{"id":3520,"date":"2013-10-06T14:50:46","date_gmt":"2013-10-06T14:50:46","guid":{"rendered":"http:\/\/www.cloudcomp.ch\/?p=3520"},"modified":"2019-08-05T14:00:26","modified_gmt":"2019-08-05T12:00:26","slug":"openstack-development-process","status":"publish","type":"post","link":"https:\/\/blog.zhaw.ch\/icclab\/openstack-development-process\/","title":{"rendered":"OpenStack Development Process"},"content":{"rendered":"\n

by Josef Spillner<\/a><\/p>\n\n\n

Preface<\/strong><\/p>\n

OpenStack<\/a> is a cloud computing project to provide an infrastructure as a service (IaaS). It is free open source software released under the terms of the Apache License. The project is managed by the OpenStack<\/a> Foundation, a non-profit corporate entity established in September 2012 to promote OpenStack<\/a> software and its community. More than 200 companies joined the project.
\nHow you can understand that is large project with hundreds of developers, hundreds of thousands lines of code. This topic will make clear development process in OpenStack<\/a> and how to push the code into OpenStack<\/a>.<\/p>\n

Start OpenStack development<\/strong><\/p>\n

1. Signing up for accounts:<\/strong><\/p>\n

The first thing you should do is signing up for LaunchPad<\/a> account. LaunchPad<\/a> is a web application and website that allows users to develop and maintain software, particularly open-source software. Launchpad is developed and maintained by Canonical Ltd. The OpenStack<\/a> project uses LaunchPad<\/a> for mailing list, blueprints, groups, bug tracking. Each OpenStack<\/a> project will have a LaunchPad<\/a> project.  You can create account here<\/a>.<\/p>\n

The next you should signing up in Gerrit<\/a>. Gerrit<\/a> is a free, web-based team software code review tool. Software developers in a team can review each other’s modifications on their source code using a Web browser and approve or reject those changes. It integrates closely with Git, a distributed version control system. To interact with Gerrit<\/a> you need to set SSH key. Because all Gerrit<\/a> commands are using SSH protocol and the host port is 29418. A user can access Gerrit’s<\/a> Git repositories with SSH or HTTP protocols. The user must have registered in Gerrit<\/a> and a public SSH key before any command line commands can be used.<\/p>\n

2. Communication tools:<\/strong> <\/strong><\/p>\n

You should be on OpenStack’s<\/a> mailing list and also on your OpenStack project’s mailing list. It’s necessary to take part in discussions about code development, project design etc. You can subscribe to mailing list according this instruction<\/a>.<\/p>\n

Also for quick answers you can use the IRC channels. It can be questions about how to work with particular methods or about why tests fail. Every week you should take part on IRC meeting of your project where you can discuss some release detail or your own bugs etc. Information about IRC channels you can find here<\/a>.<\/p>\n

3. Setting up development environment:<\/strong><\/p>\n

You can develop on any system you want but the most used and the most comfortable for this aim is Ubuntu. The first thing you need it is Git. In software development, Git is a distributed revision control and source code management (SCM) system with an emphasis on speed. You need Git to pull and push code into Gerrit.<\/p>\n

The next step is DevStack. DevStack’s mission is to provide and maintain tools used for the installation of the central OpenStack services from source (git repository master, or specific branches) suitable for development and operational testing. It also demonstrates and documents examples of configuring and running services as well as command line client usage.<\/p>\n

git clone git:\/\/github.com\/openstack-dev\/devstack.git<\/code>
\ncd devstack; .\/stack.sh<\/code><\/p>\n

Now you can get an Openstack project:<\/p>\n

git clone https:\/\/git.openstack.org\/openstack\/ceilometer<\/code><\/p>\n

This topic not about development of ceilometer so let skip it. Let image that you already have a complete code.
\nYou need install a pip. Pip is a tool for installing and managing Python packages.<\/p>\n

sudo apt-get install python pip<\/code><\/p>\n

Mostly you need pip for install a tox.<\/p>\n

sudo pip install tox<\/code><\/p>\n

OpenStack<\/a> has a lot of projects. For each project, the OpenStack<\/a> Jenkins needs to be able to perform a lot of tasks. If each project has a slightly different way to accomplish those tasks, it makes the management of a consistent testing infrastructure very difficult to deal with. Additionally, because of the high volume of development changes and testing, the testing infrastructure has to be able to pre-cache artifacts that are normally fetched over the internet. To that end, each project should support a consistent interface for driving tests and other necessary tasks.<\/p>\n