instruction: Create a Dockerfile for workloads
output: ```dockerfile
  from a manifest into JSON or another supported
  serialization format when making the API request over HTTP.
  Here's an example manifest that shows the required fields and object spec for a Kubernetes
  Deployment:
  
  application/deployment.yaml
  
  apiVersion: apps/v1
  kind: Deployment
  metadata:
   name: nginx-deployment
  spec:
   selector:
   matchLabels:
   app: nginx
   replicas: 2 # tells deployment to run 2 pods matching the template
   template:
   metadata:
   labels:
   app: nginx
   spec:
   containers:
   - name: nginx
   image: nginx:1.14.2
   ports:
   - containerPort: 80
  
  One way to create a Deployment using a manifest file like the one above is to use the
  kubectl apply command
  in the kubectl command-line interface, passing the .yaml file as an argument. Here's an example:
  kubectl apply -f https://k8s.io/examples/application/deployment.yaml
  The output is similar to this:
  deployment.apps/nginx-deployment created
  Required fields
  In the manifest (YAML or JSON file) for the Kubernetes object you want to create, you'll need to set values for
  the following fields:
  
  apiVersion - Which version of the Kubernetes API you're using to create this object
  kind - What kind of object you want to create
  metadata - Data that helps uniquely identify the object, including a name string, UID, and optional namespace
  spec - What state you desire for the object
  
  The precise format of the object spec is different for every Kubernetes object, and contains
  nested fields specific to that object. The Kubernetes API Reference
  can help you find the spec format for all of the objects you can create using Kubernetes.
  For example, see the spec field
  for the Pod API reference.
  For each Pod, the .spec field specifies the pod and its desired state (such as the container image name for
  each container within that pod).
  Another example of an object specification is the
  spec field
  for the StatefulSet API. For StatefulSet, the .spec field specifies the StatefulSet and
  its desired state.
  Within the .spec of a StatefulSet is a template
  for Pod objects. That template describes Pods that the StatefulSet controller will create in order to
  satisfy the StatefulSet specification.
  Different kinds of objects can also have different .status; again, the API reference pages
  detail the structure of that .status field, and its content for each different type of object.
  Note:See Configuration Best Practices for additional
  information on writing YAML configuration files.
  Server side field validation
  Starting with Kubernetes v1.25, the API server offers server side
  field validation
  that detects unrecognized or duplicate fields in an object. It provides all the functionality
  of kubectl --validate on the server side.
  The kubectl tool uses the --validate flag to set the level of field validation. It accepts the
  values ignore, warn, and strict while also accepting the values true (equivalent to strict)
  and false (equivalent to ignore). The default validation setting for kubectl is --validate=true.
  
  Strict
  Strict field validation, errors on validation failure
  Warn
  Field validation is performed, but errors are exposed as warnings rather than failing the request
  Ignore
  No server side field validation is performed
  
  When kubectl cannot connect to an API server that supports field validation it will fall back
  to using client-side validation. Kubernetes 1.27 and later versions always offer field validation;
  older Kubernetes releases might not. If your cluster is older than v1.27, check the documentation
  for your version of Kubernetes.
  What's next
  If you're new to Kubernetes, read more about the following:
  
  Pods which are the most important basic Kubernetes objects.
  Deployment objects.
  Controllers in Kubernetes.
  kubectl and kubectl commands.
  
  Kubernetes Object Management
  explains how to use kubectl to manage objects.
  You might need to install kubectl if you don't already have it available.
  To learn about the Kubernetes API in general, visit:
  
  Kubernetes API overview
  
  To learn about objects in Kubernetes in more depth, read other pages in this section:
  
  Kubernetes Object Management
  Object Names and IDs
  Labels and Selectors
  Namespaces
  Annotations
  Field Selectors
  Finalizers
  Owners and Dependents
  Recommended Labels
  
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  Understanding Kubernetes objects
  
  Object spec and status
  Describing a Kubernetes object
  Required fields
  
  Server side field validation
  What's next
  
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  © 2025 The Kubernetes Authors | Documentation Distributed under CC BY 4.0
  
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  ```