I am trying to start the httpd service on RHEL 7.

When I run systemctl start httpd, it fails.

Here is the output of journalctl -xe. There are no apparent error message for httpd, Would the errors for polkitd be affecting apache? How would I resolve these?

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:
--
-- 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:
--
-- 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: log output and additional info

Here is the output of tail -f 10 /var/log/httpd/error_log. The log files are stored on an NFS mounted directory (hosted remotely). I can edit the files from the machine running apache, but apache itself doesn't seem to be able to write to them.

==> /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: Additional logs

[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

2

2 Answers

If your RHEL 7 system has SELinux enforcing, you need to enable the SELinux boolean values to get NFS working. To check if your system is utilizing SELinux:

# getenforce

If the above returns enforcing, please continue:

# getsebool -a | grep httpd_use_nfs

If the above returns httpd_use_nfs --> off, run the following command to permanently allow Apache to use NFS.

# setsebool -P httpd_use_nfs on

Apache should be allowed to write to those error log files now.

9

Try apachectl configtest and you will see the error

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