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Understanding Kubernetes Deployment — A Beginner’s Guide
Find Complete mind map of A Beginner’s Guide to Kubernetes
In Kubernetes, a Deployment is a resource object that defines the desired state of an application or workload. It provides a way to declaratively manage the deployment and scaling of containerized applications.
Deployments help to manage the lifecycle of replica sets and pods. They ensure that the desired number of replicas are always available and in the desired state.
They also help to simplify updates and rollbacks to the application.
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Why Do We Need Deployments in Kubernetes?
In a Kubernetes cluster, Pods are ephemeral and can be replaced by newer instances as they become available. This replacement can be caused by various factors, such as scaling the application, node failure, or pod failure. Deployments help to ensure that the desired number of replica pods is always available and that the replacement of pods is done gracefully, without any downtime or interruption to the application.
Creating a Deployment in Kubernetes
You can create a Deployment in Kubernetes either imperatively (using command-line tools like kubectl) or declaratively (using a YAML file).
You can create a deployment in Kubernetes using either the imperative or declarative approach.
Imperative Approach
To create a deployment using the imperative approach, you can use the kubectl create deployment command. Here's an example:
kubectl create deployment…
