  Infrastructure-as-code (IaC) is a practice to implement continuous deployment
by allowing management and provisioning of infrastructure through the
definition of machine-readable files and automation around them, rather than
physical hardware configuration or interactive configuration tools. On the one
hand, although IaC represents an ever-increasing widely adopted practice
nowadays, still little is known concerning how to best maintain, speedily
evolve, and continuously improve the code behind the IaC practice in a
measurable fashion. On the other hand, source code measurements are often
computed and analyzed to evaluate the different quality aspects of the software
developed. However, unlike general-purpose programming languages (GPLs), IaC
scripts use domain-specific languages, and metrics used for GPLs may not be
applicable for IaC scripts. This article proposes a catalogue consisting of 46
metrics to identify IaC properties focusing on Ansible, one of the most popular
IaC language to date, and shows how they can be used to analyze IaC scripts.
