O Apache não iniciará, nenhuma mensagem de erro do httpd

Question

Estou tentando iniciar o serviço httpd no RHEL 7.

Quando executo systemctl start httpd , ele falha.

Aqui está a saída de journalctl -xe . Não há mensagem de erro aparente para o httpd. Os erros do polkitd afetariam o apache? Como eu resolveria isso?

Jun 10 10:59:50 localhost.localdomain polkitd[850]: Registered Authentication Agent for unix-process:4462:116143 (system bus name :1.57 [/usr/bin/pkttyagent --notify-fd 5 --fallback], object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
Jun 10 10:59:50 localhost.localdomain systemd[1]: Starting The Apache HTTP Server...
-- Subject: Unit httpd.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit httpd.service has begun starting up. 
Jun 10 10:59:50 localhost.localdomain systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
Jun 10 10:59:50 localhost.localdomain kill[4468]: kill: cannot find process ""
Jun 10 10:59:50 localhost.localdomain systemd[1]: httpd.service: control process exited, code=exited status=1
Jun 10 10:59:50 localhost.localdomain systemd[1]: Failed to start The Apache HTTP Server.
-- Subject: Unit httpd.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit httpd.service has failed.
--
-- The result is failed.
Jun 10 10:59:50 localhost.localdomain systemd[1]: Unit httpd.service entered failed state.
Jun 10 10:59:50 localhost.localdomain systemd[1]: httpd.service failed.
Jun 10 10:59:50 localhost.localdomain polkitd[850]: Unregistered Authentication Agent for unix-process:4462:116143 (system bus name :1.57, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus)

EDIT: saída de log e informações adicionais

Aqui está a saída de tail -f 10 /var/log/httpd/error_log . Os arquivos de log são armazenados em um diretório montado pelo NFS (hospedado remotamente). Eu posso editar os arquivos da máquina rodando o apache, mas o próprio apache não parece ser capaz de escrever para eles.

==> /var/log/httpd/error_log <==
(13)Permission denied: AH00091: httpd: could not open error log file /data/web/logs/new-error.log.
AH00015: Unable to open logs
(13)Permission denied: AH00091: httpd: could not open error log file /data/web/logs/new-error.log.
AH00015: Unable to open logs
(13)Permission denied: AH00091: httpd: could not open error log file /data/web/logs/new-error.log.
AH00015: Unable to open logs
(13)Permission denied: AH00091: httpd: could not open error log file /data/web/logs/new-error.log.
AH00015: Unable to open logs
(13)Permission denied: AH00091: httpd: could not open error log file /data/web/logs/io-new-error.log.
AH00015: Unable to open logs

EDIT 2: Registros adicionais

[root@localhost web]# sealert -a /var/log/audit/audit.log
 78% donetype=AVC msg=audit(1465576122.933:606): avc:  denied  { write } for  pid=4384 comm="httpd" name="logs" dev="0:38" ino=1060076 scontext=system_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nfs_t:s0 tclass=dir

**** Invalid AVC allowed in current policy ***

type=AVC msg=audit(1465576695.541:615): avc:  denied  { read } for  pid=4489 comm="httpd" name="sims" dev="0:38" ino=1060159 scontext=system_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nfs_t:s0 tclass=lnk_file

**** Invalid AVC allowed in current policy ***

 78% donetype=AVC msg=audit(1465576695.580:616): avc:  denied  { read } for  pid=4489 comm="httpd" name="sims" dev="0:38" ino=1060159 scontext=system_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nfs_t:s0 tclass=lnk_file

**** Invalid AVC allowed in current policy ***

type=AVC msg=audit(1465576695.581:617): avc:  denied  { write } for  pid=4489 comm="httpd" name="logs" dev="0:38" ino=1060076 scontext=system_u:system_r:httpd_t:s0 tcontext=system_u:object_r:nfs_t:s0 tclass=dir

**** Invalid AVC allowed in current policy ***

100% done
found 0 alerts in /var/log/audit/audit.log

    

Answer 1

Se o seu sistema RHEL 7 possui o SELinux enforcing , você precisa ativar os valores booleanos do SELinux para que o NFS funcione. Para verificar se o seu sistema está utilizando o SELinux:

# getenforce

Se o acima retornar enforcing , continue:

# getsebool -a | grep httpd_use_nfs

Se o acima retornar httpd_use_nfs --> off , execute o seguinte comando para permitir permanentemente que o Apache use o NFS.

# setsebool -P httpd_use_nfs on

O Apache deve ter permissão para gravar nesses arquivos de log de erros agora.