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Puppet control-repo 
to the next level

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An overview of Puppet control repos and a presentation of example42 control-repo

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Puppet control-repo 
to the next level

  1. 1. Puppet control-repo
 to the next level (an opinionated big fat control-repo) Alessandro Franceschi @alvagante
  2. 2. A control-repo contains a Puppet environment A magic word appeared somewhere sometime giving shape to a common pattern A single place containing all the our Puppet manifests, modules and, generally, Hiera data Each environment is a directory under
 /etc/puppetlabs/code/environments/ The default environment is called production
 /etc/puppetlabs/code/environments/production Puppet environments are typically managed in git control- repos.
  3. 3. Control repo components • A minimal control-repo contains:
 manifest directory for common manifests
 modules directory for modules
 hieradata directory for Hiera data, if used
 Puppetfile with list of external modules to use
 environment.conf to configure the environment • Puppetfile is used by r10k or librarian-puppet to deploy Puppet modules from external sources (git repo or Modules Forge) • Find an essential skeleton here:
 https://github.com/puppetlabs/control-repo 

  4. 4. example42 big fat control-repo An opinionated control-repo where more is better than less, when you have the choice to remove, featuring: A relevant amount of customisable profiles and tools with sample Hiera data to configure common applications Multiple configurable Vagrant environments Integration with Docker for VM testing and images building Integrations with Fabric and GitLab Fits any setup: Puppet Enterprise, Foreman, standard OSS Find it here:
 https://github.com/example42/control-repo
  5. 5. 3 + 1 ways to start • Just start to play around • Fork and customise for your project
 
 • Start a new project from scratch,
 cherry picking what you want to keep • Just look around for inspiration or cherry picking git clone https://github.com/example42/control-repo cd control-repo
 bin/setup_puppet.sh # Installs required gems and runs r10k git clone https://github.com/example42/control-repo cd control-repo bin/git_setup_new_repo.sh
 # vi files_to_adapt ; rm files to remove ; ... # Any change you may want git commit -a -m "Repo based on https://github.com/example42/control-repo"
 git remote add origin git@github.com:<yourname>/puppet-control-repo.git git push -u origin --all git clone https://github.com/<yourname>/control-repo cd control-repo git remote add upstream https://github.com/example42/control-repo
 bin/setup_puppet.sh
  6. 6. Setup The control repo requires Puppet 4, if not present: bin/install_puppet.sh If you already have r10k and possibly the other needed gems (hiera-eyaml, deep_merge) then just run: r10k puppetfile install -v To install the above gems and then run r10k you can use this script: bin/setup_puppet.sh Vagrant, Docker, Fabric are optional, suggested, dependencies. You can install them, with: bin/setup.sh Install local git hooks with useful Puppet checks bin/git_install_hooks.sh
 vi .git/hooks/commit_hooks/config.cfg
  7. 7. Fabric integration Optional integration with fabric.
 Install it with any of these commands ;-> pip install fabric # If you have already pip installed
 tp install fabric # If you have tp installed
 bin/setup.sh # Use the main setup script Tasks are defined in the *.py files on the base dir. Show them with: fab -l The ones marked as [local] are run on the local host
 The [remote] ones are supposed to be run on remote nodes, specified as follows (or via the other ways to set nodes where to run Fabric tasks): fab -H node1,node2 puppet.install
  8. 8. demo
  9. 9. Explore • Give a look to the following files and directories: 
 # The first manifest parsed by Puppet server
 manifests/site.pp # r10k Puppetfile and directory for public modules
 Puppetfile modules/ # Local tools and profiles for common use cases site/profiles site/tools # Sample Hiera configuration file and data directory hiera.yaml hieradata/ # Directory with different Vagrant environments vagrant/environments 
 # Support files to build docker images
 docker/ # Blueprint directory for modules 
 skeleton/ # Tools for various tasks (used by Fabric, used in devel/testing/ci phases bin/
  10. 10. Test local code with Vagrant • Multiple Vagrant environments 
 ls -l vagrant/environments/ • Each one customisable via config.yaml 
 cd vagrant/environments/ostest
 vi config.yaml • Local control-repo code and data can, by default, be tested on Vagrant VMs both in puppet apply and agent mode 
 cd vagrant/environments/puppetinfra
 vagrant status
 vagrant up dev-local-puppet-01
 vagrant ssh dev-local-puppet-01
 vm $ sudo su -
 vm # /etc/puppetlabs/code/environments/production/bin/papply.sh vm # puppet agent -t
  11. 11. Customising Vagrant environments Single roles can be tested in relevant VMs: fab vagrant.up:vm=dev-local-log-01 fab vagrant.provision:vm=dev-local-log-01 All Linux servers use this class of common resources: # site/profile/manifests/base/linux.pp # profile::base::linux common settings are in: hieradata/common.yaml Each role may have specific Hiera settings in: # hieradata/role/$role.yaml
 # IE. For "log" specific Hiera data is in hieradata/role/log.yaml
  12. 12. Puppet Enterprise - Gitlab environment Dedicated Vagrant environment with:
 - Puppet Enterprise AIO is installed on a VM
 - GitLab is installed on another VM
 - A third VM with gitlab CI runner is added The full setup involves:
 - Configuration of Code Manager to automatically deploy Puppet code on PE
 - Configuration of GitLab
 - Configuration of GitLab runners to run Puppet tests Currently setup is not completely automated.
 For details check vagrant/environments/pe_demo/README.md
  13. 13. Play with Docker Test a role on a given OS: fab docker.test_role:log,ubuntu-14.04
 fab docker.test_role:git # Available images: ubuntu-12.04, ubuntu-14.04, ubuntu-14.06
 # centos-7, debian-7, debian-8, alpine-3.3 Build an image based on a role (with Rocker) (WIP): fab docker.rocker_build_role:ansible,ubuntu-14.04 Build via tp multiple OS images based on a role (WIP): fab docker.tp_build_role:ansible
  14. 14. Some design choices (all changeable) • Profiles loaded via hiera_include • Hiera driven noop mode • Wide usage of Tiny Puppet in some profiles • OS based base profile with class indirection • Hiera eyaml backend. Hieradata in control-repo • Separated public and site dirs. Site modules in control-repo • More is better than less (because you can always remove what you don't want)
  15. 15. Where to customise • The control-repo is just the starting point for a greenfield modern Puppet setup • Define a way to set your nodes' roles and node defining variables (the ones used in hiera.yaml) • Select the public modules to use and add them to Puppetfile • Write local profiles in site/profile/manifests • Review hiera.yaml logic and customise data in hieradata/ • Customise your Vagrant environments • Customise the skeleton to use for custom modules
  16. 16. Mostly welcomed contributions • Use or have ideas from it and tell us what you think • Feedback, critics and suggestions are really needed to guide our evolutions • If you have good tools or profiles, valid for general use cases, PR them. More is better than less... • Talk with us @example42 @alvagante
  17. 17. enough Puppet ramblings Thank You
for all the fish Alessandro Franceschi @alvagante

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