Puppet/fr

Puppet est un système de gestion de configuration écrit en Ruby. Il peut être utilisé pour automatiser le déploiement de machines.

Installation
Puppet is provided by the package.

Currently, there is no distinction between server and client, so the basic installation procedure is the same for both.

Emerge
First, install Puppet via :

Configuration and setup
Puppet is mainly configured through in an INI-style format. Comments are marked with a hash sign.

The configuration file is separated into several sections, or blocks:


 * [main] contient les réglages qui agissent comme valeurs par défaut dans toutes les parties de Puppet, sauf si vous les redéfinissez dans l'une des sections suivantes :
 * [master] est utilisée pour les réglages qui s'appliquent à Puppetmaster (puppet master), ou l'outil CA (puppet cert)
 * [agent] est utilisé pour des réglages qui s'appliquent à l'agent Puppet (puppet agent)

Une explication plus approfondie, et une liste des blocs suivants utilisés est disponible dans la documentation officielle de Puppet.

Configuration du serveur (Puppetmaster)
La configuration par défaut placée par l'Ebuild dans peut être utilisée en l'état. Pour Puppet 2.7.3, la partie relative au serveur ressemble à ceci :

Setting up the file server
To be able to send files to the clients, the file server has to be configured. This is done in. By default, there are no files being served.

The snippet above sets up a share called files (remember this identifier, as it will need to be referenced later), looking for files in and only available for hosts with an IP from the 192.168.0.0/24 network. Any of the IP addresses, CIDR notation, and host names (including wildcards like ) can be used here. The deny command can be used to explicitly deny access to certain hosts or IP ranges.

Starting the puppetmaster daemon
With the basic configuration as well as an initial file server configuration, we can start the Puppetmaster daemon using its OpenRC init script:

Lors du premier démarrage, Puppet génère un certificat SSL pour l'hôte Puppetmaster et le place dans le répertoire ssldir</tt> configuré plus haut.

Il écoute sur le port 8140/TCP. Assurez-vous qu'il n'y a pas de règles du pare-feu qui bloquent l'accès des clients.

A simple manifest
Manifests, in Puppet's terminology, are the files in which the client configuration is specified. The documentation contains a comprehensive guide about the manifest markup language.

Comme exemple simple, créez un fichier message du jour(motd) sur le client. Sur Puppetmaster créez un fichier dans le partage files</tt> créé précédemment :

Vous devez alors créer le fichier manifeste principal dans le répertoire manifests</tt>. Il est appelé site.pp</tt> :

The default</tt> node (the name for a client) definition is used in case there is no specific node</tt> statement for the host. We use a file</tt> resource and want the file on our clients to contain the same thing as the motd</tt> file in the files</tt> share on the host. If the puppetmaster is only reachable using another host name, adapt the source</tt> URI accordingly.

Client configuration
During the first execution of the Puppet agent, wait for the certificate to be signed by the puppetmaster. To request a certificate, and execute the first configuration run, execute:

Before the client can connect, authorize the certificate request on the server. The client should appear in the list of nodes requesting a certificate:

Now, we grant the request:

The client will check every 60 seconds whether its certificate has already been issued. After that, it continues with the first configuration run:

When this message pops up, all went well. Now check the contents of the file on the client:

OpenRC
Start the puppet agent as a deamon and have it launch on boot:

Systemd
Conversely, when running systemd:

Manually generating certificates
To manually generate a certificate, use the utility. It will place all generated certificates into the ssldir defined directory as set in the puppet configuration and will sign them with the key of the local Puppet Certificate Authority (CA).

An easy case is the generation of a certificate with only one Common Name:

If the certificate has to be valid for multiple host names, use the  parameter and separate the additional host names with a colon:

Cet exemple générera un certificat valide pour les trois noms d'hôte listés.

Refreshing agent certificates
This is the process used to manually refresh agent certificates.


 * 1) (on master)
 * 2) (on agent)
 * 3) * This will cause the Puppet agent to regenerate the CSR with the existing SSL key.
 * 4) * The old certificate is no longer valid, as it was nuked on the master.
 * 5) * When one of the above steps is forgotten, an error will pop up about the certificate mis-matching between agent and master.
 * 6) * To replace the SSL keys (optional):
 * 7) (on agent)
 * 8) * When using auto-signing, no further steps are needed.
 * 9) (on master)
 * 10) Verify that the fingerprint listed in the previous two outputs matches
 * 11) (on master)
 * 12) (on agent)

Managing slots with puppet
While the default portage provider in puppet does not support slots there are puppet modules available which seek to add in this functionality.


 * puppet-portage
 * PortageGT

External resources

 * Upstream website
 * Puppet Wiki