Varnish NRPE
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Overview​
The Monitoring Connector Varnish works with the Centreon NSClient++ monitoring agent on Windows and NRPE Server on Linux to check the performance and behavior of a Varnish HTTP Cache Server.
Pack assets​
Monitored objects​
- Varnish Cache statistics
Collected metrics​
Coming soon
Prerequisites​
Command-line utility​
The Plugin uses the varnishstat binary.
NRPE Server​
On RPM-Based distribution, you can use the centreon-nrpe3-daemon package deploying a preconfigured version of the NRPE Server.
Most of the Linux distributions provide a NRPE package you can deploy using the system package default manager. When using these, it's important to modify following directives in the config files:
allowed_hosts
[...]
# ALLOWED HOST ADDRESSES
# This is an optional comma-delimited list of IP address or hostnames
# that are allowed to talk to the NRPE daemon. Network addresses with a bit mask
# (i.e. 192.168.1.0/24) are also supported. Hostname wildcards are not currently
# supported.
allowed_hosts=X.X.X.X,X.Y.Z.V
[...]
dont_blame_nrpe
[...]
# ALLOWED HOST ADDRESSES
# This is an optional comma-delimited list of IP address or hostnames
# that are allowed to talk to the NRPE daemon. Network addresses with a bit mask
# (i.e. 192.168.1.0/24) are also supported. Hostname wildcards are not currently
# supported.
dont_blame_nrpe=1
[...]
Important note: the NASTY_METACHARS parameter should be left as its default value.
Modifying it might open serious security hole and RCE exploitation from an attacker.
Installation​
- Online License
- Offline License
- Install the Centreon NRPE Client package on every Poller expected to monitor Varnish:
yum install centreon-nrpe3-plugin
- On the Centreon Web interface, install the Centreon Pack Varnish from the Configuration > Monitoring Connector Manager page
- Install the Centreon package on every Poller expected to monitor Varnish:
yum install centreon-nrpe-plugin
- Install the Centreon Pack RPM on the Centreon Central server:
yum install centreon-pack-applications-varnish-nrpe
- On the Centreon Web interface, install the Centreon Pack Varnish from the Configuration > Monitoring Connector Manager page
Host configuration​
- Log into Centreon and add a new Host through "Configuration > Hosts".
- Apply the App-Varnish-NRPE-custom template and configure all the mandatory Macros:
| Mandatory | Name | Description |
|---|---|---|
| X | NRPECLIENT | NRPE Plugin binary to use (Default: 'check_centreon_nrpe') |
| X | NRPEPORT | NRPE Port of the target server (Default: '5666') |
| X | NRPETIMEOUT | Timeout value (Default: '30') |
| X | NRPEEXTRAOPTIONS | Extraoptions to use with the NRPE binary (default: '-u -m 8192') |