[Pacemaker] Odd issues with apache on RHEL 7 beta

Digimer lists at alteeve.ca
Fri Dec 27 06:34:02 UTC 2013


Hi all,

   I'm walking through the pcs cluster from scratch on RHEL 7 beta. I've 
run into a couple issues and I can't tell if they're issues or just 
oversites on my part.

1. If httpd is running, pacemaker thinks it is not and can not start it. 
It shows:

====
Dec 27 01:11:38 an-c03n02 apache(Website)[11412]: INFO: apache not running
Dec 27 01:11:38 an-c03n02 apache(Website)[11412]: INFO: waiting for 
apache /etc/httpd/conf/httpd.conf to come up
====

Until it fails over to the other node, which then shows the same thing 
until it fails back. If I systemctl stop httpd.service and then let 
pacemaker start it, it works mostly.

2. If pacemaker starts httpd, it prints errors in syslog:

====
Dec 27 01:26:08 an-c03n01 systemd: pacemaker.service: Got notification 
message from PID 13193, but reception only permitted for PID 1965
Dec 27 01:26:18 an-c03n01 systemd: pacemaker.service: Got notification 
message from PID 13193, but reception only permitted for PID 1965
====
[root at an-c03n01 ~]# cat /proc/13193/status |grep Name
Name:	httpd
[root at an-c03n01 ~]# cat /proc/1965/status |grep Name
Name:	pacemakerd
====

Apache does start though:

====
lynx http://127.0.0.1/server-status
====
                               Apache Server Status for 127.0.0.1 (via 
127.0.0.1)

    Server Version: Apache/2.4.6 (Red Hat)
    Server MPM: prefork
    Server Built: Nov 1 2013 02:51:26
 
________________________________________________________________________________________________

    Current Time: Friday, 27-Dec-2013 01:30:10 EST
    Restart Time: Friday, 27-Dec-2013 01:25:59 EST
    Parent Server Config. Generation: 1
    Parent Server MPM Generation: 0
    Server uptime: 4 minutes 10 seconds
    Server load: 0.00 0.03 0.05
    Total accesses: 10 - Total Traffic: 37 kB
    CPU Usage: u0 s0 cu0 cs0
    .04 requests/sec - 151 B/second - 3788 B/request
    1 requests currently being processed, 4 idle workers

W____...........................................................
................................................................
................................................................
................................................................

    Scoreboard Key:
    "_" Waiting for Connection, "S" Starting up, "R" Reading Request,
    "W" Sending Reply, "K" Keepalive (read), "D" DNS Lookup,
    "C" Closing connection, "L" Logging, "G" Gracefully finishing,
    "I" Idle cleanup of worker, "." Open slot with no current process

    Srv PID Acc M CPU SS Req Conn Child Slot Client VHost Request
    0-0 13196 0/2/2 W 0.00 0 0 0.0 0.01 0.01 127.0.0.1 
an-c03n01.alteeve.ca:80 GET /server-status
====

3. I know I mentioned this on IRC before, but I thought I should mention 
it here again. In the pcs CfS, it shows to set:

====
<Location /server-status>
    SetHandler server-status
    Order deny,allow
    Deny from all
    Allow from 127.0.0.1
</Location>
====

But then in the resource setup, it says:

====
pcs resource create WebSite ocf:heartbeat:apache  \
       configfile=/etc/httpd/conf/httpd.conf \
       statusurl="http://localhost/server-status" op monitor interval=1min
====

This fails because apache will not respond to 'localhost', so you need 
to set 'statusurl="http://127.0.0.1/server-status" (or change the apache 
directive to 'Allow from localhost').

So did I screw something up (specially re: #2), or is this a genuine issue?

Thanks!

-- 
Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without 
access to education?




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