Puppet manifests used to provision the main GOV.UK web stack
- Create MySQL database and user
- Dependency management
- Nagios checks
- Process supervision
- Puppet Class Assignment
- Things that should not be in Puppet
This repository contains the puppet modules and manifests for GOV.UK.
In order to run/test the Puppet manifests you will need Ruby 1.9.x and Bundler.
Please familiarise yourself with our Puppet standards before contributing to this repository:
rake spec and
rake lint to run the tests and lint before checking in.
All modules from librarian-puppet are cached in this repo under
vendor/puppet/ in order to ensure that third-party code doesn’t change
underneath us, protect us from downtime, and improve build times.
If you’re using this repo for the first time or the contents of
Puppetfile[.lock] have recently changed then you’ll
need to run:
$ bundle install $ bundle exec rake librarian:install
Please avoid using
librarian-puppet directly because it’s not very good at
respecting or maintaining its own config file.
Running these commands will often be the solution to Puppet errors about unknown classes or functions such as:
Unknown function validate_bool at …
Could not find class apt for …
Puppet::Parser::AST::Resource failed with error ArgumentError: Invalid resource type apt::source …
It may affect errors relating to classes you have not modified when running spec tests after a rebase.
This should also fix errors while trying to run
govuk_puppet, of the form:
chown: changing ownership of '/home/vagrant/.puppet/[…]': Operation not permitted
If you need to add a new module to the
Puppetfile then you will need to
run the following to install it and update the cache:
$ bundle exec rake librarian:package
If you need to update an existing module to a newer version, you’ll need to run the following:
$ bundle exec rake 'librarian:update[alphagov/tune_ext]'
Afterwards you should commit the
Puppetfile.lock and any new
vendor/puppet/. If updating a module then you will need to
manually delete the old tarball from the cache directory.
NB: There should never be any changes to
Assuming that your dependencies are installed, run all the tests:
$ bundle exec rake
The module tests are located in
modules/<module>/spec. See the RSpec
Puppet documentation for more
details. The specs are run in parallel by default.
Puppet-lint is a tool that checks various syntax and style rules common to well written Puppet code. It can be run with:
$ bundle exec rake lint
This outputs a set of errors or warnings that should be fixed. See the Puppet Style Guide for more information.
You can run the tests for a specific module or modules by setting an
mods for the rake task, e.g.
$ bundle exec rake mods=nginx,varnish
manifests/ directory is considered one module called
$ bundle exec rake mods=manifests,govuk
This repo uses pre-commit for managing its pre- commit hooks. This is available via brew:
brew install pre-commit
The pre-commit hooks are configured in the .pre-commit-config.yaml file in the root of this repo. To make the pre-commit hooks work you first need to install the pre-commit shim in your local .git/hooks directory:
This will run hooks configured in
.pre-commit-config.yaml when you run a
git commit and will pass each hook the list of files staged as part of the
commit. You can test the hooks by doing:
You can also run the hooks on all files to test the status of the entire repo. This might be useful, for example, as part of a PR builder job:
pre-commit run --all-files
Some issues that span multiple classes or modules may not be picked up unit
testing. Duplicate resources and mislabelled dependencies are such examples.
To catch these, all available
govuk::node classes can be exercised with:
$ bundle exec rake spec:nodes
Compiling node complete node catalogs takes quite a long time, so you may
wish to restrict it to certain classes of node by setting the environment
classes for the rake task, e.g.
$ bundle exec rake spec:nodes classes=frontend,backend
During spec tests
spec/fixtures/hiera/hiera.yaml is used to configure hieradata which only uses
spec/fixtures/hieradata/common.yaml for its values (i.e. nothing from
During node tests the hieradata uses the
Each test suite’s results are followed by a summary of how many resources that suite covers, how many the tests touch and the coverage as a percentage. e.g.
Total resources: 175 Touched resources: 36 Resource coverage: 20.57%
A list of untouched resources can be gained by setting the
FULL_COVERAGE_REPORT environment variable before running the tests:
FULL_COVERAGE_REPORT=true bundle exec rake spec
Warning Given the number of modules that have limited tests this will produce a very large amount of output unless the tests are scoped.
Rspec Basic Mode
It is sometimes useful to have access to the normal RSpec Rake task. This exposes the
SPEC_OPTS environment variables that mean you can set the test specification and RSpec options respectively. This gives finer grain control when it is needed. e.g.
$ bundle exec rake rspec_basic_mode SPEC="./modules/collectd/spec/classes/collectd__package_spec.rb:7" SPEC_OPTS="-c"
runs the single test at line 7 of
collectd__package_spec.rb with colour mode enabled.
Warning using this option disables parallel running of tests and the
mod arguments will not work.
You will need an up-to-date checkout of the private
repository for node definitions.
It is recommended that you use Vagrant > 1.4 from a binary/system install.
alphagov/gds-boxen can set this up for you.
You need only bring up the subset of nodes that you’re working on. For example, to bring up a frontend and backend:
vagrant up frontend-1.frontend backend-1.backend
Vagrant will run the Puppet provisioner against the node when it boots up.
Nodes should look almost identical to that of our real
production/staging/preview environments, including network addresses. To
access a node’s services like HTTP/HTTPS you can point your
hosts file to
the host-only IP address (eth1).
Physical attributes like
num_cores will be ignored because
they don’t scale appropriately to local VMs, but can still be customised as
Node definitions can be overridden with a
nodes.local.yaml file in this
directory. This is merged on top of all other node
definitions. The following keys are currently available for customisation:
box_distUbuntu distribution. Currently “trusty”.
box_versionInternal version number of the GDS basebox.
memoryAmount of RAM. Default is “384”.
ipIP address for hostonly networking. Currently all subnets are /16.
className of the Puppet class/role.
For example to increase the amount of RAM on a PuppetMaster:
--- puppetmaster-1.management: memory: 768
Some errors that you might encounter..
NFS failed mounts
[frontend-1.frontend] Mounting NFS shared folders... Mounting NFS shared folders failed. This is most often caused by the NFS client software not being installed on the guest machine. Please verify that the NFS client software is properly installed, and consult any resources specific to the linux distro you're using for more information on how to do this.
This seems to be caused by a combination of OSX, VirtualBox, and Cisco
AnyConnect. Try temporarily disconnecting from the VPN when bringing up a
new node. You can also set
VAGRANT_GOVUK_NFS=no as an environment variable to
disable the use of NFS. This is less performant but fine for checking puppet