All Products
Search

This Product

    PrivateLink:Monitoring and alerts

    Document Center

    PrivateLink:Monitoring and alerts

    Last Updated:Jun 03, 2026

    PrivateLink integrates with CloudMonitor to monitor endpoints and EPSs. Track bandwidth and packet rate metrics to detect network congestion or packet loss and maintain service stability.

    Monitoring overview

    PrivateLink monitoring covers both service consumers and service providers. The monitored object hierarchy is shown below:

    image

    Monitored objects

    • Endpoint: Created and managed by the service consumer.

      Each endpoint zone has exactly one ENI (one-to-one correspondence).

      • Endpoint instance: The sum of metrics of all its endpoint zones.

      • Endpoint zone: The sum of metrics of all its ENI.

      • Endpoint ENI: The metrics of a specific ENI within a zone.

    • EPS: Created and managed by the service provider.

      • EPS instance: The sum of metrics for all its associated endpoint connections.

      • Service resource: Metrics for a specific backend resource of EPS.

      • Connected endpoint instance: Metrics for an endpoint connected to the EPS, including its zones and ENIs.

        Service providers can view endpoint metrics only through the associated EPS.

    Monitoring metrics

    Each monitored object exposes eight metrics in two categories — bandwidth and packet rate — for assessing network quality.

    Endpoint monitoring metrics

    Object

    Metric

    Monitoring metrics

    Description

    Unit

    Aggregation method

    Endpoint

    VpcEndpointInBps

    Endpoint inbound bandwidth

    The bandwidth for accessing the endpoint from the VPC.

    bit/s

    Average

    VpcEndpointOutBps

    Endpoint outbound bandwidth

    The bandwidth for accessing the VPC from the endpoint.

    bit/s

    Average

    VpcEndpointInPps

    Endpoint inbound packet rate

    The packet rate for accessing the endpoint from the VPC.

    packet/s

    Average

    VpcEndpointOutPps

    Endpoint outbound packet rate

    The packet rate for accessing the VPC from the endpoint.

    packet/s

    Average

    VpcEndpointInDropBps

    Endpoint inbound bandwidth dropped

    The bandwidth dropped when accessing the endpoint from the VPC.

    bit/s

    Average

    VpcEndpointOutDropBps

    Endpoint outbound bandwidth dropped

    The bandwidth dropped when accessing the VPC from the endpoint.

    bit/s

    Average

    VpcEndpointInDropPps

    Endpoint rate of inbound packets dropped

    The rate of packets dropped when accessing the endpoint from the VPC.

    packet/s

    Average

    VpcEndpointOutDropPps

    Endpoint rate of outbound packets dropped

    The rate of packets dropped when accessing the VPC from the endpoint.

    packet/s

    Average

    Endpoint zone

    VpcEndpointZoneInBps

    Endpoint zone inbound bandwidth

    The bandwidth for accessing the endpoint zone from the VPC.

    bit/s

    Average

    VpcEndpointZoneOutBps

    Endpoint zone outbound bandwidth

    The bandwidth for accessing the VPC from the endpoint zone.

    bit/s

    Average

    VpcEndpointZoneInPps

    Endpoint zone inbound packet rate

    The packet rate for accessing the endpoint zone from the VPC.

    packet/s

    Average

    VpcEndpointZoneOutPps

    Endpoint zone outbound packet rate

    The packet rate for accessing the VPC from the endpoint zone.

    packet/s

    Average

    VpcEndpointZoneInDropBps

    Endpoint zone inbound bandwidth dropped

    The bandwidth dropped when accessing the endpoint zone from the VPC.

    bit/s

    Average

    VpcEndpointZoneOutDropBps

    Endpoint zone outbound bandwidth dropped

    The bandwidth dropped when accessing the VPC from the endpoint zone.

    bit/s

    Average

    VpcEndpointZoneInDropPps

    Endpoint zone rate of inbound packets dropped

    The rate of packets dropped when accessing the endpoint zone from the VPC.

    packet/s

    Average

    VpcEndpointZoneOutDropPps

    Endpoint zone rate of outbound packets dropped

    The rate of packets dropped when accessing the VPC from the endpoint zone.

    packet/s

    Average

    Endpoint ENI

    VpcEndpointENIInBps

    Endpoint ENI inbound bandwidth

    The bandwidth for accessing the ENI attached to the endpoint zone from the VPC.

    bit/s

    Average

    VpcEndpointENIOutBps

    Endpoint ENI outbound bandwidth

    The bandwidth for accessing the VPC from the ENI attached to the endpoint zone.

    bit/s

    Average

    VpcEndpointENIInPps

    Endpoint ENI inbound packet rate

    The packet rate for accessing the ENI attached to the endpoint zone from the VPC.

    packet/s

    Average

    VpcEndpointENIOutPps

    Endpoint ENI outbound packet rate

    The packet rate for accessing the VPC from the ENI attached to the endpoint zone.

    packet/s

    Average

    VpcEndpointENIInDropBps

    Endpoint ENI inbound bandwidth dropped

    The bandwidth dropped when accessing the ENI attached to the endpoint zone from the VPC.

    bit/s

    Average

    VpcEndpointENIOutDropBps

    Endpoint ENI outbound bandwidth dropped

    The bandwidth dropped when accessing the VPC from the ENI attached to the endpoint zone.

    bit/s

    Average

    VpcEndpointENIInDropPps

    Endpoint ENI rate of inbound packets dropped

    The rate of packets dropped when accessing the ENI attached to the endpoint zone from the VPC.

    packet/s

    Average

    VpcEndpointENIOutDropPps

    Endpoint ENI rate of outbound packets dropped

    The rate of packets dropped when accessing the VPC from the ENI attached to the endpoint zone.

    packet/s

    Average

    EPS monitoring metrics

    Monitored object

    Metric

    Monitoring metrics

    Description

    Unit

    Aggregation method

    EPS instance

    VpcEndpointServiceInBps

    EPS inbound bandwidth

    The bandwidth for accessing the EPS from the VPC.

    bit/s

    Average

    VpcEndpointServiceOutBps

    EPS outbound bandwidth

    The bandwidth for accessing the VPC from the EPS.

    bit/s

    Average

    VpcEndpointServiceInPps

    EPS inbound packet rate

    The packet rate for accessing the EPS from the VPC.

    packet/s

    Average

    VpcEndpointServiceOutPps

    EPS outbound packet rate

    The packet rate for accessing the VPC from the EPS.

    packet/s

    Average

    VpcEndpointServiceInDropBps

    EPS inbound bandwidth dropped

    The bandwidth dropped when accessing the EPS from the VPC.

    bit/s

    Average

    VpcEndpointServiceOutDropBps

    EPS outbound bandwidth dropped

    The bandwidth dropped when accessing the VPC from the EPS.

    bit/s

    Average

    VpcEndpointServiceInDropPps

    EPS rate of inbound packets dropped

    The rate of packets dropped when accessing the EPS from the VPC.

    packet/s

    Average

    VpcEndpointServiceOutDropPps

    EPS rate of outbound packets dropped

    The rate of packets dropped when accessing the VPC from the EPS.

    packet/s

    Average

    Service resource

    VpcEndpointServiceResourceInBps

    Service resource inbound bandwidth

    The bandwidth for accessing the service resource associated with the EPS from the VPC.

    bit/s

    Average

    VpcEndpointServiceResourceOutBps

    Service resource outbound bandwidth

    The bandwidth for accessing the VPC from the service resource associated with the EPS.

    bit/s

    Average

    VpcEndpointServiceResourceInPps

    Service resource inbound packet rate

    The packet rate for accessing the service resource associated with the EPS from the VPC.

    packet/s

    Average

    VpcEndpointServiceResourceOutPps

    Service resource outbound packet rate

    The packet rate for accessing the VPC from the service resource associated with the EPS.

    packet/s

    Average

    VpcEndpointServiceResourceInDropBps

    Service resource inbound bandwidth dropped

    The bandwidth dropped when accessing the service resource associated with the EPS from the VPC.

    bit/s

    Average

    VpcEndpointServiceResourceOutDropBps

    Service resource outbound bandwidth dropped

    The bandwidth dropped when accessing the VPC from the service resource associated with the EPS.

    bit/s

    Average

    VpcEndpointServiceResourceInDropPps

    Service resource rate of inbound packets dropped

    The rate of packets dropped when accessing the service resource associated with the EPS from the VPC.

    packet/s

    Average

    VpcEndpointServiceResourceOutDropPps

    Service resource rate of outbound packets dropped

    The rate of packets dropped when accessing the VPC from the service resource associated with the EPS.

    packet/s

    Average

    Endpoint instance of EPS connection

    VpcEndpointServiceEndpointInBps

    Endpoint inbound bandwidth under the EPS

    The bandwidth for accessing the endpoint under the EPS from the VPC.

    bit/s

    Average

    VpcEndpointServiceEndpointOutBps

    Endpoint outbound bandwidth under the EPS

    The bandwidth for accessing the VPC from the endpoint under the EPS.

    bit/s

    Average

    VpcEndpointServiceEndpointInPps

    Endpoint inbound packet rate under the EPS

    The packet rate for accessing the endpoint under the EPS from the VPC.

    packet/s

    Average

    VpcEndpointServiceEndpointOutPps

    Endpoint outbound packet rate under the EPS

    The packet rate for accessing the VPC from the endpoint under the EPS.

    packet/s

    Average

    VpcEndpointServiceEndpointInDropBps

    Endpoint inbound bandwidth dropped under the EPS

    The bandwidth dropped when accessing the endpoint under the EPS from the VPC.

    bit/s

    Average

    VpcEndpointServiceEndpointOutDropBps

    Endpoint outbound bandwidth dropped under the EPS

    The bandwidth dropped when accessing the VPC from the endpoint under the EPS.

    bit/s

    Average

    VpcEndpointServiceEndpointInDropPps

    Rate of inbound packets dropped of the endpoint under the EPS

    The rate of packets dropped when accessing the endpoint under the EPS from the VPC.

    packet/s

    Average

    VpcEndpointServiceEndpointOutDropPps

    Rate of outbound packets dropped of the endpoint under the EPS

    The rate of packets dropped when accessing the VPC from the endpoint under the EPS.

    packet/s

    Average

    Endpoint zone of EPS connection

    VpcEndpointServiceEndpointZoneInBps

    Endpoint zone inbound bandwidth under the EPS

    The bandwidth for accessing the endpoint zone under the EPS from the VPC.

    bit/s

    Average

    VpcEndpointServiceEndpointZoneOutBps

    Endpoint zone outbound bandwidth under the EPS

    The bandwidth for accessing the VPC from the endpoint zone under the EPS.

    bit/s

    Average

    VpcEndpointServiceEndpointZoneInPps

    Endpoint zone inbound packet rate under the EPS

    The packet rate for accessing the endpoint zone under the EPS from the VPC.

    packet/s

    Average

    VpcEndpointServiceEndpointZoneOutPps

    Endpoint zone outbound packet rate under the EPS

    The packet rate for accessing the VPC from the endpoint zone under the EPS.

    packet/s

    Average

    VpcEndpointServiceEndpointZoneInDropBps

    Endpoint zone inbound bandwidth dropped under the EPS

    The bandwidth dropped when accessing the endpoint zone under the EPS from the VPC.

    bit/s

    Average

    VpcEndpointServiceEndpointZoneOutDropBps

    Endpoint zone outbound bandwidth dropped under the EPS

    The bandwidth dropped when accessing the VPC from the endpoint zone under the EPS.

    bit/s

    Average

    VpcEndpointServiceEndpointZoneInDropPps

    Rate of inbound packets dropped of the endpoint zone under the EPS

    The rate of packets dropped when accessing the endpoint zone under the EPS from the VPC.

    packet/s

    Average

    VpcEndpointServiceEndpointZoneOutDropPps

    Rate of outbound packets dropped of the endpoint zone under the EPS

    The rate of packets dropped when accessing the VPC from the endpoint zone under the EPS.

    packet/s

    Average

    Endpoint ENI of EPS connection

    VpcEndpointServiceEndpointEniInBps

    Inbound bandwidth of the endpoint ENI under the EPS

    The bandwidth for accessing the endpoint zone ENI under the EPS from the VPC.

    bit/s

    Average

    VpcEndpointServiceEndpointEniOutBps

    Outbound bandwidth of the endpoint ENI under the EPS

    The bandwidth for accessing the VPC from the endpoint zone ENI under the EPS.

    bit/s

    Average

    VpcEndpointServiceEndpointEniInPps

    Inbound packet rate of the endpoint ENI under the EPS

    The packet rate for accessing the endpoint zone ENI under the EPS from the VPC.

    packet/s

    Average

    VpcEndpointServiceEndpointEniOutPps

    Outbound packet rate of the endpoint ENI under the EPS

    The packet rate for accessing the VPC from the endpoint zone ENI under the EPS.

    packet/s

    Average

    VpcEndpointServiceEndpointEniInDropBps

    Inbound bandwidth dropped of the endpoint ENI under the EPS

    The bandwidth dropped when accessing the endpoint zone ENI under the EPS from the VPC.

    bit/s

    Average

    VpcEndpointServiceEndpointEniOutDropBps

    Outbound bandwidth dropped of the endpoint ENI under the EPS

    The bandwidth dropped when accessing the VPC from the endpoint zone ENI under the EPS.

    bit/s

    Average

    VpcEndpointServiceEndpointEniInDropPps

    Rate of inbound packets dropped of the endpoint ENI under the EPS

    The rate of packets dropped when accessing the endpoint zone ENI under the EPS from the VPC.

    packet/s

    Average

    VpcEndpointServiceEndpointEniOutDropPps

    Rate of outbound packets dropped of the endpoint ENI under the EPS

    The rate of packets dropped when accessing the VPC from the endpoint zone ENI under the EPS.

    packet/s

    Average

    View instance monitoring

    View monitoring charts from the PrivateLink console or the CloudMonitor console.

    By default, charts show the last hour of data. Select a longer time range as needed.

    Service consumer: View endpoint monitoring

    • Go to the Endpoints page. In the top menu bar, select the region of the instance. In the Monitor column for the target endpoint, click the image icon, or click the instance ID and then click the Monitor tab.

    • Go to the CloudMonitor console - Endpoint page and select the region of the instance. Click the target endpoint ID or Monitoring Charts in the Actions column.

    Service provider: View EPS monitoring

    • Go to the Endpoint Service console. In the top menu bar, select the region of the instance. In the Monitor column for the target Endpoint Service, click the image icon, or click the instance ID and then click the Monitor tab.

    • Go to the CloudMonitor console - Endpoint services page and select the region of the instance. Click the target Endpoint Service ID or Monitoring Charts in the Actions column.

    Alert subscription

    Set threshold alerts on key metrics or subscribe to system events for automatic status monitoring.

    Set metric threshold alerts

    Create alert rules to detect when metrics exceed thresholds (for example, bandwidth limits). CloudMonitor sends notifications when alert conditions are met.

    1. On the CloudMonitor console - Alert Rules page, click Create Alert Rule.

    2. For Product, select PrivateLink-Endpoint or PrivateLink-Endpoint services. Then, add a rule and configure metric thresholds for each alert level.

    3. When a metric reaches its threshold, the specified Alert Contact Group receives a notification. To view an alert's history, find the rule and click Alert History in the Actions column.

    4. You can Modify, Disable, or Delete a rule at any time from the Actions column.

    Subscribe to system events

    PrivateLink emits system events when endpoint connection status changes (accepted, rejected, or deleted). Create a subscription policy to receive notifications.

    1. On the CloudMonitor console - Event Subscription page, click Create Subscription Policy.

    2. For Subscription Type, select System Events. For Products, select PrivateLink. Then, select the events you want to subscribe to.

    3. Customize the alert notifications:

      • Noise reduction: Consolidate and filter alerts by subscription scope to prevent alert storms from duplicate notifications.

      • Alert escalation: CloudMonitor sends notifications to the specified alert contact. If the alert is not resolved within a specified time, it escalates the notification to the next contact group.

      • Custom notification methods: Define notification channel levels and templates. Push alert data to Simple Message Queue (formerly MNS), Simple Log Service (SLS), Function Compute (FC), or a webhook.

    4. You can Edit, Disable, or Delete a policy at any time from the Actions column.

    System events

    PrivateLink system events

    Event name

    Event information

    Example

    Endpoint:Connection:Accept

    Description: The endpoint connection is accepted.

    Level: INFO

    Type: Accept

    		 
    {
    "product": "event_privatelink",
    "resourceId": "acs:privatelink:ap-northeast-1:1754923513653316:<resource-id>",
    "level": "INFO",
    "instanceName": "instanceName",
    "regionId": "cn-hangzhou",
    "name": "Endpoint:Connection:Accept",
    "content": {
        "message": "Ac***"
    },
    "status": "Executed"
}

    Endpoint:Connection:Reject

    Description: The endpoint connection is rejected.

    Level: INFO

    Type: Reject

    		 
    {
    "product": "event_privatelink",
    "resourceId": "acs:privatelink:cn-shenzhen:1754923513653316:<resource-id>",
    "level": "INFO",
    "instanceName": "instanceName",
    "regionId": "cn-hangzhou",
    "name": "Endpoint:Connection:Reject",
    "content": {
        "message": "Re***"
    },
    "status": "Executed"
}

    Endpoint:Connection:Zone:Accept

    Description: A connection is established for a new endpoint zone.

    Level: INFO

    Type: Accept

    		 
    {
    "product": "event_privatelink",
    "resourceId": "acs:privatelink:cn-guangzhou:1754923513653316:<resource-id>",
    "level": "INFO",
    "instanceName": "instanceName",
    "regionId": "cn-hangzhou",
    "name": "Endpoint:Connection:Zone:Accept",
    "content": {
        "message": "Ac***"
    },
    "status": "Executed"
}

    Endpoint:Connection:Zone:Delete

    Description: The endpoint connection zone is deleted.

    Level: INFO

    Type: Delete

    		 
    {
    "product": "event_privatelink",
    "resourceId": "acs:privatelink:cn-shanghai-finance-1:1754923513653316:<resource-id>",
    "level": "INFO",
    "instanceName": "instanceName",
    "regionId": "cn-hangzhou",
    "name": "Endpoint:Connection:Zone:Delete",
    "content": {
        "message": "De***"
    },
    "status": "Executed"
}

    Service:Connection:Auto_Accept

    Description: Automatically accept endpoint connections.

    Level: CRITICAL

    Type: Accept

    		 
    {
    "product": "event_privatelink",
    "resourceId": "acs:privatelink:us-east-1:1754923513653316:<resource-id>",
    "level": "CRITICAL",
    "instanceName": "instanceName",
    "regionId": "cn-hangzhou",
    "name": "Service:Connection:Auto_Accept",
    "content": {
        "message": "Ac***"
    },
    "status": "Executed"
}

    Service:Connection:Delete

    Description: The endpoint connection is deleted.

    Level: INFO

    Type: Delete

    		 
    {
    "product": "event_privatelink",
    "resourceId": "acs:privatelink:us-east-1:1754923513653316:<resource-id>",
    "level": "INFO",
    "instanceName": "instanceName",
    "regionId": "cn-hangzhou",
    "name": "Service:Connection:Delete",
    "content": {
        "message": "De***"
    },
    "status": "Executed"
}

    Service:Connection:Manual_Accept

    Description: Manually accept endpoint connections.

    Level: INFO

    Type: Accept

    		 
    {
    "product": "event_privatelink",
    "resourceId": "acs:privatelink:cn-shenzhen:1754923513653316:<resource-id>",
    "level": "INFO",
    "instanceName": "instanceName",
    "regionId": "cn-hangzhou",
    "name": "Service:Connection:Manual_Accept",
    "content": {
        "message": "Ac***"
    },
    "status": "Executed"
}

    Service:Connection:Reject

    Description: Reject endpoint connection.

    Level: INFO

    Type: Reject

    		 
    {
    "product": "event_privatelink",
    "resourceId": "acs:privatelink:us-east-1:1754923513653316:<resource-id>",
    "level": "INFO",
    "instanceName": "instanceName",
    "regionId": "cn-hangzhou",
    "name": "Service:Connection:Reject",
    "content": {
        "message": "Re***"
    },
    "status": "Executed"
}

    Service:Connection:Zone:Accept

    Description: The endpoint connection zone is accepted.

    Level: INFO

    Type: Accept

    		 
    {
    "product": "event_privatelink",
    "resourceId": "acs:privatelink:us-east-1:1754923513653316:<resource-id>",
    "level": "INFO",
    "instanceName": "instanceName",
    "regionId": "cn-hangzhou",
    "name": "Service:Connection:Zone:Accept",
    "content": {
        "message": "Ac***"
    },
    "status": "Executed"
}

    Service:Connection:Zone:Delete

    Description: The endpoint connection zone is deleted.

    Level: INFO

    Type: Delete

    		 
    {
    "product": "event_privatelink",
    "resourceId": "acs:privatelink:cn-shanghai-finance-1:1754923513653316:<resource-id>",
    "level": "INFO",
    "instanceName": "instanceName",
    "regionId": "cn-hangzhou",
    "name": "Service:Connection:Zone:Delete",
    "content": {
        "message": "De***"
    },
    "status": "Executed"
}

    Parameter

    Description

    Example

    product

    The Alibaba Cloud service to which the system event belongs.

    event_privatelink

    resourceId

    The affected resource.

    Starts with acs:privatelink: and contains information such as the instance region, Alibaba Cloud account ID, and instance ID.

    acs:privatelink:ap-northeast-1:175492351365****:<resource-id>

    level

    The level of the system event.

    • CRITICAL: Severe.

    • INFO: Note.

    INFO

    instanceName

    The name of the affected instance.

    instanceName

    regionId

    The region where the affected instance is located.

    cn-hangzhou

    name

    The name of the system event.

    Endpoint:Connection:Accept

    content

    The content of the system event.

    Ac***

    status

    System event status: Executed (Execution completed).

    Executed