Constraint

A constraint is a way to limit where a task may run. Currently we only support two main types of constraint, os and arch. Eventually user-definable and other constraints will be available. Constraints may be grouped together to combine multiple constraints together.

Example Constraint

{
  "type": "os",
  "value": "windows"
}

Valid OS constraints

Below is a list of currently supported operating systems

OS
`windows`
`linux`
`darwin`
`freebsd`

Valid Arch constraints

Arch
`amd64`
`386`
`armv6`
`armv7`
`arm64`

Example Task With Constraints

This task would only be run on a 64-Bit Windows machine.

{
  "input": {
    "dataset": 2
  },
  "taskDefinition": {
    "constraints": [
      [
        {
          "type": "os",
          "value": "windows"
        },
        {
          "type": "arch",
          "value": "amd64"
        }
      ]
    ],
    "runner": {
      "type": "docker-json-runner",
      "manifest": {
        "*": {
          "image": "computes/fibonacci-sum-split:latest"
        }
      }
    },
    "result": {
      "action": "set",
      "destination": {
        "dataset": { "/": "<dataset-hash-here>" },
        "path": "split/results"
      }
    }
  },
  "status": {
    "/": "<status-hash-here>"
  }
}