With dive, an interactive console tool written in Golang, you can explore through the different layers of a docker image. What are docker layers Every docker image contains the information of what changed in comparison to its parent image. All images have a parent one, except those that derive from scratch, a special case…

Create a multi-node K3S Cluster on Docker containers using K3D Introduction Rancher has created its own Kubernetes distributions, RKE and K3S. RKE, is a CNCF-certified K8S distribution that runs on any host, with sole requirement a running docker engine instance. K3S on the other hand, is the lightweight alternative, that consolidates…

How can we reduce the size of Golang images by introducing Dockerfiles with a multi-stage build process Let’s start from a generic Dockerfile that takes care of the basic staff like dependencies, building the binaries, expose the necessary ports etc. for a very basic REST API in Go. FROM golang:1.16-alpine …

Use GitLab CI Pipelines to build Docker images for your Golang projects and to push them in Docker Hub. In this article we are going to setup a GitLab CI Pipeline from scratch for a Golang project and investigate the following topics: Assess the syntactical integrity of your code Run…

Run your GitLab CI/CD jobs inside isolated Docker containers With GitLab Runner’s Docker executor we are able to provide a completely isolated environment for each job in the pipeline, as an isolated container. We have actually two options here: either using the so called Docker in Docker, or alternatively bind…

Use the Terraform HTTP backend provided by GitLab to store you Terraform state in GitLab Terraform persists state data in files in order to track the status of the resources it manages. Out of the box, Terraform is utilizing a default backend, local, which stores state as a local file…

A simple solution to overcome the PV initialisation failure that leaves pods in a ContainerCreating state when using openebs-hostpath Storage Class in Rancher Installing OpenEBS on Rancher is an uncomplicated matter that will not take you more than 3–5 minutes. Soon enough though, you will be struck with a bit…

Set up a MetalLB Load Balancer on a bare metal Kubernetes Cluster Introduction Kubernetes offers the following service types: ClusterIP: provides a load-balanced IP address for one or more pods that match a label selector and forwards requests to this IP address. Consequently that is a service that is accessible only…