Plesk PHP-FPM service(s) fail to start during reboot on systemd servers: No pool defined

Symptoms

• PHP-FPM services fail to start on server reboot:

  # systemctl status plesk-php71-fpm
  plesk-php71-fpm - The PHP 7.1 FastCGI Process Manager
  Loaded: loaded (/usr/lib/systemd/system/plesk-php71-fpm.service; disabled; vendor preset: disabled)
  Active: failed (Result: exit-code) since Tue 2017-08-29 00:07:31 +0430; 12h ago

• The following records can be found in the systemctl logs for the same PHP-FPM version:

  # less /var/log/plesk-php71-fpm/error.log
  ERROR: No pool defined. at least one pool section must be specified in config file
  ERROR: failed to post process the configuration
  ERROR: FPM initialization failed

• PHP-FPM configuration files exist for a particular Plesk PHP version, for example:

  # ls /opt/plesk/php/7.1/etc/php-fpm.d/*.conf | wc -l
  5

• systemd init system is used on a server:

  # ps -p 1
  PID TTY TIME CMD
  1 ? 00:08:31 systemd

Cause

During the server reboot, web services started before network services were completely initiated.

Resolution

1. Connect to the server via SSH;

2. Edit the following file: /etc/systemd/system.conf;

3. Increase the value of the DefaultTimeoutStartSec parameter. For example, to 600s

   # grep DefaultTimeoutStartSec/etc/systemd/system.conf
   DefaultTimeoutStartSec=600s