This is a demo project to show how to package Ruby script and Ruby interpreter with chef/Omnibus.

Development env

Development env is our local env, I’m on MacOS.

1. Preparation

   We need to prepare Ruby ( >=2.6 ) in the development environment, and then

    gem install bundler:2.2.3
    gem install omnibus
   

2. Generate Omnibus code template

    omnibus new permutations
    cd omnibus-permutations/
   

3. Setup dependency and package scripts

   • Setup project info in config/projects/
   • Add dependency to config/software/
   • Setup package scripts in package-scripts/
   • Commit code and add a version tag

   More details: https://gitlab.com/icbd/omnibus-permutations.git

Building env

Omnibus determines the platform for which to build an installer based on the platform it is currently running on.

So, we’ll run the build task on a target platform.

In this demo, we use CentOS-8, so also need to install rpmbuild by:

dnf install -y rpm-build

And we also need Git and Ruby ( >=2.6 ) on Building env.

git clone https://gitlab.com/icbd/omnibus-permutations.git
git tag
cd omnibus-permutations

bundle install --binstubs
./bin/omnibus build permutations --log-level debug

After packing, we’ll get RPM file in pkg/:

pkg/
├── permutations-1.0.4+20210415005454-1.el8.x86_64.rpm
├── permutations-1.0.4+20210415005454-1.el8.x86_64.rpm.metadata.json
└── version-manifest.json

Test env

Let’s download that RPM to locale Desktop, and install it on a new clean CentOS-8 VM by Docker.

docker pull centos:8
docker run -v ~/Desktop/pkg/permutations-1.0.4+20210415005454-1.el8.x86_64.rpm:/install-pkg.rpm -it centos:8 bash

rpm -i install-pkg.rpm
source /etc/profile
permutations

Output:

"ruby 2.7.3p183 (2021-04-05 revision 6847ee089d) [x86_64-linux]\n"
[["A", "B", "C"], ["A", "C", "B"], ["B", "A", "C"], ["B", "C", "A"], ["C", "A", "B"], ["C", "B", "A"]]