Access logs are not rotated on Plesk server: Rotation of files with multiple hard links is not allowed

Symptoms

• Log rotation doesn't rotate logs, resulting in no compressed .gz files being created.

• Forcing log rotation for specific domain results in error

  # /usr/local/psa/logrotate/sbin/logrotate -v -f /usr/local/psa/etc/logrotate.d/example.com
  (...)
  considering log /var/www/vhosts/system/example.com/logs/access_log.processed log /var/www/vhosts/system/example.com/logs/access_log.processed has multiple (2) hard links. Rotation of files with multiple hard links is not allowed for /var/www/vhosts/system/example.com/logs/*.processed -- skipping.
  (...)

Cause

Product issues:

• #PPPM-13473 "Log rotation now works correctly after updating to Plesk Obsidian 18.0.42."
  Fixed in:
  • Plesk Obsidian 12 April 2022 (Linux)
• #PPPM-13519 "Log rotation now works correctly after updating to Plesk Obsidian 18.0.43 even if /usr/local/psa/etc/logrotate.conf was customized."
  Fixed in:
  • Plesk Obsidian 24 May 2022 (Linux)
• #PPPM-13562 reported but not solved.

Resolution

Please consider updating your server:

• How to install Plesk updates

Workaround

If update is not possible for some reason, you may try the following
It is possible to use the sed command to add allowhardlink option to all logrotate config files.

1. Connect to the Plesk server via SSH.

2. Use the following command to apply the option to all logrotate configuration files:

   # sed -i '/copytruncate/a allowhardlink' /usr/local/psa/etc/logrotate.d/*

3. Force rotation:

   To rotate logs for a single domain:

   # /usr/local/psa/admin/sbin/statistics --calculate-one --domain-name=example.com

   To rotate logs for all domains:

   # /usr/local/psa/bin/sw-engine-pleskrun /usr/local/psa/admin/plib/DailyMaintainance/script.php -f ExecuteStatistics