Configuration and change management with Bcfg2
Connections
A database lets you retrieve configuration information from more data sources. For example, you could automatically generate the DHCP, DNS, and NIS configuration data from a source such as a directory service. The example in Listing 5 shows how TCheetah on Debian configures the network interfaces in /etc/network/interfaces on the basis of data from a PostgreSQL database.
Listing 5
TCheetah-Configured network/interfaces
Services
Configurations do not just apply to file entries. System services must be configured to reflect the runlevels. The Service generator reads the administrative information in Svcmgr/services.xml to discover how to configure, say, the NTP service.
To do so, the server references the service referred to as <service name= 'ntpd' /> in the matching bundle.
Then, services.xml is used to specify whether or not the client should start the service:
<Services priority='0'> <Service name='ntpd' status='on' /> </Services>
The generator converts these details to tangible configurations and sends them to the client, which then applies distribution-specific methods to enable or disable the service.
Packages
Bcfg2 does not replace the package manager, but it can have the effect of shifting more control from the package manager to the system administrator, who can use Bcfg2 to specify which version of which individual package the tool installs. XML files manage information about the available packages and synchronize the details with the installation server package selection. Multiple installation servers allow administrators to assign different priorities – for example, for security updates.
The Bcfg2 client compares global and local package versions and upgrades or downgrades accordingly. Administrators can freeze special versions by assigning them the highest priority.
Other generators configure directories, symlinks, and many other element types. Some more experienced administrators will appreciate the ability to use plugins to bind Python functions to the generators provided with the Bcfg2 distribution.
Buy this article as PDF
(incl. VAT)
Buy Linux Magazine
Subscribe to our Linux Newsletters
Find Linux and Open Source Jobs
Subscribe to our ADMIN Newsletters
Support Our Work
Linux Magazine content is made possible with support from readers like you. Please consider contributing when you’ve found an article to be beneficial.
News
-
Juno Computers Launches Another Linux Laptop
If you're looking for a powerhouse laptop that runs Ubuntu, the Juno Computers Neptune 17 v6 should be on your radar.
-
ZorinOS 17.1 Released, Includes Improved Windows App Support
If you need or desire to run Windows applications on Linux, there's one distribution intent on making that easier for you and its new release further improves that feature.
-
Linux Market Share Surpasses 4% for the First Time
Look out Windows and macOS, Linux is on the rise and has even topped ChromeOS to become the fourth most widely used OS around the globe.
-
KDE’s Plasma 6 Officially Available
KDE’s Plasma 6.0 "Megarelease" has happened, and it's brimming with new features, polish, and performance.
-
Latest Version of Tails Unleashed
Tails 6.0 is based on Debian 12 and includes GNOME 43.
-
KDE Announces New Slimbook V with Plenty of Power and KDE’s Plasma 6
If you're a fan of KDE Plasma, you'll be thrilled to hear they've announced a new Slimbook with an AMD CPU and the latest version of KDE Plasma desktop.
-
Monthly Sponsorship Includes Early Access to elementary OS 8
If you want to get a glimpse of what's in the pipeline for elementary OS 8, just set up a monthly sponsorship to help fund its continued existence.
-
DebConf24 to be Held in South Korea
Busan will be the location of the latest DebConf running July 28 through August 4
-
Fedora Unleashes Atomic Desktops
Fedora has combined its solid distribution with rpm-ostree system to make it possible to deliver a new family of Fedora spins, called Fedora Atomic Desktops.
-
Bootloader Vulnerability Affects Nearly All Linux Distributions
The developers of shim have released a version to fix numerous security flaws, including one that could enable remote control execution of malicious code under certain circumstances.