Puppet/tr

Puppet Ruby ile yazılmış bir konfigürasyon yönetimi sistemidir. Sistemlerinize uygulama yükleme/güncelleme işlemi sırasında yardımcı olur.

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:


 * contains settings that act as a default for all parts of Puppet, unless overridden by settings in any of the following sections:
 * is used for settings applying to the Puppetmaster, or CA tool
 * is used for settings applying to the Puppet agent

Daha derin şekilde bilgiyi (diğer olası yapılandırma bölümleri ile birlikte) resmi Puppet dökümanlarında bulabilirsiniz. Ayrıca tüm geçerli değişkenleri de inceleyebilirsiniz. Tabi ki bazıları yalnızca sunucu veya yalnızca istemci için işe yaramakta.

Sunucu (Puppetmaster) Yapılandırması
Ebuild'den kurulumda öntanımlı olarak gelen dosyası olduğu gibi kullanılabilir. Puppet 2.7.3'de sunucu ile ilgili bölümler şöyle görülmekte:

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:

During the first start, Puppet generates an SSL certificate for the Puppetmaster host and places it into the directory configured through the ssldir variable, as configured above.

It listens on Port, make sure that there are no firewall rules obstructing access from the 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.

Basit bir örnek olarak istemcide bir günün mesajı (motd) dosyası oluşturalım. Puppetmaster üzerinde önceden tanımladığımız files paylaşımının dizini içinde bir dosya oluşturalım:

Then, we have to create the main manifest file in the directory. It is called site.pp:

The default node (the name for a client) definition is used in case there is no specific node statement for the host. We use a file resource and want the file on our clients to contain the same thing as the motd 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:

Bu şekilde üretilen bir sertifika belirtilen üç alan adı için de geçerli olacaktır.

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 support slots there are puppet modules available which also have this functionality.

For instance, with version 4.6.0 and higher, and/or, the slot functionality is supported like to:

Additional modules are:
 * puppet-portage
 * PortageGT

External resources

 * Upstream website
 * Puppet Wiki