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Chef Infrastructure Automation Cookbook Second Edition

Chef Infrastructure Automation Cookbook Second Edition

By : Marschall
3.7 (6)
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Chef Infrastructure Automation Cookbook Second Edition

Chef Infrastructure Automation Cookbook Second Edition

3.7 (6)
By: Marschall

Overview of this book

This book is for system engineers and administrators who have a fundamental understanding of information management systems and infrastructure. It helps if you've already played around with Chef; however, this book covers all the important topics you will need to know. If you don't want to dig through a whole book before you can get started, this book is for you, as it features a set of independent recipes you can try out immediately.
Table of Contents (9 chapters)
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8
Index

Building high-availability services using heartbeat


If you want to offer any IP-based service with automatic failover to provide high availability (HA), you can use heartbeat to create an HA cluster.

Heartbeat will run on two or more nodes and ensure that the IP address you chose to make highly available will switch to a working node, if one of them goes down. This way, you have a failover IP address, which is guaranteed to reach a running host, as long as there is one left.

Let's take a look at how to install heartbeat on your nodes and configure it with a failover IP address.

Getting ready

Make sure that you have two machines, named ha1 and ha2, up and running. You can use a Vagrantfile like this or use Chef Provisioning to set them up. You need to replace awo with a short name of your own Chef organization:

def define_node(config, node_name, ip_address=nil, the_recipe=nil)
  config.vm.define node_name do |node|
    node.vm.hostname = node_name.to_s
    node.vm.network :private_network, ip...

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