Configure Resource Specification

You can manage container-level resource specification in the AppConfiguration model via the resources field (under the Container schema).

For the full Container schema reference, please see here for more details.

Prerequisites

Please refer to the prerequisites in the guide for deploying an application.

The example below also requires you to have initialized the project using the kusion init command, which will generate a kcl.mod file under the project directory.

Example

Update the resources value in dev/main.k:

import catalog.models.schema.v1 as ac

helloworld: ac.AppConfiguration {
    workload.containers.helloworld: {
        # dev stack has different resource requirements
        # set resources to your want
        # before:
        # resources: {
        #     "cpu": "500m"
        #     "memory": "512M"
        # }
        # after: 
        resources: {
            "cpu": "250m"
            "memory": "256Mi"
        }
    }
}

Everything else in main.k stay the same.

Applying

Re-run steps in Applying, resource scaling is completed.

$ kusion apply
✔︎  Generating Spec in the Stack dev...                                                                                                                                                                                                                                         
Stack: dev  ID                                                       Action
* ├─     v1:Namespace:helloworld                                  UnChanged
* ├─     v1:Service:helloworld:helloworld-dev-helloworld-private  UnChanged
* └─     apps/v1:Deployment:helloworld:helloworld-dev-helloworld  Update


? Do you want to apply these diffs? yes
Start applying diffs ...
 SUCCESS  UnChanged v1:Namespace:helloworld, skip                                                                                                                                                                                                                               
 SUCCESS  UnChanged v1:Service:helloworld:helloworld-dev-helloworld-private, skip                                                                                                                                                                                               
 SUCCESS  Update apps/v1:Deployment:helloworld:helloworld-dev-helloworld success                                                                                                                                                                                                
Update apps/v1:Deployment:helloworld:helloworld-dev-helloworld success [3/3] █████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████ 100% | 0s
Apply complete! Resources: 0 created, 1 updated, 0 deleted.

Validation

We can verify the application container (in the deployment template) now has the updated resources attributes (cpu:250m, memory:256Mi) as defined in the container configuration:

kubectl get deployment -n helloworld -o yaml
...
    template:
      ...
      spec:
        containers:
        - env:
          ...
          image: gcr.io/google-samples/gb-frontend:v4
          ...
          resources:
            limits:
              cpu: 250m
              memory: 256Mi
...