kubernetes-resources

Kubernetes Pods, Deployments, and Services are core resources for running containerized workloads. Pods are the smallest deployable units, Deployments manage ReplicaSets for scaling, and Services expose Pods internally or externally. This Skill provides YAML manifests and guidance for creating and maintaining these resources end-to-end across your cluster.

Deployments manage ReplicaSets, which in turn manage Pods. A Deployment defines the desired state; the ReplicaSet ensures the correct number of Pod replicas run at any time. This hierarchical relationship enables rolling updates and automatic scaling while maintaining cluster stability.

Services expose Pods internally or externally using ClusterIP, NodePort, or LoadBalancer types. Ingress provides HTTP/HTTPS routing and virtual hosting across multiple Services. Together they enable traffic management and application accessibility in Kubernetes environments.

ConfigMaps store non-sensitive configuration data as key-value pairs, while Secrets store sensitive data like passwords and tokens. Both are mounted into Pod containers as environment variables or volumes, separating configuration from application code and enabling secure credential management.

PersistentVolumes (PVs) are cluster-level storage resources, and PersistentVolumeClaims (PVCs) are requests for storage by Pods. PVCs bind to PVs, decoupling storage provisioning from Pod consumption and enabling stateful applications to persist data across Pod restarts.

Jobs run batch processes to completion, while CronJobs schedule Jobs at specific intervals. StatefulSets and DaemonSets manage ordered, persistent Pod identities and cluster-wide deployment patterns respectively, covering stateful and infrastructure-level workload requirements.