Challenge, Medium, on
Hardening Docker Containers Using gVisor Runtime
by Omkar Shelke
Configure Docker to use gVisor (runsc) as the default runtime and verify kernel isolation between the host and containers.
Submissions: 15/18
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
Install and Configure containerd on a Linux Host
In this challenge, you will practice installing and configuring containerd: obtaining the release binaries, placing them in the correct locations, adding the container runtime and CNI plugins to the system, and starting a container with full networking support.
Submissions: 103/228
Challenge, Medium, on
Extract the Filesystem of a Container Image
Can you unpack the filesystem of a container image into a local directory?
Submissions: 433/882
Challenge, Medium, on
Start and Inspect a Container With containerd CLI - ctr
Can you start a container using the default containerd CLI, ctr? Knowing how to use ctr may come in handy when you need to debug lower-level container issues.
Submissions: 393/819
Challenge, Medium, on
Read Container Image Labels Using ctr
Learn a trick or two about container image labels and how to read them with ctr.
Submissions: 144/194
Challenge, Medium, on
Execute a Command in a Docker Container Using ctr
Can you find a way to execute a command in a Docker container using ctr?
Submissions: 149/199