Live lab
Networking · Beginner
NGINX Load Balancer
Watch every request choose its server.
Reverse proxyLoad balancingHealth checksFailover
Launch environment →
Explore
Each environment is a working model of a real architecture: components you can inspect, traffic you can shape and failures you can cause.
Pods, nodes and the control loop that keeps them alive.
Bridges, veth pairs and port publishing.
Primaries, replicas and replication lag.
Cache hits, misses and the thundering herd.
Partitions, offsets and consumer groups.
Fan-out calls, retries and circuit breakers.
Why the closest server answers.
From a domain name to an IP address.
From git push to production.
Metrics, logs and traces that explain an outage.