Cloud Monitor:Manage event subscriptions (Recommended)

Create a subscription policy

This topic uses an example of subscribing to the InstanceRestart:StartedDueToInstanceError system event for an Elastic Compute Service (ECS) instance to demonstrate how to subscribe to an event.

1. Log on to the Cloud Monitor console.

2. In the navigation pane on the left, choose Event Center > Event Subscription.

   Note

   You can also create a subscription policy from the System Event menu. The steps are as follows:

   1. In the navigation pane on the left, choose Event Center > System Event.

   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, set the parameters for the subscription policy.

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

   • Alert Subscription:

     • Set Subscription Type to System Event.

     • In the Subscription Scope section, configure the following parameters: Set Product to ECS, Event Type to Abnormal, Event Name to InstanceRestart:StartedDueToInstanceError, and Event Level to Critical. Leave the Application Group, Event Content, and Event Resource fields empty. This configuration subscribes to the InstanceRestart:StartedDueToInstanceError system event for all ECS instances in all application groups under your account.

       Note

       For more information about the system events supported by ECS, see Elastic Compute Service.

   • Merge and Denoise: Use the default settings.

   • Notification: Create a notification configuration. Use the default notification method for Custom Notification Method.

     When you create a notification configuration, first enter a name for it. Then, set Notification Settings to Directly Set Notification Group, select a Contact Group, and click OK.

     Note

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

     The system sends alert notifications using the notification methods specified for the alert contacts in the alert contact group. For example, if you set a mobile number and an email address for an alert contact and use the default notification method for Custom Notification Method, the alert contact receives notifications by phone call, text message, and email.

   • Push and Integration: No configuration is required.

     Note

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

   Table 1. Subscription policy parameters

   Section	Parameter	Description
   Basic Information	Name	The name of the subscription policy.
   	Description	The description of the subscription policy.
   Alert Subscription	Subscription Type	The type of alert subscription. Valid values: System Event: System events gather fault and O&M events from various cloud products. By subscribing to system events, you can receive timely notifications or trigger external systems when events occur. You need to set the subscription scope for system events, including the following: Product, Event Type, Event Name, Event Level, Application Group, Event Content, and Event Resource. Event Content: Refers to the fields within `Content` in the event details. The input box performs a containment match for keywords. To enter multiple keywords, separate them with commas (,). In whitelist mode, a match is found if any of the keywords are met. In blacklist mode, all keywords must be matched. For example, in whitelist mode, if you enter `re,1754xxxxx651403` in the Event Content input box, all events containing the field `re` or `1754xxxxx651403` are filtered. "content": { "invokeId": "t-bj05sxXXXXXXa5xq8", "repeats": 1, "finishTime": "2025-08-05T17:07:17Z", "commandName": "cmd-2025-08-06", "instanceId": "i-2ze61xxxxxugk0zoh7", "repeatMode": "Once", "playerUid": 1754xxxxx651403, "exitCode": 0, "startTime": "2025-08-05T17:07:14Z", "ownerId": 18250xxxxx44564, "commandId": "c-bj05sxxxxxxog00", "invocationStatus": "Success" } Event Resource: The `ResourceId` corresponding to the cloud product, for example, acs:ecs:cn-shanghai:{uid}:instance/{instanceId}. The input box performs a containment match for keywords. To enter multiple keywords, separate them with commas (,). In whitelist mode, a match is found if any of the keywords are met. In blacklist mode, all keywords must be matched. For example, in whitelist mode, if you enter instanceId_1,instanceId_2 in the Event Resource input box, events with the instance ID `instanceId_1` or `instanceId_2` are filtered. Threshold-based Event: When a threshold-based alert rule meets its conditions, a threshold-based event is triggered in Cloud Monitor. By subscribing to threshold-based events, you can have fine-grained control and customization over alert notifications, such as merging, noise reduction, and custom notification methods. You need to set the subscription scope for threshold-based events, including the following: Product Classification, Metric, Severity Level, and Application Group.
   Merge And Denoise Note If you do not set a merge rule, all alerts accepted by the subscription policy are merged by default.	Merge Content	Select the dimensions for merging from the Subscription Scope of the Subscription Type.
   	Denoise	Reduce the frequency of alert notifications. The options are: Conditional trigger, suppress after trigger: If a notification is triggered a certain number of times (default: 5) within a specific period (default: 5 minutes), a mute period (default: 5 minutes) is entered. During the mute period, no duplicate notifications are sent. After the mute period ends, this process repeats. Direct trigger, suppress after trigger: A notification is sent immediately when an alert is triggered. Then, a mute period (default: 5 minutes) is entered. During the mute period, no duplicate notifications are sent. After the mute period ends, this process repeats. Direct trigger, no suppression (use system default anti-storm settings): A notification is sent immediately when an alert is triggered. Note By default, Cloud Monitor can send a maximum of 50 alert notifications by email within 5 minutes.
   Notification	Notification Configuration	When a system event or threshold-based event meets the alert conditions, notify the alert contacts directly or notify different alert contacts based on the alert level. You can select an existing notification configuration or click Create Notification Configuration to create one. For more information about how to configure the parameters for a notification configuration policy, see Parameters for a notification configuration policy.
   	Custom Notification Method	Customize the alert notification method. Click Modify next to a notification method to change the Notification Template and Alert Level.
   Push And Integration	Push Channel	The push channel for alert notifications. To create a push channel, perform the following steps: Click Create New Push. Select an existing push channel or click Add Channel to create one. For more information about how to configure the parameters of a notification push channel, see Parameters of a notification push channel.

5. Click Submit.

6. Test the event subscription.

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

   2. In the Create Event Test panel, set Product to ECS and Name to InstanceRestart:StartedDueToInstanceError.

      The system automatically generates the test content in JSON format.

   3. Click OK.

      An Operation Is Successful message is displayed. Cloud Monitor automatically sends a test alert notification to the alert contacts based on the notification method in the subscription policy.

View a subscription policy

After you create a subscription policy, you can view its details.

1. Log on to the Cloud Monitor console.

2. In the navigation pane on the left, choose Event Center > Event Subscription.

   Note

   You can also create a subscription policy from the System Event menu. The steps are as follows:

   1. In the navigation pane on the left, choose Event Center > System Event.

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

3. On the Subscription Policy tab, find the target subscription policy and click View in the Actions column.

   In the Subscription Policy Details panel, you can view the basic information, event subscription, Merge and Denoise settings, and notification settings for the policy.

Modify a subscription policy

If an existing subscription policy does not meet your requirements, you can modify it.

1. Log on to the Cloud Monitor console.

2. In the navigation pane on the left, choose Event Center > Event Subscription.

   Note

   You can also create a subscription policy from the System Event menu. The steps are as follows:

   1. In the navigation pane on the left, choose Event Center > System Event.

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

3. On the Subscription Policy tab, find the target subscription policy and click Edit in the Actions column.

4. On the Edit Subscription Policy page, set the parameters for the subscription policy.

   For more information about the parameters for a subscription policy, see Subscription policy parameters.

5. Click Submit.

Delete a subscription policy

After you delete a subscription policy, the alert contacts will no longer receive alert notifications.

1. Log on to the Cloud Monitor console.

2. In the navigation pane on the left, choose Event Center > Event Subscription.

   Note

   You can also create a subscription policy from the System Event menu. The steps are as follows:

   1. In the navigation pane on the left, choose Event Center > System Event.

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

3. On the Subscription Policy tab, find the target subscription policy and click Delete in the Actions column.

4. In the Delete Tip dialog box, click OK.

Disable a subscription policy

The Status of a new subscription policy is Enabled by default. You can disable a subscription policy to temporarily stop receiving alert notifications, for example, during manual system changes. While a policy is disabled, alert contacts will not receive any alert notifications.

1. Log on to the Cloud Monitor console.

2. In the navigation pane on the left, choose Event Center > Event Subscription.

   Note

   You can also create a subscription policy from the System Event menu. The steps are as follows:

   1. In the navigation pane on the left, choose Event Center > System Event.

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

3. On the Subscription Policy tab, find the target subscription policy and click Disable in the Actions column.

4. Click OK.

Enable a subscription policy

You can enable a subscription policy whose Status is Disabled. After you enable the subscription policy, alert notifications are automatically resumed.

1. Log on to the Cloud Monitor console.

2. In the navigation pane on the left, choose Event Center > Event Subscription.

   Note

   You can also create a subscription policy from the System Event menu. The steps are as follows:

   1. In the navigation pane on the left, choose Event Center > System Event.

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

3. On the Subscription Policy tab, use the drop-down list to filter for policies with a disabled status. Then, find the target subscription policy and click Enable in the Actions column.

4. Click OK.

References

• Create a notification configuration policy

• Create a push channel

• Create an alert rule for a system event

• Create an alert rule

• Supported cloud products and their system events