To get the last characters of a string in Ruby, use the following instructions. If the string is shorter than the selected number of characters, the entire string is returned. a = ‘12345’ b = a[-3..-1] || a puts b Returns 345
Tag Archives: Chef
Remove Policyfile.rb from your Chef cookbook
When you test your cookbook in Chef Test Kitchen and get the following error, delete the “Policyfile.rb” from your Chef cookbook directory. $$$$$$ You must set your run_list in your policyfile instead of kitchen config. The run_list your config will be ignored. $$$$$$ Ignored run_list: [“recipe[…::…]”] Preparing dna.json Exporting cookbook dependencies from Policyfile /tmp/… Error: Invalid …
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Chef Data Bags
Create an encrypted Chef data bag There are secrets in most of the Chef cookbooks that we want to protect. We don’t want to give out user names, passwords and AWS keys. In Chef the best place to hide these secrets is the Encrypted Data Bag. A Data Bag is a JSON file that we can …
Unable to satisfy the following requirements error message in Chef Test Kitchen
When Berkshelf in the Chef Test Kitchen cannot resolve the cookbook dependencies, it displays the following error message during converge: Unable to satisfy the following requirements To help Berks to start a fresh calculation, delete the Berksfile.lock file and enter the following into the command window: berks install
DevOps Engineering part 2. – Create and test your first cookbook in 5 minutes
In the first part of the series, Beginner’s Guide to DevOps Engineering Part 1. we have already installed the DevOps development tools. Create and test your first cookbook in 5 minutes Set up the Chef working folder Create a folder for the Chef development on Mac ~/Chef on Windows C:\Chef In the Chef folder create a sub-folder …
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Beginner’s Guide to DevOps Engineering part 1.
DevOps engineering (Release engineering) is a relatively new profession. There is a very high demand for experienced DevOps engineers, because more and more large corporations want to migrate their data centers into the Cloud. In this series I will introduce you to the tools of the trade through the development of a Chef cookbook. The …
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Chef script stops when it calls a custom resource
When you execute a Chef recipe that calls a custom resource and the execution stops without any output from the custom resource, make sure the custom resource does not reference a misspelled property with the #{PROPERTY_NAME} syntax.
How can I tell if a Chef cookbook is frozen
If a Chef cookbook is “frozen”, the cookbook is protected against accidental overwrite. When someone tries to overwrite it the “Version … of cookbook COOKBOOK_NAME is frozen. Use –force to override” message appears. To check if a Chef cookbook is frozen on the Chef server execute the following command knife cookbook show COOKBOOK_NAME latest | grep …
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Upgrade Chef Client on Windows
If you have already installed Chef Client on a Windows box and want to upgrade to the latest version Open a Command Prompt and run as Administrator, Execute the following command, choco upgrade chef-client After the upgrade close the Command Prompt and open a new one to get the latest environment variables.
REMOTE HOST IDENTIFICATION HAS CHANGED warning when you try to connect to a server with ssh
If you work in the AWS environment and launch and terminate servers frequently the same IP is reused many times. When you try to connect to a new server with SSH and the IP address is already in the known_hosts file you will get the following error message. @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! …