Having already learned about Pods and how to create them, you may be struck by an urge to create many, many pods. Please do! But eventually you will need a system to organize these pods into groups. The system for achieving this in Kubernetes is Labels. Labels are key-value pairs that are attached to each API object in Kubernetes. Label selectors can be passed along with a RESTful ```list``` request to the apiserver to retrieve a list of objects which match that label selector. For example:
Having already learned about Pods and how to create them, you may be struck by an urge to create many, many pods. Please do! But eventually you will need a system to organize these pods into groups. The system for achieving this in Kubernetes is Labels. Labels are key-value pairs that are attached to each API object in Kubernetes. Label selectors can be passed along with a RESTful ```list``` request to the apiserver to retrieve a list of objects which match that label selector. For example:
```sh
```sh
cluster/kubecfg.sh -lname=nginx list pods
cluster/kubectl.sh get pods -lname=nginx
```
```
Lists all pods who name label matches 'nginx'. Labels are discussed in detail [elsewhere](https://github.com/GoogleCloudPlatform/kubernetes/blob/master/docs/labels.md), but they are a core concept for two additional building blocks for Kubernetes, Replication Controllers and Services
Lists all pods who name label matches 'nginx'. Labels are discussed in detail [elsewhere](https://github.com/GoogleCloudPlatform/kubernetes/blob/master/docs/labels.md), but they are a core concept for two additional building blocks for Kubernetes, Replication Controllers and Services
