.worker File Reference Guide
Note: this reference guide is deprecated. We have replaced these instructions with newer, simpler ones. Please see the Docker workflow guide instead.
We like to encourage our users to think of workers as independent chunks
of functionality, reusable building blocks that they can then build an
application out of.
.worker (pronounced dotworker) files serve to reinforce
this idea, by allowing users to define their workers outside of their application code.
.worker files are pretty easy to understand: their purpose is to construct
the code packages that are uploaded to the IronWorker cloud. This is done
in almost precisely the same way that code packages are constructed in
.worker files can be bundled with the workers and stored in
their own git repository, or moved about without any worry that unnecessary
code lingers in your application, cluttering it, or that you’re missing
code that it will take for your worker to run. Workers can finally be their
own self-contained units.
Table of Contents
Making a Worker File
A common misconception is that
.worker files are named “.worker” (e.g.,
This is not the case. Instead, the files are given unique names that will identify your worker in our system.
So, for example,
cool_worker.worker will create a worker named “cool_worker”.
Note: You should never have a file named ".worker". They should always be given a unique, recognisable name: "HelloWorld.worker", "SendMail.worker", "do_something_awesome.worker", etc.
.worker file mirrors the code you would use to construct a package
in your application. Here’s a simple example:
runtime "ruby" stack "ruby-1.9" exec "hello_worker.rb"
.worker file defines a code package that consists of a single
hello_worker.rb script, which is what will be executed when your worker
You can also add the files your worker is dependent upon:
runtime "ruby" stack "ruby-1.9" exec "hello_worker.rb" file "dependency.rb" file "config.json"
That worker will have access to the
after it’s uploaded.
Everything you can do in your application to construct a code package, you
can do in a
.worker file. Here’s an example that includes a gem:
runtime "ruby" stack "ruby-1.9" exec "hello_worker.rb" file "dependency.rb" file "config.json" gem "mongoid"
Not only will this worker have access to
it will have access to the
mongoid gem, as well.
Note: Gems merged with the .worker file will not be automatically required in your worker files, just as they are not when you merge gems in your application's code.
The following syntax is valid in
|runtime||all||Set worker's runtime|
|stack||all||Set worker's stack||
||Set worker's name
||The name to give the worker
||Sets an environment variable accessible within your worker.
||Activates full remote build mode.
||package dependencies remotely through uploaded package.json
||Merge a file and designate it as the file to be executed when the
worker is run. You may only have one file designated as the
executable per worker.
||Merge a file into the code package.
||Merge an entire directory (and all its contents) into the code package.
||Merge a x86_64 deb package into the code package. Note: dependencies
will not be handled.
The path to the deb file
||Merge a gem with its dependencies. Note: binary
extensions will not be merged, as they are not supported.
||Merge all the gems from the specified Gemfile.
||Merge a jar into code package. Note: it'll
be available in worker's classpath.
The path to jar file
||Merge a pip package with its dependencies.
||Merge all pip packages from the specified requirements.txt.
The path to the requirements.txt