Просмотр кода страницы Не запускается Apache на CentOS 7 - AH00015: Unable to open logs

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=== Не запускается Apache на CentOS 7 - AH00015: Unable to open logs ===


Не стартует apache с ошибками:
 # service httpd status
 Redirecting to /bin/systemctl status  httpd.service
 * httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Wed 2016-06-01 09:50:28 EDT; 1min 20s ago
  Process: 5854 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=1/FAILURE)
  Process: 5852 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE)
 Main PID: 5852 (code=exited, status=1/FAILURE)
 Jun 01 09:50:28 70598 systemd[1]: Starting The Apache HTTP Server...
 Jun 01 09:50:28 70598 httpd[5852]: [Wed Jun 01 09:50:28.692165 2016] [so:warn] [pid 5852] AH01574: module ruid2_module is already  loaded, skipping
 Jun 01 09:50:28 70598 httpd[5852]: AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 0.1.19.19...s message
 Jun 01 09:50:28 70598 systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
 Jun 01 09:50:28 70598 kill[5854]: kill: cannot find process ""
 Jun 01 09:50:28 70598 systemd[1]: httpd.service: control process exited, code=exited status=1
 Jun 01 09:50:28 70598 systemd[1]: Failed to start The Apache HTTP Server.
 Jun 01 09:50:28 70598 systemd[1]: Unit httpd.service entered failed state.
 Jun 01 09:50:28 70598 systemd[1]: httpd.service failed.
 Hint: Some lines were ellipsized, use -l to show in full.

В логах apache можем наблюдать вот такое:
 AH00015: Unable to open logs
 AH00015: Unable to open logs
 AH00015: Unable to open logs
 AH00015: Unable to open logs
 AH00015: Unable to open logs
 AH00015: Unable to open logs
 AH00015: Unable to open logs

Данная ошибка означает что для запуска apache через systemd нехватает файловых дескрипторов, поэтому увеличиваем их командами:
  #  ulimit -n1000000
  #  mkdir -p /etc/systemd/system/httpd.service.d/
  #  echo -e "[Service]\nLimitNOFILE=1000000" >> /etc/systemd/system/httpd.service.d/nofile.conf
  #  systemctl daemon-reload
  #  systemctl restart httpd.service