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    ENS:View and subscribe to ENS system events

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    ENS:View and subscribe to ENS system events

    Last Updated:Sep 08, 2026

    You can use the CloudMonitor console to view event monitoring data for Edge Node Service (ENS). Event monitoring helps you understand the operational status of your ENS services and quickly analyze and diagnose issues.

    Note

    • Event-based alerts are triggered per instance. For example, an event that affects three instances triggers three separate alerts.

    • For a complete list of system events supported by ENS, see ENS system events.

    • We recommend that you subscribe to system events marked as critical.

    Background

    CloudMonitor is a service that monitors Alibaba Cloud resources and internet applications. It provides a unified portal to monitor system events from various cloud services, keeping you informed of your services' operational status through alert notifications. For more information about CloudMonitor, see What is CloudMonitor?.

    You can configure an alert rule in CloudMonitor for any system event to receive timely notifications of events. CloudMonitor supports the following two notification methods:

    • Sending alerts through channels such as SMS messages, emails, and DingTalk robots.

    • Distributing events to services like a message queue, Simple Log Service (SLS), Function Compute, or a webhook for automated, scenario-based event handling.

    Query system events

    1. Log on to the CloudMonitor console.

    2. In the left navigation bar, click Event Center > System Event to go to the System Event page.

    3. On the Event Monitoring tab, select Edge Node Service (ENS) from the Product drop-down list, select an event from the Event Name drop-down list, specify a time range, and then click Search.

    4. In the Actions column, click Details.

    Subscribe to ENS system events

    Create a subscription policy

    This section uses the Disk:Stalled:Executed system event for an ENS instance as an example to demonstrate how to create an event subscription.

    1. Log on to the CloudMonitor console.

    2. In the left-side navigation pane, choose .

      Note

      Alternatively, you can create a subscription policy from the System Events menu. Perform the following steps:

      1. In the left-side navigation pane, choose System Events.

      2. In the Welcome to the New Event Center section, click Create Now.

    3. On the Subscription Policy tab, click Create Subscription Policy.

    4. On the Create Subscription Policy page, configure the following parameters.

      • Basic Information: Enter a name for the subscription policy.

      • Alert Subscription:

        • Subscription Type: Select System Events.

        • Subscription Scope:

          • Product: Select Edge Node Service (ENS)ENS.

          • Event Type: Select Error.

          • Event Name: Select Disk:Stalled:Executed.

          • Event Severity: Select Notification (Info).

          • Application group, Event Content, and Event Resources: Leave these parameters empty to subscribe to the Disk:Stalled:Executed system event for all ENS instances across all application groups in your account.

            Note

            For a list of system events supported by ENS, see ENS system events.

      • Combined Noise Reduction: Keep the default settings.

      • Notification: Create a notification configuration and use the default Custom notification method.

        When you create the notification configuration, enter a name, set Notification settings to Set notification group directly, select a contact group, and then click Submit.

        Note

        For more information about how to create a notification configuration, see Create a notification configuration policy.

        The system automatically sends alert notifications based on the methods specified for the alert contacts in the contact group. For example, if you configure an email address and a phone number for an alert contact and use the default Custom notification method, the contact receives alerts by email, SMS, and phone call.

      • Push and Integration: No configuration is required.

        Note

        For more information about how to create a push channel, see Create a push channel.

    Test the event subscription

    After you create a system event subscription, you can use the test feature to verify that your configured endpoints, such as a message queue, Simple Log Service (SLS), Function Compute, or a webhook, are triggered correctly.

    1. On the Subscription Policy tab, click Debug Event Subscription.

    2. In the Create Event Debugging panel, set Product to Edge Node Service and Name to Disk:Stalled:Executed.

      The system automatically generates the test content in JSON format.

      Sample event content for Disk:Stalled:Executed

      {
    "product": "ENS",
    "resourceId": " acs:ens:cn-xian-telecom:1153803490297601:instance/<resource-id>",
    "level": "CRITICAL",
    "instanceName": "instanceName",
    "regionId": "cn-hangzhou",
    "name": "Disk:Stalled:Executed",
    "content": {
        "reason": "pg_io_hang",
        "errorTime": "2019-04-19 16:48:12",
        "resumeTime": "2019-04-19 16:52:01",
        "disk": [
            "disk1",
            "disk2"
        ],
        "internetIP": "117.34.20.**",
        "instanceId": "i-5glc2r7u8up69tkmd7w3k9***",
        "level": "CRITICAL",
        "regionId": "cn-xian-telecom",
        "regionName": "China Telecom (Xi'an)",
        "eventName": "Disk:Stalled:Executed",
        "status": "Executed",
        "timestamp": 1555663921000
    },
    "status": "Executed"
}

    3. Click Submit.

      The The operation is successful. message is displayed. CloudMonitor then sends a test alert to the contacts specified in the subscription policy.