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 EC2 alarms.
 */
export declare enum Ec2RecommendedAlarmsMetrics {
    /**
     * The percentage of physical CPU time that Amazon EC2 uses to run the EC2 instance, which includes
     * time spent to run both the user code and the Amazon EC2 code.
     */
    CPU_UTILIZATION = "CPUUtilization",
    /**
     * Reports whether the instance has passed all status checks in the last minute.
     * This metric can be either 0 (passed) or 1 (failed). By default, this metric is available at
     * a 1-minute frequency at no charge.
     */
    STATUS_CHECK_FAILED = "StatusCheckFailed"
}
/**
 * The common optional configuration for the alarms.
 */
export interface Ec2AlarmBaseConfig extends AlarmBaseProps {
    /**
     * The period over which the specified statistic is applied.
     *
     * @default Duration.minutes(1)
     */
    readonly period?: Duration;
}
/**
 * The common properties for the EC2 Instance alarms.
 */
export interface Ec2InstanceAlarmProps {
    /**
     * The EC2 Instance to monitor.
     */
    readonly instance: ec2.Instance;
}
/**
 * Configuration for the CPUUtilization alarm.
 */
export interface Ec2CpuUtilizationAlarmConfig extends Ec2AlarmBaseConfig {
    /**
     * Typically, you can set the threshold for CPU utilization to 70-80%. However, you can
     * adjust this value based on your acceptable performance level and workload characteristics.
     * For some systems, consistently high CPU utilization may be normal and not indicate a problem,
     * while for others, it may be cause of concern. Analyze historical CPU utilization data to
     * identify the usage, find what CPU utilization is acceptable for your system, and set the
     * threshold accordingly.
     *
     * @default 80
     */
    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 - instanceId + ' - CPUUtilization'
     */
    readonly alarmName?: string;
    /**
     * The description of the alarm.
     *
     * @default - This alarm is used to detect high CPU utilization.
     */
    readonly alarmDescription?: string;
}
/**
 * The properties for the Ec2InstanceCpuUtilizationAlarm construct.
 */
export interface Ec2InstanceCpuUtilizationAlarmProps extends Ec2InstanceAlarmProps, Ec2CpuUtilizationAlarmConfig {
}
/**
 * This alarm helps to monitor the CPU utilization of an EC2 instance.
 *
 * Depending on the application, consistently high utilization levels might be normal. But if performance is degraded,
 * and the application is not constrained by disk I/O, memory, or network resources, then a maxed-out CPU might indicate
 * a resource bottleneck or application performance problems. High CPU utilization might indicate that an upgrade to a
 * more CPU intensive instance is required. If detailed monitoring is enabled, you can change the period to 60 seconds
 * instead of 300 seconds. For more information, see Enable or turn off detailed monitoring for your instances.
 *
 * The alarm is triggered when the percentage exceeds % threshold.
 */
export declare class Ec2InstanceCpuUtilizationAlarm extends cloudwatch.Alarm {
    constructor(scope: IConstruct, id: string, props: Ec2InstanceCpuUtilizationAlarmProps);
}
/**
 * Configuration for the StatusCheckFailed alarm.
 */
export interface Ec2StatusCheckFailedAlarmConfig extends Ec2AlarmBaseConfig {
    /**
     * When a status check fails, the value of this metric is 1. The threshold is set so that whenever the
     * status check fails, the alarm is in ALARM state.
     *
     * @default 1
     */
    readonly threshold?: number;
    /**
     * The number of periods over which data is compared to the specified threshold.
     *
     * @default 2
     */
    readonly evaluationPeriods?: number;
    /**
     * The number of data points that must be breaching to trigger the alarm.
     *
     * @default 2
     */
    readonly datapointsToAlarm?: number;
    /**
     * The alarm name.
     *
     * @default - instanceId + ' - StatusCheckFailed'
     */
    readonly alarmName?: string;
    /**
     * The description of the alarm.
     *
     * @default - This alarm is used to detect the underlying problems with instances, including both system
     * status check failures and instance status check failures.
     */
    readonly alarmDescription?: string;
}
/**
 * The properties for the Ec2InstanceStatusCheckFailedAlarm construct.
 */
export interface Ec2InstanceStatusCheckFailedAlarmProps extends Ec2InstanceAlarmProps, Ec2StatusCheckFailedAlarmConfig {
}
/**
 * This alarm helps to monitor both system status checks and instance status checks.
 *
 * If either type of status check fails, then this alarm should be in ALARM state.
 *
 * The alarm is triggered when the status reported is greater or equal to threshold.
 */
export declare class Ec2InstanceStatusCheckFailedAlarm extends cloudwatch.Alarm {
    constructor(scope: IConstruct, id: string, props: Ec2InstanceStatusCheckFailedAlarmProps);
}
/**
 * Configurations for the recommended alarms for an EC2 Service.
 *
 * Default actions are overridden by the actions specified in the
 * individual alarm configurations.
 */
export interface Ec2InstanceRecommendedAlarmsConfig {
    /**
     * 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?: Ec2RecommendedAlarmsMetrics[];
    /**
     * The resources to exclude from the recommended alarms.
     *
     * Use a resources id to exclude a specific resource.
     */
    readonly excludeResources?: string[];
    /**
     * The configuration for the CPUUtilization alarm.
     */
    readonly configCpuUtilizationAlarm?: Ec2CpuUtilizationAlarmConfig;
    /**
     * The configuration for the StatusCheckFailed alarm.
     */
    readonly configStatusCheckFailedAlarm?: Ec2StatusCheckFailedAlarmConfig;
}
/**
 * Properties for the Ec2InstanceRecommendedAlarms construct.
 */
export interface Ec2InstanceRecommendedAlarmsProps extends Ec2InstanceRecommendedAlarmsConfig {
    /**
     * The EC2 Instance to monitor.
     */
    readonly instance: ec2.Instance;
}
/**
 * A construct that creates the recommended alarms for an EC2 Instance.
 *
 * @see https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Best_Practice_Recommended_Alarms_AWS_Services.html#EC2
 */
export declare class Ec2InstanceRecommendedAlarms extends Construct {
    /**
     * The CPUUtilization alarm.
     */
    readonly alarmCpuUtilization?: Ec2InstanceCpuUtilizationAlarm;
    /**
     * The StatusCheckFailed alarm.
     */
    readonly alarmStatusCheckFailed?: Ec2InstanceStatusCheckFailedAlarm;
    constructor(scope: Construct, id: string, props: Ec2InstanceRecommendedAlarmsProps);
}
/**
 * An extension for the Instance construct that provides methods
 * to create recommended alarms.
 */
export declare class Instance extends ec2.Instance {
    constructor(scope: Construct, id: string, props: ec2.InstanceProps);
    /**
     * Creates an alarm that monitors the CPUUtilization for the EC2 instance.
     */
    alarmCpuUtilization(props?: Ec2CpuUtilizationAlarmConfig): Ec2InstanceCpuUtilizationAlarm;
    /**
     * Creates an alarm that monitors the StatusCheckFailed for the EC2 instance.
     */
    alarmStatusCheckFailed(props?: Ec2StatusCheckFailedAlarmConfig): Ec2InstanceStatusCheckFailedAlarm;
    /**
     * Creates the recommended alarms for the EC2 Instance.
     *
     * @see https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Best_Practice_Recommended_Alarms_AWS_Services.html#EC2
     */
    applyRecommendedAlarms(props?: Ec2InstanceRecommendedAlarmsConfig): Ec2InstanceRecommendedAlarms;
}
/**
 * Configures the recommended alarms for an EC2 Instance.
 *
 * @see https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Best_Practice_Recommended_Alarms_AWS_Services.html#EC2
 */
export declare class Ec2RecommendedAlarmsAspect implements IAspect {
    private readonly props?;
    constructor(props?: Ec2InstanceRecommendedAlarmsConfig | undefined);
    visit(node: IConstruct): void;
}