Cloud Native Computing Foundation Certifications

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.

Init Containers

Init Containers are specialized containers that run and complete before the main containers in a Kubernetes Pod start, used for setup tasks like initializing data or waiting for dependencies.

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.

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.

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.

Readiness Probes

A Kubernetes mechanism that checks if a container is ready to start accepting traffic and serve requests.

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.

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.