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Ansible is very easy to customize. It doesn't force you to use a language with which you are unfamiliar. Instead, all commands are packaged into YAML modules which are called playbooks. So as long as you use a programming language that can output JSON, you are able to customize it. See More
Despite being written and taking good advantage of the python environment, Ansible offers no python api for programming, and does not make it possible to follow best practices for writing custom Ansible modules. See More
Ansible has a Web UI in the form of AnsibleWorks AWX which unfortunately does not tie directly into the CLI. So configuration elements present in the CLI can not appear in the UI unless a sync pass is run. Although the Web UI is helpful and functional, it's still not as complete feature-wise as the CLI. See More
Non-expert users can define parameters in a central interface, and Rudder will automatically make sure that IT services are installed, configured, running and in good health. All actions (checks, warnings, fixed errors…) are reported upon immediately in the user interface, keeping drift from nominal behaviour low. See More
Apart the agent on proprietary OS (AIX, Windows, ...) , Rudder is an open source and free software. This means that the code source is available on Github for every part of Rudder (Rudder webapp, and every other Normation repository). This also means that packages for a wide range of distributions are released and available to download freely. See More
You define the state the server should be in and Puppet transforms it that state. This is opposed to explicitly declaring a list of actions to be performed. If a developer wants more flexibility and control there's always the option of falling back to explicitly running commands but that's discouraged. See More
Due to it's out of order execution you can easily get into race condition between different modules. You have to be very careful declaring pre-requisites for the tasks so they don't step on top of each other. On the other hand when you get this lets you deploy things much faster than straight line execution tools See More
Modules and configurations are written in a specific language based on Ruby or in Ruby itself. So in order to be able to create custom configuration and modules you need a solid knowledge of Ruby. Although it's fair to mention that there are many modules already available for every use-case. See More
Salt works around a Salt master which has multiple agents (Salt minions) that have a persistent connection to the master. Because of this persistent connection, commands to the master are fast to reach the minions. Furthermore, the minions also save various data to the cache in order to make execution faster. When compared against other tools to run the same actions, Salt almost always completes the actions in significantly less time. See More
Chef has a relatively large community. One of the reasons for it is the fact that it's a pretty old and mature tool. Chef, originally released in 2009, is a more mature product. Being popular and with a large and dedicated community means that Chef has lots and lots of resources and guides from third party sources out there for beginners to pick up. Not only that, there are also many plugins and configuration recipes made by the community. See More
Chef was released in 2009, which is relatively a long time ago for software. Since then it has been through several versions and many bug fixes and tests. All of this can make Chef more appealing to teams who are looking for stability and maturity, which are things that Chef brings on the table. See More
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