stream-info-service: Avoid creating indexes and reduce pool size (#2321)

Realized that every stream-info-service is trying to create all
the DB tables and indexes on startup. Theoretically they return
quickly as they already exist, but it still means we open up to
10 connections from each instance everytime a broadcaster pod
starts (or the stream-info restarts).

This is hopefully what's been causing connection issues with Postgres
just now.

packages/api/src/app/stream-info/parse-cli.ts

@@ -37,6 +37,17 @@ export function parseCli() {
         type: "string",
         demandOption: true,
       },
+      "postgres-create-tables": {
+        describe:
+          "create tables and indexes on the database if they don't exist",
+        type: "boolean",
+        default: false,
+      },
+      "postgres-conn-pool-size": {
+        describe: "size of the postgres connection pool",
+        type: "number",
+        default: 5,
+      },
     })
     .help()
     .parse();

packages/api/src/app/stream-info/stream-info-app.ts

@@ -1,19 +1,19 @@
 import express, { Router } from "express";
 import "express-async-errors"; // it monkeypatches, i guess
 import morgan from "morgan";
-import { db } from "../../store";
-import { healthCheck } from "../../middleware";
-import logger from "../../logger";
-import { Stream } from "../../schema/types";
 import fetch from "node-fetch";
 import { hostname } from "os";
+import logger from "../../logger";
+import { healthCheck } from "../../middleware";
+import { Stream } from "../../schema/types";
+import { db } from "../../store";
 
+import { DBStream } from "../../store/stream-table";
 import {
-  StatusResponse,
   MasterPlaylist,
   MasterPlaylistDictionary,
+  StatusResponse,
 } from "./livepeer-types";
-import { DBStream } from "../../store/stream-table";
 import { CliArgs } from "./parse-cli";
 
 const pollInterval = 2 * 1000; // 2s
@@ -377,9 +377,22 @@ class statusPoller {
 }
 
 export default async function makeApp(params: CliArgs) {
-  const { port, postgresUrl, ownRegion, listen = true, broadcaster } = params;
+  const {
+    port,
+    postgresUrl,
+    ownRegion,
+    listen = true,
+    broadcaster,
+    postgresCreateTables,
+    postgresConnPoolSize,
+  } = params;
   // Storage init
-  await db.start({ postgresUrl, appName: "stream-info" });
+  await db.start({
+    postgresUrl,
+    appName: "stream-info",
+    createTablesOnDb: postgresCreateTables,
+    poolMaxSize: postgresConnPoolSize,
+  });
 
   const { router } = await makeRouter(params);
   const app = express();