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Resource limiting

To set resource quota, use oc create -f quota.yaml on a file like this:

apiVersion: v1
kind: ResourceQuota
metadata:
  name: myquota
spec:
  hard:
    # Number of parallel builds
    pods: 10
    # Compute units (KCU) for all builds
    cpu: "2"
    # Memory for all builds
    memory: 2Gi
    # Storage for all builds
    storage: 20Gi

Now oc describe quota myquota will show the used and total amount of each resource type.

You can set default per-build limits either by setting them in the OSBS build configuration file (cpu_limit, memory_limit, storage_limit), or by setting defaults that OpenShift will apply to builds that do not specify their limits:

apiVersion: v1
kind: LimitRange
metadata:
  name: limits
spec:
  limits:
  - default:
      # 100m == 0.1 KCU
      cpu: 100m
      memory: 512Mi
      storage: 2Gi
    type: Container

You can set per-build limits using the --cpu-limit, --memory-limit, and --storage-limit OSBS command line options.

You can set quota for pods, cpu, memory, and storage, but you do not have to set quota for all of them. If you set quota for cpu, memory, or storage, you must also set limits for that resource: builds not specifying limits are unbounded and will not be admitted.

You do not have to set limits for pods. Each build takes a fixed quantity (1 pod).

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