3CX

Compatibility

This connector is designed to be compatible with the following products.

Product	Model	Versions
3CX	-	18.0.9.20

Pack assets

Templates

The Monitoring Connector 3CX brings a host template:

• App-VoIP-3cx-Restapi-custom

The connector brings the following service templates (sorted by the host template they are attached to):

App-VoIP-3cx-Restapi-custom

Service Alias	Service Template	Service Description
System	App-Voip-3cx-System-Restapi-custom	Check system health

The services listed above are created automatically when the App-VoIP-3cx-Restapi-custom host template is used.

Collected metrics & status

Here is the list of services for this connector, detailing all metrics linked to each service.

System

Metric name	Unit
system.calls.active.usage.count	count
system.calls.active.free.count	count
system.calls.active.usage.percentage	%
system.extensions.registered.count	count
service#status	N/A

Prerequisites

Depending on the type of administrator account you use, you'll find the necessary instructions in the 3CX's official documentation[FR].

Installing the monitoring connector

Pack

1. If the platform uses an online license, you can skip the package installation instruction below as it is not required to have the connector displayed within the Configuration > Monitoring Connector Manager menu. If the platform uses an offline license, install the package on the central server with the command corresponding to the operating system's package manager:

Alma / RHEL / Oracle Linux 8

dnf install centreon-pack-applications-voip-3cx-restapi

Alma / RHEL / Oracle Linux 9

dnf install centreon-pack-applications-voip-3cx-restapi

Debian 11 & 12

apt install centreon-pack-applications-voip-3cx-restapi

CentOS 7

yum install centreon-pack-applications-voip-3cx-restapi

2. Whatever the license type (online or offline), install the 3CX connector through the Configuration > Monitoring Connector Manager menu.

Plugin

Since Centreon 22.04, you can benefit from the 'Automatic plugin installation' feature. When this feature is enabled, you can skip the installation part below.

You still have to manually install the plugin on the poller(s) when:

• Automatic plugin installation is turned off
• You want to run a discovery job from a poller that doesn't monitor any resource of this kind yet

More information in the Installing the plugin section.

Use the commands below according to your operating system's package manager:

Alma / RHEL / Oracle Linux 8

dnf install centreon-plugin-Applications-Voip-3cx-Restapi

Alma / RHEL / Oracle Linux 9

dnf install centreon-plugin-Applications-Voip-3cx-Restapi

Debian 11 & 12

apt install centreon-plugin-applications-voip-3cx-restapi

CentOS 7

yum install centreon-plugin-Applications-Voip-3cx-Restapi

Using the monitoring connector

Using a host template provided by the connector

1. Log into Centreon and add a new host through Configuration > Hosts.
2. Fill in the Name, Alias & IP Address/DNS fields according to your resource's settings.
3. Apply the App-VoIP-3cx-Restapi-custom template to the host. A list of macros appears. Macros allow you to define how the connector will connect to the resource, and to customize the connector's behavior.
4. Fill in the macros you want. Some macros are mandatory.

Macro	Description	Default value	Mandatory
3CXUSERNAME	Define the username for authentication	USERLOGIN	X
3CXPASSWORD	Define the password associated with the username	USERPASSWORD	X
3CXPROTO	Define the protocol to reach the API (default: 'https')	https
3CXPORT	Define the port to connect to (default: '443')	443
3CXVERSION	Define the version of 3CX to monitor for the plugin to adapt to the API version. If this option is omitted, the plugin will assume the API is in the latest supported version. Example: 18.0.9.20 for version 18 update 9	18.0.9.20
3CXEXTRAOPTIONS	Any extra option you may want to add to every command (a --verbose flag for example). All options are listed here.

5. Deploy the configuration. The host appears in the list of hosts, and on the Resources Status page. The command that is sent by the connector is displayed in the details panel of the host: it shows the values of the macros.

Using a service template provided by the connector

1. If you have used a host template and checked Create Services linked to the Template too, the services linked to the template have been created automatically, using the corresponding service templates. Otherwise, create manually the services you want and apply a service template to them.
2. Fill in the macros you want (e.g. to change the thresholds for the alerts). Some macros are mandatory (see the table below).

System

Macro	Description	Default value	Mandatory
UNKNOWNSTATUS	Define the conditions to match for the status to be UNKNOWN. You can use the following variables: %{error}, %{service}
WARNINGCALLSACTIVEFREE	Thresholds
CRITICALCALLSACTIVEFREE	Thresholds
WARNINGCALLSACTIVEUSAGE	Thresholds
CRITICALCALLSACTIVEUSAGE	Thresholds
WARNINGCALLSACTIVEUSAGEPRCT	Thresholds
CRITICALCALLSACTIVEUSAGEPRCT	Thresholds
WARNINGEXTENSIONSREGISTERED	Thresholds
CRITICALEXTENSIONSREGISTERED	Thresholds
CRITICALSTATUS	Define the conditions to match for the status to be CRITICAL (default: '%{error} =~ /false/'). You can use the following variables: %{error}, %{service}	%{error} =~ /true/
WARNINGSTATUS	Define the conditions to match for the status to be WARNING. You can use the following variables: %{error}, %{service}
EXTRAOPTIONS	Any extra option you may want to add to the command (a --verbose flag for example). All options are listed here.

3. Deploy the configuration. The service appears in the list of services, and on the Resources Status page. The command that is sent by the connector is displayed in the details panel of the service: it shows the values of the macros.

How to check in the CLI that the configuration is OK and what are the main options for?

Once the plugin is installed, log into your Centreon poller's CLI using the centreon-engine user account (su - centreon-engine). Test that the connector is able to monitor a resource using a command like this one (replace the sample values by yours):

/usr/lib/centreon/plugins/centreon_3cx_restapi.pl \
    --plugin=apps::voip::3cx::restapi::plugin \
    --mode=system \
    --hostname='10.0.0.1' \
    --port='443' \
    --proto='https' \
    --api-username='USERLOGIN' \
    --api-password='USERPASSWORD' \
    --3cx-version='18.0.9.20'  \
    --unknown-status='' \
    --warning-status='' \
    --critical-status='%{error} =~ /true/' \
    --warning-calls-active-usage='' \
    --critical-calls-active-usage='' \
    --warning-calls-active-free='' \
    --critical-calls-active-free='' \
    --warning-calls-active-usage-prct='' \
    --critical-calls-active-usage-prct='' \
    --warning-extensions-registered='' \
    --critical-extensions-registered='' 

The expected command output is shown below:

OK: extensions registered: 70 All services are ok | 'system.calls.active.usage.count'=63;;;0;1000 'system.calls.active.free.count'=53;;;0;1000 'system.calls.active.usage.percentage'=44%;;;0;1000 'system.extensions.registered.count'=70;;;0;70

Troubleshooting

Please find the troubleshooting documentation for the API-based plugins in this chapter.

Available modes

In most cases, a mode corresponds to a service template. The mode appears in the execution command for the connector. In the Centreon interface, you don't need to specify a mode explicitly: its use is implied when you apply a service template. However, you will need to specify the correct mode for the template if you want to test the execution command for the connector in your terminal.

All available modes can be displayed by adding the --list-mode parameter to the command:

/usr/lib/centreon/plugins/centreon_3cx_restapi.pl \
    --plugin=apps::voip::3cx::restapi::plugin \
    --list-mode

The plugin brings the following modes:

Mode	Linked service template
extension [code]	Not used in this Monitoring Connector
system [code]	App-Voip-3cx-System-Restapi-custom

Available options

Modes options

All available options for each service template are listed below:

System

Option	Description
--mode	Define the mode in which you want the plugin to be executed (see--list-mode).
--dyn-mode	Specify a mode with the module's path (advanced).
--list-mode	List all available modes.
--mode-version	Check minimal version of mode. If not, unknown error.
--version	Return the version of the plugin.
--custommode	When a plugin offers several ways (CLI, library, etc.) to get information the desired one must be defined with this option.
--list-custommode	List all available custom modes.
--multiple	Multiple custom mode objects. This may be required by some specific modes (advanced).
--pass-manager	Define the password manager you want to use. Supported managers are: environment, file, keepass, hashicorpvault and teampass.
--verbose	Display extended status information (long output).
--debug	Display debug messages.
--filter-perfdata	Filter perfdata that match the regexp. Example: adding --filter-perfdata='avg' will remove all metrics that do not contain 'avg' from performance data.
--filter-perfdata-adv	Filter perfdata based on a "if" condition using the following variables: label, value, unit, warning, critical, min, max. Variables must be written either %{variable} or %(variable). Example: adding --filter-perfdata-adv='not (%(value) == 0 and %(max) eq "")' will remove all metrics whose value equals 0 and that don't have a maximum value.
--explode-perfdata-max	Create a new metric for each metric that comes with a maximum limit. The new metric will be named identically with a '_max' suffix). Example: it will split 'used_prct'=26.93%;0:80;0:90;0;100 into 'used_prct'=26.93%;0:80;0:90;0;100 'used_prct_max'=100%;;;;
--change-perfdata --extend-perfdata	Change or extend perfdata. Syntax: --extend-perfdata=searchlabel,newlabel,target[,[newuom],[min],[m ax]] Common examples: Convert storage free perfdata into used: --change-perfdata='free,used,invert()' Convert storage free perfdata into used: --change-perfdata='used,free,invert()' Scale traffic values automatically: --change-perfdata='traffic,,scale(auto)' Scale traffic values in Mbps: --change-perfdata='traffic_in,,scale(Mbps),mbps' Change traffic values in percent: --change-perfdata='traffic_in,,percent()'
--extend-perfdata-group	Add new aggregated metrics (min, max, average or sum) for groups of metrics defined by a regex match on the metrics' names. Syntax: --extend-perfdata-group=regex,namesofnewmetrics,calculation[,[ne wuom],[min],[max]] regex: regular expression namesofnewmetrics: how the new metrics' names are composed (can use $1, $2... for groups defined by () in regex). calculation: how the values of the new metrics should be calculated newuom (optional): unit of measure for the new metrics min (optional): lowest value the metrics can reach max (optional): highest value the metrics can reach Common examples: Sum wrong packets from all interfaces (with interface need --units-errors=absolute): --extend-perfdata-group=',packets_wrong,sum(packets_(discard |error)_(in|out))' Sum traffic by interface: --extend-perfdata-group='traffic_in_(.*),traffic_$1,sum(traf fic_(in|out)_$1)'
--change-short-output --change-long-output	Modify the short/long output that is returned by the plugin. Syntax: --change-short-output=pattern~replacement~modifier Most commonly used modifiers are i (case insensitive) and g (replace all occurrences). Example: adding --change-short-output='OK~Up~gi' will replace all occurrences of 'OK', 'ok', 'Ok' or 'oK' with 'Up'
--change-exit	Replace an exit code with one of your choice. Example: adding --change-exit=unknown=critical will result in a CRITICAL state instead of an UNKNOWN state.
--range-perfdata	Rewrite the ranges displayed in the perfdata. Accepted values: 0: nothing is changed. 1: if the lower value of the range is equal to 0, it is removed. 2: remove the thresholds from the perfdata.
--filter-uom	Mask the units when they don't match the given regular expression.
--opt-exit	Replace the exit code in case of an execution error (i.e. wrong option provided, SSH connection refused, timeout, etc). Default: unknown.
--output-ignore-perfdata	Remove all the metrics from the service. The service will still have a status and an output.
--output-ignore-label	Remove the status label ("OK:", "WARNING:", "UNKNOWN:", CRITICAL:") from the beginning of the output. Example: 'OK: Ram Total:...' will become 'Ram Total:...'
--output-xml	Return the output in XML format (to send to an XML API).
--output-json	Return the output in JSON format (to send to a JSON API).
--output-openmetrics	Return the output in OpenMetrics format (to send to a tool expecting this format).
--output-file	Write output in file (can be combined with json, xml and openmetrics options). E.g.: --output-file=/tmp/output.txt will write the output in /tmp/output.txt.
--disco-format	Applies only to modes beginning with 'list-'. Returns the list of available macros to configure a service discovery rule (formatted in XML).
--disco-show	Applies only to modes beginning with 'list-'. Returns the list of discovered objects (formatted in XML) for service discovery.
--float-precision	Define the float precision for thresholds (default: 8).
--source-encoding	Define the character encoding of the response sent by the monitored resource Default: 'UTF-8'.
--hostname	Define the name or the address of the 3CX server.
--port	Define the port to connect to (default: '443').
--proto	Define the protocol to reach the API (default: 'https').
--3cx-version	Define the version of 3CX to monitor for the plugin to adapt to the API version. If this option is omitted, the plugin will assume the API is in the latest supported version. Example: 18.0.9.20 for version 18 update 9.
--api-username	Define the username for authentication.
--api-password	Define the password associated with the username.
--timeout	Define the timeout in seconds (default: 30).
--unknown-http-status	Define the conditions to match on the HTTP Status for the returned status to be UNKNOWN. Default: '%{http_code} \< 200 or %{http_code} >= 300'
--warning-http-status	Define the conditions to match on the HTTP Status for the returned status to be WARNING. Example: '%{http_code} == 500'
--critical-http-status	Define the conditions to match on the HTTP Status for the returned status to be CRITICAL. Example: '%{http_code} == 500'
--http-peer-addr	Set the address you want to connect to. Useful if hostname is only a vhost, to avoid IP resolution.
--proxyurl	Proxy URL. Example: http://my.proxy:3128
--proxypac	Proxy pac file (can be a URL or a local file).
--insecure	Accept insecure SSL connections.
--http-backend	Perl library to use for HTTP transactions. Possible values are: lwp (default) and curl.
--ssl-opt	Set SSL Options (--ssl-opt="SSL_version => TLSv1" --ssl-opt="SSL_verify_mode => SSL_VERIFY_NONE").
--curl-opt	Set CURL Options (--curl-opt="CURLOPT_SSL_VERIFYPEER => 0" --curl-opt="CURLOPT_SSLVERSION => CURL_SSLVERSION_TLSv1_1" ).
--memcached	Memcached server to use (only one server).
--redis-server	Redis server to use (only one server). Syntax: address[:port]
--redis-attribute	Set Redis Options (--redis-attribute="cnx_timeout=5").
--redis-db	Set Redis database index.
--failback-file	Failback on a local file if Redis connection fails.
--memexpiration	Time to keep data in seconds (default: 86400).
--statefile-dir	Define the cache directory (default: '/var/lib/centreon/centplugins').
--statefile-suffix	Define a suffix to customize the statefile name (default: '').
--statefile-concat-cwd	If used with the '--statefile-dir' option, the latter's value will be used as a sub-directory of the current working directory. Useful on Windows when the plugin is compiled, as the file system and permissions are different from Linux.
--statefile-format	Define the format used to store the cache. Available formats: 'dumper', 'storable', 'json' (default).
--statefile-key	Define the key to encrypt/decrypt the cache.
--statefile-cipher	Define the cipher algorithm to encrypt the cache (default: 'AES').
--filter-category	Filter updates' category.
--unknown-status	Define the conditions to match for the status to be UNKNOWN. You can use the following variables: %{error}, %{service}
--warning-status	Define the conditions to match for the status to be WARNING. You can use the following variables: %{error}, %{service}
--critical-status	Define the conditions to match for the status to be CRITICAL (default: '%{error} =~ /false/'). You can use the following variables: %{error}, %{service}
--warning- --critical-	Thresholds. Can be: 'calls-active-usage', 'calls-active-free', 'calls-active-usage-prct', 'extensions-registered'.

All available options for a given mode can be displayed by adding the --help parameter to the command:

/usr/lib/centreon/plugins/centreon_3cx_restapi.pl \
    --plugin=apps::voip::3cx::restapi::plugin \
    --mode=system \
    --help