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Resources Policy trait

The resources policy trait is used for components to limit container's resources.

Installation

None. The resources policy trait has no external dependencies.

Supported workload types

  • core.oam.dev/v1alpha1.Server
  • core.oam.dev/v1alpha1.SingletonServer
  • core.oam.dev/v1alpha1.Task
  • core.oam.dev/v1alpha1.SingletonTask
  • core.oam.dev/v1alpha1.Worker
  • core.oam.dev/v1alpha1.SingletonWorker

Properties

Name Description Allowable values Required Default
container The container name. string. Matches the container name declared in ComponentSchematic. ☑
limits Limits describes the maximum amount of compute resources allowed. map ☑

Usage

This is usage of how to use the resources policy:

apiVersion: core.oam.dev/v1alpha1
kind: ApplicationConfiguration
metadata:
  name: resource-example
spec:
  components:
    - componentName: nginx-replicated
      instanceName: resource-demo
      traits:
        - name: resources-policy
          properties:
            container: server
            limits:
              cpu: 200m
              memory: 256Mi

Example

$ resourecs-policy % kubectl create -f component-schematics.yaml 
componentschematic.core.oam.dev/nginx-replicated created
$ resourecs-policy % kubectl create -f application-configurations.yaml 
applicationconfiguration.core.oam.dev/resource-example created
$ resourecs-policy % kubectl get deploy resource-demo -oyaml
apiVersion: apps/v1
kind: Deployment
...
spec:
  ...
  template:
    spec:
      containers:
      - image: nginx:latest
        imagePullPolicy: Always
        name: server
        ports:
        - containerPort: 80
          name: http
          protocol: TCP
        resources:
          limits:
            cpu: 200m
            memory: 256Mi
          requests:
            cpu: 100m
            memory: 128Mi
...