Challenges

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Easy, on Kubernetes

Set and Use Secrets in a Kubernetes Deployment

by Omkar Shelke

Configure a Kubernetes Deployment to consume Secrets as environment variables and volume mounts.

#cka #kubernetes-101 #secrets #deployment #ckad

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Medium, on Kubernetes

Mount Only the Required ConfigMap Keys as Files to Run a Node.js Application

by Omkar Shelke

A Deployment is failing because application configuration is missing. Mount only specific keys from an existing ConfigMap as files inside the Pod at the correct path so the application can start successfully.

#ckad #configmap #deployment #volume #nodejs

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Medium, on Kubernetes

Exclude a Sidecar from VPA Using Per-Container Resource Policy

by Omkar Shelke

Configure a Vertical Pod Autoscaler (VPA) with a per-container resource policy that provides recommendations for the main container while excluding the sidecar container from any VPA-managed scaling.

#cka #vpa #resources #sidecar #deployment

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Medium, on Kubernetes

Create and Assign a Custom PriorityClass to a Workload

by Omkar Shelke

Create a PriorityClass for production workloads and patch an existing deployment to use it, ensuring critical services get scheduled first during resource contention.

#cka #deployment #priorityclass #scheduling

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Medium, on Kubernetes

Enable Per-Pod DNS Records for a Deployment

by Omkar Shelke

A service in the mesh namespace returns only a single IP during DNS lookup, preventing the peer-server pods from finding each other. Investigate why DNS does not return one address per pod and change the service configuration so that peer discovery works correctly.

#cka #ckad #service #dns #deployment

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Easy, on Kubernetes, Security

Enforce TLSv1.3-Only Policy on a Production NGINX Deployment

by Omkar Shelke

Update a production NGINX ConfigMap to restrict TLS to v1.3 only, then verify the change enforces the security policy.

#cka #ckad #tls #configmap #deployment

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Easy, on Kubernetes

Configure a Memory-Backed emptyDir Volume with a Size Limit

by Omkar Shelke

A Deployment is using a disk-backed emptyDir volume. Convert it to a memory-backed tmpfs volume for better performance — but make sure to set a size limit to prevent the Pod from exhausting the node's RAM.

#ckad #cka #volumes #emptydir #deployment

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Easy, on Kubernetes

Resolve OOMKilled Errors by Reading VPA Memory Recommendations

by Omkar Shelke

Troubleshoot a Deployment where containers are repeatedly OOMKilled. Inspect Vertical Pod Autoscaler (VPA) recommendations and manually apply the recommended memory request and memory limit to stabilize the workload.

#cka #vpa #resources #oomkilled #deployment

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Medium, on Kubernetes

Place One Pod per Node Without Using a DaemonSet

by Omkar Shelke

Deploy a multi-container Kubernetes Deployment and ensure that no more than one Pod runs on the same worker node, without using a DaemonSet.

#scheduling #deployment #cka #multi-container

This challenge was created by a community author. Community content is reviewed by the iximiuz Labs team on a best effort basis.

Challenge, Easy, on Kubernetes

Perform In-Place Updates on a Kubernetes Deployment

by Omkar Shelke

Update container images, container names, update strategy, and replica count in an existing multi-container Kubernetes Deployment.

#kubernetes-101 #deployment #ckad #multi-container

Community Collection

Set and Use Secrets in a Kubernetes Deployment

Mount Only the Required ConfigMap Keys as Files to Run a Node.js Application

Exclude a Sidecar from VPA Using Per-Container Resource Policy

Create and Assign a Custom PriorityClass to a Workload

Enable Per-Pod DNS Records for a Deployment

Enforce TLSv1.3-Only Policy on a Production NGINX Deployment

Configure a Memory-Backed emptyDir Volume with a Size Limit

Resolve OOMKilled Errors by Reading VPA Memory Recommendations

Place One Pod per Node Without Using a DaemonSet

Perform In-Place Updates on a Kubernetes Deployment