Create and Manage Deployment Using Imperative Commands¶
Let's look at the imperative commands that you can use to create and manage Kubernetes Deployments
.
Here is the Docker Image used in this tutorial: reyanshkharga/nginx
Step 1: Create a Deployment¶
# Command template
kubectl create deployment <deployment-name> --image=<image-name> --replicas=<replica-count>
{OR}
kubectl create deployment/<deployment-name> --image=<image-name> --replicas=<replica-count>
# Actual command
kubectl create deployment my-deployment --image=reyanshkharga/nginx:v1 --replicas 2
{OR}
kubectl create deployment/my-deployment --image=reyanshkharga/nginx:v1 --replicas 2
Step 2: List Deployments¶
# List all deployments
kubectl get deployments
# List all deployments with expanded (aka "wide") output
kubectl get deployments -o wide
Resource types are case-insensitive and you can specify the singular, plural, or abbreviated forms.
The following commands produce the same output:
Note
deployment
is abbreviated as deploy
.
The UP-TO-DATE
field shows how many replicas have been updated to the latest version, while the AVAILABLE
field shows how many replicas are currently available and ready to serve traffic.
Step 3: View ReplicaSets Created by the Deployment¶
You'll see a ReplicaSet
created and managed by the Deployment.
The name of the ReplicaSets
created by Deployments
starts with the deployment name.
Step 4: View Pods Created by the Deployment¶
You'll see Pods created and managed by the Deployment
.
The name of the pods created by a Deployment
starts with the deployment name.
Step 5: Describe a Deployment¶
# Command template
kubectl describe deployment <deployment-name>
{OR}
kubectl describe deployment/<deployment-name>
# Actual command
kubectl describe deployment my-deployment
{OR}
kubectl describe deployment/my-deployment