Redis & Kubernetes: Flow and Failure Simulator
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A live inventory API running on Kubernetes, backed by Redis Cluster for caching and Redis Sentinel for sessions. Every panel on this page reads from the running cluster through the app's own API.
Redis Cluster · cache
state
—
shards
—
clients
—
mem
—
ks-hits
—
ks-misses
—
evicted
—
expired
—
Sentinel · sessions
role
—
replicas
—
clients
—
AOF
—
AOF-rw
—
RDB
—
since-save
—
lag
—
Read items (cache demo)
Add item
Cache hit rate
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—
Cluster slots
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of 16384
Items in DB
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Postgres
Cluster nodes
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—
Request flow and cluster topology
Sentinel failover (sessions)
Cluster shard failure (cache)
Memory pressure and eviction
Hot key
AOF and RDB recovery
Run simulation
redis.kappenhagen.io
client · HTTPS
→
Traefik
ingress · TLS
→
FastAPI
inventory-app ×2
→
Redis Cluster
cache first
→
Postgres
source of truth
Route key
Type a key and press Route. The flow lights up to Redis and the shard that owns the key glows below, and the math is explained in the panel.
Simulation
Redis master
Redis replica
Sentinel
FastAPI
Postgres
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Live request log
No requests yet. Click "Read items" above.