Scale out resource vertically by resource quota

Posted on | In |

Set default resource quota for namespace

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# kubectl describe quota --namespace=quota-example
Name:           compute-resources
Namespace:      quota-example
Resource        Used    Hard
--------        ----    ----
limits.cpu      200m    2
limits.memory   512Mi   2Gi
pods            1       4
requests.cpu    100m    1
requests.memory 256Mi   1Gi

Deploy pod/deployment/rs to namespace, then deployment will use default resource quota without explicit specification.

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kubectl run nginx --image=nginx --replicas=1 --namespace=quota-example
deployment "nginx" created
[root@cdsdev-radiant-0001 quota]# kubectl describe limits limits --namespace=quota-example
Name:           limits
Namespace:      quota-example
Type            Resource        Min     Max     Default Request Default Limit   Max Limit/Request Ratio
----            --------        ---     ---     --------------- -------------   -----------------------
Container       cpu             -       -       100m            200m            -
Container       memory          -       -       256Mi           512Mi           -

kubectl describe rs --namespace=quota-example

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Name:           nginx-2040093540
Namespace:      quota-example
Image(s):       nginx
Selector:       pod-template-hash=2040093540,run=nginx
Labels:         pod-template-hash=2040093540,run=nginx
Replicas:       1 current / 1 desired
Pods Status:    1 Running / 0 Waiting / 0 Succeeded / 0 Failed
No volumes.
Events:
  FirstSeen     LastSeen        Count   From                            SubobjectPath   Type            Reason                  Message
  ---------     --------        -----   ----                            -------------   --------        ------                  -------
  53s           53s             1       {replicaset-controller }                        Normal          SuccessfulCreate        Created pod: nginx-2040093540-iizoo

kubectl describe quota --namespace=quota-example

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Name:           best-effort
Namespace:      quota-example
Scopes:         BestEffort
 * Matches all pods that have best effort quality of service.
Resource        Used    Hard
--------        ----    ----
pods            0       10
Name:           compute-resources
Namespace:      quota-example
Resource        Used    Hard
--------        ----    ----
limits.cpu      200m    2
limits.memory   512Mi   2Gi
pods            1       4
requests.cpu    100m    1
requests.memory 256Mi   1Gi
kubectl replace -f compute-resources.yaml  --namespace=quota-example
resourcequota "compute-resources" replaced
[root@cdsdev-radiant-0001 quota]# kubectl describe quota --namespace=quota-example
Name:           best-effort
Namespace:      quota-example
Scopes:         BestEffort
 * Matches all pods that have best effort quality of service.
Resource        Used    Hard
--------        ----    ----
pods            0       10
Name:           compute-resources
Namespace:      quota-example
Resource        Used    Hard
--------        ----    ----
limits.cpu      200m    4
limits.memory   512Mi   4Gi
pods            1       4
requests.cpu    100m    2
requests.memory 256Mi   2Gi