All-Things-Docker-and-Kubernetes

Manifests

A Manifest contains all the properties that we can define different Kubernetes resources. We can describe all the resource-specific attribute using spec or specification in the manifest file.

How Manifests Works

1. We can run kubectl create to create the Kubernetes resources using the manifest.
2. kubectl sends the manifest to Kubernetes API server.

3. API server does the following actions:

   • Select the node with sufficient resources
   • Schedule Pod onto that node
   • The node pull down the Pod’s container image
   • The node starts the Pod’s containers

Here’s a sample manifest file that creates a basic NGINX Pod.

apiVersion: v1 
kind: Pod
metadata:
    name: pod-nginx
spec:
    containers:
    - name: container-nginx-1
      image: nginx:latest

Every manifest has the same set of top-level properties:

• apiVersion - usually v1, which is core API version
• kind - indicates the resource to be created
• metadata - details about the resource
• spec - specifications of the declared resource

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