You probably know about the def.json Augments file. However, are you familiar with host_specific.json? The def.json Augments file is read, if it’s adjacent to the policy entry. As such, this file is generally distributed as part of the policy set. Its settings apply to all hosts that receive …
You have probably heard of cowsay, but have you heard of agentsay? Just in case you haven’t seen the greatness of cowsay, here is an example: command cowsay "Gee, I wish I was a cf-agent!" output _______________________________ < Gee, I wish I was a cf-agent! > …
Did you know that CFEngine can simply warn about something not being in the desired state? Traditionally with CFEngine, you define your desired state and CFEngine works towards making that happen. Sometimes you might not want CFEngine to take action and instead warn that a given promise wants to …
The rather serious recent OpenSSH vulnerability CVE-2024-6387 could affect as many as 14 million server instances exposed on the internet. Let’s make it easy to examine your infrastructure and see if you need to do any upgrades or mitigations. On the back of my CFEngine T-shirt it says: Know …
Who cares about that promise? Today, I want to highlight one of the lightweight knowledge management features in CFEngine. That is, Promisees, also known as Stakeholders. Promisees are references to things that might care about a specific promise. And they can be attached to any promise. Let’s …
Did you know CFEngine has Macros? They were first introduced in CFEngine 3.7 (back in 2015), and more have been introduced since then. Macros are convenient for preventing the parsing of a section of the policy. It is handy for protecting older binaries from getting tripped up on newer syntax the …
Ever want to manage subvalues in a configuration file? In episode 39 we talk about using field_edits in edit_line bundles. Cody and Craig join Nick as he prototypes and iterates on some policy showing how to manage subvalues in KEY = quoted values. A question raised during one of our recent post …
This is a heads up to anyone upgrading to CFEngine 3.24.0 or newer versions, about a small change that can be considered a breaking change. In CFEngine versions prior to 3.24.0, the CFEngine roles inventory attribute showed up in Mission Portal with the value policy_server for the hub, and as (Not …
Today, we are pleased to announce the release of CFEngine 3.24.0! The code word for this release is consistency. This release also marks an important event, the beginning of the 3.24 LTS series, which will be supported for 3 years. Several new features have been added since the release of CFEngine …
Do you know how to quickly see what variables and classes are defined? Often, while developing CFEngine policy it’s convenient to emit a variable value or a report based on the presence of a class. For example: bundle agent main { reports: "Unqualified hostname = …
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