Puppet setup

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Multiple repository setup

Our puppet environment is split into multiple repos (one repo per module), plus one "root" repository for multi-repository management.

First, clone the base repository, containing the configuration file for myrepos and a README file.

$ git clone ssh://git@forge.softwareheritage.org/diffusion/SENV/puppet-environment.git

Then, use that configuration to clone all the repositories :

$ cd puppet-environment
$ readlink -f .mrconfig >> ~/.mrtrust
$ mr up

(the mr command is in the myrepos Debian package).

All the swh-specific repositories are in swh--prefixed repositories. The other repositories come from other sources and have an upstream remote allowing updates (the origin remote is always on the swh git server).

Our puppet workflow is documented in the README.md file in the puppet-environment repository.

Local puppet manifest diffing with octocatalog-diff

puppet-environment contains the whole scaffolding to be able to use octocatalog-diff on our manifests. This allows for quick(er) local iterations while developing complex puppet manifests.

Dependencies

You need the following packages installed on your machine:

r10k octocatalog-diff puppet

Running

The bin/octocatalog-diff script allows diffing the manifests between two environments (that is, between two branches of the swh-site repository. By default it diffs between production and staging.

Default usage:

bin/octocatalog-diff pergamon

Limitations

Our setup for octocatalog-diff doesn't support exported resources, so you won't see your fancy icinga checks there.

Integration of third party puppet modules

We mirror external repositories to our own forge, to avoid having external dependencies in our deployment.

In the swh-site Puppetfile, we pin the installation of those modules to the highest version (that works with our current puppet/facter version), by using the :ref specifier.

Adding a new external puppet module

In the puppet-environment repository, the bin/import-puppet-module takes care of the following tasks:

  • Getting metadata from the Puppet forge for the module (description, upstream git URL)
  • Cloning the repository
  • Creating a mirror repository on the Software Heritage forge, with the proper permissions and metadata (notably the Sync to GitHub flag)
  • Pushing the clone to the forge
  • Updating the .mrconfig and .gitignore files to know the

To be able to use the script, you need :

  • Be a member of the System Administrators Phabricator group
  • Have the Arcanist API key setup
  • A pair of python dependencies : python3-phabricator and python3-requests (pull them from testing if needed).

Example usage to pull the elastic/elasticsearch module

bin/import-module elastic-elasticsearch
git diff # review changes
git add .mrconfig .gitignore
git commit -m "Add the elastic/elasticsearch module"
git push

Once the module is added, you need to register it in the swh-site Puppetfile.

You should also check in the module metadata whether any dependencies need importing as well, which you should do using the same procedure.

Updating external puppet modules

There's two sides of this coin:

Updating our git clone of external puppet modules

The puppet-environment .mrconfig file has a pullup command which does the right thing.

To update all clones:

mr -j4 pullup

Upgrading external puppet modules

Upgrading external puppet modules happens manually.

In the puppet-environment repository, the bin/check-module-updates script compares the Puppetfile and the local clones and lists the available updates. (depends on ruby r10k).

On a staging branch of the swh-site repository, update the :ref value for the module in the Puppetfile to the latest tag. You can then run octocatalog-diff on a few relevant servers and look for changes.

Deploy work-flow

Semi-automated

  1. you@localhost$ # hack on puppet Git repo
  2. you@localhost$ rake validate
  3. you@localhost$ git commit
  4. you@localhost$ git push
  5. you@localhost$ cd puppet-environment
  6. you@localhost$ bin/deploy-on machine1 machine2...

Remember to pass --apt to bin/deploy-on if freshly uploaded Software Heritage packages are to be deployed. Also, bin/deploy-on --help is your friend.

Manual

  1. you@localhost$ # hack on puppet Git repo
  2. you@localhost$ rake validate
  3. you@localhost$ git commit
  4. you@localhost$ git push
  5. you@pergamon$ sudo swh-puppet-master-deploy
  6. you@machine$ sudo apt-get update # if a new or updated version of a Debian package needs deploying
  7. you@machine$ sudo swh-puppet-test # to test/review changes
  8. you@machine$ sudo swh-puppet-apply # to apply