Infrastructure Team/Puppet

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Sugar Labs Puppet infrastructure.

Modules

Puppet modules configure particular services like git.sugarlabs.org or MySQL but not tied to final configurations, they are being configured from puppetmaster.

All modules are collected as repositories in puppets Gitorious project. Modules might be created from scratch or mirrored from upstream, so, all modules that are used within Sugar Labs are stored in one place. Module repository might have followed branches:

  • master, development version (might be absent if project is mirrorred from upstream),
  • production, version is being used in production,
  • upstream, if it is mirrorred project.

Auto generated documentation.

Master

Only puppetmaster keeps final configuration for all Sugar Labs services. It is being started in a private git repository on Machine/lightwave, which is a high security machine.

Private repository

  • /var/lib/puppet/etc/puppet.git
  • /var/lib/puppet/etc/puppet detached working directory
  • /etc/puppet symlink to detached working directory
  • /var/lib/puppet/etc/puppet.git/config:
[core]
repositoryformatversion = 0
filemode = true
bare = false
sharedRepository = true
logallrefupdates = true
worktree = /etc/puppet

[receive]
denycurrentbranch = ignore

[hooks]
mailinglist = systems-logs@...
emailprefix = "[PUPPET] "
showrev = "git show -C %s; echo"
  • /var/lib/puppet/etc/puppet.git/description:
Sugar Labs Puppet configuration
  • /var/lib/puppet/etc/puppet.git/hooks/post-receive
#!/bin/bash
sh /usr/share/doc/git-core/contrib/hooks/post-receive-email
git checkout -f
for i in $(ls /etc/puppet/manifests/nodes/*.pp); do puppet kick $(basename $i .pp); done

Repository hierarchy

Git repository consists of:

  • manifests/site.pp, main recipe which contain common settings and includes nodes.
  • manifests/services/, recipes that describes final configuration for particular services.
  • manifests/nodes/, puppetized nodes, configuration for hosts that ask puppetmaster.
  • modules/, git submodules with Puppet modules.

Nodes

Hosts that fetch configuration from the puppetmast need puppet >= 2.6 package.

If puppet was installed from gems, it needs to be initially configured:

puppet master --mkusers

To complete configuration, execute:

puppet agent --no-daemonize --onetime --server puppet.sugarlabs.org

Every puppetized host should have particular node file in manifests/nodes/<host-name>.pp on puppetmaster.