Cron on a Sleeping VM

npm install dedalus-labs

import Dedalus from "dedalus-labs";
const dedalus = new Dedalus({ apiKey: process.env.DEDALUS_API_KEY! });

const m = await dedalus.machines.create({ vcpu: 1, memory_mib: 1024, storage_gib: 10 });

// One-time setup: install whatever your job needs, persists forever.
await runAndWait(m.machine_id, ["/bin/bash", "-c",
  "apt-get update && apt-get install -y postgresql-client rclone && rclone config",
]);

console.log("MACHINE_ID=" + m.machine_id);
await dedalus.machines.sleep(m.machine_id);

async function runAndWait(machineId: string, command: string[], timeoutMs = 600_000) {
  const exc = await dedalus.machines.executions.create(machineId, { command, timeout_ms: timeoutMs });
  let status = exc.status;
  while (status !== "succeeded" && status !== "failed") {
    await new Promise((r) => setTimeout(r, 500));
    const cur = await dedalus.machines.executions.retrieve(machineId, exc.execution_id);
    status = cur.status;
  }
  return dedalus.machines.executions.output(machineId, exc.execution_id);
}

async function runCron() {
  const id = process.env.MACHINE_ID!;
  await dedalus.machines.wake(id);
  const out = await runAndWait(id, ["/bin/bash", "-c",
    "pg_dump $DATABASE_URL | gzip | rclone rcat backup:nightly/$(date -I).sql.gz",
  ], 300_000);
  console.log(out.stdout);
  await dedalus.machines.sleep(id);
}

runCron().catch((e) => { console.error(e); process.exit(1); });