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Docker in depth

Intermediate7 sections · 30 lessons · ~11h total · 82-question self-test

01

Image management

4 lessonsTest yourself

01Image layers & internalsHow layers stack, cache, and get shared.14 min 02Multi-stage buildsSmall images with no build tools left behind.12 min 03Tags, digests & pinningMutable names vs immutable content.10 min 04Inspecting, saving & pruning imageshistory, inspect, save/load, prune.12 min

02

The Docker engine

4 lessonsTest yourself

01Engine architecturedockerd, containerd, shim, and runc.12 min 02Configuring the daemondaemon.json and engine defaults.12 min 03Logging & log driversWhere container output goes, and how to ship it.12 min 04How isolation works: namespaces & cgroupsThe kernel features under every container.14 min

03

Storage & volumes

2 lessonsTest yourself

01Volumes, bind mounts & tmpfsThe three ways to attach data.12 min 02Storage drivers & the layered filesystemoverlay2 and copy-on-write.12 min

04

Networking

5 lessonsTest yourself

01The container network model & driversCNM, bridge, host, macvlan, overlay.14 min 02DNS, discovery & publishing portsHow containers find and expose each other.12 min 03Managing portsPublishing, interfaces, ranges, and exposure.10 min 04Container linking (legacy) vs networksWhy --link gave way to user-defined networks.10 min 05Network troubleshootingA method for "it can't connect".10 min

05

Orchestration with Swarm

5 lessonsTest yourself

01Swarm mode & architectureManagers, workers, and the raft log.14 min 02Services, replicas & scalingThe declarative unit of Swarm.12 min 03Stacks: deploying a Compose fileOne file, a whole app, across nodes.12 min 04Overlay networks & the routing meshCross-node networking and load balancing.12 min 05Secrets & configs in SwarmDelivering sensitive data to services.12 min

06

Practical recipes

8 lessonsTest yourself

01Recipe: Node.js appA production Node image, non-root, cached deps.12 min 02Recipe: PostgreSQLPersistent data, secrets, healthcheck.12 min 03Recipe: RedisPersistence, memory limits, and auth.10 min 04Recipe: NGINX web server & reverse proxyServe static, proxy an app, terminate TLS.14 min 05Recipe: MongoDBAuth, a named volume, and a healthcheck.10 min 06Recipe: MySQLRoot vs app user, init scripts, secrets.10 min 07Recipe: Python appSlim base, venv, non-root, pinned wheels.12 min 08Recipe: WordPress + MySQLA two-service stack wired with Compose.12 min

07

Production & CI

2 lessonsTest yourself

01Docker best practicesThe habits that make images small, fast, and safe.12 min 02Docker in CI/CDBuild, scan, sign, and push from a pipeline.12 min

Final exam

Test yourself on everything

82 questions drawn from all 7 sections — every answer explained as you pick.

Start final exam