func ValidateAndSetLinuxKubeletFlags()

in aks-node-controller/helpers/utils.go [187:230]
30 lines of code
10 McCabe index (conditional complexity)

func ValidateAndSetLinuxKubeletFlags(kubeletFlags map[string]string, cs *datamodel.ContainerService, profile *datamodel.AgentPoolProfile) {
	// If using kubelet config file, disable DynamicKubeletConfig feature gate and remove dynamic-config-dir
	// we should only allow users to configure from API (20201101 and later)
	delete(kubeletFlags, "--dynamic-config-dir")
	delete(kubeletFlags, "--non-masquerade-cidr")

	if profile != nil && profile.KubernetesConfig != nil && profile.KubernetesConfig.ContainerRuntime == "containerd" {
		dockerShimFlags := []string{
			"--cni-bin-dir",
			"--cni-cache-dir",
			"--cni-conf-dir",
			"--docker-endpoint",
			"--image-pull-progress-deadline",
			"--network-plugin",
			"--network-plugin-mtu",
		}
		for _, flag := range dockerShimFlags {
			delete(kubeletFlags, flag)
		}
	}

	if isKubeletServingCertificateRotationEnabled(kubeletFlags) {
		// ensure the required feature gate is set
		kubeletFlags["--feature-gates"] = addFeatureGateString(kubeletFlags["--feature-gates"], "RotateKubeletServerCertificate", true)
	}

	if IsKubernetesVersionGe(cs.Properties.OrchestratorProfile.OrchestratorVersion, "1.24.0") {
		kubeletFlags["--feature-gates"] = removeFeatureGateString(kubeletFlags["--feature-gates"], "DynamicKubeletConfig")
	} else if IsKubernetesVersionGe(cs.Properties.OrchestratorProfile.OrchestratorVersion, "1.11.0") {
		kubeletFlags["--feature-gates"] = addFeatureGateString(kubeletFlags["--feature-gates"], "DynamicKubeletConfig", false)
	}

	/* ContainerInsights depends on GPU accelerator Usage metrics from Kubelet cAdvisor endpoint but
	deprecation of this feature moved to beta which breaks the ContainerInsights customers with K8s
		version 1.20 or higher */
	/* Until Container Insights move to new API adding this feature gate to get the GPU metrics
	continue to work */
	/* Reference -
	https://github.com/kubernetes/enhancements/tree/master/keps/sig-node/1867-disable-accelerator-usage-metrics */
	if IsKubernetesVersionGe(cs.Properties.OrchestratorProfile.OrchestratorVersion, "1.20.0") &&
		!IsKubernetesVersionGe(cs.Properties.OrchestratorProfile.OrchestratorVersion, "1.25.0") {
		kubeletFlags["--feature-gates"] = addFeatureGateString(kubeletFlags["--feature-gates"], "DisableAcceleratorUsageMetrics", false)
	}
}