VS Code Extension for YAML & Kubernetes

In VS Code's Extensions Marketplace, search for YAML and install YAML by Red Hat. 

The following steps show how to enable support for Kubernetes.

Upon installation, on extension's tab page, click on the cog and choose Extension Settings.

In settings: find Yaml: Schemas and click on Edit in settings.json

... and in that file add the following:

    "yaml.schemas": {  

        "kubernetes": "*.yaml"

    }

After this, in YAML file, type in apiVersion (the first required property of the Kubernetes YAML definition file) and auto-completion and auto-indentation for Kubernetes YAML files will kick in:

In case of errors in YAML formatting or Kubernetes YAML file not matching the Kubernetes YAML schema, this extension will show an error: