DevOps: Puppet, Docker, and Kubernetes

Working with names

When you create any Kubernetes objects such as a pod, replication controller and service, you can assign a name to it. The names in Kubernetes are spatially unique, which means you cannot assign the same name in the pods.

Getting ready

Kubernetes allows us to assign a name with the following restrictions:

• Up to 253 characters
• Lowercase of alphabet and numeric characters
• May contain special characters in the middle but only dash (-) and dot (.)

How to do it…

The following example is the pod definition that assigns the pod name as my-pod, to the container name as my-container, you can successfully create it as follows:

# cat my-pod.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  containers:
  - name: my-container
 image: ...