Lightweight Pattern

fjall create app --type lightweight

┌─────────────────┐
│      ALB        │ (2 AZ)
└────────┬────────┘
         |
┌────────┴────────┐
│  ECS Fargate    │ (FARGATE_SPOT, 1 task)
│  Spot           │ (256 CPU, 512 MiB)
└────────┬────────┘
         |
┌────────┴────────┐
│  RDS Instance   │ (2 AZ)
└─────────────────┘

#!/usr/bin/env node

import {
  App,
  DatabaseFactory,
  ComputeFactory,
  getConfig,
} from "@fjall/components-infrastructure";

const appName = "simple";
const app = App.getApp(appName);

app.addTags({
  "fjall:costAllocation:owner": "engineering",
});

const simpleStorage = app.addDatabase(
  DatabaseFactory.build("SimpleStorage", {
    type: "Instance",
    databaseName: "SimpleDatabase",
  }),
);

app.addCompute(
  ComputeFactory.build("SimpleCompute", {
    type: "ecs",
    ecrRepository: app.getDefaultContainerRegistry(),
    services: [
      {
        name: "app",
        capacityProvider: "FARGATE_SPOT",
        cpu: 256,
        memoryLimitMiB: 512,
        desiredCount: 1,
        scaling: {
          maxCapacity: 3,
        },
        containers: [
          {
            port: 3000,
            environment: {
              ENVIRONMENT: getConfig().environment,
              DATABASE_HOST: simpleStorage.getHostEndpoint(),
              DATABASE_PORT: `${simpleStorage.getHostPort()}`,
              DATABASE_NAME: simpleStorage.getDatabaseName(),
            },
            secretsImport: {
              DATABASE_PASSWORD: simpleStorage
                .getCredentials()
                .getImport("password"),
            },
          },
        ],
      },
    ],
  }),
);

app.addCompute(
  ComputeFactory.build("SimpleCompute", {
    type: "ecs",
    services: [
      {
        name: "app",
        capacityProvider: "FARGATE", // Switch from FARGATE_SPOT
        cpu: 256,
        memoryLimitMiB: 512,
      },
    ],
  }),
);

const simpleStorage = app.addDatabase(
  DatabaseFactory.build("SimpleStorage", {
    type: "Instance",
    databaseName: "SimpleDatabase",
    instanceType: "t4g.medium", // More power
  }),
);