From there, as you can see, we have two values, v1 and Pod, mapped to two keys, apiVersion, and kind. The first line is a separator, and is optional unless you’re trying to define multiple structures in a single file. For example, you might have a config file that starts like this: - apiVersion: v1 kind: Pod Maps let you associate name-value pairs, which of course is convenient when you’re trying to set up configuration information. That’s not to say there aren’t more complex things you can do, but in general, this is all you need to get started. You might have maps of lists and lists of maps, and so on, but if you’ve got those two structures down, you’re all set. There are only two types of structures you need to know about in YAML: Still, there may be situations where the JSON format is more convenient, so it’s good to know that it’s available to you.įortunately, YAML is relatively easy to learn. Even if you’re only trying to find examples on the web, they’re most likely in (non-JSON) YAML, so we might as well get used to it. On the other hand, that’s not very likely, unfortunately. So on the one hand, if you know JSON and you’re only ever going to write your own YAML (as opposed to reading other people’s) you’re all set. YAML is a superset of JSON, which means that any valid JSON file is also a valid YAML file. Flexibility: You’ll be able to create much more complex structures using YAML than you can on the command line.Maintenance: YAML files can be added to source control, such as a Github repository so you can track changes.Convenience: You’ll no longer have to add all of your parameters to the command line.When defining a Kubernetes manifest, YAML gives you a number of advantages, including: For example, in this article, we’ll pick apart the YAML definitions for creating first a Pod, and then a Deployment. YAML, which stands for Yet Another Markup Language, or YAML Ain’t Markup Language (depending who you ask) is a human-readable text-based format for specifying configuration-type information.

It’s difficult to escape YAML if you’re doing anything related to many software fields - particularly Kubernetes, SDN, and OpenStack. Creating a Kubernetes Deployment using YAML.In this article, we’ll look at how YAML works and use it to define first a Kubernetes Pod, and then a Kubernetes Deployment. So far, we’ve been working exclusively with the CLI, but there’s an easier and more useful way to do it: creating configuration files using kubernetes YAML.

In previous articles, we’ve been talking about how to use Kubernetes to spin up resources. Watch a recording of author Nick Chase in a webinar on Kubernetes Deployments using YAML.

Pex through yml file tutorial