Cloud Native Computing Foundation Certifications

Environment Variables in Pods

Environment variables in pods are key-value pairs that pass configuration data into containerized applications running in Kubernetes, letting the app read settings without hardcoding them.

Resource Requests and Limits

Resource Requests and Limits are Kubernetes settings that tell the system how much CPU and memory a container needs and how much it is allowed to use at most.

Startup Probes

A Kubernetes mechanism that checks whether an application inside a container has started successfully, and delays other health checks until it is ready.

Sidecar Containers

A sidecar container is a secondary container that runs alongside a primary application container in the same Kubernetes pod, providing supporting functionality without altering the main application.

Liveness Probes

A liveness probe is a Kubernetes health check that tells the system whether a container is running properly and should be kept alive or restarted.

Metrics Server

The Metrics Server is a cluster-wide aggregator of resource usage data in Kubernetes, collecting CPU and memory metrics from nodes and pods for autoscaling and monitoring.

Pod Security Context

A Pod Security Context defines privilege and access control settings for a Pod or its containers in Kubernetes, such as which user ID to run as or which Linux capabilities to allow.

Container Logs

Container logs are records of output generated by applications running inside a container, showing what the application did, errors it encountered, or status updates it produced.