&mamonsu;

<!ENTITY mamonsu SYSTEM "mamonsu.sgml">

<!-- doc/src/sgml/mamonsu.sgml -->

<refentry id="mamonsu">

<indexterm zone="mamonsu">

<primary>mamonsu</primary>

</indexterm>

<refmeta>

<refentrytitle><application>mamonsu</application></refentrytitle>

<manvolnum>1</manvolnum>

<refmiscinfo>Application</refmiscinfo>

</refmeta>

<refnamediv>

<refname>mamonsu</refname>

<refpurpose> a monitoring agent for collecting <productname>PostgreSQL</productname> and system metrics.</refpurpose>

</refnamediv>

<refsect1><title>Description</title>

<para>

<filename>mamonsu</filename> is an active monitoring agent for

<productname>&productname;</productname>. Based on <filename>zabbix</filename>,

<filename>mamonsu</filename> provides an extensible cross-platform

solution that can collect and visualize multiple <productname>PostgreSQL</productname> and

system metrics.

</para>

<para>

The <filename>mamonsu</filename> agent includes the following

components:

</para>

<itemizedlist>

<listitem>

<para>

A supervisor process that monitors all the running threads.

</para>

</listitem>

<listitem>

<para>

Plugins that specify which metrics to collect, and how to

visualize the collected data. To ensure a stable connection to

the monitored system, <filename>mamonsu</filename> plugins use a

<productname>PostgreSQL</productname> connection pooler.

</para>

</listitem>

</itemizedlist>

<para>

If required, you can add your own custom plugins to monitor specific

metrics critical for your system.

</para>

<refsect2 id="installation-and-setup">

<title>Installation and Setup</title>

<para>

To use <filename>mamonsu</filename>, you must have a <filename>zabbix</filename> account and a <filename>zabbix</filename> server set up, and install the

<filename>zabbix</filename> agent on the system you are going to monitor.</para>

<para>Pre-built <filename>mamonsu</filename> packages are

provided together with <productname>&productname;</productname>, but have a

separate installer. Once you have installed both <productname>&productname;</productname> and <filename>mamonsu</filename>, complete the following

steps to set up metrics collection:

</para>

<orderedlist>

<listitem>

<para>

If you are starting from scratch, configure your <productname>&productname;</productname> instance and intialize a new database. For details, see

<xref linkend="creating-cluster">.

</para>

</listitem>

<listitem>

<para>

Bootstrap <filename>mamonsu</filename>. You must specify the IP

address of the host you are going to monitor and the first database to connect to, as well as provide the username and password of the <productname>PostgreSQL</productname> user for <filename>mamonsu</filename> to connect as. You can omit the <literal>-W</literal> option if the password is not required.

</para>

<programlisting>

mamonsu bootstrap --host <replaceable>host_ip</replaceable> --dbname <replaceable>database_name</replaceable> --username <replaceable>username</replaceable> -W <replaceable>password</replaceable>

</programlisting>

<para>

As a result, <filename>mamonsu</filename> creates several tables

with the <filename>mamonsu</filename> prefix in the specified

database. Do not delete these tables as they are required for

<filename>mamonsu</filename> to work.

</para>

</listitem>

<listitem>

<para>

If you are going to use <filename>zabbix</filename> from the

command line, configure the following environment variables

for your <filename>zabbix</filename> server:

</para>

<itemizedlist>

<listitem>

<para>Set the <varname>ZABBIX_USER</varname> and <varname>ZABBIX_PASSWD</varname> variables to the login and password of your <filename>zabbix</filename> account, respectively.</para>

</listitem>

<listitem>

<para>Set the <varname>ZABBIX_URL</varname> to <literal>'http://zabbix/'</literal></para>

</listitem>

</itemizedlist>

<para>

If you configure these variables, you can omit the

following options in the subsequent commands:

</para>

<programlisting>

--url=http://zabbix/ --user=<replaceable>zabbix_login</replaceable> --password=<replaceable>zabbix_password</replaceable>

</programlisting>

</listitem>

<listitem>

<para>

Edit the <filename>agent.conf</filename> configuration file

pre-installed with <filename>mamonsu</filename>. By default, <filename>agent.conf</filename> is located in the <filename>mamonsu</filename> installation directory.

</para>

<itemizedlist>

<listitem>

<para>

Configure <filename>zabbix</filename>-related settings. You must

set <varname>address</varname>to the <filename>zabbix</filename> server address and specify the name of the <filename>zabbix</filename> host that will receive the collected metrics. You can find the hosts available for your account in the <filename>zabbix</filename> web interface under <emphasis role="srong"><guimenu>Configuration</guimenu></emphasis> > <emphasis role="srong"><guimenu>Hosts</guimenu></emphasis>.

</para>

<programlisting>

[zabbix]

; enabled by default

enabled = <literal>True</literal>

client = <replaceable>zabbix_host_name</replaceable>

address = <replaceable>zabbix_server_ip</replaceable>

</programlisting>

<note><para>If required, you can create a new <filename>zabbix</filename> host

from the command line:

</para>

<programlisting>

mamonsu zabbix host create \<replaceable>host_name</replaceable> \<replaceable>hostgroup_id</replaceable> \<replaceable>template_id</replaceable> \<replaceable>host_ip</replaceable> --url=http://zabbix/ --user=<replaceable>zabbix_login</replaceable> --password=<replaceable>zabbix_password</replaceable>

</programlisting></note></listitem>

<listitem>

<para>

Specify the <productname>PostgreSQL</productname> user and the database to connect to. In

the example below, we connect to a <literal>postgres</literal>

database as a <literal>postgres</literal> user. If the

password is not required, set the <literal>password</literal>

parameter to <literal>None</literal>.

<filename>mamonsu</filename> will start collecting metrics

starting from this database, and will try to connect to other

databases available in your system. By default,

<filename>mamonsu</filename> collects metrics data each 10ms.

You can change the <literal>query_timeout</literal> parameter

to modify this behavior. If you are using a custom port for

<productname>&productname;</productname>, make sure to change the <literal>port</literal>

parameter accordingly.

</para>

<programlisting>

[postgres]

; enabled by default

enabled = True

user = postgres

database = postgres

; empty password

password = None

port = 5432

query_timeout = 10

</programlisting>

</listitem>

<listitem>

<para>

By default, <filename>mamonsu</filename> will collect both

<productname>PostgreSQL</productname> and system metrics. If required, you can disable

metrics collection of either type by setting the

<literal>enabled</literal> parameter to

<literal>False</literal> in the corresponding section of the

<filename>agent.conf</filename> file.

</para>

<programlisting>

[system]

; enabled by default

enabled = True

</programlisting>

</listitem></itemizedlist>

</listitem>

<listitem>

<para>

Export a template for <filename>zabbix</filename>:

</para>

<programlisting>

mamonsu export template template.xml

</programlisting>

<para>

<filename>mamonsu</filename> generates the

<literal>template.xml</literal> file in your current

directory.

</para>

</listitem>

<listitem>

<para>

Import the <literal>template.xml</literal> into

<filename>zabbix</filename>:

</para>

<programlisting>

mamonsu zabbix template export template.xml --url=http://zabbix/ --user=<replaceable>zabbix_login</replaceable> --password=<replaceable>zabbix_password</replaceable>

</programlisting>

<para>

To upload the template through the <filename>zabbix</filename> web interface, you can go to <emphasis role="strong">Templates</emphasis> > <emphasis role="strong">Import</emphasis> in your <filename>zabbix</filename> account.</para>

</listitem>

<listitem>

<para>

Add the template to your monitoring host. In the web interface, select your host, go to <emphasis role="strong">Templates</emphasis>, click <emphasis role="strong">Add</emphasis>, select the <literal>PostgresPro-Linux</literal> template, and click <emphasis role="strong">Update</emphasis>.</para>

</listitem>

</orderedlist>

<para>

When the setup is complete, start <filename>mamonsu</filename>:

</para>

<programlisting>

service mamonsu start

</programlisting>

<para>

<filename>mamonsu</filename> picks up all the parameters from the

configuration file and starts monitoring your system.

</para>

</refsect2>

<refsect2 id="collecting-metrics-data">

<title>Collecting Metrics Data</title>

<para>

To view the list of available metrics, run the following command:

</para>

<programlisting>

mamonsu agent metric-list

</programlisting>

<para>

To monitor a specific metric, run:

</para>

<programlisting>

mamonsu agent metric-get <replaceable>key</replaceable>

</programlisting>

<para>

where <replaceable>key</replaceable> is the name of the metric. You can view graphs for the

collected metrics in the <filename>zabbix</filename> web interface under the <emphasis role="strong"><guimenu>Graphs</guimenu></emphasis> menu.

</para>

<para>

To create a report about the used hardware and <productname>PostgreSQL</productname>, run:

</para>

<programlisting>

mamonsu report

</programlisting>

<para>

Based on the hardware information, <filename>mamonsu</filename>

enables you to make a generic optimization for your system and the

<productname>PostgreSQL</productname> instance:

</para>

<programlisting>

mamonsu tune

</programlisting>

</refsect2>

<refsect2 id="mamonsu-adding-custom-plugins">

<title>Adding Custom Plugins</title>

<para>To add your own custom plugin to <filename>mamonsu</filename>, follow these steps:</para>

<orderedlist>

<listitem><para>Make sure a plugin directory is defined in your configuration file, and put your plugin files into this directory.</para>

<programlisting>

[plugins]

directory = /etc/mamonsu/plugins

</programlisting>

</listitem>

<listitem><para>Re-export the <filename>zabbix</filename> template:</para>

<programlisting>

mamonsu -c agent.conf -e template.xml

</programlisting>

</listitem>

<listitem>

<para>

Upload the new <filename>template.xml</filename> to the <filename>zabbix</filename> server.

</para>

</listitem>

</orderedlist>

</refsect2>

</refsect1>

</refentry>