Chapter 15. Config map reference for the Cluster Monitoring Operator 15.1. Cluster Monitoring Operator configuration reference Parts of OpenShift Container Platform cluster monitoring are configurable. The API is accessible by setting parameters defined in various config maps. To configure monitoring components, edit the ConfigMap object named cluster-monitoring-config in the openshift-monitoring namespace. These configurations are defined by ClusterMonitoringConfiguration . To configure monitoring components that monitor user-defined projects, edit the ConfigMap object named user-workload-monitoring-config in the openshift-user-workload-monitoring namespace. These configurations are defined by UserWorkloadConfiguration . The configuration file is always defined under the config.yaml key in the config map data. Important Not all configuration parameters for the monitoring stack are exposed. Only the parameters and fields listed in this reference are supported for configuration. For more information about supported configurations, see Maintenance and support for monitoring . Configuring cluster monitoring is optional. If a configuration does not exist or is empty, default values are used. If the configuration is invalid YAML data, the Cluster Monitoring Operator stops reconciling the resources and reports Degraded=True in the status conditions of the Operator. 15.2. AdditionalAlertmanagerConfig 15.2.1. Description The AdditionalAlertmanagerConfig resource defines settings for how a component communicates with additional Alertmanager instances. 15.2.2. Required apiVersion Appears in: PrometheusK8sConfig , PrometheusRestrictedConfig , ThanosRulerConfig Property Type Description apiVersion string Defines the API version of Alertmanager. Possible values are v1 or v2 . The default is v2 . bearerToken *v1.SecretKeySelector Defines the secret key reference containing the bearer token to use when authenticating to Alertmanager. pathPrefix string Defines the path prefix to add in front of the push endpoint path. scheme string Defines the URL scheme to use when communicating with Alertmanager instances. Possible values are http or https . The default value is http . staticConfigs []string A list of statically configured Alertmanager endpoints in the form of <hosts>:<port> . timeout *string Defines the timeout value used when sending alerts. tlsConfig TLSConfig Defines the TLS settings to use for Alertmanager connections. 15.3. AlertmanagerMainConfig 15.3.1. Description The AlertmanagerMainConfig resource defines settings for the Alertmanager component in the openshift-monitoring namespace. Appears in: ClusterMonitoringConfiguration Property Type Description enabled *bool A Boolean flag that enables or disables the main Alertmanager instance in the openshift-monitoring namespace. The default value is true . enableUserAlertmanagerConfig bool A Boolean flag that enables or disables user-defined namespaces to be selected for AlertmanagerConfig lookups. This setting only applies if the user workload monitoring instance of Alertmanager is not enabled. The default value is false . logLevel string Defines the log level setting for Alertmanager. The possible values are: error , warn , info , debug . The default value is info . nodeSelector map[string]string Defines the nodes on which the Pods are scheduled. resources *v1.ResourceRequirements Defines resource requests and limits for the Alertmanager container. tolerations []v1.Toleration Defines tolerations for the pods. topologySpreadConstraints []v1.TopologySpreadConstraint Defines a pod's topology spread constraints. volumeClaimTemplate *monv1.EmbeddedPersistentVolumeClaim Defines persistent storage for Alertmanager. Use this setting to configure the persistent volume claim, including storage class, volume size, and name. 15.4. AlertmanagerUserWorkloadConfig 15.4.1. Description The AlertmanagerUserWorkloadConfig resource defines the settings for the Alertmanager instance used for user-defined projects. Appears in: UserWorkloadConfiguration Property Type Description enabled bool A Boolean flag that enables or disables a dedicated instance of Alertmanager for user-defined alerts in the openshift-user-workload-monitoring namespace. The default value is false . enableAlertmanagerConfig bool A Boolean flag to enable or disable user-defined namespaces to be selected for AlertmanagerConfig lookup. The default value is false . logLevel string Defines the log level setting for Alertmanager for user workload monitoring. The possible values are error , warn , info , and debug . The default value is info . resources *v1.ResourceRequirements Defines resource requests and limits for the Alertmanager container. nodeSelector map[string]string Defines the nodes on which the pods are scheduled. tolerations []v1.Toleration Defines tolerations for the pods. volumeClaimTemplate *monv1.EmbeddedPersistentVolumeClaim Defines persistent storage for Alertmanager. Use this setting to configure the persistent volume claim, including storage class, volume size and name. 15.5. ClusterMonitoringConfiguration 15.5.1. Description The ClusterMonitoringConfiguration resource defines settings that customize the default platform monitoring stack through the cluster-monitoring-config config map in the openshift-monitoring namespace. Property Type Description alertmanagerMain * AlertmanagerMainConfig AlertmanagerMainConfig defines settings for the Alertmanager component in the openshift-monitoring namespace. enableUserWorkload *bool UserWorkloadEnabled is a Boolean flag that enables monitoring for user-defined projects. k8sPrometheusAdapter * K8sPrometheusAdapter K8sPrometheusAdapter defines settings for the Prometheus Adapter component. kubeStateMetrics * KubeStateMetricsConfig KubeStateMetricsConfig defines settings for the kube-state-metrics agent. prometheusK8s * PrometheusK8sConfig PrometheusK8sConfig defines settings for the Prometheus component. prometheusOperator * PrometheusOperatorConfig PrometheusOperatorConfig defines settings for the Prometheus Operator component. openshiftStateMetrics * OpenShiftStateMetricsConfig OpenShiftMetricsConfig defines settings for the openshift-state-metrics agent. telemeterClient * TelemeterClientConfig TelemeterClientConfig defines settings for the Telemeter Client component. thanosQuerier * ThanosQuerierConfig ThanosQuerierConfig defines settings for the Thanos Querier component. 15.6. DedicatedServiceMonitors 15.6.1. Description You can use the DedicatedServiceMonitors resource to configure dedicated Service Monitors for the Prometheus Adapter Appears in: K8sPrometheusAdapter Property Type Description enabled bool When enabled is set to true , the Cluster Monitoring Operator (CMO) deploys a dedicated Service Monitor that exposes the kubelet /metrics/resource endpoint. This Service Monitor sets honorTimestamps: true and only keeps metrics that are relevant for the pod resource queries of Prometheus Adapter. Additionally, Prometheus Adapter is configured to use these dedicated metrics. Overall, this feature improves the consistency of Prometheus Adapter-based CPU usage measurements used by, for example, the oc adm top pod command or the Horizontal Pod Autoscaler. 15.7. K8sPrometheusAdapter 15.7.1. Description The K8sPrometheusAdapter resource defines settings for the Prometheus Adapter component. Appears in: ClusterMonitoringConfiguration Property Type Description audit *Audit Defines the audit configuration used by the Prometheus Adapter instance. Possible profile values are: Metadata , Request , RequestResponse , and None . The default value is Metadata . nodeSelector map[string]string Defines the nodes on which the pods are scheduled. tolerations []v1.Toleration Defines tolerations for the pods. dedicatedServiceMonitors * DedicatedServiceMonitors Defines dedicated service monitors. 15.8. KubeStateMetricsConfig 15.8.1. Description The KubeStateMetricsConfig resource defines settings for the kube-state-metrics agent. Appears in: ClusterMonitoringConfiguration Property Type Description nodeSelector map[string]string Defines the nodes on which the pods are scheduled. tolerations []v1.Toleration Defines tolerations for the pods. 15.9. OpenShiftStateMetricsConfig 15.9.1. Description The OpenShiftStateMetricsConfig resource defines settings for the openshift-state-metrics agent. Appears in: ClusterMonitoringConfiguration Property Type Description nodeSelector map[string]string Defines the nodes on which the pods are scheduled. tolerations []v1.Toleration Defines tolerations for the pods. 15.10. PrometheusK8sConfig 15.10.1. Description The PrometheusK8sConfig resource defines settings for the Prometheus component. Appears in: ClusterMonitoringConfiguration Property Type Description additionalAlertmanagerConfigs [] AdditionalAlertmanagerConfig Configures additional Alertmanager instances that receive alerts from the Prometheus component. By default, no additional Alertmanager instances are configured. enforcedBodySizeLimit string Enforces a body size limit for Prometheus scraped metrics. If a scraped target's body response is larger than the limit, the scrape will fail. The following values are valid: an empty value to specify no limit, a numeric value in Prometheus size format (such as 64MB ), or the string automatic , which indicates that the limit will be automatically calculated based on cluster capacity. The default value is empty, which indicates no limit. externalLabels map[string]string Defines labels to be added to any time series or alerts when communicating with external systems such as federation, remote storage, and Alertmanager. By default, no labels are added. logLevel string Defines the log level setting for Prometheus. The possible values are: error , warn , info , and debug . The default value is info . nodeSelector map[string]string Defines the nodes on which the pods are scheduled. queryLogFile string Specifies the file to which PromQL queries are logged. This setting can be either a filename, in which case the queries are saved to an emptyDir volume at /var/log/prometheus , or a full path to a location where an emptyDir volume will be mounted and the queries saved. Writing to /dev/stderr , /dev/stdout or /dev/null is supported, but writing to any other /dev/ path is not supported. Relative paths are also not supported. By default, PromQL queries are not logged. remoteWrite [] RemoteWriteSpec Defines the remote write configuration, including URL, authentication, and relabeling settings. resources *v1.ResourceRequirements Defines resource requests and limits for the Prometheus container. retention string Defines the duration for which Prometheus retains data. This definition must be specified using the following regular expression pattern: [0-9]+(ms|s|m|h|d|w|y) (ms = milliseconds, s= seconds,m = minutes, h = hours, d = days, w = weeks, y = years). The default value is 15d . retentionSize string Defines the maximum amount of disk space used by data blocks plus the write-ahead log (WAL). Supported values are B , KB , KiB , MB , MiB , GB , GiB , TB , TiB , PB , PiB , EB , and EiB . By default, no limit is defined. tolerations []v1.Toleration Defines tolerations for the pods. topologySpreadConstraints []v1.TopologySpreadConstraint Defines the pod's topology spread constraints. volumeClaimTemplate *monv1.EmbeddedPersistentVolumeClaim Defines persistent storage for Prometheus. Use this setting to configure the persistent volume claim, including storage class, volume size and name. 15.11. PrometheusOperatorConfig 15.11.1. Description The PrometheusOperatorConfig resource defines settings for the Prometheus Operator component. Appears in: ClusterMonitoringConfiguration , UserWorkloadConfiguration Property Type Description logLevel string Defines the log level settings for Prometheus Operator. The possible values are error , warn , info , and debug . The default value is info . nodeSelector map[string]string Defines the nodes on which the pods are scheduled. tolerations []v1.Toleration Defines tolerations for the pods. 15.12. PrometheusRestrictedConfig 15.12.1. Description The PrometheusRestrictedConfig resource defines the settings for the Prometheus component that monitors user-defined projects. Appears in: UserWorkloadConfiguration Property Type Description additionalAlertmanagerConfigs [] AdditionalAlertmanagerConfig Configures additional Alertmanager instances that receive alerts from the Prometheus component. By default, no additional Alertmanager instances are configured. enforcedLabelLimit *uint64 Specifies a per-scrape limit on the number of labels accepted for a sample. If the number of labels exceeds this limit after metric relabeling, the entire scrape is treated as failed. The default value is 0 , which means that no limit is set. enforcedLabelNameLengthLimit *uint64 Specifies a per-scrape limit on the length of a label name for a sample. If the length of a label name exceeds this limit after metric relabeling, the entire scrape is treated as failed. The default value is 0 , which means that no limit is set. enforcedLabelValueLengthLimit *uint64 Specifies a per-scrape limit on the length of a label value for a sample. If the length of a label value exceeds this limit after metric relabeling, the entire scrape is treated as failed. The default value is 0 , which means that no limit is set. enforcedSampleLimit *uint64 Specifies a global limit on the number of scraped samples that will be accepted. This setting overrides the SampleLimit value set in any user-defined ServiceMonitor or PodMonitor object if the value is greater than enforcedTargetLimit . Administrators can use this setting to keep the overall number of samples under control. The default value is 0 , which means that no limit is set. enforcedTargetLimit *uint64 Specifies a global limit on the number of scraped targets. This setting overrides the TargetLimit value set in any user-defined ServiceMonitor or PodMonitor object if the value is greater than enforcedSampleLimit . Administrators can use this setting to keep the overall number of targets under control. The default value is 0 . externalLabels map[string]string Defines labels to be added to any time series or alerts when communicating with external systems such as federation, remote storage, and Alertmanager. By default, no labels are added. logLevel string Defines the log level setting for Prometheus. The possible values are error , warn , info , and debug . The default setting is info . nodeSelector map[string]string Defines the nodes on which the pods are scheduled. queryLogFile string Specifies the file to which PromQL queries are logged. This setting can be either a filename, in which case the queries are saved to an emptyDir volume at /var/log/prometheus , or a full path to a location where an emptyDir volume will be mounted and the queries saved. Writing to /dev/stderr , /dev/stdout or /dev/null is supported, but writing to any other /dev/ path is not supported. Relative paths are also not supported. By default, PromQL queries are not logged. remoteWrite [] RemoteWriteSpec Defines the remote write configuration, including URL, authentication, and relabeling settings. resources *v1.ResourceRequirements Defines resource requests and limits for the Prometheus container. retention string Defines the duration for which Prometheus retains data. This definition must be specified using the following regular expression pattern: [0-9]+(ms|s|m|h|d|w|y) (ms = milliseconds, s= seconds,m = minutes, h = hours, d = days, w = weeks, y = years). The default value is 15d . retentionSize string Defines the maximum amount of disk space used by data blocks plus the write-ahead log (WAL). Supported values are B , KB , KiB , MB , MiB , GB , GiB , TB , TiB , PB , PiB , EB , and EiB . The default value is nil . tolerations []v1.Toleration Defines tolerations for the pods. volumeClaimTemplate *monv1.EmbeddedPersistentVolumeClaim Defines persistent storage for Prometheus. Use this setting to configure the storage class and size of a volume. 15.13. RemoteWriteSpec 15.13.1. Description The RemoteWriteSpec resource defines the settings for remote write storage. 15.13.2. Required url Appears in: PrometheusK8sConfig , PrometheusRestrictedConfig Property Type Description authorization *monv1.SafeAuthorization Defines the authorization settings for remote write storage. basicAuth *monv1.BasicAuth Defines basic authentication settings for the remote write endpoint URL. bearerTokenFile string Defines the file that contains the bearer token for the remote write endpoint. However, because you cannot mount secrets in a pod, in practice you can only reference the token of the service account. headers map[string]string Specifies the custom HTTP headers to be sent along with each remote write request. Headers set by Prometheus cannot be overwritten. metadataConfig *monv1.MetadataConfig Defines settings for sending series metadata to remote write storage. name string Defines the name of the remote write queue. This name is used in metrics and logging to differentiate queues. If specified, this name must be unique. oauth2 *monv1.OAuth2 Defines OAuth2 authentication settings for the remote write endpoint. proxyUrl string Defines an optional proxy URL. queueConfig *monv1.QueueConfig Allows tuning configuration for remote write queue parameters. remoteTimeout string Defines the timeout value for requests to the remote write endpoint. sigv4 *monv1.Sigv4 Defines AWS Signature Version 4 authentication settings. tlsConfig *monv1.SafeTLSConfig Defines TLS authentication settings for the remote write endpoint. url string Defines the URL of the remote write endpoint to which samples will be sent. writeRelabelConfigs []monv1.RelabelConfig Defines the list of remote write relabel configurations. 15.14. TelemeterClientConfig 15.14.1. Description The TelemeterClientConfig resource defines settings for the telemeter-client component. 15.14.2. Required nodeSelector tolerations Appears in: ClusterMonitoringConfiguration Property Type Description nodeSelector map[string]string Defines the nodes on which the pods are scheduled. tolerations []v1.Toleration Defines tolerations for the pods. 15.15. ThanosQuerierConfig 15.15.1. Description The ThanosQuerierConfig resource defines settings for the Thanos Querier component. Appears in: ClusterMonitoringConfiguration Property Type Description enableRequestLogging bool A Boolean flag that enables or disables request logging. The default value is false . logLevel string Defines the log level setting for Thanos Querier. The possible values are error , warn , info , and debug . The default value is info . nodeSelector map[string]string Defines the nodes on which the pods are scheduled. resources *v1.ResourceRequirements Defines resource requests and limits for the Thanos Querier container. tolerations []v1.Toleration Defines tolerations for the pods. 15.16. ThanosRulerConfig 15.16.1. Description The ThanosRulerConfig resource defines configuration for the Thanos Ruler instance for user-defined projects. Appears in: UserWorkloadConfiguration Property Type Description additionalAlertmanagerConfigs [] AdditionalAlertmanagerConfig Configures how the Thanos Ruler component communicates with additional Alertmanager instances. The default value is nil . logLevel string Defines the log level setting for Thanos Ruler. The possible values are error , warn , info , and debug . The default value is info . nodeSelector map[string]string Defines the nodes on which the Pods are scheduled. resources *v1.ResourceRequirements Defines resource requests and limits for the Thanos Ruler container. retention string Defines the duration for which Prometheus retains data. This definition must be specified using the following regular expression pattern: [0-9]+(ms|s|m|h|d|w|y) (ms = milliseconds, s= seconds,m = minutes, h = hours, d = days, w = weeks, y = years). The default value is 15d . tolerations []v1.Toleration Defines tolerations for the pods. topologySpreadConstraints []v1.TopologySpreadConstraint Defines topology spread constraints for the pods. volumeClaimTemplate *monv1.EmbeddedPersistentVolumeClaim Defines persistent storage for Thanos Ruler. Use this setting to configure the storage class and size of a volume. 15.17. TLSConfig 15.17.1. Description The TLSConfig resource configures the settings for TLS connections. 15.17.2. Required insecureSkipVerify Appears in: AdditionalAlertmanagerConfig Property Type Description ca *v1.SecretKeySelector Defines the secret key reference containing the Certificate Authority (CA) to use for the remote host. cert *v1.SecretKeySelector Defines the secret key reference containing the public certificate to use for the remote host. key *v1.SecretKeySelector Defines the secret key reference containing the private key to use for the remote host. serverName string Used to verify the hostname on the returned certificate. insecureSkipVerify bool When set to true , disables the verification of the remote host's certificate and name. 15.18. UserWorkloadConfiguration 15.18.1. Description The UserWorkloadConfiguration resource defines the settings responsible for user-defined projects in the user-workload-monitoring-config config map in the openshift-user-workload-monitoring namespace. You can only enable UserWorkloadConfiguration after you have set enableUserWorkload to true in the cluster-monitoring-config config map under the openshift-monitoring namespace. Property Type Description alertmanager * AlertmanagerUserWorkloadConfig Defines the settings for the Alertmanager component in user workload monitoring. prometheus * PrometheusRestrictedConfig Defines the settings for the Prometheus component in user workload monitoring. prometheusOperator * PrometheusOperatorConfig Defines the settings for the Prometheus Operator component in user workload monitoring. thanosRuler * ThanosRulerConfig Defines the settings for the Thanos Ruler component in user workload monitoring.

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