Apache – How to Fix PidFile Directory Removal on Boot

Every time the server is rebooted, the directory /run/httpd is removed. /run is a tmpfs filesystem, therefore, mounted in RAM.

/run/httpd is created only during installation. When I start httpd after reboot, the directory isn't recreated.

Server has installed CentOS 7 and the oficial repository Apache package (v. 2.4.6-18).

After Apache install and start, the directory is as bellow:

# ls -alR /run/httpd/
/run/httpd/:
total 8
drwx--x---.  3 root   apache  120 Sep 30 08:39 .
drwxr-xr-x. 28 root   root   1020 Sep 30 08:37 ..
-rw-r--r--.  1 root   root      8 Sep 30 08:39 authdigest_shm.2953
drwx------.  2 apache apache   40 Jul 23 10:48 htcacheclean
-rw-r--r--.  1 root   root      5 Sep 30 08:39 httpd.pid
srwx------.  1 apache root      0 Sep 30 08:39 wsgi.2953.0.1.sock

/run/httpd/htcacheclean:
total 0
drwx------. 2 apache apache  40 Jul 23 10:48 .
drwx--x---. 3 root   apache 120 Sep 30 08:39 ..

But after reboot:

# ls -l /run/httpd
ls: cannot access /run/httpd: No such file or directory

And here are the logs when trying to restart Apache:

/var/log/httpd/error_log

[Tue Sep 30 09:30:32.310825 2014] [core:notice] [pid 3370] SELinux policy enabled; httpd running as context system_u:system_r:httpd_t:s0
[Tue Sep 30 09:30:32.312072 2014] [suexec:notice] [pid 3370] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Tue Sep 30 09:30:32.330380 2014] [auth_digest:notice] [pid 3370] AH01757: generating secret for digest authentication ...
[Tue Sep 30 09:30:32.330421 2014] [auth_digest:error] [pid 3370] (2)No such file or directory: AH01762: Failed to create shared memory segment on file /run/httpd/authdigest_shm.3370
[Tue Sep 30 09:30:32.330440 2014] [auth_digest:error] [pid 3370] (2)No such file or directory: AH01760: failed to initialize shm - all nonce-count checking, one-time nonces, and MD5-sess algorithm disabled
[Tue Sep 30 09:30:32.330445 2014] [:emerg] [pid 3370] AH00020: Configuration Failed, exiting
Job for httpd.service failed. See 'systemctl status httpd.service' and 'journalctl -xn' for details.

/var/log/message

Sep 30 08:56:09 brejetuba2 systemd: Starting The Apache HTTP Server...
Sep 30 08:56:09 brejetuba2 systemd: httpd.service: main process exited, code=exited, status=1/FAILURE
Job for httpd.service failed. See 'systemctl status httpd.service' and 'journalctl -xn' for details.
Sep 30 08:56:09 brejetuba2 systemd: Failed to start The Apache HTTP Server.
Sep 30 08:56:09 brejetuba2 systemd: Unit httpd.service entered failed state.

/var/log/audit/audit.log

Job for httpd.service failed. See 'systemctl status httpd.service' and 'journalctl -xn' for details.
type=SERVICE_START msg=audit(1412083740.602:469): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg=' comm="httpd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=failed'

When I create the directory manually, Apache starts:

# mkdir /run/httpd
# systemctl restart httpd
# ls -lRa /run/httpd/
/run/httpd/:
total 8
drwxr-xr-x.  2 root   root  100 Sep 30 09:36 .
drwxr-xr-x. 28 root   root 1020 Sep 30 09:36 ..
-rw-r--r--.  1 root   root    8 Sep 30 09:36 authdigest_shm.3452
-rw-r--r--.  1 root   root    5 Sep 30 09:36 httpd.pid
srwx------.  1 apache root    0 Sep 30 09:36 wsgi.3452.0.1.sock

And after reboot, it's gone again.

Any thoughts on why this is happening?