Configuring HPA for Auto Scaling

Overview

CCI 2.0 allows you to configure HorizontalPodAutoscaler (HPA) to automatically scale Deployments.

HPA periodically scales Deployments to match observed metrics, such as average vCPU usage, average memory usage, or any custom metrics you specify.

Procedure

1. Log in to the CCI 2.0 console. In the navigation pane, choose Workloads. On the Deployments tab, click the workload name to go to the workload details page.

   

2. Click Auto Scaling and then Create from YAML to create an HPA policy.

   

   The following is an example YAML file for creating an HPA policy:

   kind: HorizontalPodAutoscaler
   apiVersion: cci/v2
   metadata:
     name: alpha-test-hpa
     namespace: cci-test              # Namespace
   spec:
     scaleTargetRef:
       kind: Deployment
       name: nginx
       apiVersion: cci/v2
     minReplicas: 1                   # Minimum number of replicas
     maxReplicas: 5                   # Maximum number of replicas
     metrics:
       - type: Resource
         resource:
           name: memory               # vCPU or memory metrics
           target:
             type: Utilization        # Scaling type
             averageUtilization: 50   # Average resource usage that triggers scaling
       - type: Resource
         resource:
           name: cpu
           target:
             type: Utilization
             averageUtilization: 50

3. On the workload details page, select a pod and click View Terminal. Then, run the following command:

   while true; do curl 127.0.0.1:80; done

   Wait until the HPA is triggered, the workload is scaled out, and an event is reported.