What is Chef?
What is Puppet Labs?
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What are the cons of using Chef?
What tools integrate with Puppet Labs?
For automating deployment or system admin tasks, Shell/Perl are more than enough. Specially Perl one liners, that I use heavily, even to make changes in xml files. But quite often the need is to just check the state of system and run scripts without fear. Thats where I actually needed some scripting language with "state mechanism" associated with it. Salt provided me above similar kind of experience. I tested salt first on a small scenario. Installation of 60 RPMS on a machine. I was pleased that I could achieve that in around 25 lines of code using salt. And eventually I was also able to keep data and code separate. This was another plus point. henceforth I was able to use salt to deploy a large potion Datacenter (apps deployment). I am still working towards orchestration and finding it quite promising. The use of pure python whenever needed to deal with more complex scenario is awesome.
I'm using puppet to configure my servers. This makes it really simple to ensure that I have the same environment. There is a bit of a learning curve, but the repeatability definitely makes it worth the effort. I found puppet to be a little easier to pick up relative to chef, but I've used both. They're both great solutions.
I really like that there are a lot of modules available on the puppet forge that are being actively maintained.
We provision all servers with puppet. We have one central Puppet server which uses puppet modules referenced by a Puppetfile. Those puppet modules are partly from forge and partly self written.
All modules which are self written, have to be tested using rspec-puppet and beaker.
When it comes to provisioning tens to hundreds of servers, you need a tool that can handle the load, as well as being extremely customisable. Fortunately, Salt has held that gauntlet for us consistently through any kind of issue you can throw at it.
We've built something using SaltStack and Debian Linux to help us deploy and administer at scale the servers we provide for our part- and fully-managed hosting customers.
Out custom recipes makes it simple for developers bootstrap process (using vagrant) and that same recipe is also the one that is used to prep instances
Opstax uses puppet for role/profile based configuration management and the distribution of small/static code.
Configures or servers and allows us to be region independent we have 5 regions across the globe.