mamonsu is an active agent for collecting PostgreSQL instance and operating system metrics that can interact with Zabbix.
Development version, available on GitHub, released under BSD 3-clause.
Python 3.3+
Supported platforms:
Supported Zabbix server versions: 4.0.44 - 6.4.13 Supported PostgreSQL versions: 12 - 16
Table of Contents
Based by Zabbix, mamonsu provides an extensible cross-platform solution that can collect and visualize multiple PostgreSQL/PostgresPro and system metrics. mamonsu has about 90 PostgreSQL metrics and about 40 system metrics. The agent collects metrics such as database availability, number of connections, locks, WAL problems, checkpoints, background writer activity, memory problems and many others. Unlike many monitoring agents configured to collect PostgreSQL metrics, mamonsu uses a single database connection, which minimizes performance impact on the monitored system. mamonsu also contains a number of tools for interacting with the Zabbix API, obtaining system information and information about collected metrics.
mamonsu is written entirely in Python 3 and has a plugin architecture. It is an active agent, which means that it sends the data to the Zabbix server once it is collected. Pre-configured to monitor multiple PostgreSQL and system metrics out of the box, mamonsu can be extended with your own custom plugins to track other metrics crucial for your system.
mamonsu can be installed on the same server where the DBMS we are going to monitor is located or on remote server, but:
NOTE: While mamonsu can collect PostgreSQL metrics from a remote server, system metrics are only collected locally. If you choose to collect PostgreSQL metrics remotely, make sure to disable collection of system metrics to avoid confusion, as they will be displayed under the same host in Zabbix.
A template generated by mamonsu must be bound to the Zabbix host to receive and display metrics.
mamonsu can be easily customized. You can configure such parameters as the data collection interval for each plugin (by default it is 60 seconds), the size of the message queue for the Zabbix server, optionally disable/enable various components.
Only Python3.3+ and any text editor.
mamonsu by default has 3 plugin groups and all of them are active:
mamonsu not only collects metrics, but provides triggers and graphs.
See details in chapter called "Metrics".
Since mamonsu 3.0 template contains screens:
Overview
Contains graphs representing general important metrics: PostgreSQL connections, shared buffers size and usage, autovacuum, tuples, checkpoint, background worker, system CPU and memory.
PostgreSQL Instance
Contains information about Instance availability
PostgreSQL Locks
PostgreSQL Transactions
PostgreSQL WAL
Contains information about WAL size, archiving
System
Contains information about state of the system
mamonsu Dashboard (only for Zabbix 6.0+)
Pretty dashboard containing all necessary PostgreSQL and system information.
mamonsu provides the command-line interface for updating some Zabbix server settings, as well as getting an overview of the monitored system configuration and tuning PostgreSQL and system settings on the fly. Also it provides tool to generate a detailed report on the hardware, operating system, memory usage and other parameters of the monitored system. List of mamonsu commands and options:
mamonsu agent [agent_action] [-c | --config]
mamonsu bootstrap [-M mamonsu_user] [-x | --create-extensions] [-c | --config] [connection_options]
mamonsu export {template | config} filename [export_options]
mamonsu report [report_options] [connection_options]
mamonsu tune [tuning_options] [connection_options]
mamonsu upload [upload_options]
mamonsu zabbix {template | host | hostgroup} server_action
mamonsu zabbix item {error | lastvalue | lastclock} host_id
mamonsu zabbix dashboard upload [template_name]
mamonsu zabbix version
mamonsu --version
mamonsu --help
For all details, see the chapter called “Tools".
Build deb:
$ apt-get install make dpkg-dev debhelper python3-dev python3-setuptools
$ git clone ... && cd mamonsu && make deb && dpkg -i mamonsu*.deb
Build rpm:
$ yum install make rpm-build python3-devel python3-setuptools
$ git clone ... && cd mamonsu && make rpm && rpm -i mamonsu*.rpm
Build win32 exe:
$ git clone ... && cd mamonsu && py setup_win32.py py2exe
$ copy dist\mamonsu.exe c:\mamonsu
$ copy dist\service_win32.exe c:\mamonsu
$ c:\mamonsu\mamonsu.exe -w c:\mamonsu\agent.conf
$ c:\mamonsu\service_win32.exe -install
$ net start mamonsu
or
$ pyinstaller --onefile mamonsu_win32.spec
$ pyinstaller --onefile service_win32.spec
Build NSIS installer:
$ git clone ... && cd mamonsu && py setup_win32.py py2exe
$ makensis packaging\win\mamonsu.nsis
To use mamonsu, you must create a Zabbix account and set up a Zabbix server as explained in Zabbix documentation. Naturally, you must also have a PostgreSQL instance up and running if you are going to monitor PostgreSQL metrics.
Pre-built mamonsu packages are provided in official Postgres Pro repository: repo/mamonsu
Install from repository using script:
$ wget https://repo.postgrespro.ru/mamonsu/keys/pgpro-repo-add.sh
$ sudo chmod 700 ./pgpro-repo-add.sh
$ sudo ./pgpro-repo-add.sh
Install package
$ yum install mamonsu
$ zypper install mamonsu
$ apt-get update
$ apt-get install mamonsu
For Windows:
Pre-Build packages for Windows: Windows installer
Build and install from source code:
git clone ... && cd mamonsu && python3 setup.py build && python3 setup.py install
Optionally, bootstrap mamonsu
If you omit this step, metrics can only be collected on behalf of a superuser, which is not recommended.
CREATE USER mamonsu_user WITH PASSWORD 'mamonsu_password';
CREATE DATABASE mamonsu_database OWNER mamonsu_user;
mamonsu bootstrap [-M mamonsu_user] [-x | --create-extensions] [-c | --config] [connection_options]
For details of usage, see “Tools".
As the result of this operation, monitoring functions are created in the mamonsu_database in mamonsu schema, and the right to execute them is granted to the mamonsu_user. Thus, a superuser connection is no longer required. mamonsu also creates several tables in the specified database. Do not delete these tables as they are required for mamonsu to work.
Configure mamonsu
Edit the agent.conf configuration file.
Configure Zabbix-related settings. The address field must point to the running Zabbix server, while the client field must provide the name of the Zabbix host. You can find the list of hosts available for your account in the Zabbix web interface under Configuration > Hosts.
[zabbix]
; enabled by default
enabled = True
client = zabbix_host_name
address = zabbix_server
By default, mamonsu will collect both PostgreSQL and system metrics. If required, you can disable metrics collection of either type by setting the enabled parameter to False in the [postgres] or [system] section of the agent.conf file, respectively.
[system]
; enabled by default
enabled = True
If you are going to collect PostgreSQL metrics, specify connection parameters for the PostgreSQL server you are going to monitor. In the user, password and database fields, you must specify the mamonsu_user, mamonsu_password and the mamonsu_database used for bootstrap
, respectively. If you skipped the bootstrap
, specify a superuser credentials and the database to connect to.
NOTE: mamonsu stores passwords as plain text in its configuration file, so control access to this file. By default configuration file agent.conf should have read/write permissions for mamonsu user only.
[postgres] ; enabled by default enabled = True user = mamonsu_user database = mamonsu_database password = mamonsu_password port = 5432
These are the main mamonsu settings to get started. You can also fine-tune other mamonsu settings as explained in the chapter called "Configuration file".
Template creation and upload
Generate a template that defines how to visualize collected metrics on the Zabbix server:
mamonsu export template template.xml
mamonsu generates the template.xml file in your current directory. By default, the name of the template that will be displayed in the Zabbix account is mamonsu PostgreSQL OS, where OS is the name of your operating system. To get a template with a different display name, you can run the above command with the --template-name option.
Optionally, specify your Zabbix account settings in the following environment variables on your monitoring system:
If you skip this step, you will have to add the following options to all mamonsu zabbix
commands that you run:
--url=http://zabbix/ --user=zabbix_login --password=zabbix_password
Upload the template.xml to the Zabbix server
mamonsu zabbix template export template.xml
Alternatively, you can upload the template through the Zabbix web interface: log in to your Zabbix account and select Templates > Import.
Link the generated template to the host to be monitored
In the Zabbix web interface, select your host, go to Templates > Add, select your template, and click Update. If you would like to link a template with a new Zabbix host, you can do it from the command line using mamonsu zabbix
commands. See the section called "Zabbix cli" for details.
On UNIX-like systems:
$ service mamonsu start
or by hand:
$ mamonsu -d -a /etc/mamonsu/plugins -c /etc/mamonsu/agent.conf -p /var/run/mamonsu.pid
In order to correctly update the template after minor update and save all the data, it is necessary to generate the same template and application names. You can find your current template name in the Zabbix web interface under Configuration > Templates and application name in Configuration > Templates > Applications.
After getting current template and application names, you should generate template like this:
mamonsu export template template.xml --template-name="CURRENT_TEMPLATE_NAME" --application="CURRENT_APPLICATION_NAME"
Next, upload new template to the Zabbix server. You can do it via command line interface:
mamonsu zabbix template export template.xml
Or through the Zabbix web interface:
NOTE: While uploading through the Zabbix web interface, you must set Delete missing parameter to true for Value mappings, Template dashboards, Items, Discovery rules, Triggers and Graphs.
Zabbix host setup only with mamonsu zabbix
cli
mamonsu export template template.xml
export ZABBIX_USER=Admin
export ZABBIX_PASSWD=zabbix
export ZABBIX_URL=http://zabbix/
mamonsu zabbix template export template.xml
mamonsu zabbix host create "pg-host" $(mamonsu zabbix hostgroup id "Linux Servers") $(mamonsu zabbix template id "mamonsu PostgreSQL Linux") "10.10.0.4"
This snippet shows how to create Zabbix host called pg-host with mamonsu template in hostgroup Linux Servers with address 10.10.0.4.
mamonsu setup with remote PostgreSQL
mamonsu export template template.xml; mamonsu zabbix template export template.xml
mamonsu zabbix host create "remote-pg-1" $(mamonsu zabbix hostgroup id "Linux servers") $(mamonsu zabbix template id "mamonsu PostgreSQL Linux") "45.45.200.5"
Setup agent.conf
[postgres]
enabled = True
user = mamonsu
password = mamonsu
database = postgres
host = 45.45.200.5
port = 5432
application_name = mamonsu
query_timeout = 10
[zabbix]
enabled = True
client = remote-pg-1
address = 127.0.0.1
port = 10051
re_send = False
mamonsu setup with remote PostgreSQL via SSH tunnel
mamonsu export template template.xml; mamonsu zabbix template export template.xml
mamonsu zabbix host create "remote-pg-1" $(mamonsu zabbix hostgroup id "Linux servers") $(mamonsu zabbix template id "mamonsu PostgreSQL Linux") "45.45.200.5"
ssh -L 63333:localhost:5432 user@45.45.200.5
Setup agent.conf
[postgres]
enabled = True
user = mamonsu
password = mamonsu
database = postgres
host = localhost
port = 63333
application_name = mamonsu
query_timeout = 10
[zabbix]
enabled = True
client = remote-pg-1
address = 127.0.0.1
port = 10051
re_send = False
Major update
If you want to upgrade mamonsu to a version that is not compatible with the previous one, what you must do to continue using the application depends on whether you need to retain the metrics data collected.
If you do not need to retain the collected data, just unlink old template and link a new one.
If you need to retain the collected data, do the following:
The difficulty is that Zabbix cannot massively rename hosts.
We offer the following recommendations:
If you have access to the Zabbix database:
Mass rename hosts via SQL:
zabbix=# SELECT host, name FROM hosts
zabbix-# WHERE host LIKE '%local-pg%';
-[ RECORD 1 ]----
host | local-pg-2
name | local-pg-2
-[ RECORD 2 ]----
host | local-pg-3
name | local-pg-3
zabbix=# UPDATE hosts
zabbix=# SET host = host || ' OLD-mamonsu',
zabbix=# name = name || ' OLD-mamonsu'
zabbix=# WHERE host LIKE '%local-pg%';
UPDATE 2
zabbix=# SELECT host, name FROM hosts
zabbix=# WHERE host LIKE '%local-pg%';
-[ RECORD 1 ]----------------
host | local-pg-2 OLD-mamonsu
name | local-pg-2 OLD-mamonsu
-[ RECORD 2 ]----------------
host | local-pg-3 OLD-mamonsu
name | local-pg-3 OLD-mamonsu
Using Zabbix API:
API query:
curl -H "Content-type: application/json-rpc" -X POST http://zabbix/api_jsonrpc.php -d'
{
"jsonrpc": "2.0",
"method": "host.update",
"params": {
"hostid": "HOST_ID",
"host": "local-pg-3 OLD-mamonsu",
"name": "local-pg-3 OLD-mamonsu"
},
"auth": "AUTH_TOKEN",
"id": 1
}'
Script usage example:
./rename_zabbix_hosts.sh --url=http://localzabbix/ --pattern="local-pg" --suffix="OLD-mamonsu"