Pods represent and hold a collection of one or more containers. Generally, if you have multiple containers with a hard dependency on each other, you package the containers inside a single pod.
fb02d86798243fcb.png
Kubernetes Services
A service is a grouping of pods that are running on the cluster. Services are "cheap" and you can have many services within the cluster. Kubernetes services can efficiently power a microservice architecture.
Services provide important features that are standardized across the cluster: load-balancing, service discovery between applications, and features to support zero-downtime application deployments.
Each service has a pod label query which defines the pods which will process data for the service. This label query frequently matches pods created by one or more replication controllers. Powerful routing scenarios are possible by updating a service's label query via the Kubernetes API with deployment software.
