Kubernetes Playgrounds by Adam Leskis
Remote sandboxes for learning and experimentation — fresh Linux VMs, Docker hosts, or Kubernetes clusters in seconds.
GitLab CE on Kubernetes
A multi-node kubeadm cluster that installs GitLab CE with the official Helm chart at startup, with in-cluster PostgreSQL, Redis, RustFS object storage, Container Registry, and an Envoy HTTPS Gateway.
Cloud Tracing Lab
Diagnose realistic distributed tracing scenarios in a preloaded k3s VM, for users to get more familiar with traces in general and jaeger-ui specifically. There's guided investigation through distributed traces, along with identification of slow spans and comparing two traces to identify what changed to make it slow down.
OWASP K8s Vulnerable Cluster
This playground presents a k3s cluster that has randomized security vulnerabilities injected based on the OWASP Kubernetes Top 10 list for 2025. Run a scan to find what's wrong, then fix it and get another random vulnerability automatically injected. Play as long as you like!
Tailscale Homelab Access
A multi-node K3s cluster to demo connecting and troubleshooting a homelab remotely via tailscale. All username/passwords are admin/admin123