Add a Poller to configuration · Centreon documentation

Configure a new Poller

As of Centreon version 18.10, a new wizard has been added for defining a new Poller on the Centreon platform.

Go to the Configuration > Pollers menu and click on Add server with wizard to configure a new Poller.

Select Add a Centreon Poller and click on Next:

Type in the name, the IP address of the Poller and IP address of the Central Server. Click on Next:

The IP address of the Poller is the IP address or the FQDN used to access this poller from the Central server.

The IP address of the Central server is the IP address or the FQDN used to access the Central server from the Poller.

If you want to link the poller to the Centreon Server, click on Apply:

Otherwise, if you want to link the poller to an existing Centreon Remote Server, select one from the list. Then click Apply.

If you want to change the direction of the flow between the Centreon Server (or the Remote Server and the Poller, check the Advanced: reverse Centreon Broker communication flow checkbox. In this case, it will be necessary to export the configuration of the collector as well as the server to which it will be attached.

In a few seconds the wizard will configure your new poller.

Enable communication

The communication between a Central and a Poller is ensured by Gorgone and can be done using ZMQ (with a Gorgone running on the Poller, recommended) or using SSH protocol.

Using ZMQ (Recommended)

Using SSH

Select communication type

Edit the newly created Poller configuration, and select ZMQ as Gorgone connection protocol. Define the suitable port (port 5556 is recommended).

Click on Save.

Display Gorgone configuration

From the Pollers listing, click on the Display Gorgone configuration action icon on the line corresponding to your Poller

A pop-in will show the configuration to copy into the Poller terminal. Click on Copy to clipboard.

Note that a SSH port is still required (SSH Legacy port) for the Service Discovery extension.

This extension will soon use Gorgone communication protocol.

Paste the content of the clipboard directly into the Poller terminal as it contains the following content, and will fill the right file:

cat <<EOF > /etc/centreon-gorgone/config.d/40-gorgoned.yaml
name:  gorgoned-My Poller
description: Configuration for poller My Poller
gorgone:
  gorgonecore:
    id: 2
    external_com_type: tcp
    external_com_path: "*:5556"
    authorized_clients:
      - key: Np1wWwpbFD2I0MdeHWRlFx51FmlYkDRZy9JTFxkrDPI
    privkey: "/var/lib/centreon-gorgone/.keys/rsakey.priv.pem"
    pubkey: "/var/lib/centreon-gorgone/.keys/rsakey.pub.pem"
  modules:
    - name: action
      package: gorgone::modules::core::action::hooks
      enable: true

    - name: engine
      package: gorgone::modules::centreon::engine::hooks
      enable: true
      command_file: "/var/lib/centreon-engine/rw/centengine.cmd"

EOF

Hit the Enter key for the command to be applied.

You can copy the configuration in a custom file by copying the content from the pop-in.

Start Gorgone daemon

From the Poller, run the following command to start Gorgone service:

systemctl start gorgoned

Make sure it is started by running the following command:

systemctl status gorgoned

It should result as follow:

● gorgoned.service - Centreon Gorgone
   Loaded: loaded (/etc/systemd/system/gorgoned.service; disabled; vendor preset: disabled)
   Active: active (running) since Mon 2020-03-24 19:45:00 CET; 20h ago
 Main PID: 28583 (perl)
   CGroup: /system.slice/gorgoned.service
           ├─28583 /usr/bin/perl /usr/bin/gorgoned --config=/etc/centreon-gorgone/config.yaml --logfile=/var/log/centreon-gorgone/gorgoned.log --severity=info
           ├─28596 gorgone-dbcleaner
           ├─28597 gorgone-engine
           └─28598 gorgone-action

Mar 24 19:45:00 localhost.localdomain systemd[1]: Started Centreon Gorgone.

Finally, enable the automatic startup of the service with the command:

systemctl enable gorgoned

Select communication type

Edit the newly created Poller configuration, and select SSH as Gorgone connection protocol. Define the suitable port.

Click on Save.

Exchange SSH keys

If you do not have any private SSH keys on the Central server for the centreon-gorgone user, create one with the following commands:

su - centreon-gorgone
ssh-keygen -t rsa

Hit enter when it prompts for a file to save the key to use the default location, or, create one in a specified directory. Leave the passphrase blank. You will receive a key fingerprint and a randomart image.

Generate a password for the centreon user on the new Poller:

passwd centreon

Then, copy this key on to the new Poller with the following commands:

su - centreon-gorgone
ssh-copy-id -i .ssh/id_rsa.pub centreon@<IP_POLLER>

To force the Central's Gorgone daemon to connect to the Poller, restart it with the following command from the Central server:

systemctl restart gorgoned

Export the configuration

From the Pollers listing, select the Poller and click on Export configuration.

Then check the four first boxes, select the Restart method and click on Export:

The Poller's engine will then start and connect to the Central Broker.

Getting started

Go to the Getting Started chapter to configure your first monitoring.