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5.7 Configuring an Agent to Monitor a Remote MySQL Server

Typically, the Agent runs on the same machine as the MySQL servers that it is monitoring. To monitor MySQL servers running on remote hosts, you can install the Agent on a machine other than the one hosting the MySQL server.

The process for installing an Agent to monitor a MySQL server on a remote machine is identical to the process described in Chapter 5, Monitor Agent Installation. Follow the directions given there, being careful to either select "host-only" and add remote MySQL instances later, or specify the correct IP address or host name for MySQL Enterprise Service Manager and likewise for the MySQL server— since the Agent is not running on the same machine as the MySQL server, it cannot be the default (localhost).

Ensure that the Agent has the appropriate rights to log in to the MySQL server from a host other than localhost and that the port used by the MySQL server, typically 3306 must be open for remote access. For more information about the database credentials required by agents see, Section 5.2, “Creating MySQL User Accounts for the Monitor Agent”.

The Agent also needs to be able to log in to MySQL Enterprise Service Manager, typically using port 18443, so ensure that the appropriate port is open.

Remote Monitoring Limitations

  • Remote monitoring does not provide operating system level data, such as CPU, file, and network utilization information.

  • Monitoring multiple MySQL instances with a single agent potentially means having a single point of failure. This is especially true for remote monitoring, as it might lose a connection, which means a black period, whereas a local Agent continues monitoring and provides information upon reconnection.

  • For replication autodiscovery, do not use remote monitoring with replication slaves or masters. The Agent must be installed on the same machine as the server you are monitoring in order for discovery to work properly. For more information, see Chapter 26, Replication Dashboard.