Distributed pollers vs Standard pollers

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1

The output of ./validate.php
webserver:

Component Version
LibreNMS 22.7.0-36-gb12400861
DB Schema 2022_07_19_081224_plugins_unique_index (244)
PHP 7.4.30
Python 3.9.2
Database MariaDB 10.5.15-MariaDB-0+deb11u1
RRDTool 1.7.2
SNMP 5.9
====================================

[OK] Composer Version: 2.3.10
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database Schema is current
[OK] SQL Server meets minimum requirements
[OK] lower_case_table_names is enabled
[OK] MySQL engine is optimal
[OK]
[OK] Database schema correct
[OK] MySQl and PHP time match
[OK] Distributed Polling setting is enabled globally
[OK] Connected to rrdcached
[WARN] PHP version 8.1 is the minimum supported version as of September, 2022. We recommend you update PHP to a supported version (8.1 suggested) to continue to receive updates. If you do not update PHP, LibreNMS will continue to function but stop receiving bug fixes and updates.
[FAIL] Missing PHP extension: memcached
[FIX]:
Please install memcached
[OK] Active pollers found
[OK] Dispatcher Service is enabled
[OK] Locks are functional
[OK] No active python wrapper pollers found
[OK] Redis is functional
[OK] rrdtool version ok
[OK] Connected to rrdcached

poller01:

Component Version
LibreNMS 22.7.0-36-gb12400861
DB Schema 2022_07_19_081224_plugins_unique_index (244)
PHP 7.4.30
Python 3.9.2
Database MariaDB 10.5.15-MariaDB-0+deb11u1
RRDTool 1.7.2
SNMP 5.9
====================================

[OK] Composer Version: 2.3.10
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database Schema is current
[OK] SQL Server meets minimum requirements
[OK] lower_case_table_names is enabled
[OK] MySQL engine is optimal
[OK]
[OK] Database schema correct
[OK] MySQl and PHP time match
[OK] Distributed Polling setting is enabled globally
[OK] Connected to rrdcached
[WARN] PHP version 8.1 is the minimum supported version as of September, 2022. We recommend you update PHP to a supported version (8.1 suggested) to continue to receive updates. If you do not update PHP, LibreNMS will continue to function but stop receiving bug fixes and updates.
[FAIL] Missing PHP extension: memcached
[FIX]:
Please install memcached
[OK] Active pollers found
[OK] Dispatcher Service is enabled
[OK] Locks are functional
[OK] No active python wrapper pollers found
[OK] Redis is functional
[OK] rrdtool version ok
[OK] Connected to rrdcached
[WARN] Your local git contains modified files, this could prevent automatic updates.
[FIX]:
You can fix this with ./scripts/github-remove
Modified Files:
bootstrap/cache/.gitignore
config.php.default
logs/.gitignore
rrd/.gitignore
storage/app/.gitignore
storage/app/public/.gitignore
storage/debugbar/.gitignore
storage/framework/cache/.gitignore
storage/framework/cache/data/.gitignore
storage/framework/sessions/.gitignore
storage/framework/testing/.gitignore
storage/framework/views/.gitignore
storage/logs/.gitignore

poller02:

Component Version
LibreNMS 22.7.0-36-gb12400861
DB Schema 2022_07_19_081224_plugins_unique_index (244)
PHP 7.4.30
Python 3.9.2
Database MariaDB 10.5.15-MariaDB-0+deb11u1
RRDTool 1.7.2
SNMP 5.9
====================================

[OK] Composer Version: 2.3.10
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database Schema is current
[OK] SQL Server meets minimum requirements
[OK] lower_case_table_names is enabled
[OK] MySQL engine is optimal
[OK]
[OK] Database schema correct
[OK] MySQl and PHP time match
[OK] Distributed Polling setting is enabled globally
[OK] Connected to rrdcached
[WARN] PHP version 8.1 is the minimum supported version as of September, 2022. We recommend you update PHP to a supported version (8.1 suggested) to continue to receive updates. If you do not update PHP, LibreNMS will continue to function but stop receiving bug fixes and updates.
[FAIL] Missing PHP extension: memcached
[FIX]:
Please install memcached
[OK] Active pollers found
[OK] Dispatcher Service is enabled
[OK] Locks are functional
[OK] No active python wrapper pollers found
[OK] Redis is functional
[OK] rrdtool version ok
[OK] Connected to rrdcached
[WARN] Your local git contains modified files, this could prevent automatic updates.
[FIX]:
You can fix this with ./scripts/github-remove
Modified Files:
config.php.default

poller03:

Component Version
LibreNMS 22.7.0-36-gb12400861
DB Schema 2022_07_19_081224_plugins_unique_index (244)
PHP 7.4.30
Python 3.9.2
Database MariaDB 10.5.15-MariaDB-0+deb11u1
RRDTool 1.7.2
SNMP 5.9
====================================

[OK] Composer Version: 2.3.10
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database Schema is current
[OK] SQL Server meets minimum requirements
[OK] lower_case_table_names is enabled
[OK] MySQL engine is optimal
[OK]
[OK] Database schema correct
[OK] MySQl and PHP time match
[OK] Distributed Polling setting is enabled globally
[OK] Connected to rrdcached
[WARN] PHP version 8.1 is the minimum supported version as of September, 2022. We recommend you update PHP to a supported version (8.1 suggested) to continue to receive updates. If you do not update PHP, LibreNMS will continue to function but stop receiving bug fixes and updates.
[FAIL] Missing PHP extension: memcached
[FIX]:
Please install memcached
[OK] Active pollers found
[OK] Dispatcher Service is enabled
[OK] Locks are functional
[OK] No active python wrapper pollers found
[OK] Redis is functional
[OK] rrdtool version ok
[OK] Connected to rrdcached
[WARN] Your local git contains modified files, this could prevent automatic updates.
[FIX]:
You can fix this with ./scripts/github-remove
Modified Files:
config.php.default

I am using the Dispatcher service and i have disables all cronjobs according to:

But when i disable the cronjob, all the pollers become red in de Poller page in the WebGUI:

image
image1893×934 63.4 KB

The last checkin, in the Poller Cluster Health, shows the correct time when the polling has finished, but in the Standard pollers sections, all pollers becomes red. How can i fix this, or can i delete them because i am using the distributed polling setup?

Thanks in advance!

2

I just removed them from the standard poller page and everything is running fine! I was double-polling devices (using the cron.d settings AND the libre-service.py settings). After i removed the cron.d polling, CPU went down and everything runs smooth again! I even removed the poller03 :slight_smile:

3

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