Integrating with the API

Orchard has a REST API that follows OpenAPI specification and is described in api/openapi.yaml.

You can run orchard dev locally and navigate to http://127.0.0.1:6120/v1/ for interactive documentation.

Using the API

Below you'll find examples of using Orchard API via vanilla Python's request library and Golang package that Orchard CLI build on top of.

Authentication

When running in non-development mode, Orchard API expects a basic access authentication to be provided for each API call.

Below you'll find two snippets that retrieve controller's information and output its version:

Authentication in Python

import requests
from requests.auth import HTTPBasicAuth


def main():
  # Authentication
  basic_auth = HTTPBasicAuth("service account name", "service account token")

  response = requests.get("http://127.0.0.1:6120/v1/info", auth=basic_auth)

  print(response.json()["version"])


if __name__ == '__main__':
  main()

Authentication in Golang

package main

import (
  "context"
  "fmt"
  "github.com/cirruslabs/orchard/pkg/client"
  "log"
)

func main() {
  client, err := client.New()
  if err != nil {
    log.Fatalf("failed to initialize Orchard API client: %v", err)
  }

  controllerInfo, err := client.Controller().Info(context.Background())
  if err != nil {
    log.Fatalf("failed to retrieve controller's information: %v", err)
  }

  fmt.Println(controllerInfo.Version)
}

Note that we don't provide any credentials for Golang's version of the snippet: this is because Orchard's Golang API client (github.com/cirruslabs/orchard/pkg/client) has the ability to read the current's user Orchard context automatically.

Creating a VM

A more intricate example would be spinning off a VM with a startup script that outputs date, reading its logs and removing it from the controller:

Creating a VM in Python

import time
import uuid

import requests
from requests.auth import HTTPBasicAuth


def main():
  vm_name = str(uuid.uuid4())

  basic_auth = HTTPBasicAuth("service account name", "service account token")

  # Create VM
  response = requests.post("http://127.0.0.1:6120/v1/vms", auth=basic_auth, json={
    "name": vm_name,
    "image": "ghcr.io/cirruslabs/macos-sonoma-base:latest",
    "cpu": 4,
    "memory": 4096,
    "startup_script": {
      "script_content": "date",
    }
  })
  response.raise_for_status()

  # Retrieve VM's logs
  while True:
    response = requests.get(f"http://127.0.0.1:6120/v1/vms/{vm_name}/events", auth=basic_auth)
    response.raise_for_status()

    result = response.json()

    if isinstance(result, list) and len(result) != 0:
      print(result[0]["payload"])
      break

    time.sleep(1)

  # Delete VM
  response = requests.delete(f"http://127.0.0.1:6120/v1/vms/{vm_name}", auth=basic_auth)
  response.raise_for_status()


if __name__ == '__main__':
  main()

Creating a VM in Golang

package main

import (
  "context"
  "fmt"
  "github.com/cirruslabs/orchard/pkg/client"
  v1 "github.com/cirruslabs/orchard/pkg/resource/v1"
  "github.com/google/uuid"
  "log"
  "time"
)

func main() {
  vmName := uuid.New().String()

  client, err := client.New()
  if err != nil {
    log.Fatalf("failed to initialize Orchard API client: %v", err)
  }

  // Create VM
  err = client.VMs().Create(context.Background(), &v1.VM{
    Meta: v1.Meta{
      Name: vmName,
    },
    Image:  "ghcr.io/cirruslabs/macos-sonoma-base:latest",
    CPU:    4,
    Memory: 4096,
    StartupScript: &v1.VMScript{
      ScriptContent: "date",
    },
  })
  if err != nil {
    log.Fatalf("failed to create VM: %v")
  }

  // Retrieve VM's logs
  for {
    vmLogs, err := client.VMs().Logs(context.Background(), vmName)
    if err != nil {
      log.Fatalf("failed to retrieve VM logs")
    }

    if len(vmLogs) != 0 {
      fmt.Println(vmLogs[0])
      break
    }

    time.Sleep(time.Second)
  }

  // Delete VM
  if err := client.VMs().Delete(context.Background(), vmName); err != nil {
    log.Fatalf("failed to delete VM: %v", err)
  }
}

Resource management

Some resources, such as Worker and VM, have a resource field which is a dictionary that maps between resource names and their amounts (amount requested or amount provided, depending on the resource) and is useful for scheduling.

Well-known resources:

• org.cirruslabs.tart-vms — number of Tart VM slots available on the machine or requested by the VM
  • this number is 2 for workers and 1 for VMs by default