k3s demo

Requirements

• linux distribution (instructions for ubuntu/debian with apt)
• amd64 and arm64 are working. See limitations below.
• 40 GB in /var (50 GB total disk size)
• 6 GB RAM
• 3 Cores
• additional packages
  • curl
  • git
  • sudo
  • apache2-utils

Installation

You can choose between a quick automatic installation with an ansible-playbook or you can run the required steps manually.

Quickstart ansible-playbook (tested on ubuntu)

setup: Installation by ansible-playbook

• k3s, shell env, certificates, /etc/hosts for subdomains *.k3sdemo.lan
• ingress-nginx
• monitoring stack (prometheus, grafana, alertmanager)
• argocd
• kubernetes-dashboard
• sealed-secrets
• loki logging

Manual Installation

• basic installtion tasks: Installation of k3s
• ArgoCD
  • ArgoCD Deployment and first steps
  • ArgoCD Application Deployment
• Monitoring
  • Monitoring (Grafana, Prometheus, Alertmanager, Node-Exporter)
• Logging
  • Loki Logging Stack

App Deployments

• Pods, Deployment, Service, Ingress
  • nginx webserver example
• ConfigMaps
  • nginx webserver with configmaps

limitations by architecture

There are some container images missing for arm64, so not all applications are working.

application	amd64	arm64	comment
argocd	✔️	✔️
configmaps	✔️	✔️
gogs	✔️	✔️
ingress-nginx	✔️	✔️
istio-bookinfo	✔️	⛔
istio-bookinfo-bombardier	✔️	⛔
istio-system	✔️	⛔
istio-system-jaeger	✔️	✔️
keycloak	✔️	⛔
kubernetes-dashboard	✔️	✔️
loki	✔️	✔️
mariadb-ephemeral	✔️	✔️ ⛔	phpmyadmin image not available, mariadb works
mariadb-pv	✔️	✔️ ⛔	phpmyadmin image not available, mariadb works
monitoring	✔️	✔️
postgres-operator	✔️	⛔
registry	✔️	✔️
sealed-secrets	✔️	✔️
starboard	✔️	⛔
tekton-pipelines	✔️	✔️
test-my-webserver	✔️	✔️
test-nginx-dev	✔️	✔️
test-nginx	✔️	✔️