Event Notifications

Creating an SMN Topic

1. Log in to the SMN console.
2. In the navigation pane on the left, choose Topic Management > Topics.
3. Click Create Topic in the upper right corner.
   The Create Topic dialog box is displayed. Table 1 describes the required parameters.

   Table 1 Topic parameters

   Parameter	Description
   Topic Name	Specifies the topic name, which Contains only letters, digits, hyphens (-), and underscores (_), and must start with a letter or digit. Contains 1 to 255 characters. Must be unique and cannot be modified after the topic is created.
   Display Name	This parameter is optional. When sending an email: If the display name is not specified, the sender is displayed as username@example.com. If the display name is specified, the email sender is presented as Display name<username@example.com>.
   Enterprise Project	Centrally manages cloud resources and members by project.
   Tag	Specifies a key-value pair. Tags identify cloud resources so that you can easily categorize and search for your resources.

4. Click OK.
5. Click Add Subscription in the Operation column of the new topic. The Add Subscription dialog box is displayed.
   Configure the subscription protocol and endpoints. See Figure 1.

   Figure 1 Adding a subscription
   

   Table 2 describes the subscription parameters.

   Table 2 Subscription parameters

   Parameter	Description
   Topic Name	Name of the topic to be subscribed to. Retain the default value.
   Protocol	Message notification method. Select a protocol from the drop-down list. The common protocols used by MPC are SMS, Email, HTTP, and HTTPS.
   Endpoint	Specifies the IP address of a subscription endpoint. You can enter up to 10 SMS, email, HTTP, or HTTPS endpoints, one in each line. SMS: Enter one or more valid phone numbers. The format is + country code phone number, for example, +8600000000000. Subscribers will receive a subscription confirmation message valid for 48 hours and must confirm the subscription to receive messages published to the topic. Email: Enter one or more valid email addresses, for example, username@example.com. Subscribers will receive a subscription confirmation email valid for 48 hours and must confirm the subscription to receive messages published to the topic. If you select HTTP or HTTPS, enter a public network address and confirm the subscription, for example, https://example.com/notification/action. HTTPS is recommended, as it is more secure than HTTP.

6. Click OK to add a subscription. You can view the subscription on Topic Management > Subscriptions.

   After the subscription is added, the configured subscription endpoint will receive a subscription confirmation message. The subscription confirmation link is valid for 48 hours. You need to confirm the subscription within the validity period so that you can receive messages published to the topic.

Configuring a Topic Policy

1. Log in to the SMN console.
2. In the navigation pane on the left, choose Topic Management > Topics.
3. Click More > Configure Topic Policy in the Operation column of the created topic.
4. Configure topic policy parameters. See Figure 2.
   Figure 2 Configuring a topic policy
   

   On the displayed page, set Policy of the access policy to Basic. In the basic mode, you can only set the permission to publish messages for users and services. See Figure 2.

   Table 3 Description for configuring topic policies in basic mode

   Parameter	Settings	Description
   Users who can publish messages to this topic	Topic creator	Only users under the same account as the topic creator have the permission to publish messages to this topic.
   	All users	All users have the permission to publish messages to the topic.
   	Specified user accounts	Only specified users have the permission to publish messages to the topic. Users are specified in the format of urn:csp:iam::domainId:root, in which domainId indicates the account ID of a user. Every two users are separated with a comma (,). SMN does not limit the number of users you can specify, but the total length of a topic policy cannot exceed 30 KB. NOTE: Enter the account ID of the user and click OK. Other information is automatically supplemented by the system. To obtain a user's account ID, log in to the SMN console, hover the mouse cursor over the username in the upper right corner and choose My Credentials from the drop-down list.
   Services that can publish messages to this topic	An example is MPC. The services that can publish messages to a topic vary depending on regions.	Select MPC. MPC has the permissions to access the topic.

Configuring Event Notifications

1. Log in to the MPC console.
2. In the navigation pane, choose Global Settings > Event Notifications.
   Figure 3 Event notifications
   

3. Select one or more events.
4. Select one or more message types.

   Template Message Body describes a template message body. JSON Message Body describes the fields in a JSON message body.

   

   If Template message and JSON message are both selected, you will receive template messages via SMS and email, and receive JSON messages via HTTP and HTTPS.

5. Select an SMN topic.
6. Click OK.

Template Message Body

• The following is an example of a template message used for transcoding started:

  Dear user, your video transcoding task (task ID: {task_id}) has been started. Log in to the MPC console or call the transcoding API to obtain transcoding details.

• The following is an example of a template message used for a successful transcoding, snapshot, packaging, and animated GIF task:

  Dear user, your video {transcoding/snapshot/packaging/animated GIF} task (task ID: {task_id}) has been completed. Log in to the MPC console or call the transcoding API to obtain details.

• The following is an example of a template message used for a failed transcoding, snapshot, packaging, and animated GIF task:

  Dear user, an error occurs when processing your video {transcoding/snapshot/packaging/animated GIF} task (task ID: {task_id}). Error code: {err_code}. Error information: {err_msg}.