Elasticsearch Monitoring

Introduction

An Elasticsearch monitor detects your database status, and automatically triggers traffic switching when the database is abnormal.

Creating an Elasticsearch Monitor

1. Log in to the MAS console. On the Multi-Active Instances page, click an instance whose namespace type is Intra-city multi-active.
2. Click the Monitor List tab, and click Create Monitor.
3. Configure the basic information, then click Next: Data Centers.
   Figure 1 Basic information configurations
   

   Table 2 Basic information parameters

   Parameter	Description
   Monitor	Select Elasticsearch Monitoring.
   Application	Select the application.
   Monitor Name	Customize the monitor name.
   Exception Notification	By default, this option is disabled. If it is enabled, monitor and database exceptions will be sent to you in a timely manner with the Huawei Cloud SMN service. Configure a secret key first. Cloud Eye is enabled by default. Ensure that the alarm rules for MAS have been created on the Cloud Eye console. For details, see Creating an Alarm Rule to Monitor an Event.
   Subject	If Exception Notification is enabled, select a subject from the drop-down list or click Add to create a new one.
   Monitoring	The default value is Yes. If No, database exceptions will not be monitored.
   Automatic Switchover	The default value is Yes. If No, automatic switchover of the databases will not be triggered.
   Routing Algorithm	Option: Single read/write

4. Configure the data centers, then click Next: Advanced.
   Figure 2 Data center configurations
   

   Table 3 Data center parameters

   Parameter	Description
   Cloud	The environment where the monitored Elasticsearch database is deployed
   Region	The region where the monitored Elasticsearch database is deployed
   azs	Set this parameter for data centers 1 and 2 based on the AZs where the Elasticsearch databases are deployed.
   Connection Address	The IP address and port number for accessing the Elasticsearch database
   Add Connection Address	You can add more connection addresses.
   Username	Enter the username for logging in to the Elasticsearch database. CAUTION: To prevent risks, it is recommended to use a username that is different from your service username and has been granted only the read permissions.
   Protocol	Options: HTTPS and HTTP
   Password	Enter the password of the monitored Elasticsearch database.
   Confirm Password	Enter the password again.

   

   MAS supports Elasticsearch 7.10.2 and later. Ensure that the password is correct, otherwise, the data source will be locked for 15 minutes.

5. Configure the advanced settings, then click Next: Confirm.
   Figure 3 Advanced configurations
   

   Table 4 Advanced settings

   Parameter	Description
   Retry Interval (ms)	The interval of reconnection attempts, in milliseconds. Default value (recommended): 3000 Value range: 1 to 300,000
   Monitoring Timeout (ms)	The timeout duration before a monitor becomes abnormal, in milliseconds. Default value (recommended): 40,000; Value range: 1 to 600,000 NOTE: Ensure that the time you specify here is longer than the time required for data center 1 to synchronize data to data center 2. Otherwise, the data in data center 2 may be incomplete.

6. Confirm settings and click Create.
   

   If the created monitor is not normal, that is, its indicator is not green, its configurations or databases may be abnormal. In this case, rectify the fault.