Getting the size of a Kubernetes cluster right is not an easy task, if the number of nodes provisioned is too high, resources might be underutilized and if it’s too low, new workloads won’t be able to be scheduled in the cluster. Setting the number of nodes manually is a simple approach, but it requires […]
Category: devops
Cluster-wide registry authentication 🌐🔐
Using private container image registries is a common practice in the industry, as it ensures applications packaged within the images are just accessible for users which hold the right set of credentials. Besides, in some cases, using credentials for some registries helps overcoming pull rate limitations, for example when using paid subscriptions for DockerHub. The […]
Kaniko: Building images without Docker🐳🔫
Building container images is a pretty common stage within the modern CI flows, in which these images are the main artifact used to distribute and run apps. Building images in a “classic” way implies using docker as a daemon and the docker CLI. This approach can be easily implemented in local environments, where all you […]
Kubernetes in 5 Minutes ⏱️☸️
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Ksniff: packet capture at pod level for k8s 🕵️♂️📦
Troubleshooting containers in Kubernetes is a recurring topic that you may face regularly. Logging and monitoring tools come in really handy here as they help you better understanding what is going on in the cluster or in the containers itself. Besides, it is possible to get valuable insights with the help of the classic kubectl […]
Helmfile: turbocharging Helm ☸️🔧
Helm is definitely one the most used tools in the Kubernetes world. It comes in pretty handy as it is a deployment tool, a package manager and a templating tool which can help customizing the behavior of application releases based on the values used. Plus, it offers ideal features for its integration in modern CI/CD […]
Pulumi: Multi-Platform Multi-Language IaC 📚🏗️
This is the second article on Infrastructure as Code using well-known programming languages. The first one was focused on the AWS CDK. In this post, we will introduce Pulumi, a similar tool which offers multi-cloud support. Infrastructure as Code (IaC) is one of the biggest revolutions in the cloud computing landscape, as it allows automating […]
AWS CDK: Dev-like IaC 🖥️🏗️
Infrastructure as Code (IaC) is one of the biggest revolutions in the cloud computing landscape, as it allows automating the deployment of infrastructure based on its definition in the source code. Using code as the source of truth for infrastructure has several benefits: Infrastructure can be versioned as source code normally is, increasing the traceability […]
Kops: deploying Kubernetes programatically ☸️🕹️
Setting up a Kubernetes cluster from scratch can be challenging, specially if you don’t use managed Kubernetes services and you need to guarantee High Availability. Kops (Kubernetes Operations) is an open source tool which helps to set up, upgrade and manage ‘non-managed’ Kubernetes Clusters on top of public cloud providers. In this post, you will […]
Debugging with ephemeral containers in K8s 🔲🔳
Have you ever faced a situation when working with a Kubernetes cluster in which a container within a pod is not working as expected and you need to do some debugging? I’m sure you have. The first step to follow in this troubleshooting scenario would be to try to figure out what’s going on inside […]
