Posts Tagged ‘ continuous integration

Testing Chef cookbooks on travis-ci / with chef-zero

If you are using your own Chef cookbooks you certainly have some sort of tests for them. Likely running test-kitchen with docker or vagrant driver. That setup works perfectly fine locally or on a self-hosted Jenkins server. However building them on public CI platforms like travis-ci or is not possible like that. Caused by their virtualization technology, we cant use test-kitchen with docker or vagrant driver there.

What people usually do to solve this: Use a cloud driver like EC2, Cloudstack, Rackspace so travis-ci will spin up a VM there. However I found this very clunky. This require additional accounts and costs with a Cloud provider.

So what I did is mimicing how the chef-zero provisioner for test-kitchen works as seen here
It basically boils down to installing Chef, copying all dependency cookbooks in place along with some configs and then running chef-client with chef-zero.

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Getting RPM built by Koji into YUM-able repo

By following my article series about Fedoras RPM build system Koji, you should by now have a fully working setup that even builds RPMs from Git.
However, by design, the built RPMs cant be directly used as a yum repo. They need to be transformed first. Therefore the tool “mash” exists.
Luckily setting up mash is easy compared to Koji itself.

yum install mash
# create a storage path, this can also be a network mount
mkdir -p /mnt/custom-repo/{mash,rpm}
ln -s /mnt/custom-repo/mash/centos6-release/ /mnt/custom-repo/rpm/centos6

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Building RPM from Git with Koji

If you have followed my other articles about Koji, you should have a fully working setup now. However its not very handy to only build local SRPM.
Fortunately Koji can build RPMs by spec-files and Makefiles which it gets from a Git repo or other SCM. Read on to learn how you get that going.

In /etc/kojid/kojid.conf*:no

;using any other command instead of "make sources". Example showing "fedpkg sources"

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Continuous Lifecycle 2013: Talk submitted

Continuous Lifecycle 2013:  Your contribution

I just submitted my talk for the Call for Papers for “continuous Lifecycle 2013” conference in November. Great topics, have a look here

So fingers crossed. Would be a great opportunity to speak there and also come back to Karlsruhe where I used to live for 6 years. Meet up with friends and just have a good time.

Koji RPM Build System Configuration and Usage

In the previous short article series I’ve shown you how to install Koji and all its components like Kojid, Kojira, Koji-Hub. However to fully use it we need to do some initial configuration that can only be persisted for a fresh install by a early DB Backup, I’ll remind you of that later.

To understand what we are doing here you need to know a bit more about Kojis philosophy:

Koji uses Tags to identify and mark various stages in the RPM building workflow. Some tags are logically linked together to the same flow, like building for a certain target distribution, e.g. CentOS6. We will call this target tag dist-centos6. But you can maintain multiple distribution-builds on the same Koji instance, just add more tags then according to this article.

We also need a tag that is used for builds and inherits the build target. We call this tag dist-centos6-build
Koji is building RPMs in a chroot with the mock tool. It also installs basic packages to those buildroots from the virtual yum package groups named build and srpm-build. So we need to tell Koji which packages we need. You can extend that list to your needs but choose wise: These packages are pulled in for every build then.
Also, Koji needs to know where to find/pull packages from, therefore we add external repositories, the base repo as the very first !!

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Koji RPM Build System Installation Part 4

Lets see what we have running so far by the last articles of this series:

  • Postgresql DB
  • Koji-Hub
  • Koji CLI
  • Koji-Web

Thats all nice but useless unless we add something that actually does all the work, the actual RPM building…


Kojid, also called Koji-Builder, is the service that takes care of building your SRPM and RPMs. You can have dozens of builders, each on their own host, if you need to build alot of RPM. Fedoras own Koji instance is using around 50-60 build hosts ! So lets get started

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Git-Flow | How it’s used and why you should

What is Git-Flow about?

Git-Flow is a workflow for using Git in a way that makes continuous software development and lifecycle much better. It was first proposed by Vincent Driessen in early 2010. He then released some scripts that integrate into the git command. However many people / companies still havent heard of it.

It incorporates the typical software lifecycle steps: feature development, releasing a version, hotfixing.
Internally, its “just” a branching model, so it works with every git repo be it only local or with the big remote ones like Github, Gitorious.

Git-Flow concept

At first Git-Flow might be a bit confusing, but once you get the hang of it you won’t want to develop without it anymore. Have a look at this image while you are reading the explanation beneath and all should come clear.

Git branching model

Git branching model

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Koji RPM Build System Installation Part 3

If you followed my previous articles you should by now have a rudimentary Koji system running.

Lets now proceed and add more components.


As the name suggests, Koji-Web is a webinterface to Koji. It lets you view all your builds, packages, rpms, tasks and other useful info. However you cannot control everything about Koji with it. Its nonetheless good to have. So lets go:

yum install koji-web mod_ssl

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Koji RPM Build System Installation Part 2

So in Part1 we started with setting up the SSL certificates. Now we are going deeper

Database Setup

Start with installing postgresql and setting up Koji users and schema.

yum install postgresql-server koji
service postgresql initdb
service postgresql start
useradd koji;passwd -d koji
su postgres;createuser koji;createdb -O koji koji
su koji; psql koji koji < /usr/share/doc/koji*/docs/schema.sql

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Koji RPM Build System Installation Part 1


So you decided to also take a shot at Koji, congrats. You won’t regret it.

At first, its helpful to understand the inner architecture of Koji for knowing when to look in which config files:

koji architecture

Koji architecture

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