Challenges 🏆

Practical DevOps problems for all skill levels and interests

Write a Dagger Function to Build a Go Project 

Medium,  on  CI/CD ,  Submissions: 3/14
#dagger #docker

Create Your First Dagger Module 

Easy,  on  CI/CD ,  Submissions: 12/37
#dagger #docker

Install the Dagger CLI on a Linux Host 

Easy,  on  CI/CD ,  Submissions: 22/27
#dagger #docker

Copy Files To/From a Running Kubernetes Pod: a Distroless Image Case  Premium

Hard,  on  Containers ,  Kubernetes ,  Submissions: 14/85
#kubectl #distroless #debugging

Copy Files To/From a Running Kubernetes Pod: a Simple Case 

Easy,  on  Containers ,  Kubernetes ,  Submissions: 55/84
#kubectl #debugging

Copy Files To/From a Running Docker Container 

Easy,  on  Containers ,  Submissions: 46/74
#docker #debugging

Extract the Filesystem of a Container Image 

Medium,  on  Containers ,  Submissions: 20/97
#container-images #debugging #docker

Edit a File in a Running Container: a Simple Case 

Easy,  on  Containers ,  Submissions: 194/310
#debugging #docker

Edit a File in a Running Container: a Slim Base Image Case 

Medium,  on  Containers ,  Submissions: 103/142
#debugging #slim-images #distroless

Edit a File in a Running Kubernetes Pod: a Tricky Case 

Hard,  on  Containers ,  Kubernetes ,  Submissions: 29/158
#debugging #slim-images #distroless

Pick the Right Distroless Base Image For Your Application  Premium

Hard,  on  Containers ,  Submissions: 16/42
#container-images #slim-images #distroless

When a FROM scratch Container Image Is Not Good Enough 

Medium,  on  Containers ,  Submissions: 47/147
#container-images #slim-images #distroless

What Port Does This Kubernetes Pod Listen On? 

Medium,  on  Kubernetes ,  Containers ,  Networking ,  Submissions: 61/179
#debugging #slim-images #distroless

Send a Signal to a Kubernetes App: a Simple Case 

Easy,  on  Kubernetes ,  Containers ,  Submissions: 135/294
#debugging #kubectl #signals

Send a Signal to a Kubernetes App: a Non-Root Container Case  Premium

Hard,  on  Kubernetes ,  Containers ,  Submissions: 22/46
#ephemeral-containers #debugging #slim-images

Send a Signal to a Kubernetes App: a Slim Container Case 

Medium,  on  Kubernetes ,  Containers ,  Submissions: 65/158
#ephemeral-containers #debugging #slim-images

Create and Start a Container Manually With runc  Premium

Hard,  on  Containers ,  Submissions: 8/85
#oci-runtime #runc #rootfs

Containers 101: Start a Container With ctr 

Medium,  on  Containers ,  Submissions: 40/130
#containers-101 #containerd #ctr

Containers 101: Start a Container With contaiNERD CTL (nerdctl) 

Easy,  on  Containers ,  Submissions: 93/156
#containers-101 #containerd #nerdctl

Containers 101: Start a Container With Podman 

Easy,  on  Containers ,  Submissions: 90/145
#containers-101 #podman

Containers 101: Start a Container With Docker 

Easy,  on  Containers ,  Submissions: 196/373
#containers-101 #docker

Forward a Port Using the Hackers' Swiss Army Knife: netcat  Premium

Medium,  on  Linux ,  Networking ,  Submissions: 19/71
#port-forwarding #netcat

Forward a Port Using The Multipurpose Relay Tool: socat 

Easy,  on  Linux ,  Networking ,  Submissions: 112/200
#port-forwarding #socat

Forward a Port Without Starting a Proxy Process 

Medium,  on  Linux ,  Networking ,  Submissions: 38/150
#port-forwarding #iptables

Reproduce a Docker Bridge Network Using Basic Linux Commands  Premium

Hard,  on  Linux ,  Containers ,  Networking ,  Submissions: 11/24
#netns #iptables #bridge

Connect Multiple Network Namespaces 

Hard,  on  Linux ,  Containers ,  Networking ,  Submissions: 22/68
#netns #veth #bridge

Connect Two Network Namespaces 

Medium,  on  Linux ,  Containers ,  Networking ,  Submissions: 56/124
#netns #veth #ip

Set Up Network Address Translation (NAT) for a Container 

Medium,  on  Linux ,  Containers ,  Networking ,  Submissions: 28/56
#netns #iptables #nat

Create a Linux Network Namespace 

Easy,  on  Linux ,  Containers ,  Networking ,  Submissions: 174/264
#netns #nsenter #unshare

Network Access to a Container Started by ctr 

Hard,  on  Linux ,  Containers ,  Networking ,  Submissions: 32/52
#containerd #ctr #docker

Copying Files From Container Images Using ctr  Premium

Hard,  on  Containers ,  Submissions: 13/15
#container-images #containerd #ctr

Label a Container Image Using ctr 

Easy,  on  Containers ,  Submissions: 61/78
#container-images #containerd #ctr

Pulling Container Images Using ctr 

Easy,  on  Containers ,  Submissions: 91/127
#container-images #containerd #ctr

Tagging and Pushing Container Images Using ctr 

Easy,  on  Containers ,  Submissions: 72/108
#container-images #containerd #ctr

Reading Container Image Labels Using ctr  Premium

Medium,  on  Containers ,  Submissions: 13/21
#container-images #containerd #ctr

Access a Docker Container With No Published Ports 

Medium,  on  Linux ,  Containers ,  Networking ,  Submissions: 93/140
#containerd #ctr #docker

Execute a Command in a Docker Container Using ctr 

Medium,  on  Containers ,  Submissions: 25/37
#containerd #ctr #docker

Working With containerd Namespaces 

Easy,  on  Containers ,  Submissions: 66/151
#containerd #ctr #docker

Kubernetes Pod With a Faulty Init Sequence 

Medium,  on  Kubernetes ,  Containers ,  Submissions: 37/171
#sidecar #init-containers

Kubernetes Pod With a Sleepy Init Sequence 

Medium,  on  Kubernetes ,  Containers ,  Submissions: 30/146
#sidecar #init-containers
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