Cacti

Agent Check

Overview

Get metrics from cacti service in real time to:

• Visualize and monitor cacti states
• Be notified about cacti failovers and events.

Setup

Find below instructions to install and configure the check when running the Agent on a host. See the Autodiscovery Integration Templates documentation to learn how to apply those instructions to a containerized environment.

Installation

The Cacti check is included in the Datadog Agent package, to start gathering metrics you first need to: - Install librrd headers and libraries - Install python bindings to rrdtool

librrd headers and librairies

On Debian/Ubuntu

sudo apt-get install librrd-dev

On RHEL/CentOS

sudo yum install rrdtool-devel

Python bindinges

Now add the rrdtool Python package to the Agent with the following command.

sudo -u dd-agent /opt/datadog-agent/embedded/bin/pip install rrdtool

Configuration

Create a datadog user with read-only rights to the Cacti database

sudo mysql -e "create user 'datadog'@'localhost' identified by '<password>';"
sudo mysql -e "grant select on cacti.* to 'datadog'@'localhost';"

Check user and rights

mysql -u datadog --password=<password> -e "show status" | \
grep Uptime && echo -e "\033[0;32mMySQL user - OK\033[0m" || \
echo -e "\033[0;31mCannot connect to MySQL\033[0m"

mysql -u datadog --password=<password> -D cacti -e "select * from data_template_data limit 1" && \
echo -e "\033[0;32mMySQL grant - OK\033[0m" || \
echo -e "\033[0;31mMissing SELECT grant\033[0m"

Configure the Agent to connect to MySQL, edit your cacti.d/conf.yaml file. See the sample cacti.d/conf.yaml for all available configuration options:

init_config:

instances:
    -   mysql_host: localhost
        mysql_user: datadog
        mysql_password: hx3beOpMFcvxn9gXcs0MU3jX
        rrd_path: /path/to/cacti/rra
        #field_names:
        #    - ifName
        #    - dskDevice
        #    - ifIndex
        #rrd_whitelist: /path/to/rrd_whitelist.txt

Give the datadog-agent user access to the RRD files

sudo gpasswd -a dd-agent www-data
sudo chmod -R g+rx /var/lib/cacti/rra/
sudo su - datadog-agent -c 'if [ -r /var/lib/cacti/rra/ ];
then echo -e "\033[0;31mdatadog-agent can read the RRD files\033[0m";
else echo -e "\033[0;31mdatadog-agent can not read the RRD files\033[0m";
fi'

Validation

Run the Agent’s status subcommand and look for cacti under the Checks section.

Data Collected

Metrics

Events

The Cacti check does not include any events.

Service Checks

The Cacti check does not include any service checks.

Troubleshooting

Known issues

The Python library used by this integration leaks memory under certain circumstances. If you experience this, one workaround is to install the python-rrdtool package instead of rrdtool. This older package is not maintained and is not officially supported by this integration but it has helped others resolve the memory issues.

A Github issue has been opened to track this memory leak.

Need help? Contact Datadog support.

Mistake in the docs? Feel free to contribute!