In Kubernetes, you can use a Deployment
to rollout new updates to your application. A Deployment
is a higher-level object that manages a set of replicas of your application, and provides declarative updates to those replicas.
To rollout a new update to your application using a Deployment
, you can update the Deployment
configuration to specify the new version of your application. The Deployment
will then rollout the update to the replicas in a controlled manner, according to the update strategy specified in the Deployment
configuration.
For example, you can update the Deployment
configuration to specify a new container image for your application, like this:
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-deployment
spec:
replicas: 3
selector:
matchLabels:
app: my-app
template:
metadata:
labels:
app: my-app
spec:
containers:
- name: my-app
image: my-app:v2
This Deployment
configuration will rollout the update to the replicas in a rolling update fashion, replacing the old replicas with new ones one by one.
You can then apply the updated Deployment
configuration to the cluster using the kubectl apply
command:
kubectl apply -f deployment.yml
This will rollout the new version of the application to the replicas managed by the Deployment
.
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