In this article, see part two on how to simplify Terraform deployments with Ansible. I will write an Ansible playbook that uses the template module (see Templating with Jinja2) and a little magic of Jinja2 templates to load appropriate variables and configurations for each Terraform environment. Finally, I will use the Terraform CLI to deploy and delete the infrastructure.
In this series:
I am happy to see that many people are enthusiastic about this series and wish to make their IaC applications better with Ansible. What I intend to do is quite simple. I will write an Ansible playbook that uses the template module (see Templating with Jinja2) and a little magic of Jinja2 templates to load appropriate variables and configurations for each Terraform environment. Finally, I will use the Terraform CLI to deploy and delete the infrastructure.
I am assuming that you understand the various components of Terraform well. Please refer to the official Terraform documentation if the terms or concepts sound unfamiliar to you. Please install Terraform CLI and Azure CLI on your Linux system. If you are using Windows, install the dependencies on WSL2.
Although I am going to walk you through the steps of setting up your playbook, here is the source code for quick reference: Source Code
To keep the example short and simple, let’s assume that we want to create an Azure Container Registry within an Azure Resource Group in two environments, viz. staging and production. Execute the following script to set up the relevant directories for the project. Refer to the Ansible Roles section of the previous post to understand the layout of the roles folder created by the command. The folder named tf will contain the Terraform configuration files, and the folder named host_vars will contain the host-specific variables. There are multiple ways of setting the values of the variables used in an Ansible playbook. You can set them through the command line using the flag
-e with the highest precedence or set them through files in the host_vars or group_vars folder. Each file in the host_vars folder is named after the host that it represents. You can read more about adding variables to an Ansible inventory on the Ansible documentation website.
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