import { IAspect, aws_ec2 as ec2, aws_cloudwatch as cloudwatch, Duration } from 'aws-cdk-lib';
import { Construct, IConstruct } from 'constructs';
import { AlarmBaseProps } from './common';
/**
 * The recommended metrics for VPN alarms.
 */
export declare enum VpnRecommendedAlarmsMetrics {
    /**
     * Percentage of how close a file system is to reaching the I/O limit of the General Purpose
     * performance mode.
     */
    TUNNEL_STATE = "TunnelState"
}
/**
 * The common optional configuration for the alarms.
 */
export interface VpnAlarmBaseConfig extends AlarmBaseProps {
    /**
     * The period over which the specified statistic is applied.
     *
     * @default Duration.minutes(5)
     */
    readonly period?: Duration;
}
/**
 * The common properties for the VpnConnection alarms.
 */
export interface VpnConnectionAlarmProps {
    /**
     * The VpnConnection to monitor.
     */
    readonly vpnConnection: ec2.CfnVPNConnection;
}
/**
 * Configuration for the TunnelState alarm.
 */
export interface VpnTunnelStateAlarmConfig extends VpnAlarmBaseConfig {
    /**
     * A value less than 1 indicates that at least one tunnel is in DOWN state.
     *
     * @default 1
     */
    readonly threshold?: number;
    /**
     * The number of periods over which data is compared to the specified threshold.
     *
     * @default 3
     */
    readonly evaluationPeriods?: number;
    /**
     * The number of data points that must be breaching to trigger the alarm.
     *
     * @default 3
     */
    readonly datapointsToAlarm?: number;
    /**
     * The alarm name.
     *
     * @default - vpnConnectionId + ' - TunnelState'
     */
    readonly alarmName?: string;
    /**
     * The description of the alarm.
     *
     * @default - This alarm is used to detect if at least one tunnel is in the DOWN state for this VPN, so that you can troubleshoot
     * the impacted VPN. This alarm will always be in the ALARM state for networks that only have a single tunnel configured.
     */
    readonly alarmDescription?: string;
}
/**
 * The properties for the VpnConnectionTunnelStateAlarm construct.
 */
export interface VpnConnectionTunnelStateAlarmProps extends VpnConnectionAlarmProps, VpnTunnelStateAlarmConfig {
}
/**
 * This alarm helps you understand if the state of one or more tunnels is DOWN.
 *
 * For troubleshooting, see VPN tunnel troubleshooting.
 *
 * The alarm is triggered when the monitored value is less than 1.
 */
export declare class VpnConnectionTunnelStateAlarm extends cloudwatch.Alarm {
    constructor(scope: IConstruct, id: string, props: VpnConnectionTunnelStateAlarmProps);
}
/**
 * Configurations for the recommended alarms for an VPN Service.
 *
 * Default actions are overridden by the actions specified in the
 * individual alarm configurations.
 */
export interface VpnConnectionRecommendedAlarmsConfig {
    /**
     * The default action to take when an alarm is triggered.
     *
     * @default - None
     */
    readonly defaultAlarmAction?: cloudwatch.IAlarmAction;
    /**
     * The default action to take when an alarm enters the ok state.
     *
     * @default - None
     */
    readonly defaultOkAction?: cloudwatch.IAlarmAction;
    /**
     * The default action to take when an alarm has insufficient data.
     *
     * @default - None
     */
    readonly defaultInsufficientDataAction?: cloudwatch.IAlarmAction;
    /**
     * How to handle missing data for this alarm.
     *
     * @default TreatMissingData.MISSING
     */
    readonly treatMissingData?: cloudwatch.TreatMissingData;
    /**
     * Alarm metrics to exclude from the recommended alarms.
     *
     * @default - None
     */
    readonly excludeAlarms?: VpnRecommendedAlarmsMetrics[];
    /**
     * The resources to exclude from the recommended alarms.
     *
     * Use a resources id to exclude a specific resource.
     */
    readonly excludeResources?: string[];
    /**
     * The configuration for the TunnelState alarm.
     */
    readonly configTunnelStateAlarm?: VpnTunnelStateAlarmConfig;
}
/**
 * Properties for the VpnConnectionRecommendedAlarms construct.
 */
export interface VpnConnectionRecommendedAlarmsProps extends VpnConnectionRecommendedAlarmsConfig {
    /**
     * The VpnConnection to monitor.
     */
    readonly vpnConnection: ec2.CfnVPNConnection;
}
/**
 * A construct that creates the recommended alarms for an VpnConnection.
 *
 * @see https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Best_Practice_Recommended_Alarms_AWS_Services.html#VPN
 */
export declare class VpnConnectionRecommendedAlarms extends Construct {
    /**
     * The TunnelState alarm.
     */
    readonly alarmTunnelState?: VpnConnectionTunnelStateAlarm;
    constructor(scope: Construct, id: string, props: VpnConnectionRecommendedAlarmsProps);
}
/**
 * An extension for the CfnVPNConnection construct that provides methods
 * to create recommended alarms.
 */
export declare class VpnConnection extends ec2.CfnVPNConnection {
    constructor(scope: Construct, id: string, props: ec2.CfnVPNConnectionProps);
    /**
     * Creates an alarm that monitors the TunnelState for the VPN vpnConnection.
     */
    alarmTunnelState(props?: VpnTunnelStateAlarmConfig): VpnConnectionTunnelStateAlarm;
    /**
     * Creates the recommended alarms for the VpnConnection.
     *
     * @see https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Best_Practice_Recommended_Alarms_AWS_Services.html#VPN
     */
    applyRecommendedAlarms(props?: VpnConnectionRecommendedAlarmsConfig): VpnConnectionRecommendedAlarms;
}
/**
 * Configures the recommended alarms for an VpnConnection.
 *
 * @see https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Best_Practice_Recommended_Alarms_AWS_Services.html#VPN
 */
export declare class VpnRecommendedAlarmsAspect implements IAspect {
    private readonly props?;
    constructor(props?: VpnConnectionRecommendedAlarmsConfig | undefined);
    visit(node: IConstruct): void;
}