Dynamically make configuration chnages in files with puppet

[Malintha Adikari]

Hi,

I am beginner to puppet. I have evaluated puppet and want to use puppet for my project. My project is deployment automation task where I have several different servers with me. There are different types of configuration files in my servers. Let me explain the manully process what I am going to be automated using puppet. When I want to setup deployment manually, think there are 3 different servers in my setup, first I unzip those server packs. Then I make changes in the congifuration file of that each server. Then I run server and if I make configurations correctly , the setup will be done.

Automating: I will store server packs (zip files) in puppet master side. Then I will send request to master for one by one servers. (If there are 3 servers in my setup , I have to send 3 request to puppet master through 3 clients). Those server are deployed inside separate clients. What I have planned is send all my configuration details along with a request to the puppet master. But one problem with that approach is there are lot of different configurations to be done when I configure a pack. Initially I want to know that

1. could we send our configuration details with a request to the master
2. Can we make configurations changes to the files in the packs with data we get with the request from master side

Regards,
Malintha Adikari

[Rich Burroughs]

There are multiple ways to make configuration data available. The pattern we use where I work is to manage the config files, use ERB templates for them, and store the data in Hiera. You could also set custom facts on your node to make data available. The second edition of Pro Puppet has some examples of both of those approaches.

The trickier part with a real-time app deploy is timing the agent runs and ordering the resources properly. You might need to use an orchestration tool like Mcollective to control the agent runs, to get them to happen when you want to, if the timing is critical.

Rich

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