How to create Kubernetes YAML files the smart way with kubectl

To save time, and ensure the syntax and formatting are correct, a more efficient way to create a YAML file with the specs for a pod is to use kubectl and the --dry-run flag.

$ kubectl run pod --image nginx --dry-run=client -o yaml > nginx-pod.yaml

This will let kubectl write the YAML file. The main benefits of doing it this way are:

1. You can modify the YAML template before having to deploy it to the Kubernetes cluster.

2. You can modify the template to add volumes, env variables and other configurations.

3. The formatting of the YAML file will be correct and you reduce the chances of syntax error.

The -o yaml flag tells kubectl to output the definition in YAML format.