DevOps & Automation
CNCF CKA: Scheduling with Taints, Tolerations, and Affinity
Kubernetes scheduling matches unscheduled Pods to nodes that can run them. Most workloads can rely on the default scheduler, which…
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DevOps & Automation
CNCF CKA: Kubernetes RBAC
Kubernetes Role-Based Access Control, or RBAC, governs what authenticated identities are allowed to do through the Kubernetes API. It is…
DevOps & Automation
CNCF CKA: Pods, Deployments, and ReplicaSets
Kubernetes runs application containers inside Pods, but administrators rarely manage production Pods one by one. Higher-level workload controllers create, replace,…
Infrastructure & Systems
CNCF CKA: Persistent Volumes and Storage Classes
Containers are disposable, but application data often is not. Kubernetes therefore separates workload lifecycle from persistent storage through PersistentVolumes, PersistentVolumeClaims,…
Networking
CNCF CKA: Kubernetes Services and Networking
Kubernetes networking lets Pods communicate across nodes while Services provide stable endpoints over a changing set of Pods. The key…
DevOps & Automation
CNCF CKA: Kubernetes Cluster Architecture
Kubernetes architecture is built around a control plane that stores desired state and a set of worker nodes that run…
DevOps & Automation
CNCF CKA: Ingress, Gateway API, and External Access
Applications running in Kubernetes often need traffic from outside the cluster. The challenge is not simply opening a port. Operators…
DevOps & Automation
CNCF CKA: ConfigMaps, Secrets, and App Configuration
Container images should be reusable across environments. A production database hostname, a feature flag, or an API credential should not…
Cloud Computing
CNCF KCNA: Service Mesh for Cloud Native
A service mesh adds a dedicated infrastructure layer for service-to-service communication. Instead of asking every application team to implement mutual…