Configuring Notifications for MRS Cluster Alarms and Events

Step 1: Creating an SMN Topic and Adding a Subscription

A topic is used to publish messages and subscribe to notifications. It serves as a message sending channel, where publishers and subscribers can interact with each other.

1. Log in to the management console.
2. Click Service List. Under Management & Governance, click Simple Message Notification.
3. In the navigation pane, choose Topic Management > Topics.
4. Click Create Topic.

   Table 1 Parameters for creating an SMN topic

   Parameter	Description	Example Value
   Topic Name	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.	mrs-job
   Display name	Message sender name, which can contain up to 192 bytes. After you specify a display name, the sender in email messages will be presented as Display name<username@example.com>. Otherwise, the sender will be username@example.com.	mrs-job-failed
   Enterprise Project	Name of an enterprise project. An enterprise project allows you to group cloud resources under specific projects, making it easier to manage cloud resources and users. The default name is default. This parameter is for enterprise users.	default

5. Click OK.

   After a topic is created, the system generates a topic URN, which uniquely identifies the topic and cannot be changed.

   The created topic is displayed in the topic list. You can click the topic name to view its details.

6. Locate the topic to which you want to add a subscription, click More in the Operation column, and select Add Subscription.
   Figure 2 Adding a subscription to a topic
   

   Endpoint indicates the address of the subscription endpoint. You can add multiple SMS and email endpoints at a time, one in each line. You can enter a maximum of 10 endpoints.

   Table 2 Parameters for adding a subscription

   Parameter	Description	Example Value
   Protocol	Protocol supported by the subscription endpoints. For example, you can receive messages through SMS messages or emails.	Email
   Method	The following two options are available: Add subscriptions Import subscriptions: Select subscribers whose subscription has been confirmed and import the subscription data.	Add subscriptions
   Endpoint	Subscription endpoint. You can enter up to 10 SMS, email, HTTP, or HTTPS endpoints, one in each line.	username@example.com

7. Click OK. The new subscription is displayed in the subscription list.

   Once you have added a subscription, SMN will send a confirmation message to the subscription endpoint, which includes a link for confirming the subscription. The subscription confirmation link is valid for 48 hours. Make sure to confirm your subscription on your mobile phone, mailbox, or other endpoints within this time frame.

   The subscription endpoint can receive messages only after the subscription status changes to Confirmed.

   Figure 3 Viewing the subscription status
   

Configuring Notification Rules for MRS Clusters

1. Log in to the MRS console.
2. Choose Active Clusters, select a running cluster, and click its name to go to its details page.
3. Click Alarms.
4. Choose Notification Rules > Add Notification Rule.
   Figure 4 Creating a message subscription rule
   

5. Set the notification rule parameters.

   Table 3 Parameters of a notification rule

   Parameter	Example Value	Description
   Rule Name	mrs_alarm	User-defined notification rule name. Only digits, letters, hyphens (-), and underscores (_) are allowed.
   Message Notification	Enable	If you enable this function, the system sends notifications to subscribers based on the notification rule. If you disable this function, the rule does not take effect, that is, notifications are not sent to subscribers.
   Topic Name	mrs_topic	Select an existing topic or click Create Topic to create a topic.
   Notification Type	Alarm	Select the type of the notification to be subscribed to. Alarm Event
   Subscription Items	Major	Select the items to be subscribed to. You can select all or some items as required. For example, choose Major > Manager and select Node Fault.

6. Click OK. After the message notification is configured, the related endpoint can receive detailed notification messages when alarms or events in the subscription rule are generated in the MRS cluster.

   After a message subscription rule is applied, you may receive some historical alarms.

Helpful Links

• SMN can push cloud service notifications based on your requirements. For more information about SMN, see Simple Message Notification.
• Alarms generated for MRS clusters need to be manually cleared. For details, see MRS Cluster Alarm Handling Reference.