Help Center/ Cloud Eye/ User Guide/ Using the Alarm Function/ Creating Alarm Notification Topics/ Creating a Topic
Updated on 2023-11-08 GMT+08:00
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Creating a Topic

Scenarios

A topic serves as a message sending channel, where publishers and subscribers can interact with each other.

You can create your own topic.

Creating a Topic

  1. Log in to the management console.
  2. In the upper left corner, select a region and project.
  3. In the service list, select Simple Message Notification.

    The SMN console is displayed.

  4. In the navigation pane on the left, choose Topic Management > Topics.

    The Topics page is displayed.

  5. Click Create Topic.

    The Create Topic dialog box is displayed.

  6. Enter a topic name and display name (topic description).
    Table 1 Parameters required for creating a topic

    Parameter

    Description

    Topic Name

    Specifies the topic name, which

    • Contains only letters, digits, hyphens (-), and underscores (_) and must start with a letter or a digit.
    • Must contain 1 to 255 characters.
    • Must be unique and cannot be modified after the topic is created.

    Display Name

    Specifies the message sender name, which must be less than 192 characters.

    NOTE:

    After you specify a display name in Display name<username@example.com> format, the name you specify will be displayed as the email sender. Otherwise, the sender will be username@example.com.

    Tag

    Tags identify cloud resources so that they can be categorized easily and searched quickly.

    • For each resource, each tag key must be unique, and each tag key can have only one tag value.
    • A tag key can contain a maximum of 36 characters, including digits, letters, underscores (_), and hyphens (-).
    • A tag value can contain a maximum of 43 characters, including digits, letters, underscores (_), periods (.), and hyphens (-).
    • You can add up to 10 tags to a topic.
  7. Click OK.

    The topic you created is displayed in the topic list.

    After you create a topic, the system generates a uniform resource name (URN) for the topic, which uniquely identifies the topic and cannot be changed.

  8. Click a topic name to view the topic details and the total number of topic subscriptions.

Follow-up Operations

After you create a topic, add subscriptions. After the subscriptions have been confirmed, alarm notifications will be sent to the subscription endpoints via SMN.