Change the AWS account to launch instances with Chef Test Kitchen

The Chef SDK contains Test Kitchen, that can launch server instances to test your Chef cookbooks. Test Kitchen uses the “chef_zero” provisioner to use your workstation as the virtual Chef server. To switch Test Kitchen to launch instances in another AWS account In the .kitchen.yml file update the availability_zone subnet_id aws_ssh_key_id (if different in each account) […]

Test Chef cookbooks locally on a virtual workstation

When you use a virtual machine to write your Chef cookbooks you may want to test them locally with Vagrant. This nested virtual machine cannot use a 64 bit operating system, because to run a 64 bit virtual machine, the host computer’s CPU has to provide the CPU Extensions. Currently only physical CPUs can provide […]

Ruby tips and tricks

Bang methods (Exclamation point at the end of the method name) There are methods that have a permanent or dangerous version. The exclamation point designates to use the dangerous version of the method. String manipulation The bang versions of the string manipulation methods (with the exclamation point), modify the string variable in place. Some of these methods […]

Migrating from Chef Client version 12 to 13

Chef is under heavy development, every new major version introduces new features, and many times changes, deprecates, or removes some commands or options. Chef Client 13 introduced a new way of handling reboots and Windows scheduled tasks. reboot resource In Chef version 12, the “:reboot_now” action continued the execution of the Chef cookbook but after […]

Calling a resource in the Chef recipe

During major Chef Client version upgrades, some instructions need to be changed based on the version of the Chef Client. For example, upgrading from version 12 to version 13, the “windows_task” resource requires a different action to make changes to existing scheduled tasks. To call a Chef resource in your cookbook, you need another resource to […]

Make decisions in your Chef recipe based on the version of the Chef Client

There are times when you have to make a decision in your Chef recipe, based on the version of the Chef Client installed on the node. There are two ways to get the version of the installed Chef Client: Chef::VERSION node[‘chef_packages’][‘chef’][‘version’] To make a decision based on the installed Chef Client version if ( Chef::VERSION.to_f […]