func()

in internal/kubelet/config.go [306:347]

• 30 lines of code
• 8 McCabe index (conditional complexity)

func (ksc *kubeletConfig) withHybridReservedResources() error {
	ksc.SystemReservedCgroup = ptr.String("/system")
	ksc.KubeReservedCgroup = ptr.String("/runtime")

	// calculate kube reserved memory
	totalMemory, err := system.GetMachineMemoryCapacity()
	if err != nil {
		return err
	}
	// Convert bytes to GiB
	totalMemoryGiB := totalMemory / (1024 * 1024 * 1024)
	var reserveMemoryString string

	// For memory resources, nodeadm will reserve according to the following table for hybrid nodes
	// 255 MiB when total memory is < 1GiB
	// 25% of first 4GiB of total memory
	// 20% of next 4GiB of total memory
	// 10% of next 8 GiB of total memory
	// 6% of next 112 GiB of total memory
	// 2% of remaining total memory
	switch {
	case totalMemoryGiB < 1:
		reserveMemoryString = fmt.Sprintf("%dMi", 255)
	case totalMemoryGiB < 4:
		reserveMemoryString = fmt.Sprintf("%dGi", int(math.Round(float64(totalMemoryGiB)*0.25)))
	case totalMemoryGiB < 8:
		reserveMemoryString = fmt.Sprintf("%dGi", int(math.Round((0.25*4)+float64(totalMemoryGiB-4)*0.2)))
	case totalMemoryGiB < 16:
		reserveMemoryString = fmt.Sprintf("%dGi", int(math.Round((0.25*4)+(0.20*4)+float64(totalMemoryGiB-8)*0.1)))
	case totalMemoryGiB <= 128:
		reserveMemoryString = fmt.Sprintf("%dGi", int(math.Round((0.25*4)+(0.20*4)+(0.10*8)+float64(totalMemoryGiB-16)*0.06)))
	case totalMemoryGiB > 128:
		reserveMemoryString = fmt.Sprintf("%dGi", int(math.Round((0.25*4)+(0.20*4)+(0.10*8)+(0.06*112)+float64(totalMemoryGiB-128)*0.02)))
	}

	ksc.KubeReserved = map[string]string{
		"cpu":               fmt.Sprintf("%dm", getCPUMillicoresToReserve()),
		"ephemeral-storage": "1Gi",
		"memory":            reserveMemoryString,
	}
	return nil
}