceManager({
+      imex: "ca-central-1",
+      rome: "us-east-2"
+    })
+  });
+
+  const params = {
+    ReplicationGroupId: process.env.REDIS_CLUSTER_ID,
+    ShowCacheNodeInfo: true
+  };
+
+  try {
+    // Fetch the cache clusters associated with the replication group
+    const command = new DescribeCacheClustersCommand(params);
+    const response = await client.send(command);
+    const cacheClusters = response.CacheClusters;
+
+    return cacheClusters.flatMap((cluster) =>
+      cluster.CacheNodes.map((node) => `${node.Endpoint.Address}:${node.Endpoint.Port}`)
+    );
+  } catch (err) {
+    logger.log(`Error fetching Redis nodes from AWS: ${err.message}`, "ERROR", "redis", "api");
+    throw err;
+  }
+};
+
 /**
  * Connect to Redis Cluster
  * @returns {Promise<unknown>}
  */
-const connectToRedisCluster = () => {
-  if (isEmpty(process.env?.REDIS_URL) || !isString(process.env?.REDIS_URL)) {
-    logger.log(`[${process.env.NODE_ENV}] No or Malformed REDIS_URL present.`, "ERROR", "redis", "api");
-    process.exit(1);
-  }
-
+const connectToRedisCluster = async () => {
   let redisServers;
 
-  try {
-    redisServers = JSON.parse(process.env.REDIS_URL);
-  } catch (error) {
-    logger.log(
-      `[${process.env.NODE_ENV}] Failed to parse REDIS_URL: ${error.message}. Exiting...`,
-      "ERROR",
-      "redis",
-      "api"
-    );
-    process.exit(1);
+  if (isString(process.env?.REDIS_CLUSTER_ID) && !isEmpty(process.env?.REDIS_CLUSTER_ID)) {
+    // Fetch Redis nodes from AWS if AWS environment variables are present
+    redisServers = await getRedisNodesFromAWS();
+  } else {
+    // Use the Dockerized Redis cluster in development
+    if (isEmpty(process.env?.REDIS_URL) || !isString(process.env?.REDIS_URL)) {
+      logger.log(`[${process.env.NODE_ENV}] No or Malformed REDIS_URL present.`, "ERROR", "redis", "api");
+      process.exit(1);
+    }
+    try {
+      redisServers = JSON.parse(process.env.REDIS_URL);
+    } catch (error) {
+      logger.log(
+        `[${process.env.NODE_ENV}] Failed to parse REDIS_URL: ${error.message}. Exiting...`,
+        "ERROR",
+        "redis",
+        "api"
+      );
+      process.exit(1);
+    }
   }
 
   const clusterRetryStrategy = (times) => {