Winrm is missing after installing ChefDK
When you install the new version of ChefDK you may get the following error message when you try to run Test Kitchen !!!!!! The `winrm` gem is missing and must be installed or cannot be properly activated. Run `gem install winrm --version '["~> 1.6"]'`…
Berkshelf is missing after installing ChefDK
When you install a new version of ChefDK and try to run Test Kitchen the following error message may appear !!!!!! The `berkshelf' gem is missing and must be installed or cannot be properly activated. Run `gem install berkshelf` or add the following to…
EC2 driver is missing after installing ChefDK
After installing a new version of ChefDK you may get the following error message when you try to run Test Kitchen: Message: Could not load the 'ec2' driver from the load path. Please ensure that your driver is installed as a gem or included in your…
Error in Test Kitchen after installing ChefDK
You may get the following error when you try to run Test Kitchen after installing the latest version of ChefDK: $ kitchen C:/Ruby22/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- dl/import (LoadError) from…
DevOps interview questions
When you are interviewing candidates for a DevOps position this collection of resources can help to ask the right questions. Wide variety of questions on the broad spectrum of tasks needed for the DevOps work.…
Extract data from JSON with Ruby
Chef uses Ruby as the scripting language. If you need to extract data out from a JSON string you can use the following script # Save the JSON values instance_data_drive_config = '{"size":"500","type":"io1","iops":"15000"}' # Parse the JSON to a hash data…
DJI Phantom 4 firmware update stops at 92%
When I update the DJI Phantom 4 firmware with DJI Assistant 2 most of the times the update stops at 92%. If I turn off the DJI Phantom 4 and turn it on again the rear lights blink fast yellow (or fast white), and the DJI Assistant 2 application cannot…
Git configuration
If you use 2-factor authentication in GitHub, generate a 40 character Personal Access Token that you can use as a password to access GitHub repositories. Create a Personal Access Token to use it as password in the Git client Store or update your…
Disable database triggers in Microsoft SQL databases
If you need to temporarily disable triggers in Microsoft SQL databases during database maintenance use the following script --Disable triggers on all tables DECLARE @enable BIT = 0; DECLARE @trigger SYSNAME; DECLARE @table SYSNAME; DECLARE @cmd…
Disable foreign key constraints in Microsoft SQL databases
Databases do not allow the deletion of rows if those are referenced in other tables with the foreign key constraint. You can turn off the validation of foreign keys in Microsoft SQL databases for the duration of the maintenance with the following script.…