Challenge, Medium, on
Start a systemd Service on the First Connection (TCP Socket Edition)
Configure systemd to keep a TCP port open at all times while starting the backing service process only when the first connection arrives.
Challenges
Focused hands-on problems designed to help you hone your DevOps or Server Side skills. Some challenges are more educational, while others are based on real-world scenarios. The platform provides hints and feedback for each challenge, including automated solution checks.
Challenge, Medium, on
Start a systemd Service on the First Connection (Unix Socket Edition)
Configure systemd to keep a Unix domain socket open at all times while starting the backing service process only when the first connection arrives.
Submissions: 17/25
Challenge, Medium, on
Klustered: Level Four
The cluster is broken again. Get the Klustered deployment healthy and serving a quote, then ship the v2 image to unlock the victory dance.
Submissions: 12/15
Make One Echo Server Work with Both TCP and Unix Sockets
Make a single echo server listen on either a TCP socket or a Unix domain socket, selected by its command-line argument. The challenge illustrates that the same stream-socket workflow works with two address families (AF_INET and AF_UNIX).
Submissions: 9/23
Write a TCP Client for a Chat Server
Write a TCP client to hold a back-and-forth conversation with a "chat" server: send a line, read the reply, send another line - repeat until the session is over. A hands-on lesson in designing an application protocol on top of a byte-oriented TCP stream.
Write a TCP Client for a Telemetry Server
Write your first TCP client for a push-only telemetry server that starts sending sensor readings as soon as you connect. Likely the easiest way to get started with TCP socket programming.
Write a TCP Echo Server From Scratch
The Hello World of network programming: implement a tiny TCP echo server in the language of your choice.
Challenge, Hard, on
Klustered: Level Three
Make sure the Klustered deployment is running and that you can browse to it and see the counter increase with each refresh.
Submissions: 18/44
Challenge, Medium, on
Klustered: Level Two
Make sure the Klustered deployment is running the v2 tag and that you can visit the application to see a lovely quote and a video of me dancing.
Submissions: 20/38
Challenge, Easy, on
Create and Apply a Kubernetes Job with Completions and Parallelism
by Omkar Shelke
Create a Kubernetes Job template for Team Aurora that runs a busybox command across multiple completions in parallel, with specific pod labels and container configuration.
Submissions: 23/29