Multicast doesn't work after update from 1.2 to 1.4.4

[krokodeilakias]

I recently updated from 1.2 to 1.4.4 (SVN 6077) having used “-P -T -F -o” options in my CentOS 7.4 box. During my post update tests, I realized that unlike unicast, multicast is not working any more. Actions taken so far:

• Successfully tested multicast with 1 and 2 clients according to https://wiki.fogproject.org/wiki/index.php?title=Multicast#Troubleshooting
• Removed /opt/fog/service and rerun the installer. No luck.

[root@ianos ~]# systemctl status -l FOGMulticastManager
● FOGMulticastManager.service - FOGMulticastManager
   Loaded: loaded (/usr/lib/systemd/system/FOGMulticastManager.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2018-02-05 00:22:37 EET; 2min 28s ago
 Main PID: 1669 (FOGMulticastMan)
   CGroup: /system.slice/FOGMulticastManager.service
           └─1669 /usr/bin/php -q /opt/fog/service/FOGMulticastManager/FOGMulticastManager &

Feb 05 00:22:37 ianos.my.domain systemd[1]: Started FOGMulticastManager.
Feb 05 00:22:37 ianos.my.domain systemd[1]: Starting FOGMulticastManager...
Feb 05 00:22:40 ianos.my.domain FOGMulticastManager[1669]: PHP Strict Standards:  Non-static method MulticastManager::outall() should not be called statically in /opt/fog/service/FOGMulticastManager/FOGMulticastManager on line 30
Feb 05 00:22:40 ianos.my.domain FOGMulticastManager[1669]: PHP Fatal error:  Using $this when not in object context in /var/www/html/fog/lib/fog/multicastmanager.class.php on line 9

• truncated multicastSessions and multicastSessionsAssoc from DB
• udp-receiver is not running (how should it?)
• /opt/fog/log/multicast.log reports nothing

So, is there anything else to try?

[Tom Elliott]

Feb 05 00:22:40 ianos.my.domain FOGMulticastManager[1669]: PHP Fatal error:  Using $this when not in object context in /var/www/html/fog/lib/fog/multicastmanager.class.php on line 9

This is the line that’s causing issues.

First, I’m going to guess, and you can confirm, that you have two instances of FOG currently running. MulticastManager moved to /service/ folder for 1.4.4, so I’m guessing there’s a conflict.

To confirm, please provide output of:

ls -lhat /var/www
AND
ls -lhat /var/www/html

I suspect both “fog” instances will show up as individual folders, rather than one being a link to the other.

To fix quickly:
rm -rf /var/www/fog /var/www/html/fog

Rerun the installer.

[Wayne Workman]

@krokodeilakias Manually start the multicast manager. Something like this: systemctl start FOGMulticastManager Then look in the logs and see if there is anything. If there’s nothing in the logs, check the apache error logs.

[krokodeilakias]

@wayne-workman Had already tried this:

[root@ianos ~]# tail /etc/httpd/logs/access_log
FOGServerIP - - [05/Feb/2018:01:23:21 +0200] "GET /fog/status/bandwidth.php?dev=eth0 HTTP/1.1" 200 46 "-" "-"
FOGServerIP - - [05/Feb/2018:01:23:21 +0200] "POST /fog/status/logtoview.php HTTP/1.1" 200 663 "-" "-"
FOGServerIP - - [05/Feb/2018:01:23:22 +0200] "GET /fog/status/bandwidth.php?dev=eth0 HTTP/1.1" 200 46 "-" "-"
client-1_IP - - [05/Feb/2018:01:23:22 +0200] "POST /fog/service/progress.php HTTP/1.1" 200 - "-" "curl/7.53.0"
client-2_IP - - [05/Feb/2018:01:23:22 +0200] "POST /fog/service/progress.php HTTP/1.1" 200 - "-" "curl/7.53.0"
FOGServerIP - - [05/Feb/2018:01:23:24 +0200] "GET /fog/status/bandwidth.php?dev=eth0 HTTP/1.1" 200 46 "-" "-"
[...]

In /opt/fog/log/multicast.log nothing appears.

[Tom Elliott]

Feb 05 00:22:40 ianos.my.domain FOGMulticastManager[1669]: PHP Fatal error:  Using $this when not in object context in /var/www/html/fog/lib/fog/multicastmanager.class.php on line 9

This is the line that’s causing issues.

First, I’m going to guess, and you can confirm, that you have two instances of FOG currently running. MulticastManager moved to /service/ folder for 1.4.4, so I’m guessing there’s a conflict.

To confirm, please provide output of:

ls -lhat /var/www
AND
ls -lhat /var/www/html

I suspect both “fog” instances will show up as individual folders, rather than one being a link to the other.

To fix quickly:
rm -rf /var/www/fog /var/www/html/fog

Rerun the installer.

[krokodeilakias]

@tom-elliott

[root@ianos ~]# ls -lhat /var/www
total 4.0K
drwxr-xr-x   4 root root   47 Feb  4 21:54 html
drwxr-xr-x   4 root root   41 Feb  3 23:26 .
lrwxrwxrwx   1 root root   18 Feb  3 23:26 fog -> /var/www/html/fog/
drwxr-xr-x   2 root root    6 Oct 19 23:39 cgi-bin
drwxr-xr-x. 22 root root 4.0K Aug 21 21:29 ..
[root@ianos ~]# ls -lhat /var/www/html
total 12K
drwxr-xr-x 13 apache apache 4.0K Feb  4 22:31 fog
drwxr-xr-x  4 root   root     47 Feb  4 21:54 .
drwxr-xr-x  4 root   root     41 Feb  3 23:26 ..
-rw-r--r--  1 root   root     45 Jan 29  2015 index.php

Although the above don’t seem erroneous to me, I followed your advice and deleted
/var/www/fog and /var/www/html/fog. After re-running the installer multicasting works as it should. Apparently it was a right guess
Thanks a lot for your nice work!