Benchmark Kubernetes CNI

I was configuring recently Calico on a RKE2 cluster. I wanted to test the network performance of the CNI and check, if it can achieve the 100Gbps bandwidth of the NIC. iperf3 is a great tool for this, but unfortunately, it is single threaded and the test was CPU bound. To overcome this, I wrote a simple script, which runs multiple iperf3 tests on a Kubernetes cluster. The tool is available on my Github....

July 12, 2023 · 2 min

Running OpenEBS on a Odroid HC4 cluster

I bought recently two Odroid HC4 microcomputers and 4 Seagate Barracuda 2 TB HDD with the intention to farm Chia on them. The HC4 platform used on ARM64 processor and has two SATA 3, which can be used to plug HDD or SSD drive to it. At work, we are checking out currently the OpenEBS project, which allows to build a Container Attached Storage for Kubernetes using local disks. I was curious, if I could use OpenEBS on those HC4 devices and create a CAS for a Kubernetes home lab....

May 30, 2021 · 8 min

Integrating Cert Manager with Route53 on EKS

Integrating Cert Manager with Route53 on EKS In this article I will show, how you can automatically get Let’s Encrypt SSL certificates using Cert Manager. We will leverage the DNS01 challenge and use a Route53 Hosted Zone to answer the challenge. The Cert Manager will use an EKS IAM Role Service Account, which follows AWS best practices for security. Set up the EKS cluster with Terraform We will use this EKS module to provision our EKS cluster....

April 2, 2021 · 5 min