Learning Puppet 4: A Guide to Configuration Management and - download pdf or read online

By Jo Rhett

If you’re a method administrator, developer, or website reliability engineer chargeable for dealing with enormous quantities or perhaps millions of nodes on your community, the Puppet configuration administration software will make your task plenty more straightforward. This useful consultant exhibits you what Puppet does, the way it works, and the way it may possibly offer major worth on your organization.

Through hands-on tutorials, DevOps engineer Jo Rhett demonstrates how Puppet manages complicated and allotted elements to make sure provider availability. You’ll methods to safe configuration consistency throughout servers, consumers, your router, or even that desktop on your pocket through constructing your personal checking out setting.

Learn precisely what Puppet is, why it was once created, and what difficulties it solves
• Tailor Puppet in your infrastructure with a layout that meets your particular needs
• Write declarative Puppet regulations to supply consistency on your structures
• construct, try out, and post your personal Puppet modules
• deal with community units equivalent to routers and switches with puppet machine and built-in Puppet brokers
• Scale Puppet servers for top availability and function
• discover net dashboards and orchestration instruments that complement and supplement Puppet

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Extra info for Learning Puppet 4: A Guide to Configuration Management and Automation

Example text

Why Declarative When analyzing hand-built automation systems, you’ll invariably find commands such as the following: $ echo "param: newvalue" >> configuration-file This command appends a new parameter and value to a configuration file. This works properly the first time you run it. However, if the same operation is run again, the file has the value twice. This isn’t a desirable effect in configuration management. To avoid this, you’d have to write code that checks the file for the configuration parameter and its current value, and then makes any necessary changes.

Don’t skimp. Someone on your team who is good at promoting and guiding others should be fully trained on Agile processes. Get the people responsible for creating change out to conferences where they can learn from others’ experiences, such as DevOps Days, PuppetConf, and O’Reilly’s Velocity conference. That’s not an obligatory push of the publisher’s conference. Many people consider John Allspaw’s “10+ Deploys Per Day: Dev and Ops Cooperation,” which was presen‐ ted at Velocity 2009, to be a founding cornerstone of the DevOps movement.

For Mac users, I recommend the TextWrangler and TextMate editors. The built-in TextEdit editor is minimally sufficient for Unix format files, but cannot handle files in Windows format properly. If you are already a fan of the Unix editor Vim, you can find a GUI version of it at GVim or MacVim. Vim can safely read and write files in both formats. If you have experience with the Eclipse IDE, the workspace editor can safely read, write, and convert upon request files in both Unix and Windows formats.

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