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24 lines
1.5 KiB
Markdown
24 lines
1.5 KiB
Markdown
# Distributed Poller
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LibreNMS has the ability to distribute polling of devices to other machines.
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These machines can be in a different physical location and therefore minimize network latencies for colocations.
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Devices can also be groupped together into a `poller_group` to pin these devices to a single or a group of designated pollers.
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All pollers need to share their RRD-folder, for example via NFS or a combination of NFS and rrdcached.
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It is also required that all pollers can access the central memcached to communicate with eachother.
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In order to enable distributed polling, set `$config['distributed_poller'] = true` and your memcached details into `$config['distributed_poller_memcached_host']` and `$config['distributed_poller_memcached_port']`.
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By default, all hosts are shared and have the `poller_group = 0`. To pin a device to a poller, set it to a value greater than 0 and set the same value in the poller's config with `$config['distributed_poller_group']`.
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Usually the poller's name is equal to the machine's hostname, if you want to change it set `$config['distributed_poller_name']`.
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## Configuration
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```php
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// Distributed Poller-Settings
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$config['distributed_poller'] = false;
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$config['distributed_poller_name'] = file_get_contents('/proc/sys/kernel/hostname');
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$config['distributed_poller_group'] = 0;
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$config['distributed_poller_memcached_host'] = 'example.net';
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$config['distributed_poller_memcached_port'] = '11211';
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```
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