Resource quotas

Resource Requests and Limits

Each container inside a Pod can define two key resource settings:

• A request is the amount of CPU or memory that the container is guaranteed. The scheduler uses this value to decide where the Pod (and its containers) can run.
• A limit is the maximum amount of CPU or memory the container is allowed to use. If the container exceeds its memory limit, it may be terminated. If it exceeds its CPU limit, Kubernetes throttles it.

Default requests and limits

If the user does not set custom requests and limits for a container within a Pod, the following values are set by default:

Type	CPU	Memory
requests	1000m	2Gi
limits	2000m	2Gi

Info

m stands for milicores. 1000m will be the equivalent of 1 CPU core.

Custom requests and limits

The user can set custom values for the requests and limits of a container, but these values have to fall in a default range configured by LUMI-K admins. The default range is as follows:

Type	CPU	Memory
Min	50m	8Mi
Max	8	16Gi

Moreover, LUMI-K enforces a maximum limit-to-request ratio of 5. This means that the CPU or memory limits cannot be set to more than 5 times the request. So if the CPU request is 1 core, the CPU limit cannot be higher than 5 cores. If you want to increase the CPU limit to 10 cores, you will have to also increase CPU request to at least 2 cores.

Info

If the default ranges are not suitable for your use case, you can request adjusted resource ranges by contacting LUMI support. See the Contact page for instructions.

The following example adjust the values of request and limit in a Pod to match LUMI-K defined range:

apiVersion: v1
kind: Pod
metadata:
  name: example-pod
spec:
  containers:
  - name: app
    image: nginx:latest
    resources:
      requests:
        cpu: "200m"
        memory: "100Mi"
      limits:
        cpu: "1"
        memory: "500Mi"

Projects quotas

All LUMI-K projects associated with the same LUMI project share the same resource quota. The default quota assigned to a LUMI project within LUMI-K is as follows:

Resource	Default
CPU limits	12
Memory limits	48 Gi
Persistent Storage	200 Gi
Ephemeral Storage	10 Gi
Number of image streams (images)	40
Number of persistent volume claims	10
Number of pods	50
Max size of images pushed to LUMI-K registry	10 GiB

This means that the sum of CPU limits, of containers across all you LUMI-K projects associated with the same LUMI computing project cannot exceed 12 cores. The same restrictions apply for memory and other resources.

Note

Note that LUMI-K quotas are independent of the LUMI computing quotas that you applied for when creating LUMI project, and that LUMI-K usage does not count toward the LUMI computing quota.

Note

If your LUMI project is shared with other team members, they can create new LUMI-K projects (see project creation page). Keep in mind that the quota will be shared with them.

You can find the resource usage and quota of a project in the project view in the web interface under Administration -> ResourceQuota and Administration -> LimitRanges.

Requesting more quota

If you need more resources than the defaults, you can apply for more LUMI-K quota by contacting the Help Desk.