AWS Shared ALB

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Creates a standalone ALB that is shared across stages. In dev, the ALB is referenced via Alb.get(). In production, it’s created fresh.

Uses the $dev ? get : new pattern to share infrastructure across stages.

sst.config.ts

const vpc = $dev
  ? sst.aws.Vpc.get("MyVpc", "vpc-xxx")
  : new sst.aws.Vpc("MyVpc");

const cluster = $dev
  ? sst.aws.Cluster.get("MyCluster", { id: "cluster-xxx", vpc })
  : new sst.aws.Cluster("MyCluster", { vpc });

const alb = $dev
  ? sst.aws.Alb.get("SharedAlb", "arn:aws:elasticloadbalancing:us-east-1:123456789012:loadbalancer/app/xxx")
  : new sst.aws.Alb("SharedAlb", {
      vpc,
      listeners: [
        { port: 80, protocol: "http" },
      ],
    });

if ($dev) {
  new sst.aws.Service("Web", {
    cluster,
    image: { context: "web/" },
    loadBalancer: {
      instance: alb,
      rules: [
        {
          listen: "80/http",
          forward: "3000/http",
          conditions: { path: "/app/*" },
          priority: 200,
        },
      ],
    },
  });
}

new sst.aws.Service("Api", {
  cluster,
  image: { context: "api/" },
  loadBalancer: {
    instance: alb,
    rules: [
      {
        listen: "80/http",
        forward: "3000/http",
        conditions: { path: "/api/*" },
        priority: 100,
      },
    ],
  },
});

View the full example.