Adnan Selimovic - qdnqn

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Kafka KRaft Strimzi behind Nginx ingress controller TLS/SSL

Kafka Strimzi operator is used to automate the deployment and configuration of the Kafka cluster on the Kubernetes. This blog will focus on the configuration of the mTLS behind Nginx ingress controller. The Kafka will be deployed using KRaft. As of time of writting (16.11.2023) it is not

K3s reinstall traefik

Redeploy Traefik on the k3s To configure Traefik create a new YAML file and provide the needed details as shown below. apiVersion: helm.cattle.io/v1 kind: HelmChartConfig metadata: name: traefik namespace: kube-system spec: valuesContent: |- additionalArguments: - "--api" - "--api.dashboard=true" - "--api.insecure=true" - "--log.level=

K3s remove traefik

To install the K3s, on the new VM instance, you can simply run the script in the terminal: curl -sfL https://get.k3s.io | sh - After the installation and initial setup process (which can take a few minutes), you can access the k3s cluster using the kube config file

What is the function of calico's felix agent in a kubernetes cluster?

Kube-proxy vs Calico Felix Kube-proxy is the default network agent on the node. Kube-proxy relies on iptables to enforce packet filtering. Calico’s replacement for the kube-proxy is Felix. What Felix do is: talk directly to the Kube api-server instead of talking through kube-proxy. Felix also gives the possibility to

Calico vs kube-proxy

Kube-proxy vs Calico Felix Kube-proxy is the default network agent on the node. Kube-proxy relies on iptables to enforce packet filtering. Calico’s replacement for the kube-proxy is Felix. What Felix do is: talk directly to the Kube api-server instead of talking through kube-proxy. Felix also gives the possibility to

Traefik x-forwarded-for headers

To describe the concept of the x-forwarded-for headers and how to configure additionally those headers Kubernetes cluster is needed. K3s is easy to install and ready to use Kubernetes cluster. Read a detailed article on how to install k3s. Install k3s kubernetes clusterWhat is k3s? K3s is a lightweight and

K3s expose service

To install single node k3s cluster is pretty straightforward using k3s provided install script is enough. If you need simple cluster for local development or local testing see the article below. Install k3s kubernetes clusterWhat is k3s? K3s is a lightweight and certified Kubernetes distribution built by the Rancher. It’

K3s Traefik dashboard

To install the K3s, on the new VM instance, you can simply run the script in the terminal: curl -sfL https://get.k3s.io | sh - After the installation and initial setup process (which can take a few minutes), you can access the k3s cluster using the kube config file

Argo ApplicationSet override template per environment

ApplicationSet is an elegant feature for handing out manual work to the Argo. It enables you to generate Argo Applications programmatically. In this article, I will demonstrate how I tackled the problem of overriding ApplicationSet template.spec of the applications itself per environment. ApplicationSet reference example is given below: apiVersion:

Linux iptables and eBPF: manipulating and monitoring network on the Linux kernel

Iptables is an essential userspace application used for the network filtering/firewall rules definition and enforcing them. Linux kernel implements netfilter framework which gives the user possibility to read and manipulate network packets via kernel modules that registers callback functions on a set of netfilter hooks. The traveling of the