Deployment on OpenShift

OpenShift is an Open-Source Platform-as-a-Service software by Red Hat. It is also available in its hosted version known as “OpenShift Online” and the first three websites (“gears”) are free.

Clone the repository

You should fork the project on github and use the fork’s clone url. For the sake of the demo, we’ll use the main repository URL:

$ git clone https://github.com/political-memory/political_memory.git
Cloning into 'political_memory'...
remote: Counting objects: 2516, done.
remote: Compressing objects: 100% (109/109), done.
remote: Total 2516 (delta 44), reused 0 (delta 0), pack-reused 2402
Receiving objects: 100% (2516/2516), 4.40 MiB | 79.00 KiB/s, done.
Resolving deltas: 100% (1103/1103), done.
Checking connectivity... done.

$ cd political_memory/

Create your own branch, ie:

$ git checkout -b yourbranch origin/pr
Branch yourbranch set up to track remote branch pr from origin.
Switched to a new branch 'yourbranch'

Create an app on OpenShift

To deploy the website, use a command like:

$ rhc app-create \
    python-2.7 \
    cron-1.4 \
    postgresql-9.2 \
    -a yourappname \
    -e OPENSHIFT_PYTHON_WSGI_APPLICATION=memopol/wsgi.py \
    --from-code https://github.com/political-memory/political_memory.git \
    --no-git

This should create an app on openshift. Other commands would deploy it at once but in this tutorial we’re going to see how to manage it partly manually for development.

Add the git remote created by OpenShift

Add the git remote openshift created for you, you can see it with rhc app-show, ie.:

$ rhc app-show -a yourappname
[snip]
Git URL:         ssh://569f5cf500045f6a1839a0a4@yourappname-yourdomain.rhcloud.com/~/git/yourappname.git/
Initial Git URL: https://github.com/political-memory/political_memory.git
SSH:             569f5cf500045f6a1839a0a4@yourappname-yourdomain.rhcloud.com
[snip]

$ git remote add oo_yourappname ssh://569f5cf500045f6a1839a0a4@yourappname-yourdomain.rhcloud.com/~/git/yourappname.git/

Activate OpenShift’s git post-recieve hook

Activate OpenShift’s post-receive hook on your branch:

$ rhc app-configure -a yourappname --deployment-branch yourbranch

Deploy your branch

OpenShift will deploy when it receives commits on the deployment branch, to deploy just do:

$ git push oo_yourappname yourbranch

If something goes wrong and you want to retry, use the rhc app-deploy command, ie:

$ rhc app-deploy yourbranch -a yourappname

Data provisionning

To fill up the representatives database table, either wait for the cron script to be executed, either do it manually:

$ rhc ssh -a yourappname 'cd app-root/repo/ && bin/update_all'

OpenShift is fun, login with ssh and look around if you’re curious, you’ll be able to recreate your app without much effort if you break it anyway.

Continue to Administrator guide.