Learn Kubernetes weekly — issue 19

22 Mar 2023

Don't miss the most important Kubernetes events in Europe this year!

And if you haven't registered to KubeCon, the Linux Foundation shared a 10% discount code that you can use: KCEU23LK810.

Which sessions do you plan to attend?

Hit the reply and let me know!

Articles

ahmetb/kubectl-foreach
kubectl-foreach is a kubectl plugin that runs a kubectl command in one or more contexts (clusters) in parallel (similar to GNU parallel/xargs).
Exploiting Distroless images
Daniel Teixeira
In this article, you will learn how abuse of functionality in the OpenSSL binary, installed in the official Google Container Tools Distroless Base container image, allows for command execution and arbitrary file read and write on distroless containers.
Deploying non-deployable things on ArgoCD with kustomize, handling edge cases
Damian Kęska
In this article, you will learn how to extend Kustomize with custom behaviour using Go.
Then, you will use your plugin to customise ArgoCD with custom logic.
Communication between microservices in a Kubernetes cluster
Narasimha Prasanna HN
This article discusses the various ways in which microservices in Kubernetes can communicate with each other.
It provides an example of two pods, one acting as an HTTP web server and the other as a curl client that makes a request to the web server.
Managing database migrations safely in high replicated Kubernetes deployment
Raul Castellanos
In this article, you will learn how to run database migrations in Kubernetes using the Job resource, init containers and rolling updates.
Liveness probes: feel the pulse of the app
Roman Belshevitz (Balashevich)
This article provides some helpful examples to correctly configure your liveness, startup and readiness probes in Kubernetes.

Full CI/CD workflow with Skaffold for your application
Raul Castellanos
In this 3-part series, you will learn how to build a complete workflow from a local environment to production, using Skaffold, Gitlab, Kustomize, Kaniko and Terraform.
Developing a Kustomize custom plugin with containerized KRM function using Go
Thirumurthi S
In this tutorial, you will learn how to develop a custom plugin for Kustomize using container KRM functions.

- DevOps Engineer with Paymentology
- Salary: £40K to £65K a year
- Location: remote from the United Kingdom
- Tech stack: Kubernetes, AWS, Azure, GCP, Docker, Shell, Powershell, Python, Terraform, Cloudformation
- DevOps Engineer with Siemens
- Salary: $95.8K to $172K a year
- Location: based in the office (and remote from home) in Remote (Charlotte, US)
- Tech stack: Kubernetes, On-premise, OpenShift, ArgoCD, Docker, Shell, Perl, Python, Terraform, Cloudformation

jetpack-io/launchpad
Launchpad is a command-line tool that lets you easily create applications on Kubernetes.
In practice, Launchpad works similarly to Heroku or Vercel, except everything is on Kubernetes.
kubernetes-sigs/etcdadm
etcdadm is a command-line tool for operating an etcd cluster.
It makes it easy to create a new cluster, add a member to, or remove a member from an existing cluster.
Its user experience is inspired by kubeadm.
kube-vip/kube-vip
kube-vip provides Kubernetes clusters with a virtual IP and load balancer for both the control plane (for building a highly-available cluster) and Kubernetes Services of type LoadBalancer without relying on any external hardware or software.
otterize/network-mapper
Otterize network mapper creates a map of in-cluster traffic by capturing DNS traffic and inspecting active connections.
kube-bind/kube-bind
kube-bind is a new extension model for Kubernetes clusters:
- Service providers can bind APIs to a cluster.
- These APIs should not require custom controllers.
- Only a single agent should be required.