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Add Advanced Metrics

The DEM agent includes modules (or application agents) that allow you to collect system data from various components of your infrastructure, such as Apache, MySQL, Redis, Varnish, PostgreSQL, and more.

These application agents must be installed after installing the system agent. Refer to the dedicated page to install the agent

Apache​

  1. Install the package.

On Debian

apt-get install quanta-agent-apache

On CentOS

yum install quanta-agent-apache

  1. Verify that the status module (mod_status of Apache) is correctly configured on your server with the following command:

    curl http://127.0.0.1/server-status

  2. If not, you will need to enable the mod_status module in Apache

  3. If you want to modify the URL used by our module, you can edit the following file: /etc/quanta/modules.d/apache.yml.

  4. Restart the agent:

    systemctl restart quanta-agent

You should see metrics appear in DEM within a few minutes.

MySQL​

  1. Install the package:

On Debian

apt-get install quanta-agent-mysql

On CentOS

yum install quanta-agent-mysql

  1. We recommend creating a dedicated MySQL user for our probe, although it is not mandatory. For example, use the command below:

    echo "CREATE USER quanta@localhost IDENTIFIED BY 'supersecret'; " | mysql -u root -p

  2. Enter the username and password you chose in the following file: /etc/quanta/modules.d/mysqlstat.yml.

  3. Restart the agent:

    systemctl restart quanta-agent

You should see metrics appear in DEM within a few minutes.

PostgreSQL​

  1. Install the package:

On Debian

apt-get install quanta-agent-postgresql

On CentOS

yum install quanta-agent-postgresql

  1. We recommend creating a dedicated PostgreSQL user for our probe, although it is not mandatory. For example, use the command below:

    echo "CREATE ROLE quanta LOGIN password 'supersecret';" | sudo -u postgres psql postgres

  2. Enter the username and password you chose in the following file: /etc/quanta/modules.d/postgresql.yml.

  3. Restart the agent:

    systemctl restart quanta-agent

You should see metrics appear in DEM within a few minutes.

Nginx​

  1. Install the package:

On Debian

apt-get install quanta-agent-nginx

On CentOS

yum install quanta-agent-nginx

  1. Check that the status module is correctly configured on your server with the following command:

    curl http://127.0.0.1/status

  2. If not, you will need to set up the correct configuration as described here.

  3. If you want to modify the URL used by our module, you can edit the following file: /etc/quanta/modules.d/nginx.yml.

  4. Restart the agent:

    systemctl restart quanta-agent

You should see metrics appear in DEM within a few minutes.

Varnish​

  1. Install the package:

On Debian

apt-get install quanta-agent-varnish

On CentOS

yum install quanta-agent-varnish

  1. If you are using multiple Varnish instances, specify which instance you want to send data to Quanta by adding the following lines at the end of the following file /etc/quanta/modules.d/varnish.yml:

    varnish:
        instance: your_instance_name

  2. Restart the agent:

    systemctl restart quanta-agent

You should see metrics appear in DEM within a few minutes.

Redis​

  1. Install the package:

On Debian

apt-get install quanta-agent-redis

On CentOS

yum install quanta-agent-redis

  1. If you are not using the default port (6379), edit the following file: /etc/quanta/modules.d/redis.yml.

  2. If you are using Redis authentication, uncomment the line and enter the password in the /etc/quanta/modules.d/redis.yml file:

    auth: password

  3. If you are using multiple Redis instances, specify which instance you want to send data to Quanta by adding the following lines at the end of the /etc/quanta/modules.d/redis.yml file:

    instance: your_instance_name

  4. Restart the agent:

    systemctl restart quanta-agent

You should see metrics appear in DEM within a few minutes.

Memcached​

  1. Install the package:

On Debian

apt-get install quanta-agent-memcached

On CentOS

yum install quanta-agent-memcached

  1. If you are not using the default port (11211), edit the following file: /etc/quanta/modules.d/memcached.yml.

  2. Restart the agent:

    systemctl restart quanta-agent

You should see metrics appear in DEM within a few minutes.

The PHP profiler must be installed separately. Refer to the dedicated page, Install the PHP / Magento / OroCommerce Profiler