You are browsing a read-only backup copy of Wikitech. The primary site can be found at


From Wikitech-static
Revision as of 20:40, 6 July 2022 by imported>JHathaway
Jump to navigation Jump to search

Puppet Bolt supports a variety of uses cases, but one in particular is interesting for our use, masterless Puppet catalog applies. In a masterless apply rather than obtaining the catalog from the puppet master the catalog is compiled directly from the source repository. One advantage of a masterless apply is that it can offer faster feedback on code changes, since you don’t need to commit in order to apply or noop your changes against a destination host, i.e.:

# Edit
$ vi modules/example/manifests/init.pp

# Noop to see changes
$ bolt apply --noop -t

# Commit
$ git commit -a -m 'add example module'

Other projects which support a masterless workflow:

Install Directions

Install Bolt, not currently in Debian unfortunately

$ wget
$ sudo dpkg -i puppet-tools-release-bullseye.deb
$ sudo apt-get update
$ sudo apt-get install puppet-bolt

Delete Bolt’s system module

This module conflicts with our system module, Upstream pull request or rename our module

$ sudo find /opt/puppetlabs/bolt -depth -path '*bolt-modules/system' -exec rm -r '{}' \+

Add Bolt config, labs-private, and supporting modules

$ cat >boltup <<EOM

set -o errexit
set -o nounset

cat >bolt-project.yaml <<EOF
name: wmf
  show_diff: true
hiera-config: 'hiera.yaml'
  - 'private/modules'
  - 'modules'
  - 'vendor_modules'
  - 'bolt/modules'

cat >inventory.yaml <<EOF
  transport: ssh
          # Use our system ruby
          rb: /usr/bin/ruby
      # Switch to root before running puppet
      run-as: root
    # Do not try to install the puppet-agent
    - puppet-agent

# setup hiera
sed -E 's#/etc/puppet/##' modules/puppetmaster/files/production.hiera.yaml >hiera.yaml

# clone repos
if [[ ! -e 'private' ]]; then
    git clone private
mkdir -p bolt/modules
if [[ ! -e 'bolt/modules/nagios_core' ]]; then
    git clone bolt/modules/nagios_core
if [[ ! -e 'bolt/modules/mailalias_core' ]]; then
    git clone bolt/modules/mailalias_core
$ bash boltup


Noop a server

$ bolt apply --noop -t <(cat manifests/*.pp) | tee puppet.out

Look through output

Here is a script to remove items from the output that you don't care about

# Grep out values from a puppet or bolt console output
# Usage: puppet-out-grep Exim Nagios


function join_by {
	local d=${1-} f=${2-}
	if shift 2; then
		printf %s "$f" "${@/#/$d}"

out_ignore+=('Finished' 'Compiled' 'Applied')
out_ignore_service_regex=$(join_by '|' "${out_ignore[@]}")
out_ignore_regex=$(join_by '|' "${out_ignore[@]}")

# Grep for everything except Finished, Compiled, Applied, or refresh (and optional arguments)
grep -E 'Notice|Error' "${puppet_out}" | grep -Ev "${out_ignore_regex}" | sort | uniq

# Do a separate grep for only Service refreshes to highlight them
grep -E 'Service\[.+refresh' "${puppet_out}" | grep -Ev "${out_ignore_service_regex}" | sort | uniq


$ puppet-out-grep Exim Nagios

Outstanding Issues

  1. Bolt's system modules conflicts with our system module, Upstream pull request or rename our module
  2. Bolt does not preserve symlinks on files with recurse and source directories,
  3. PuppetDB queries do not work, nor do exported resources
  4. acme_chief module does not work
  5. Nooping a server with Bolt will take out a Puppet lock, which would block a cron based Puppet run which began after the Bolt run