Nagios Support Forum

I am moving from CentOS release 6.5 (Final) 64bit to:
[root@nagios01 nagiosxi]# cat /etc/*elease
CentOS Linux release 7.6.1810 (Core)
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

CentOS Linux release 7.6.1810 (Core)
CentOS Linux release 7.6.1810 (Core)

I get the following errors:


Sep 05 16:48:04 nagios01.corp.globetax.com systemd[1]: Starting The Apache HTTP Server...
Sep 05 16:48:04 nagios01.corp.globetax.com httpd[4742]: [Thu Sep 05 16:48:04.551717 2019] [so:warn] [pid 4742] AH01574: module ssl_module is already loaded, skipping
Sep 05 16:48:04 nagios01.corp.globetax.com httpd[4742]: AH00526: Syntax error on line 42 of /etc/httpd/conf.d/ssl.conf:
Sep 05 16:48:04 nagios01.corp.globetax.com httpd[4742]: Invalid command 'SSLMutex', perhaps misspelled or defined by a module not included in the server configuration
Sep 05 16:48:04 nagios01.corp.globetax.com systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
Sep 05 16:48:04 nagios01.corp.globetax.com kill[4744]: kill: cannot find process ""
Sep 05 16:48:04 nagios01.corp.globetax.com systemd[1]: httpd.service: control process exited, code=exited status=1
Sep 05 16:48:04 nagios01.corp.globetax.com systemd[1]: Failed to start The Apache HTTP Server.
Sep 05 16:48:04 nagios01.corp.globetax.com systemd[1]: Unit httpd.service entered failed state.
Sep 05 16:48:04 nagios01.corp.globetax.com systemd[1]: httpd.service failed.

Can you post the output to the following commands,

[root@nagios01 ~]# systemctl status httpd
● httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Thu 2019-09-05 16:48:04 EDT; 19h ago
Docs: man:httpd(8)
man:apachectl(8)
Process: 4744 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=1/FAILURE)
Process: 4742 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE)
Main PID: 4742 (code=exited, status=1/FAILURE)

Sep 05 16:48:04 nagios01.corp.globetax.com systemd[1]: Starting The Apache HTTP Server...
Sep 05 16:48:04 nagios01.corp.globetax.com httpd[4742]: [Thu Sep 05 16:48:04.551717 2019] [so:warn] [pid 4742] AH01574: module ssl_module is already loaded, skipping
Sep 05 16:48:04 nagios01.corp.globetax.com httpd[4742]: AH00526: Syntax error on line 42 of /etc/httpd/conf.d/ssl.conf:
Sep 05 16:48:04 nagios01.corp.globetax.com httpd[4742]: Invalid command 'SSLMutex', perhaps misspelled or defined by a module not included in the server configuration
Sep 05 16:48:04 nagios01.corp.globetax.com systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
Sep 05 16:48:04 nagios01.corp.globetax.com kill[4744]: kill: cannot find process ""
Sep 05 16:48:04 nagios01.corp.globetax.com systemd[1]: httpd.service: control process exited, code=exited status=1
Sep 05 16:48:04 nagios01.corp.globetax.com systemd[1]: Failed to start The Apache HTTP Server.
Sep 05 16:48:04 nagios01.corp.globetax.com systemd[1]: Unit httpd.service entered failed state.
Sep 05 16:48:04 nagios01.corp.globetax.com systemd[1]: httpd.service failed.
[root@nagios01 ~]# systemctl start httpd
Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details.
[root@nagios01 ~]# journalctl -xe
-- Support: http://lists.freedesktop.org/mailman/li ... temd-devel
--
-- Unit user-0.slice has finished starting up.
--
-- The start-up result is done.
Sep 06 11:50:28 nagios01.corp.globetax.com systemd-logind[5230]: New session 16336 of user root.
-- Subject: A new session 16336 has been created for user root
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/li ... temd-devel
-- Documentation: http://www.freedesktop.org/wiki/Softwar ... /multiseat
--
-- A new session with the ID 16336 has been created for the user root.
--
-- The leading process of the session is 6909.
Sep 06 11:50:28 nagios01.corp.globetax.com systemd[1]: Started Session 16336 of user root.
-- Subject: Unit session-16336.scope has finished start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/li ... temd-devel
--
-- Unit session-16336.scope has finished starting up.
--
-- The start-up result is done.
Sep 06 11:50:29 nagios01.corp.globetax.com sshd[6909]: pam_unix(sshd:session): session opened for user root by (uid=0)
Sep 06 11:50:29 nagios01.corp.globetax.com postfix/pickup[1109]: 0600E40980F5: uid=1001 from=<[email protected]>
Sep 06 11:50:29 nagios01.corp.globetax.com postfix/cleanup[6437]: 0600E40980F5: message-id=<[email protected]>
Sep 06 11:50:29 nagios01.corp.globetax.com postfix/qmgr[6451]: 0600E40980F5: from=<[email protected]>, size=1825, nrcpt=1 (queue active)
Sep 06 11:50:29 nagios01.corp.globetax.com dbus[5244]: [system] Activating service name='org.freedesktop.problems' (using servicehelper)
Sep 06 11:50:29 nagios01.corp.globetax.com dbus[5244]: [system] Successfully activated service 'org.freedesktop.problems'
Sep 06 11:50:29 nagios01.corp.globetax.com postfix/pickup[1109]: 23EE240980F6: uid=1001 from=<[email protected]>
Sep 06 11:50:29 nagios01.corp.globetax.com postfix/cleanup[6437]: 23EE240980F6: message-id=<[email protected]>
Sep 06 11:50:29 nagios01.corp.globetax.com postfix/qmgr[6451]: 23EE240980F6: from=<[email protected]>, size=1826, nrcpt=1 (queue active)
Sep 06 11:50:29 nagios01.corp.globetax.com postfix/smtp[8776]: 23EE240980F6: to=<[email protected]>, relay=mailhost3.globetax.com[64.132.182.235]:25, delay=0.15, delays=0.01/0/0.07/0.07, dsn=2.0.0, status=sent (250 2.0.0 Ok: que
Sep 06 11:50:29 nagios01.corp.globetax.com postfix/qmgr[6451]: 23EE240980F6: removed
Sep 06 11:50:29 nagios01.corp.globetax.com ndo2db[26587]: Trimming timedevents.
Sep 06 11:50:29 nagios01.corp.globetax.com ndo2db[26587]: Trimming systemcommands.
Sep 06 11:50:29 nagios01.corp.globetax.com ndo2db[26587]: Trimming servicechecks.
Sep 06 11:50:29 nagios01.corp.globetax.com ndo2db[26587]: Trimming hostchecks.
Sep 06 11:50:29 nagios01.corp.globetax.com ndo2db[26587]: Trimming eventhandlers.
Sep 06 11:50:30 nagios01.corp.globetax.com polkitd[5236]: Registered Authentication Agent for unix-process:7270:8486453 (system bus name :1.45446 [/usr/bin/pkttyagent --notify-fd 5 --fallback], object path /org/freedesktop/PolicyKit1/Aut
Sep 06 11:50:30 nagios01.corp.globetax.com systemd[1]: Starting The Apache HTTP Server...
-- Subject: Unit httpd.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/li ... temd-devel
--
-- Unit httpd.service has begun starting up.
Sep 06 11:50:30 nagios01.corp.globetax.com httpd[7276]: [Fri Sep 06 11:50:30.083702 2019] [so:warn] [pid 7276] AH01574: module ssl_module is already loaded, skipping
Sep 06 11:50:30 nagios01.corp.globetax.com httpd[7276]: AH00526: Syntax error on line 42 of /etc/httpd/conf.d/ssl.conf:
Sep 06 11:50:30 nagios01.corp.globetax.com httpd[7276]: Invalid command 'SSLMutex', perhaps misspelled or defined by a module not included in the server configuration
Sep 06 11:50:30 nagios01.corp.globetax.com systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
Sep 06 11:50:30 nagios01.corp.globetax.com kill[7279]: kill: cannot find process ""
Sep 06 11:50:30 nagios01.corp.globetax.com systemd[1]: httpd.service: control process exited, code=exited status=1
Sep 06 11:50:30 nagios01.corp.globetax.com systemd[1]: Failed to start The Apache HTTP Server.
-- Subject: Unit httpd.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/li ... temd-devel
--
-- Unit httpd.service has failed.
--
-- The result is failed.
Sep 06 11:50:30 nagios01.corp.globetax.com systemd[1]: Unit httpd.service entered failed state.
Sep 06 11:50:30 nagios01.corp.globetax.com systemd[1]: httpd.service failed.
Sep 06 11:50:30 nagios01.corp.globetax.com polkitd[5236]: Unregistered Authentication Agent for unix-process:7270:8486453 (system bus name :1.45446, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (discon

Ah, I missed it in the first post.

Sep 05 16:48:04 nagios01.corp.globetax.com httpd[4742]: [Thu Sep 05 16:48:04.551717 2019] [so:warn] [pid 4742] AH01574: module ssl_module is already loaded, skipping
Sep 05 16:48:04 nagios01.corp.globetax.com httpd[4742]: AH00526: Syntax error on line 42 of /etc/httpd/conf.d/ssl.conf:
Sep 05 16:48:04 nagios01.corp.globetax.com httpd[4742]: Invalid command 'SSLMutex', perhaps misspelled or defined by a module not included in the server configuration

Can you PM me your /etc/httpd/conf.d/ssl.conf file?
Also, if you could post the output of That would be great.

apachectl -M
[Fri Sep 06 12:02:37.590185 2019] [so:warn] [pid 31368] AH01574: module ssl_module is already loaded, skipping
AH00526: Syntax error on line 42 of /etc/httpd/conf.d/ssl.conf:
Invalid command 'SSLMutex', perhaps misspelled or defined by a module not included in the server configuration

Alright, so let's take a look at /etc/httpd/conf.d/ssl.conf. Specifically line 42.

changed SSLMutex default to Mutex default and now the daemon runs but the login page looks mangled and access is forbidden. Seems like a deprecated change when upgrading from 2.2 to 2.4

Ah, good catch! Is everything proceeding normally now?

No, I am not sure what the fix is. I may just rebuild the server.

Okay, we will leave this thread open in case something happens with the new install. If you get to another mangled login page, definitely grab a screenshot of it, and send that over to us along with the Apache error log, and we'll see what can make of it.