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Version: v1.0

Manual Scaling

The scaler trait allows you to scale your component instance manually.

$ kubectl vela show scaler
# Properties
+----------+--------------------------------+------+----------+---------+
| NAME | DESCRIPTION | TYPE | REQUIRED | DEFAULT |
+----------+--------------------------------+------+----------+---------+
| replicas | Specify replicas of workload | int | true | 1 |
+----------+--------------------------------+------+----------+---------+

Declare an application with scaler trait.

# sample-manual.yaml
apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: website
spec:
components:
- name: frontend
type: webservice
properties:
image: nginx
traits:
- type: scaler
properties:
replicas: 2
- type: sidecar
properties:
name: "sidecar-test"
image: "fluentd"
- name: backend
type: worker
properties:
image: busybox
cmd:
- sleep
- '1000'

Apply the sample application:

$ kubectl apply -f https://raw.githubusercontent.com/oam-dev/kubevela/master/docs/examples/enduser/sample-manual.yaml
application.core.oam.dev/website configured

In runtime cluster, you can see the underlying deployment of frontend component has 2 replicas now.

$ kubectl get deploy -l app.oam.dev/name=website
NAME READY UP-TO-DATE AVAILABLE AGE
backend 1/1 1 1 19h
frontend 2/2 2 2 19h

To scale up or scale down, you just need to modify the replicas field of scaler trait and re-apply the YAML.

Last updated on by yangsoon