1.7 KiB
= Distributed Poller = LibreNMS has the ability to distribute polling of devices to other machines.
These machines can be in a different physical location and therefore minimize network latencies for colocations.
Devices can also be groupped together into a poller_group to pin these devices to a single or a group of designated pollers.
All pollers need to share their RRD-folder, for example via NFS or a combination of NFS and rrdcached.
It is also required that all pollers can access the central memcached to communicate with eachother.
In order to enable distributed polling, set $config['distributed_poller'] = true and your memcached details into $config['distributed_poller_memcached_host'] and $config['distributed_poller_memcached_port'].
By default, all hosts are shared and have the poller_group = 0. To pin a device to a poller, set it to a value greater than 0 and set the same value in the poller's config with $config['distributed_poller_group'].
Usually the poller's name is equal to the machine's hostname, if you want to change it set $config['distributed_poller_name'].
Note: Eventhough you pin devices to pollers, these pollers will still poll devices with poller_group = 0. If you do not want this, consequently define groups for all your devices!
== Configuration ==
// Distributed Poller-Settings
$config['distributed_poller'] = false;
$config['distributed_poller_name'] = file_get_contents('/proc/sys/kernel/hostname');
$config['distributed_poller_group'] = 0;
$config['distributed_poller_memcached_host'] = 'example.net';
$config['distributed_poller_memcached_port'] = '11211';