MON-3168: Add option to specify resource limits for all components

Signed-off-by: Pranshu Srivastava <[email protected]>

Author: rexagod

CHANGELOG.md

@@ -7,6 +7,7 @@
 - [#1950](https://github.com/openshift/cluster-monitoring-operator/pull/1950) Disable CORS headers on Thanos querier by default and add a flag to enable them back.
 - [#1963](https://github.com/openshift/cluster-monitoring-operator/pull/1963) Add nodeExporter settings for network devices list.
 - [#2049](https://github.com/openshift/cluster-monitoring-operator/pull/2049) Remove Kube*QuotaOvercommit alerts.
+- [#2067](https://github.com/openshift/cluster-monitoring-operator/pull/2067) Add options to specify resource requests and limits for all components.
 
 ## 4.13
 

pkg/manifests/manifests.go

@@ -750,6 +750,9 @@ func (f *Factory) KubeStateMetricsDeployment() (*appsv1.Deployment, error) {
 			d.Spec.Template.Spec.Containers[i].Args = f.setTLSSecurityConfiguration(container.Args, KubeRbacProxyTLSCipherSuitesFlag, KubeRbacProxyMinTLSVersionFlag)
 		case "kube-state-metrics":
 			d.Spec.Template.Spec.Containers[i].Image = f.config.Images.KubeStateMetrics
+			if f.config.ClusterMonitoringConfiguration.KubeStateMetricsConfig.Resources != nil {
+				d.Spec.Template.Spec.Containers[i].Resources = *f.config.ClusterMonitoringConfiguration.KubeStateMetricsConfig.Resources
+			}
 		}
 	}
 
@@ -809,6 +812,9 @@ func (f *Factory) OpenShiftStateMetricsDeployment() (*appsv1.Deployment, error)
 			d.Spec.Template.Spec.Containers[i].Args = f.setTLSSecurityConfiguration(container.Args, KubeRbacProxyTLSCipherSuitesFlag, KubeRbacProxyMinTLSVersionFlag)
 		case "openshift-state-metrics":
 			d.Spec.Template.Spec.Containers[i].Image = f.config.Images.OpenShiftStateMetrics
+			if f.config.ClusterMonitoringConfiguration.OpenShiftMetricsConfig.Resources != nil {
+				d.Spec.Template.Spec.Containers[i].Resources = *f.config.ClusterMonitoringConfiguration.OpenShiftMetricsConfig.Resources
+			}
 		}
 	}
 
@@ -964,6 +970,9 @@ func (f *Factory) NodeExporterDaemonSet() (*appsv1.DaemonSet, error) {
 			if err != nil {
 				return nil, err
 			}
+			if f.config.ClusterMonitoringConfiguration.NodeExporterConfig.Resources != nil {
+				ds.Spec.Template.Spec.Containers[i].Resources = *f.config.ClusterMonitoringConfiguration.NodeExporterConfig.Resources
+			}
 		case "kube-rbac-proxy":
 			ds.Spec.Template.Spec.Containers[i].Image = f.config.Images.KubeRbacProxy
 			ds.Spec.Template.Spec.Containers[i].Args = f.setTLSSecurityConfiguration(container.Args, KubeRbacProxyTLSCipherSuitesFlag, KubeRbacProxyMinTLSVersionFlag)
@@ -2004,6 +2013,10 @@ func (f *Factory) PrometheusAdapterDeployment(apiAuthSecretName string, requesth
 	spec.Containers[0].Args = f.setTLSSecurityConfiguration(spec.Containers[0].Args,
 		PrometheusAdapterTLSCipherSuitesFlag, PrometheusAdapterTLSMinTLSVersionFlag)
 
+	if f.config.ClusterMonitoringConfiguration.K8sPrometheusAdapter.Resources != nil {
+		spec.Containers[0].Resources = *f.config.ClusterMonitoringConfiguration.K8sPrometheusAdapter.Resources
+	}
+
 	dep.Spec.Template.Spec = spec
 
 	return dep, nil
@@ -2162,6 +2175,8 @@ func (f *Factory) PrometheusOperatorAdmissionWebhookDeployment() (*appsv1.Deploy
 		case "prometheus-operator-admission-webhook":
 			d.Spec.Template.Spec.Containers[i].Image = f.config.Images.PrometheusOperatorAdmissionWebhook
 
+			// TODO: Derive resource request from relevant deployment(s)?
+
 			args := d.Spec.Template.Spec.Containers[i].Args
 			if f.config.ClusterMonitoringConfiguration.PrometheusOperatorConfig.LogLevel != "" {
 				args = append(args, fmt.Sprintf("--log-level=%s", f.config.ClusterMonitoringConfiguration.PrometheusOperatorConfig.LogLevel))
@@ -2213,6 +2228,10 @@ func (f *Factory) PrometheusOperatorDeployment() (*appsv1.Deployment, error) {
 		case "prometheus-operator":
 			d.Spec.Template.Spec.Containers[i].Image = f.config.Images.PrometheusOperator
 
+			if f.config.ClusterMonitoringConfiguration.PrometheusOperatorConfig.Resources != nil {
+				d.Spec.Template.Spec.Containers[i].Resources = *f.config.ClusterMonitoringConfiguration.PrometheusOperatorConfig.Resources
+			}
+
 			args := d.Spec.Template.Spec.Containers[i].Args
 			for i := range args {
 				if strings.HasPrefix(args[i], PrometheusConfigReloaderFlag) && f.config.Images.PrometheusConfigReloader != "" {
@@ -2261,6 +2280,10 @@ func (f *Factory) PrometheusOperatorUserWorkloadDeployment() (*appsv1.Deployment
 		case "prometheus-operator":
 			d.Spec.Template.Spec.Containers[i].Image = f.config.Images.PrometheusOperator
 
+			if f.config.UserWorkloadConfiguration.PrometheusOperator.Resources != nil {
+				d.Spec.Template.Spec.Containers[i].Resources = *f.config.UserWorkloadConfiguration.PrometheusOperator.Resources
+			}
+
 			args := d.Spec.Template.Spec.Containers[i].Args
 			for i := range args {
 				if strings.HasPrefix(args[i], PrometheusConfigReloaderFlag) {
@@ -2884,6 +2907,10 @@ func (f *Factory) TelemeterClientDeployment(proxyCABundleCM *v1.ConfigMap, s *v1
 		case "telemeter-client":
 			d.Spec.Template.Spec.Containers[i].Image = f.config.Images.TelemeterClient
 
+			if f.config.ClusterMonitoringConfiguration.TelemeterClientConfig.Resources != nil {
+				d.Spec.Template.Spec.Containers[i].Resources = *f.config.ClusterMonitoringConfiguration.TelemeterClientConfig.Resources
+			}
+
 			if f.config.ClusterMonitoringConfiguration.TelemeterClientConfig.ClusterID != "" {
 				setContainerEnvironmentVariable(&d.Spec.Template.Spec.Containers[i], "ID", f.config.ClusterMonitoringConfiguration.TelemeterClientConfig.ClusterID)
 			}