K3s is deployed by default with a metrics-server, but if you have a multi-node cluster it will fail unless you add the names of all the nodes to the kube-apiserver certificate. Symptoms of this problem include: metrics-server deployment will throw x509 errors in its log Error when you try to run “kubectl top pods” No … Kubernetes: fixing x509 certificate errors from metric-server on K3s cluster
The default setting for pod DNS resolution has CoreDNS use the settings from the underlying OS of the worker node. If your Kubernetes VMs are joined to multiple networks or search domains, this can cause unexpected results as well as performance issues. If you are using K3s, you can provide an independent resolv.conf file for … Kubernetes: independent resolv.conf for CoreDNS with K3s
The kube-prometheus-stack bundles the Prometheus Operator, monitors/rules, Grafana dashboards, and AlertManager needed to monitor a Kubernetes cluster. But there are customizations necessary to tailor the Helm installation for K3s, a lightweight Kubernetes installation. In this article, I will detail the necessary modifications to deploy a healthy monitoring stack on a K3s cluster.
By default, K3s uses the Traefik ingress controller and Klipper service load balancer to expose services. But this can be replaced with a MetalLB load balancer and Istio ingress controller. K3s is perfectly capable of handling Istio operators, gateways, and virtual services if you want the advanced policy, security, and observability offered by Istio. In … Kubernetes: K3s with multiple Istio ingress gateways
Updated March 2023: using K3s 1.26 and MetalLB 0.13.9 By default, K3s uses the Traefik ingress controller and Klipper service load balancer to expose services. But this can be replaced with a MetalLB load balancer and NGINX ingress controller. But a single NGINX ingress controller is sometimes not sufficient. For example, the primary ingress may … Kubernetes: K3s with multiple metalLB endpoints and nginx ingress controllers
Updated Aug 2023: using the latest K3s 1.27, MetalLB 0.13.9, and NGINX v1.8.1 K3s is a lightweight Kubernetes deployment by Rancher that is fully compliant, yet also compact enough to run on development boxes and edge devices. In this article, I will show you how to deploy a three-node K3s cluster on Ubuntu nodes that … Kubernetes: K3s cluster on Ubuntu using Ansible
Updated March 2023: using K3s 1.25 and Ubuntu 22.04 K3s is a lightweight Kubernetes deployment by Rancher that is fully compliant, yet also compact enough to run on development boxes and edge devices. In this article, I will show you how to deploy a three-node K3s cluster on Ubuntu nodes that are created using Terraform … Kubernetes: K3s cluster on Ubuntu using terraform and libvirt