This article explains how to achieve Continuous Deployment of Docker-based software, using either pull-based approaches (external tools such as watchtower and harbormaster), or push-based techniques (deployment from the CI/CD pipeline). I explain the advantages and disadvantages of each approach, and also illustrate how automated testing greatly reduces the risk of unnoticed failed deployments. Introduction When … Read more
This article demonstrates how to use the ArgoCD GitOps controller to deploy applications to a Kubernetes cluster. The definitions/manifests of these applications, such as an Ingress controller, monitoring stack, etc., are stored in GitLab. They are automatically updated by Renovate Bot, which regularly scans your GitLab project for outdated dependencies. A demo project illustrates how … Read more
GitOps is a methodology for Continuous Deployment, where you use Git to store (and track changes of) a declarative definition of your deployment configuration, and have a GitOps tool apply this configuration to your (production, etc.) environment. In this GitOps introduction you will learn how GitOps is defined. By looking at several examples, you will … Read more