Distributed pollers vs Standard pollers

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:

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!

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:

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