944d47167f
The tutorials combine the Galera and MariaDB monitor configuration as well as the server configuration sections that were duplicated for all tutorials. This should make the documentation easier to maintain.
61 lines
1.5 KiB
Markdown
61 lines
1.5 KiB
Markdown
# Configuring the Galera Monitor
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This document describes how to configure a Galera cluster monitor.
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## Configuring the Servers
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The first step is to define the servers that make up the cluster. These servers will be used by the services and are monitored by the monitor.
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```
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[dbserv1]
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type=server
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address=192.168.2.1
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port=3306
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protocol=MariaDBBackend
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[dbserv2]
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type=server
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address=192.168.2.2
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port=3306
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protocol=MariaDBBackend
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[dbserv3]
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type=server
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address=192.168.2.3
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port=3306
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protocol=MariaDBBackend
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```
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## Configuring the Monitor
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The next step is to define the monitor that monitors the servers.
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```
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[Galera-Monitor]
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type=monitor
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module=galeramon
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servers=dbserv1, dbserv2, dbserv3
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user=monitor_user
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password=my_password
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monitor_interval=2000
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```
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The mandatory parameters are the object type, the monitor module to use, the
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list of servers to monitor and the username and password to use when connecting
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to the servers. The `monitor_interval` parameter controls how many milliseconds
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the monitor waits between each monitoring loop.
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This monitor module will assign one node within the Galera Cluster as the
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current master and other nodes as slave. Only those nodes that are active
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members of the cluster are considered when making the choice of master node. The
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master node will be the node with the lowest value of `wsrep_local_index`.
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## Monitor User
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The monitor user does not require any special grants to monitor a Galera
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cluster. To create a user for the monitor, execute the following SQL.
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```
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CREATE USER 'monitor_user'@'%' IDENTIFIED BY 'my_password';
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```
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