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Chameleon ready pipeline

The  Chameleon ready pipeline badge is included in a repository hosting a Popper pipeline that is ready to be executed on ChameleonCloud. If you see it in a repository, it means that the authors have made it easier for others to run on Chameleon by following the Popper convention.

In this repository, we present an example of a pipeline that can be used as the starting point to implement a  Chameleon ready pipeline pipeline. To add it to your repository using popper, you can do:

popper add popperized/popper-readthedocs-examples/chameleon-benchmarking

If you add this pipeline to your repo (or if you follow the Popper convention to implement experiments on Chameleon), we invite you to add the badge to your README file.

Chameleon is an NSF funded cloud service that aims to give researchers access to large scale infrastructure for cloud research. Provisioning and running cloud experiments of any size with Chameleon is fast and simple. We can follow the Popper convention when implementing experimentation pipelins on Chameleon in order to make their reproducibility much more effortless. This pipeline provides an example and template for an experiment that automatically runs on Chameleon.

You can get started on your own Chameleon ready pipeline by adding this pipeline to your own repository by running:

popper add popperized/popper-readthedocs-examples/chameleon-benchmarking

This pipeline consists of three stages:

  1. A setup stage creates a reservation and allocates the requested resources on chameleon. You may modify this stage and the scripts/request.py script to change the amount and type of resources allocated. Once this is done, an ansible inventory is output to the inventory directory
  2. The run stage carries out the actual experiment. By default this runs a couple of benchmarks using Baseliner
  3. The teardown stage deletes the lease used to allocate resources, destroying them.

Running manually

Follow these steps to run this pipeline using your computer as host

  1. Make sure docker is installed and running. You can find instructions on installing docker here.
  2. Save the ssh key you are using inside the credentials directory under the name popper-key.pem.
  3. Source your Chameleon Openstack config. The Chameleon docs has a section on this.
  4. Run the pipeline with popper run.

Automated execution

You can set this pipeline up to run on your prefered continous integration service by using the popper cli. In addition to following the instructions in that link, make sure these environment variables are set in your continious integration environment.


You can find most of these inside the Chameleon configuration file downloaded in the previous section.

For running on CI, you also need to make sure your ssh key is present inside the credential directory upon execution. Make sure not to check in your private ssh keys on git, ever. You can instead use the services provided by your CI service to encrypt sensitive files.

Travis CI

Specifically, if you want to run this pipeline on travis, you have to first follow these extra steps

  1. Initialize the repository for CI by running popper ci --service travis.
  2. Set up the aforementioned environment variables. The travis docs has a section on adding environment variables during runtime on Travis. Make sure you conceal sensitive data, such as passwords.
  3. Add the secret private keyfile as credentials/popper-key.pem. This section of the travis docs shows you how.

Once you've completed these steps, you can simply push a commit to github to trigger a travis build job.