use node cluster to shard server

src/core/configuration/Config.ts

@@ -15,7 +15,7 @@ import { Colord, colord } from "colord";
 import { preprodConfig } from "./PreprodConfig";
 import { prodConfig } from "./ProdConfig";
 import { consolex } from "../Consolex";
-import { GameConfig } from "../Schemas";
+import { GameConfig, GameID } from "../Schemas";
 import { DefaultConfig } from "./DefaultConfig";
 import { DevConfig, DevServerConfig } from "./DevConfig";
 import { GameMap, TileRef } from "../game/GameMap";
@@ -66,6 +66,11 @@ export interface ServerConfig {
   gameCreationRate(): number;
   lobbyLifetime(): number;
   discordRedirectURI(): string;
+  numWorkers(): number;
+  workerIndex(gameID: GameID): number;
+  workerPath(gameID: GameID): string;
+  workerPort(gameID: GameID): number;
+  workerPortByIndex(workerID: number): number;
   env(): GameEnv;
 }
 

src/core/configuration/DefaultConfig.ts

@@ -1,10 +1,8 @@
-import { renderNumber } from "../../client/Utils";
 import {
   Difficulty,
   Game,
   GameType,
   Gold,
-  MessageType,
   Player,
   PlayerInfo,
   PlayerType,
@@ -14,16 +12,19 @@ import {
   UnitInfo,
   UnitType,
 } from "../game/Game";
-import { GameMap, TileRef } from "../game/GameMap";
+import { TileRef } from "../game/GameMap";
 import { PlayerView } from "../game/GameView";
 import { UserSettings } from "../game/UserSettings";
-import { GameConfig } from "../Schemas";
-import { assertNever, within } from "../Util";
+import { GameConfig, GameID } from "../Schemas";
+import { assertNever, simpleHash, within } from "../Util";
 import { Config, GameEnv, ServerConfig, Theme } from "./Config";
 import { pastelTheme } from "./PastelTheme";
 import { pastelThemeDark } from "./PastelThemeDark";
 
 export abstract class DefaultServerConfig implements ServerConfig {
+  numWorkers(): number {
+    return 3;
+  }
   abstract env(): GameEnv;
   abstract discordRedirectURI(): string;
   turnIntervalMs(): number {
@@ -35,6 +36,18 @@ export abstract class DefaultServerConfig implements ServerConfig {
   lobbyLifetime(): number {
     return 2 * 60 * 1000;
   }
+  workerIndex(gameID: GameID): number {
+    return simpleHash(gameID) % this.numWorkers();
+  }
+  workerPath(gameID: GameID): string {
+    return `w${this.workerIndex(gameID)}`;
+  }
+  workerPort(gameID: GameID): number {
+    return this.workerPortByIndex(this.workerIndex(gameID));
+  }
+  workerPortByIndex(index: number): number {
+    return 3001 + index;
+  }
 }
 
 export class DefaultConfig implements Config {