Mastering Kubernetes - Second Edition

Using limit ranges for default compute quotas

1. A better way is to specify default compute limits. Enter limit ranges. Here is a configuration file that sets some defaults for containers:

    apiVersion: v1
    kind: LimitRange
    metadata:
      name: limits
    spec:
      limits:
      - default:
          cpu: 200m
          memory: 6Mi
        defaultRequest:
          cpu: 100m
          memory: 5Mi
        type: Container 
    
    > kubectl create -f limits.yaml
    limitrange "limits" created  

2. Here are the current default limits:

> kubectl describe limits limitsName:  limits
Namespace:  ns
Type Resource Min Max Default Request Default Limit Max Limit/Request Ratio
----          --------        ---     ---     ---------------            -------------     -----------------------
Container cpu     -   -   100m         200m       -
Container memory    -       -      5Mi      6Mi                 -

3. Now, let's run NGINX ...