---
layout: "docs"
page_title: "Commands: run"
sidebar_current: "docs-commands-run"
description: >
  The run command is used to run a new job.
---

# Command: run

The `run` command is used to submit new jobs to Nomad or to update existing
jobs. Job files must conform to the [job specification](/docs/jobspec/index.html)
format.

## Usage

```
nomad run [options] <file>
```

The run command requires a single argument, specifying the path to a file
containing a valid [job specification](/docs/jobspec/index.html). This file
will be read and the job will be submitted to Nomad for scheduling.

By default, on successful job submission the run command will enter an
interactive monitor and display log information detailing the scheduling
decisions and placement information for the provided job. The monitor will
exit after scheduling has finished or failed.

On successful job submission and scheduling, exit code 0 will be returned. If
there are job placement issues encountered (unsatisfiable constraints, resource
exhaustion, etc), then the exit code will be 2. Any other errors, including
client connection issues or internal errors, are indicated by exit code 1.

If the job has specified the region, the -region flag and NOMAD_REGION
environment variable are overridden and the the job's region is used.

## General Options

<%= general_options_usage %>

## Run Options

* `-check-index`: If set, the job is only registered or
  updated if the the passed job modify index matches the server side version.
  If a check-index value of zero is passed, the job is only registered if it does
  not yet exist. If a non-zero value is passed, it ensures that the job is being
  updated from a known state. The use of this flag is most common in conjunction
  with [plan command](/docs/commands/plan.html).

* `-detach`: Return immediately instead of monitoring. A new evaluation ID
  will be output, which can be used to examine the evaluation using the
  [eval-status](/docs/commands/eval-status.html) command

* `-output`: Output the JSON that would be submitted to the HTTP API without
  submitting the job.

## Status Options

* `-verbose`: Show full information.

## Examples

Schedule the job contained in the file `job1.nomad`, monitoring placement:

```
$ nomad run job1.nomad
==> Monitoring evaluation "52dee78a"
    Allocation "5e0b39f0" created: node "3e84d3d2", group "group1"
    Allocation "5e0b39f0" status changed: "pending" -> "running"
    Evaluation status changed: "pending" -> "complete"
==> Evaluation "52dee78a" finished with status "complete"
```

<a id="check-index"></a> Update the job using `check-index`:

```
$ nomad run -check-index 5 example.nomad
Enforcing job modify index 5: job exists with conflicting job modify index: 6
Job not updated

$ nomad run -check-index 6 example.nomad
==> Monitoring evaluation "5ef16dff"
    Evaluation triggered by job "example"
    Allocation "6ec7d16f" modified: node "6e1f9bf6", group "cache"
    Evaluation status changed: "pending" -> "complete"
==> Evaluation "5ef16dff" finished with status "complete"
```

Schedule the job contained in `job1.nomad` and return immediately:

```
$ nomad run -detach job1.nomad
4947e728
```

Schedule a job which cannot be successfully placed. This results in a scheduling
failure and the specifics of the placement are printed:

```
$ nomad run failing.nomad
==> Monitoring evaluation "2ae0e6a5"
    Evaluation triggered by job "example"
    Evaluation status changed: "pending" -> "complete"
==> Evaluation "2ae0e6a5" finished with status "complete" but failed to place all allocations:
    Task Group "cache" (failed to place 1 allocation):
      * Class "foo" filtered 1 nodes
      * Constraint "${attr.kernel.name} = linux" filtered 1 nodes
    Evaluation "67493a64" waiting for additional capacity to place remainder
```
