Challenges 🏆

Practical DevOps problems for all skill levels and interests

Limit CPU and Memory Usage of a Docker Compose Application 

Medium,  on  Containers ,  Linux ,  Submissions: 8/19
#docker #docker-compose #cgroups

Make the Container Exit When One of Its Processes Runs Out of Memory 

Medium,  on  Containers ,  Linux ,  Submissions: 8/30
#docker #cgroups #systemd

Kill the Entire Process Group When One Process Runs Out of Memory 

Medium,  on  Linux ,  Submissions: 8/24
#cgroups #oom

Restart a Container With Limited Resources 

Medium,  on  Containers ,  Submissions: 38/127
#containers-101 #cgroups #docker

Write a Dagger Function to Test a Go Project 

Medium,  on  CI/CD ,  Submissions: 9/38
#dagger #docker

Write a Dagger Function to Build a Go Project 

Medium,  on  CI/CD ,  Submissions: 10/46
#dagger #docker

Extract the Filesystem of a Container Image 

Medium,  on  Containers ,  Submissions: 40/139
#container-images #debugging #docker

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

Medium,  on  Containers ,  Submissions: 117/160
#debugging #slim-images #distroless

When a FROM scratch Container Image Is Not Good Enough 

Medium,  on  Containers ,  Submissions: 53/160
#container-images #slim-images #distroless

What Port Does This Kubernetes Pod Listen On? 

Medium,  on  Kubernetes ,  Containers ,  Networking ,  Submissions: 88/255
#debugging #slim-images #distroless

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

Medium,  on  Kubernetes ,  Containers ,  Submissions: 85/202
#ephemeral-containers #debugging #slim-images

Start and Inspect a Container With containerd CLI - ctr 

Medium,  on  Containers ,  Submissions: 56/162
#containers-101 #containerd #ctr

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

Medium,  on  Linux ,  Networking ,  Submissions: 24/79
#port-forwarding #netcat

Forward a Port Without Starting a Proxy Process 

Medium,  on  Linux ,  Networking ,  Submissions: 50/180
#port-forwarding #iptables

Connect Two Network Namespaces 

Medium,  on  Linux ,  Containers ,  Networking ,  Submissions: 77/164
#netns #veth #ip

Set Up Network Address Translation (NAT) for a Container 

Medium,  on  Linux ,  Containers ,  Networking ,  Submissions: 38/71
#netns #iptables #nat

Reading Container Image Labels Using ctr  Premium

Medium,  on  Containers ,  Submissions: 23/37
#container-images #containerd #ctr

Access a Docker Container With No Published Ports 

Medium,  on  Linux ,  Containers ,  Networking ,  Submissions: 111/163
#containerd #ctr #docker

Execute a Command in a Docker Container Using ctr 

Medium,  on  Containers ,  Submissions: 37/58
#containerd #ctr #docker

Kubernetes Pod With a Faulty Init Sequence 

Medium,  on  Kubernetes ,  Containers ,  Submissions: 50/218
#sidecar #init-containers

Kubernetes Pod With a Sleepy Init Sequence 

Medium,  on  Kubernetes ,  Containers ,  Submissions: 36/176
#sidecar #init-containers
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