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Added Galera monitor documentation.

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Markus Makela
2015-05-11 06:45:37 +03:00
parent 86a8d5bf3b
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monitors/MySQL-Monitor.md
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## Overview
The MySQL monitor is a monitoring module for MaxScale that monitors a Master-Slave replication cluster. It assigns master and slave roles inside MaxScale according to the acutal replication tree in the cluster.
The MySQL Monitor is a monitoring module for MaxScale that monitors a Master-Slave replication cluster. It assigns master and slave roles inside MaxScale according to the acutal replication tree in the cluster.
## Configuration
A minimal configuration of the MySQL monitor requires a set of servers for monitoring and a username and a password to connect to these servers. The user requires the REPLICATION CLIENT privilege to successfully monitor the state of the servers.
A minimal configuration for a monitor requires a set of servers for monitoring and a username and a password to connect to these servers. The user requires the REPLICATION CLIENT privilege to successfully monitor the state of the servers.
```
[MySQL Monitor]
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```
## Optional parameters
## Optional parameters for all monitors
Here are optional parameters for the MySQL monitor that change the way it behaves.
Here are optional parameters that are common for all the monitors.
### `monitor_interval`
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backend_read_timeout=2
```
## MySQL Monitor optional parameters
These are optional parameters specific to the MySQL Monitor.
### `detect_replication_lag`
Detect replication lag between the master and the slaves. This allows the routers to route read queries to only slaves that are up to date.
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```
<name of the script> --event=<event type> --initiator=<server whose state changed> --nodelist=<list of all servers>
```
Here is a table of all possible event names and their descriptions.
Here is a table of all possible event types and their descriptions.
Event Name|Description
----------|----------