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We will start with a quick explanation of what CI/CD is, and a review of the previous two installments of this tutorial series. Then you can start learning about the CircleCI .config.yml file included in this code repo.
One thing to take note of in this code block is the executor Docker image image: ariv3ra/terraform-gcp:latest. This is an image that I built that has both the Google SDK and Terraform CLI installed. If we were not using this, we would need to add installation steps to this job to install and configure the tools every time. The environment: CLOUDSDK_CORE_PROJECT: cicd-workshops keys are also an important element. This sets the environment variable value needed for the gcloud cli commands we will be executing later.
This job serves as a unit testing function. It helps with identifying errors in the code. If any of these tests fail, the entire pipeline build will fail, and prompt the developers to fix the errors. The goal is for all the tests and jobs to pass. Next, we will create a job that will build a Docker image and push it to the Docker Hub registry.