Set the Exporter User

The exporter is typically owned by the database root user. To start the exporter as a database user other than root, run the following SQL statements and specify the desired database user for <exporter-user> and this user's password for <secure-password>.

Note: The database user that starts the exporter process can differ from the database user that starts the monitoring process.

CREATE USER '<exporter-user>' IDENTIFIED BY '<secure-password>';
GRANT CLUSTER, SHOW METADATA, SELECT, PROCESS ON *.* to '<exporter-user>'@'%';

Start the Exporter Process

Perform the following steps on the Source cluster's Master Aggregator.

Note that the exporter process is restarted when the exporter_port variable is set to any non-zero value, including the current value. The exporter_port variable can be set by running sdb-admin configure-monitoring --exporter-port <port>.

Run either of the following to start the exporter. This command starts the exporter using the specified database user and default port (9104). The exporter username and password are used to access the Source cluster. Refer to sdb-admin configure-monitoring for more information.

Note: If starting the exporter as a database user other than root, substitute the database user for root in the --exporter-user option and this user’s password for <secure-password> in the --exporter-password option.

sdb-admin configure-monitoring \
--exporter-user root \
--exporter-password <secure-password>

sdb-admin configure-monitoring --stop-exporter

Set the Monitoring User

Monitoring is typically owned by the database root user. To start monitoring as a database user other than root, run the following SQL statements and specify the desired database user for <monitoring-user> and this user's password for <secure-password>.

Note: The database user that starts the monitoring process can differ from the database user that starts the exporter process.

CREATE USER '<monitoring-user>' IDENTIFIED BY '<secure-password>';
GRANT SELECT, CREATE, INSERT, UPDATE, DELETE, EXECUTE, INDEX, ALTER, DROP, CREATE DATABASE, LOCK TABLES, CREATE VIEW, SHOW VIEW, CREATE ROUTINE ON metrics.* to '<monitoring-user>'@'%';
GRANT CREATE PIPELINE, DROP PIPELINE, ALTER PIPELINE, START PIPELINE, SHOW PIPELINE ON metrics.* to '<monitoring-user>'@'%';

Start the Monitoring Process

The monitoring process configures the metrics database and starts monitoring the cluster.

The following command creates a database named metrics with a 10-day retention period for the data, and also creates the associated metrics and blobs pipelines. These pipelines are responsible for extracting data from the exporter and storing it in the metrics database.

The exporter-host value must be the Master Aggregator host in the Source cluster. The user and password are the credentials for the Metrics cluster. The variable retention-period defines the number of days that data is retained before being deleted. Refer to sdb-admin start-monitoring for more information.

Please note the following:

• The database that is created to store monitoring data is named metrics by default. You may change the database name by updating the value of the --database-name option.

• The IP address provided in the exporter-host argument must be resolvable by all hosts in the cluster. If the cluster you are monitoring has hosts that contain leaf nodes (as is common in a multi-host vs. single-host deployment), do not use localhost. Instead, provide the explicit IP address or hostname that the other hosts in the cluster can resolve.

• This command must be run on the Metrics cluster.

• By default, data from a Source cluster is collected every minute. This interval can be changed via the --batch-interval option in the sdb-admin start-monitoring command.

Note: If starting the monitoring process as a database user other than root, substitute the database user for root in the --user option and this user’s password for <secure-password> in the --password option.

sdb-admin start-monitoring \
  --database-name metrics \
  --exporter-host <exporter-hostname-or-IP-address> \
  --user root \
  --password <secure-password> \
  --retention-period 10

sdb-admin stop-monitoring \
--exporter-host <exporter-hostname-or-IP-address> \
--user root \
--password <secure-password>