Advanced configuration

This chapter describes advanced procedures for configuring your Centreon MAP system.

Monitoring your Centreon MAP (Legacy) server after installation

Centreon provides a plugin pack and a plugin to monitor your Centreon MAP (Legacy) server.

Install the Packs

On the Central server, install the required Packs with the following commands:

yum install centreon-pack-operatingsystems-linux-snmp centreon-pack-applications-jvm-actuator

From the Plugin Packs Manager, install the Packs.

Install the Plugins

Use SSH to access the Poller that will be monitoring your Centreon MAP (Legacy) server.

Install all the required plugins with the following commands:

yum install centreon-plugin-Operatingsystems-Linux-Snmp centreon-plugin-Applications-Jvm-Actuator

Configure your services

Access your Centreon Web interface. Go to Configuration > Host > Add.

Fill in the basic information about your host and add the following host templates:

• OS-Linux-SNMP-custom
• App-Jvm-actuator-custom

To monitor centreon-map JVM, please use following macro values:

Name	Value
ACTUATORCUSTOMMODE	centreonmap
ACTUATORAPIURLPATH	/centreon-studio/api/beta
ACTUATORAPIUSERNAME	Api username must be set
ACTUATORAPIPASSWORD	Api password must be set

Remember to check the "Create Services linked to the Template too" checkbox.

You can now export your configuration, and your Centreon MAP (Legacy) server will be monitored.

You may also just check the access to the following URL that tells that the server is up or not:

HTTP

http://<MAP_IP>:8080/centreon-studio/api/beta/actuator/health.

HTTPS

https://<MAP_IP>:8443/centreon-studio/api/beta/actuator/health.

Centreon MAP (Legacy) configuration files

We advise you against editing the configuration files manually unless you are an experienced user.

The four configuration files are located in /etc/centreon-studio/. Their templates can be found in /etc/centreon-studio/templates/.

The configuration script replaces the macros in these templates and copies them to the folder /etc/centreon-studio.

If these files are modified, the server must be restarted with the command:

systemctl restart centreon-map

Do not delete any variables in these files! This may cause the server to malfunction or not to start up.

Backup of Centreon MAP (Legacy) server

Saved items

The saved items are:

• Saving configuration files (/etc/centreon-studio)
• Saving database centreon_studio

How it works?

The backup script is executed on a daily basis (2AM) with a cron job located in /etc/cron.d/centreon-map-server-backup:

#
# Cron to backup Centreon MAP server
#
PATH=/sbin:/bin:/usr/sbin:/usr/bin

# rewrite file with new cron line
CRONTAB_EXEC_USER=""

0 2 * * * root bash /usr/share/centreon-map-server/bin/centreon-map-server-backup.sh >> /var/log/centreon-studio/backup.log 2>&1

The backup centreon-map-server-yyyy-mm-dd.tar.gz is stored in BACKUP_DIR, which is defined in configuration file.

Backup parameters

Backup parameters are stored in /etc/centreon-studio/backup.conf

• ENABLE: enable/disable backup mechanism (default value: 0)
• BACKUP_DIR: where the backup is stored (default value: /var/backup)
• RETENTION_AGE: backup retention in days (default value: 8)

We advise to export backups to another resource in order to secure them.

Restore data from Centreon MAP (Legacy) server

Restore process is divided in several steps:

• Extracting backup
• Restoring configuration files
• Restoring database

We assume that you have followed the Centreon MAP (Legacy) server installation procedure to get a fresh install.

Extracting backup

Get the last centreon-map-server-yyyy-mm-dd.tar.gz backup and extract it into /tmp directory:

cd /tmp
tar xzf centreon-map-server-yyyy-mm-dd.tar.gz

Restoring configuration files

To restore configuration files, run the following command:

cp -R etc/centreon-studio/* /etc/centreon-studio/

Restoring database

To restore centreon_studio database, run the following command:

systemctl stop centreon-map
mysql -h <db_host> -u <db_user> -p<db_password> <db_name> < centreon-map-server.dump
systemctl start centreon-map

Change Centreon MAP (Legacy) server port

Mistakes when editing configuration files can lead to malfunctions of the software. We recommend that you make a backup of the file before editing it and that you only change the settings advised by Centreon.

By default, the Centreon MAP (Legacy) server is listening and sending information through the port 8080. If you set the SSL (see HTTPS/TLS Configuration, use the port 8443.

You can change this port (e.g., if you have a firewall on your network blocking these ports).

If the new port is below 1024, use this procedure below "Define port below 1024" instead.

On your Centreon MAP (Legacy) server, stop the Centreon MAP server:

systemctl stop centreon-map

Edit the studio-config.properties settings file located in /etc/centreon-studio:

vim /etc/centreon-studio/studio-config.properties

Add the following line at the MAP (Legacy) server section:

centreon-map.port=XXXX

Replace XXXX with the port you want.

Then restart the Centreon MAP (Legacy) server:

systemctl start centreon-map

Wait for Centreon MAP (Legacy) service to start completely (~30 sec to 1 minutes).

Test that your server is up and accessible on the new port you defined by entering the following URL in your web browser:

http://<MAP_IP>:<NEW_PORT>/centreon-studio/api/beta/actuator/health

Define port below 1024

You may want to setup your server to listen and send data through ports below 1024, such as port 80 or 443 (as these ports are rarely blocked by a firewall).

If you want to set a port below 1024, the method is different since all ports under 1024 are restricted and only accessible through special applications.

There are a few different workarounds for this issue. One method is "port forwarding" through the firewall.

For this example, set the MAP (Legacy) server to listen and send data through port 80. Replace each occurence of 80 with the port you want to use.

1. Check your firewall.

   On your MAP (Legacy) server, run the following command to check that the firewall is running:

   systemctl status iptables

   If your firewall is running, you will see the following output:

   Table: raw
   Chain PREROUTING (policy ACCEPT)
   num  target     prot opt source               destination
   
   Chain OUTPUT (policy ACCEPT)
   num  target     prot opt source               destination
   
   Table: mangle
   Chain PREROUTING (policy ACCEPT)
   num  target     prot opt source               destination
   ...
   ...
   ...

   If your firewall is stopped, you will see the following output:

   iptables: Firewall is not running.

   Start the firewall:

   systemctl start iptables

2. Enable a connection on the port for MAP (Legacy) for listening and sending.

   Execute the following lines on your console:

   /sbin/iptables -A OUTPUT -p tcp --dport 80 -j ACCEPT
   /sbin/iptables -A INPUT -p tcp --dport 80 -j ACCEPT

3. Add port forwarding.

   Execute the following line on your console:

   iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080

4. Restart and save.

   Restart your firewall:

   systemctl restart iptables

   Save this configuration so it will be applied each time you reboot your server:

   /sbin/iptables save

Your Centreon MAP (Legacy) server is now accessible on port 80. Check this by entering the following URL in your browser:

http://<MAP_IP>/centreon-studio/api/beta/actuator/health

You should see server's state:

{"status":"UP"}

Don't forget to update both your desktop client configuration and your web interface configuration.