K
Q

Is it possible to set resource quotas only for namespaces? [kubernetes]

2/11/2020

We have 3 namespaces on a kubernetes cluster

dev-test / build / prod

I want to limit the resource usage for dev-test & build only. Can I set the resource quotas only for these namespaces without specifying (default-) resource requests & limits on the pod/container level?

If the resource usage on the limited namespaces is low, prod can use the rest completely, and it can grow only to a limited value, so prod resource usage is protected.

apiVersion: v1
kind: ResourceQuota
metadata:
  name: dev-test
spec:
  hard:
    cpu: "2"
    memory: 8Gi

Is this enough?

-- Alexej Medvedev
kubernetes

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2 Answers

2/11/2020

Yes you can use kubeclt CLI as well to define resource quota per namespace.

Example :

$ kubectl create namespace testquotaspace
namespace/testquotaspace created

$ kubectl create quota testquota -n testquotaspace --hard=cpu=1,memory=8Gi
resourcequota/testquota created

$ kubectl describe namespaces testquotaspace
Name:         testquotaspace
Labels:       <none>
Annotations:  <none>
Status:       Active

Resource Quotas
 Name:     testquota
 Resource  Used  Hard
 --------  ---   ---
 cpu       0     1
 memory    0     8Gi

No LimitRange resource.

you can choose to limit the other objects you need as well like PODS/SERVICE/PVC etc .. Just run help on CLI and will have all details

$ kubectl create quota --help
Create a resourcequota with the specified name, hard limits and optional scopes

Aliases:
quota, resourcequota

Examples:
  # Create a new resourcequota named my-quota
  kubectl create quota my-quota
--hard=cpu=1,memory=1G,pods=2,services=3,replicationcontrollers=2,resourcequotas=1,secrets=5,persistentvolumeclaims=10

If you do need yamls you can generate as follow and pipe to a file as needed

$ kubectl create quota testquota -n testquotaspace --hard=cpu=1,memory=8Gi  --dry-run -o yaml
apiVersion: v1
kind: ResourceQuota
metadata:
  creationTimestamp: null
  name: testquota
  namespace: testquotaspace
spec:
  hard:
    cpu: "1"
    memory: 8Gi
-- DT.
Source: StackOverflow
2/11/2020

Yes, you can set resource limits per namespace using ResourceQuota object:

apiVersion: v1
kind: ResourceQuota
metadata:
  name: mem-cpu-demo
spec:
  hard:
    requests.cpu: "1"
    requests.memory: 1Gi
    limits.cpu: "2"
    limits.memory: 2Gi

From kubernetes documentation.

-- hilsenrat
Source: StackOverflow