Add AlertmanagerMainConfig to monitoring API

Signed-off-by: Mario Fernandez <[email protected]>

config/v1/types_cluster_monitoring.go

@@ -17,6 +17,7 @@ limitations under the License.
 package v1
 
 import (
+	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
@@ -77,6 +78,9 @@ type ClusterMonitoringSpec struct {
 	// userDefined set the deployment mode for user-defined monitoring in addition to the default platform monitoring.
 	// +required
 	UserDefined UserDefinedMonitoring `json:"userDefined"`
+	// alertmanagerMainConfig defines settings for the Alertmanager component in the `openshift-monitoring` namespace.
+	// +required
+	AlertmanagerMainConfig AlertmanagerMainConfig `json:"alertmanagerMainConfig"`
 }
 
 // UserDefinedMonitoring config for user-defined projects.
@@ -101,3 +105,86 @@ const (
 	// UserDefinedNamespaceIsolated enables monitoring for user-defined projects with namespace-scoped tenancy. This ensures that metrics, alerts, and monitoring data are isolated at the namespace level.
 	UserDefinedNamespaceIsolated UserDefinedMode = "NamespaceIsolated"
 )
+
+// The `AlertmanagerMainConfig` resource defines settings for the
+// Alertmanager component in the `openshift-monitoring` namespace.
+type AlertmanagerMainConfig struct {
+	// mode enables or disables the main Alertmanager instance. in the `openshift-monitoring` namespace
+	// Allowed values are "Enabled", "Disabled".
+	// +kubebuilder:validation:Enum:=Enabled;Disabled;""
+	// +required
+	Mode AlertManagerMode `json:"mode"`
+	// userMode 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.
+	// +required
+	UserMode UserAlertManagerMode `json:"userMode"`
+	// logLevel Defines the log level setting for Alertmanager.
+	// The possible values are: `Error`, `Warn`, `Info`, `Debug`.
+	// The default value is `Info`.
+	// +optional
+	// +kubebuilder:default=Info
+	LogLevel string `json:"logLevel,omitempty"`
+	// nodeSelector Defines the nodes on which the Pods are scheduled.
+	// +optional
+	NodeSelector map[string]string `json:"nodeSelector,omitempty"`
+	// resources Defines resource requests and limits for the Alertmanager container.
+	// +optional
+	Resources *v1.ResourceRequirements `json:"resources,omitempty"`
+	// secrets Defines a list of secrets that need to be mounted into the Alertmanager.
+	// The secrets must reside within the same namespace as the Alertmanager object.
+	// They will be added as volumes named secret-<secret-name> and mounted at
+	// /etc/alertmanager/secrets/<secret-name> within the 'alertmanager' container of
+	// the Alertmanager Pods.
+	// +optional
+	Secrets []string `json:"secrets,omitempty"`
+	// tolerations Defines tolerations for the pods.
+	// +optional
+	Tolerations []v1.Toleration `json:"tolerations,omitempty"`
+	// topologySpreadConstraints Defines a pod's topology spread constraints.
+	// +optional
+	TopologySpreadConstraints []v1.TopologySpreadConstraint `json:"topologySpreadConstraints,omitempty"`
+	// volumeClaimTemplate Defines persistent storage for Alertmanager. Use this setting to
+	// configure the persistent volume claim, including storage class, volume
+	// size, and name.
+	// +optional
+	VolumeClaimTemplate v1.PersistentVolumeClaim `json:"volumeClaimTemplate,omitempty"`
+}
+
+// AlertmanagerMode defines mode for AlertManager instance
+// +kubebuilder:validation:Enum="";Enabled;Disabled
+type AlertManagerMode string
+
+const (
+	// AlertManagerEnable enables the main Alertmanager instance. in the `openshift-monitoring` namespace
+	AlertManagerEnabled AlertManagerMode = "Enabled"
+	// AlertManagerDisabled enables the main Alertmanager instance. in the `openshift-monitoring` namespace
+	AlertManagerDisabled AlertManagerMode = "Disabled"
+)
+
+// UserAlertManagerMode defines mode for user-defines namespaced
+// +kubebuilder:validation:Enum="";Enabled;Disabled
+type UserAlertManagerMode string
+
+const (
+	// AlertManagerEnabled enables user-defined namespaces to be selected for `AlertmanagerConfig` lookups. This setting only
+	// applies if the user workload monitoring instance of Alertmanager is not enabled.
+	UserAlertManagerEnabled UserAlertManagerMode = "Enabled"
+	// AlertManagerDisabled 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.
+	UserAlertManagerDisabled UserAlertManagerMode = "Disabled"
+)
+
+// +kubebuilder:validation:Enum="";Error;Warn;Info;Debug
+type LogLevel string
+
+var (
+	Error LogLevel = "error"
+
+	Warn LogLevel = "warn"
+
+	Info LogLevel = "info"
+
+	Debug LogLevel = "debug"
+)