Continuous deployment from GitLab CI to Kubernetes using Docker-in-Docker
In the last month, I’m working on two different PHP projects here at Facile.it: in the first one, which is new and still in development, I decided to adopt GitLab CI for the build, since we use GitLab CE for our Git repositories; I then created a continuous deployment pipeline for the staging environment, directly to a Kubernetes cluster, leveraging Docker Compose to make the configuration easier.
After, I decided to start migrating a previous, internal project of mine to the same approach, since it’s currently in production with a dumb approach that provokes some downtime during deployments; on the contrary, doing a rolling deployment with Kubernetes is surprisingly easy!