15. Kubernetes Deployments and Rolling Updates
** Example:1 **
vi my-nginx-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-nginx-deployment-pod
labels:
app: mynginx
spec:
replicas: 3
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
name: my-nginx-deployment-container
image: nginx
ports:
containerPort: 80
kubectl create -f my-nginx-deployment.yaml
kubectl get deployments
kubectl get pods -l app=nginx -o wide
kubectl edit deployment my-nginx-deployment-pod
***** change number of replicas to 5.
spec:
progressDeadlineSeconds: 600
replicas: 5
*****************
kubectl get pods -l app=nginx
kubectl get replicaset
kubectl scale deployment my-nginx-deployment-pod --replicas=3
kubectl get pods -l app=nginx
