115 lines
4.1 KiB
Plaintext
115 lines
4.1 KiB
Plaintext
---
|
|
layout: "docs"
|
|
page_title: "Commands: job dispatch"
|
|
sidebar_current: "docs-commands-job-dispatch"
|
|
description: >
|
|
The dispatch command is used to create an instance of a parameterized job.
|
|
---
|
|
|
|
# Command: job dispatch
|
|
|
|
~> The `job dispatch` subcommand described here is available only in version
|
|
0.5.3 and later. The release canidate is downloadable on the [releases
|
|
page.](https://releases.hashicorp.com/nomad/0.5.3-rc1/)
|
|
|
|
The `job dispatch` command is used to create new instances of a [parameterized
|
|
job]. The parameterized job captures a job's configuration and runtime
|
|
requirements in a generic way and `dispatch` is used to provide the input for
|
|
the job to run against. A parameterized job is similar to a function definition,
|
|
and dispatch is used to invoke the function.
|
|
|
|
Each time a job is dispatched, a unique job ID is generated. This allows a
|
|
caller to track the status of the job, much like a future or promise in some
|
|
programming languages.
|
|
|
|
## Usage
|
|
|
|
```
|
|
nomad job dispatch [options] <parameterized job> [input source]
|
|
```
|
|
|
|
Dispatch creates an instance of a parameterized job. A data payload to the
|
|
dispatched instance can be provided via stdin by using "-" for the input source
|
|
or by specifiying a path to a file. Metadata can be supplied by using the meta
|
|
flag one or more times.
|
|
|
|
The payload has a **size limit of 16KiB**.
|
|
|
|
Upon successfully creation, the dispatched job ID will be printed and the
|
|
triggered evaluation will be monitored. This can be disabled by supplying the
|
|
detach flag.
|
|
|
|
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.
|
|
|
|
## General Options
|
|
|
|
<%= partial "docs/commands/_general_options" %>
|
|
|
|
## Run Options
|
|
|
|
* `-meta`: Meta takes a key/value pair seperated by "=". The metadata key will
|
|
be merged into the job's metadata. The job may define a default value for the
|
|
key which is overriden when dispatching. The flag can be provided more than
|
|
once to inject multiple metadata key/value pairs. Arbitrary keys are not
|
|
allowed. The parameterized job must allow the key to be merged.
|
|
|
|
* `-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
|
|
|
|
* `-verbose`: Show full information.
|
|
|
|
## Examples
|
|
|
|
Dispatch against a parameterized job with the ID "video-encode" and
|
|
passing in a configuration payload via stdin:
|
|
|
|
```
|
|
$ cat << EOF | nomad job dispatch video-encode -
|
|
{
|
|
"s3-input": "https://s3-us-west-1.amazonaws.com/video-bucket/cb31dabb1",
|
|
"s3-output": "https://s3-us-west-1.amazonaws.com/video-bucket/a149adbe3",
|
|
"input-codec": "mp4",
|
|
"output-codec": "webm",
|
|
"quality": "1080p"
|
|
}
|
|
EOF
|
|
Dispatched Job ID = video-encode/dispatch-1485379325-cb38d00d
|
|
Evaluation ID = 31199841
|
|
|
|
==> Monitoring evaluation "31199841"
|
|
Evaluation triggered by job "example/dispatch-1485379325-cb38d00d"
|
|
Allocation "8254b85f" created: node "82ff9c50", group "cache"
|
|
Evaluation status changed: "pending" -> "complete"
|
|
==> Evaluation "31199841" finished with status "complete"
|
|
```
|
|
|
|
Dispatch against a parameterized job with the ID "video-encode" and
|
|
passing in a configuration payload via a file:
|
|
|
|
```
|
|
$ nomad job dispatch video-encode video-config.json
|
|
Dispatched Job ID = video-encode/dispatch-1485379325-cb38d00d
|
|
Evaluation ID = 31199841
|
|
|
|
==> Monitoring evaluation "31199841"
|
|
Evaluation triggered by job "example/dispatch-1485379325-cb38d00d"
|
|
Allocation "8254b85f" created: node "82ff9c50", group "cache"
|
|
Evaluation status changed: "pending" -> "complete"
|
|
==> Evaluation "31199841" finished with status "complete"
|
|
```
|
|
|
|
Dispatch against a parameterized job with the ID "video-encode" using the detach
|
|
flag:
|
|
|
|
```
|
|
$ nomad job dispatch -detach video-encode video-config.json
|
|
Dispatched Job ID = example/dispatch-1485380684-c37b3dba
|
|
Evaluation ID = d9034c4e
|
|
```
|
|
|
|
[parameterized job]: /docs/job-specification/parameterized.html "Nomad parameterized Job Specification"
|