Help Center/ Cloud Eye/ User Guide/ Alarm Management/ Alarm Notifications/ Creating Alarm Notification Topics/ Creating a Topic
Updated on 2025-01-14 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.

    Figure 1 Creating a topic
  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 192 characters or less.

    NOTE:

    After you specify a display name, the sender will be presented in Display name<username@example.com> format, or the sender will be <username@example.com>.

    Tag

    Tags identify cloud resources so that you can categorize and search for your resources easily and quickly.

    • For each resource, each tag key must be unique, and can have only one tag value.
    • A tag key can contain a maximum of 36 characters. It can only include digits, letters, underscores (_), and hyphens (-).
    • A tag value can contain a maximum of 43 characters, including digits, letters, underscores (_), periods (.), and hyphens (-).
    • A maximum of 10 tags can be added 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 the name of the topic you created to view the topic its details.

Follow-up Operations

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