Design architectures, write Dockerfiles and compose files, type docker commands. Then watch it all run through a day of traffic and outages, and get graded on what actually works.
The Beginner tier of every lab is free. No account needed to try.
A small online shop on a busy day, up to 650 requests per second.
The same shop in Docker Compose, on a single server.
compose.yaml
services:
web:
build: ./web
ports: ["80:80"]
depends_on: [api]
# restart: unless-stopped
api:
build: ./api
# restart: unless-stopped
db:
image: postgres:16
# restart: unless-stopped
# volumes:
# - pgdata:/var/lib/postgresql/data
# volumes:
# pgdata:
Each lab simulates one part of a real platform, with the same five tiers, the same Uptime points and one plan for all of them.
Design architectures from real components, send them a day of traffic and outages, and see what holds.
40 exercises · 77 components · 199 concepts
Write Dockerfiles and compose files, type docker commands, and watch images, containers, networks and a Swarm cluster behave like the real ones.
35 exercises · 63 concepts
Deploy, scale and repair workloads on a simulated cluster from a terminal.
Networks, identities and managed services, the way cloud providers really bill them.
Subnets, routing, DNS and TLS, packet by packet.
New Architecture Studio
Not an exercise this time: your architecture, your traffic, your goals. Draw regions, VPCs and subnets, get every change checked like a real deployment, throw outages at it, and compare the monthly bill on AWS, Azure and Google Cloud.
Traffic, budget, and the failure that will happen at 10:00. Exactly what you would get at work.
Components and their settings, Dockerfiles, compose files, commands: whatever the lab is about, you do it yourself.
Crashes, traffic peaks, full disks, lost nodes. Every failure is explained, with the concept to read.
Any solution that meets the objectives passes. Then compare it with an expert reference.
Each tier you complete in a lab adds a nine to your rank in that lab, the way availability is measured in production. Uptime points add up across all labs and place you on the leaderboard.
Choose a labRun the basics and understand them: a server, a database, a first container.
Build what holds real traffic: load balancing, caching, clean images, multi-service stacks.
Operate and secure it: distributed data, failures, graceful shutdowns, least privilege.
Run platforms at scale: multi-region systems, consensus, clusters and zero-downtime updates.
Defend an architecture against real constraints: cost, migrations, compliance and teams.
Reviews
C'est très intéressant comme exercice de simulation d'architecture cloud... Je vais m'amuser avec .
trop bien, ca permet d'apprendre en meme temps, moi qui ai toujours voulu faire du DevOps ici on voit tous pas juste du presque petit tout fourni que les instrument comme coolify et dekploy font ici on voit clairement on peut tout monter
C'est bien parce que là, je mets une fois en pratique, toutes les notions que je peux lire et voir dans les tutos
The Beginner level of every lab is free. A plan opens the next levels of every lab and the Studio, with every premium article, the practice exams and the members' community, from 9 USD for 30 days, by card, PayPal or mobile money, with no automatic renewal.
It is a tool where you build part of a real platform, an architecture, a Docker image, a cluster, then watch it run under realistic traffic and failures. You see latency, errors, resources and cost change, and learn why it holds or breaks instead of only reading about it.
Two labs are open today: system design, with 40 exercises, and containers, with 35 exercises on Docker and Docker Compose. Docker Swarm joins the containers lab next, then Kubernetes, cloud architecture and networking labs.
Yes. The containers lab simulates a Docker server in your browser: you write Dockerfiles and compose files, type docker commands, and watch images, containers, volumes and networks behave like the real ones. Then a production test reboots, upgrades and probes your server, and you see what holds. Its Beginner tier is free.
Yes. The 77 components of the system design lab are modelled on the services teams run in the cloud: virtual machines, auto-scaling groups, managed SQL and NoSQL databases, object storage, CDNs, queues, event logs, serverless functions. You choose regions and availability zones, and each design shows an estimated monthly cost.
The Beginner tier of every lab is free: 18 exercises today, plus the whole concept library. One plan unlocks the next levels of every lab and the Studio, with the premium articles and the community, for a period of access, by card, PayPal or mobile money.
No. Everything runs in your browser, best on a computer or a tablet. You can try the first exercise without an account.
Yes. Every lab, its exercises and the concept library are available in English and French.
Runbookly assistant
Quick answers about the site. A person answers through the contact page.