Configuring resources for workloads

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You can define CPU and memory allocations, as well as the container startup duration, for the IBM Confidential Computing Containers for Red Hat OpenShift Container Platform (CCCO) virtual machines (VMs) in your workload.

The resources can be configured by using annotations. If no configuration is provided, the CCCO VM is created with the following default resources:

  • vCPU: 3
  • Memory: 9216 MB
  • create_container_timeout: 900

Configuring resources by using annotations

You can specify CPU, memory resources and container creation duration directly in the workload pod definition by using annotations. These values are passed to the VM at runtime.

Supported annotations

  • io.katacontainers.config.hypervisor.default_vcpus: "<number_of_cpus>"

  • io.katacontainers.config.hypervisor.default_memory: "<memory_size>"

  • io.katacontainers.config.runtime.create_container_timeout: "<timeout-time>"

Example
apiVersion: v1
kind: Pod
metadata:
  annotations:
    io.katacontainers.config.hypervisor.default_vcpus: "3"
    io.katacontainers.config.hypervisor.default_memory: "9216"
    io.katacontainers.config.runtime.create_container_timeout: "900"
  name: busybox-dvm
spec:
  runtimeClassName: kata-remote
  containers:
  - name: busybox-container
    image: quay.io/prometheus/busybox
    command: ["sleep", "3600"]