01 - Core Concepts - Deployments

Deployments

$ kubectl get deployments         

$ kubectl get deploy                 

Get the current Deployments deployed.

$ kubectl describe deploy <deployment-name>        

Get detailed information about Deployment.

$ kubectl explain deploy                            

$ kubectl explain deploy | head -n3            

Get the documentation of the resource and its fields.

$ kubectl api-resources | grep deploy           

Create a Deployment

• Name: httpd-frontend
• Replicas: 3
• Image: httpd:2.4-alpine

(1) Method 1

$ kubectl create -f deployment-definition-httpd.yaml             

```yaml

apiVersion: apps/v1

kind: Deployment

metadata:

  name: httpd-frontend

spec:

  replicas: 3

  selector:

    matchLabels:

      name: httpd-frontend

  template:

    metadata:

      labels:

        name: httpd-frontend

    spec:

      containers:

      - name: httpd-frontend

        image: httpd:2.4-alpine

```

(2) Method 2

$ kubectl create deployment httpd-frontend --image=httpd:2.4-alpine --replicas=3 --dry-run=client -o yaml              

$ kubectl create deployment --help                                                                        

$ kubectl create deployment httpd-frontend --image=httpd:2.4-alpine --replicas=3