Exercise_4.08

Assignment

Move the Project to use GitOps.

• Create two separate environments, production and staging that are in their own namespaces
• Each commit to the main branch should result in deployment to the staging environment
• Each tagged commit results in deployment to the production environment
• In staging the broadcaster just logs all the messages, it does not forward those to any external service
• In staging database is not backed up
• You may assume that secrets are readily applied outside of the ArgoCD
• Bonus: use different repositories for the code and configurations

Solution

Binaries

No changes were made to the binaries.

Repositories

Two new repositories were created for this exercise:

• Configuration repository containing base and patch .yaml files for staging and production environments.
• Source repository containing code for the todo_backend and todo_app, as well as GitHub action that builds the binaries, pushes them to DockerHub and updates kustomization files in the configuration repository.

Manifests

Base

All of the existing manifests were placed in the base directory along with the kustomization.yaml file. The following alterations were introduced to the base manifests from previous exercises:

• BACKEND_HOST environment variable from todo-app-cfgmap was introduced into the cronjob.yaml, since CronJob is run in a separate pod from todo_app.
• spec.ports.port was switched to the default HTTP port 80 in all Service manifests.
• All ports in shared_ingress.yaml were switched to the default HTTP port 80.

Overlays

Two overlay deployments were introduced: prod and staging:

• staging .yaml files are sourced from the base and are deployed when code changes are pushed to the main (trunk) branch of the code repository. Since Exercise 4.06 was skipped due to course deadline, broadcaster is not included in either overlay.
• production overlay contains .yaml files for database backup CronJob and patches todo_app ConfigMap with backend host IP address in the production environment.

Commands

Frontend