Antivirus ClamAV

Pack assets

Templates

The Monitoring Connector Antivirus ClamAV brings a host template:

• App-Antivirus-Clamav-SSH-custom

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

App-Antivirus-Clamav-SSH-custom

Service Alias	Service Template	Service Description
Update-Status	App-Antivirus-Clamav-Update-Status-SSH-custom	Check antivirus update status

The services listed above are created automatically when the App-Antivirus-Clamav-SSH-custom host template is used.

Collected metrics & status

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

Update-Status

Metric name	Unit
engine-status	N/A
maindb-status	N/A
dailydb-status	N/A

To obtain this new metric format, include --use-new-perfdata in the EXTRAOPTIONS service macro.

Prerequisites

SSH configuration

A user is required to query the resource by SSH. There is no need for root or sudo privileges. There are two possible ways to log in through SSH, either by exchanging the SSH key from centreon-engine user to the target resource, or by setting your unique user and password directly in the host macros.

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-antivirus-clamav-ssh

Alma / RHEL / Oracle Linux 9

dnf install centreon-pack-applications-antivirus-clamav-ssh

Debian 11 & 12

apt install centreon-pack-applications-antivirus-clamav-ssh

CentOS 7

yum install centreon-pack-applications-antivirus-clamav-ssh

2. Whatever the license type (online or offline), install the Antivirus ClamAV 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-Clamav-Ssh

Alma / RHEL / Oracle Linux 9

dnf install centreon-plugin-Applications-Clamav-Ssh

Debian 11 & 12

apt install centreon-plugin-applications-clamav-ssh

CentOS 7

yum install centreon-plugin-Applications-Clamav-Ssh

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-Antivirus-Clamav-SSH-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
SSHUSERNAME	Define the user name to log in to the host
SSHPASSWORD	Define the password associated with the user name. Cannot be used with the sshcli backend. Warning: using a password is not recommended. Use --ssh-priv-key instead
SSHPORT	Define the TCP port on which SSH is listening
SSHBACKEND	Define the backend you want to use. It can be: sshcli (default), plink and libssh	libssh
SSHEXTRAOPTIONS	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).

Update-Status

Macro	Description	Default value	Mandatory
CRITICALDAILYDBSTATUS	Define the conditions to match for the status to be CRITICAL. You can use the following variables: %{last_dailydb_version}, %{current_dailydb_version}, %{current_dailydb_timediff}	%{last_dailydb_version} ne %{current_dailydb_version} || %{current_dailydb_timediff} > 432000
WARNINGDAILYDBSTATUS	Define the conditions to match for the status to be WARNING. You can use the following variables: %{last_dailydb_version}, %{current_dailydb_version}, %{current_dailydb_timediff}
WARNINGENGINESTATUS	Define the conditions to match for the status to be WARNING. You can use the following variables: %{last_engine_version}, %{current_engine_version}
CRITICALENGINESTATUS	Define the conditions to match for the status to be CRITICAL (default: '%{last_engine_version} ne %{current_engine_version}'). You can use the following variables: %{last_engine_version}, %{current_engine_version}
CRITICALMAINDBSTATUS	Define the conditions to match for the status to be CRITICAL. You can use the following variables: %{last_maindb_version}, %{current_maindb_version}, %{current_maindb_timediff}	%{last_maindb_version} ne %{current_maindb_version}
WARNINGMAINDBSTATUS	Define the conditions to match for the status to be WARNING.You can use the following variables: %{last_maindb_version}, %{current_maindb_version}, %{current_maindb_timediff}
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_clamav_ssh.pl \
    --plugin=apps::antivirus::clamav::local::plugin \
    --mode=update-status \
    --hostname='10.0.0.1' \
    --ssh-backend='libssh' \
    --ssh-username='' \
    --ssh-password='' \
    --ssh-port=''  \
    --warning-engine-status='' \
    --critical-engine-status='' \
    --warning-maindb-status='' \
    --critical-maindb-status='%{last_maindb_version} ne %{current_maindb_version}' \
    --warning-dailydb-status='' \
    --critical-dailydb-status='%{last_dailydb_version} ne %{current_dailydb_version} || %{current_dailydb_timediff} > 432000' 

The expected command output is shown below:

OK : clamav engine version '0.103.2/0.103.2' main.cvd version '60/60', last update 1d 3h 46m 40s daily.cvd version '25839/25839', last update 1d 3h 46m 40s | 

Troubleshooting

Please find the troubleshooting documentation for Centreon Plugins typical issues.

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_clamav_ssh.pl \
    --plugin=apps::antivirus::clamav::local::plugin \
    --list-mode

The plugin brings the following modes:

Mode	Linked service template
update-status [code]	App-Antivirus-Clamav-Update-Status-SSH-custom

Available options

Modes options

All available options for each service template are listed below:

Update-Status

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	Hostname to query in ssh.
--timeout	Timeout in seconds for the command (default: 45). Default value can be override by the mode.
--command	Command to get information. Used it you have output in a file.
--command-path	Command path.
--command-options	Command options.
--sudo sudo command	.
--ssh-backend	Define the backend you want to use. It can be: sshcli (default), plink and libssh.
--ssh-username	Define the user name to log in to the host.
--ssh-password	Define the password associated with the user name. Cannot be used with the sshcli backend. Warning: using a password is not recommended. Use --ssh-priv-key instead.
--ssh-port	Define the TCP port on which SSH is listening.
--ssh-priv-key	Define the private key file to use for user authentication.
--sshcli-command	ssh command (default: 'ssh').
--sshcli-path	ssh command path (default: none)
--sshcli-option	Specify ssh cli options (example: --sshcli-option='-o=StrictHostKeyChecking=no').
--plink-command	plink command (default: 'plink').
--plink-path	plink command path (default: none)
--plink-option	Specify plink options (example: --plink-option='-T').
--libssh-strict-connect	Connection won't be OK even if there is a problem (server known changed or server found other) with the ssh server.
--info	%(maindb-file)'
--nameservers	Set nameserver to query (can be multiple). The system configuration is used by default.
--maindb-file	Antivirus main.cvd file (default: '/var/lib/clamav/main.cvd').
--dailydb-file	Antivirus daily.cvd file (default: '/var/lib/clamav/daily.cvd').
--warning-engine-status	Define the conditions to match for the status to be WARNING (default: '') You can use the following variables: %{last_engine_version}, %{current_engine_version}
--critical-engine-status	Define the conditions to match for the status to be CRITICAL (default: '%{last_engine_version} ne %{current_engine_version}'). You can use the following variables: %{last_engine_version}, %{current_engine_version}
--warning-maindb-status	Define the conditions to match for the status to be WARNING (default: '') You can use the following variables: %{last_maindb_version}, %{current_maindb_version}, %{current_maindb_timediff}
--critical-maindb-status	Define the conditions to match for the status to be CRITICAL (default: '%{last_maindb_version} ne %{current_maindb_version}'). You can use the following variables: %{last_maindb_version}, %{current_maindb_version}, %{current_maindb_timediff}
--warning-dailydb-status	Define the conditions to match for the status to be WARNING (default: '') You can use the following variables: %{last_dailydb_version}, %{current_dailydb_version}, %{current_dailydb_timediff}
--critical-dailydb-status	Define the conditions to match for the status to be CRITICAL (default: '%{last_dailydb_version} ne %{current_dailydb_version} || %{current_dailydb_timediff} > 432000'). You can use the following variables: %{last_dailydb_version}, %{current_dailydb_version}, %{current_dailydb_timediff}

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

/usr/lib/centreon/plugins/centreon_clamav_ssh.pl \
    --plugin=apps::antivirus::clamav::local::plugin \
    --mode=update-status \
    --help