Understanding and being comfortable with Terraform state is crucial to mastering it. In this hands-on lab, we will deploy resources using Kubernetes, a container orchestration tool, and see how Terraform maintains a state file to track changes and deploy containers declaratively.
Learning Objectives
Successfully complete this lab by achieving the following learning objectives:
- Check Terraform and Minikube Status
- Check that Terraform is installed and functioning properly using the
terraform versioncommand. - Check that the Kubernetes backedn process
minikubeis running properly using theminikube statuscommand.
- Check that Terraform is installed and functioning properly using the
- Clone Terraform Code and Switch to the Proper Directory
- The Terraform code required for this lab has already been cloned onto the provided VM.
- Switch to the directory where the code is located to perform the remaining tasks:
lab_code/section2-hol1 - View the code in the
main.tffile to see what has been configured for deployment.
- Deploy Terraform Code And Observe the State File
- Initialize the working directory and download the required providers.
- Review the actions that will be performed when code is deployed using the
terraform plancommand. - Deploy the code with the
terraform applycommand. - List the files and verify that the state file was created.
- List all the resources being tracked by the Terraform state file using the
terraform statecommand. - View the replicas being tracked by the Terraform state file and note the number.
- Modify the
replicasattribute in the Terraform code and deploy the code again. - View the replicas being tracked by the Terraform state file and verify that the number has changed.
- Remove the infrastructure you created using the
terraform destroycommand. However, note that Terraform leaves behind aterraform.tfstate.backupfile in case you need to recover to the last deployed Terraform state.
As you make your way through this objective, you may also choose to verify that the number of pods configured in the code were created and that this number changes as you modify the
replicasattribute in your code using thekubectlcommand.
