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Apache log format issue with EasyApache 4 (apache 2.4), Varnish and mod_remoteip

Discussion in 'EasyApache' started by Mads Nordholm, Jul 4, 2016.

  1. Mads Nordholm

    Mads Nordholm Active Member

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    I have Varnish (manually installed and configured) running in front of Apache – works like a charm. The only issue I'm having now is that the X-Forwarded-For header set by Varnish (yes, it's working) is not being correctly picked up by Apache, so the IP of my server shows up in all log files.

    I have tried following the steps outlined in this thread to modify the log format used for vhosts, but to no avail: mod_remoteip and correct ip in vhost access logs

    I would love to hear from anybody who has a similar setup, and who managed to get this very important part right.

    EDIT: I should probably clarify that I am running Cloudlinux 7 with cPanel 11.56.0 (build 24)
     
    #1 Mads Nordholm, Jul 4, 2016
    Last edited: Jul 4, 2016
  2. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

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    Hello,

    You may want to try the last post in that thread instead, as it's reported as working from that user.

    Thank you.
     
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    #2 cPanelMichael, Jul 11, 2016
  3. Mads Nordholm

    Mads Nordholm Active Member

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    I tried following the instructions pointed to in the linked thread, but they did NOT work for me. The problem seems to be that the LogFormat directives in /usr/local/apache/conf/httpd.conf are not in any way affected by running:

    Code:
    sed -i.original -e 's/\(logformat.*\)%h\(.*\)/\1%a\2/' /var/cpanel/conf/apache/main
sed -i.original -e 's/\(.*\)%h \(.* combinedvhost.*\)/\1%a \2/' /usr/local/cpanel/Cpanel/AdvConfig/apache.pm
/scripts/rebuildhttpdconf
/scripts/restartsrv_httpd
    In fact, after running the commands above, the output of grep LogFormat /usr/local/apache/conf/httpd.conf looks like this:

    Code:
    LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent
LogFormat "%a %l %u %t \"%r\" %>s %b" common
LogFormat "%a %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
    Despite the sed commands clearly doing what they are supposed to do. In other words, it looks like running /scripts/rebuildhttpdconf does not parse /var/cpanel/conf/apache/main and/or /usr/local/cpanel/Cpanel/AdvConfig/apache.pm.

    The only way I can currently get this to work is by replacing %h with %a directly in /usr/local/apache/conf/httpd.conf, but I have no idea if these modifications will persist after a cPanel update or not. Time will tell I guess.
     
    #3 Mads Nordholm, Jul 11, 2016
  4. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

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    Hello,

    Run the Apache distiller after running those "sed" commands, but before running "/scripts/rebuildhttpdconf":

    Code:
    /usr/local/cpanel/bin/apache_conf_distiller --update
    Here's the result when I used this method:

    Code:
    # grep LogFormat /usr/local/apache/conf/httpd.conf
    LogFormat "%{Referer}i -> %U" referer
    LogFormat "%{User-agent}i" agent
    LogFormat "%h %l %u %t \"%r\" %>s %b" common
    LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined
    Let us know if this helps.

    Thank you.
     
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    #4 cPanelMichael, Jul 14, 2016
  5. Mads Nordholm

    Mads Nordholm Active Member

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    It would appear that your approach works, but it does leave me wondering why there isn't a more straight forward way of overriding Apache configuration directives without having to jump through so many hoops to ensure that changes are not overwritten by cPanel update.
     
    #5 Mads Nordholm, Jul 16, 2016
  6. Miguel G

    Miguel G Well-Known Member

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    After updating WHM 56 to 58 and migrating to EasyApache 4, this is not working for me anymore (I had EasyApache 3) and this has been working for almost 2 years.

    I have Varnish running in front of Apache.

    I have enabled mod_remoteip and made sure the module is loaded. I have added the following in /etc/apache2/conf.modules.d/360_mod_remoteip.conf
    Code:
    # Enable mod_remoteip
LoadModule remoteip_module modules/mod_remoteip.so
<IfModule remoteip_module>
  # These settings are specific to your environment, so
  # we'll leave them commented out until you manually set
  # them. I recommend carefully reading the documentation
  # as misconfiguration of this module can result in
  # potential data compromise.
  #
  # mod_remoteip - Apache HTTP Server Version 2.5
  # ---------------------------------------------------------

RemoteIPHeader X-Forwarded-For
RemoteIPInternalProxy myipaddress
</IfModule>
    I have even tried modifying manually the httpd.conf with %a instead of %h and still is not working.
     
    #6 Miguel G, Aug 12, 2016
    Last edited by a moderator: Aug 12, 2016
  7. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

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    It's possible this relates to the use of the third-party Varnish plugin, however feel free to open a support ticket using the link in my signature so we can take a closer look. You can post the ticket number here so we can update this thread with the outcome.

    Thank you.
     
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    #7 cPanelMichael, Aug 22, 2016
  8. Miguel G

    Miguel G Well-Known Member

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    Finally it worked following the instructions from this thread:

    Apache log format issue with EasyApache 4

    cp -a /var/cpanel/templates/apache2_4/ea4_main.default /var/cpanel/templates/apache2_4/ea4_main.local
    vi /var/cpanel/templates/apache2_4/ea4_main.local

    and change %h entries for %a
     
    #8 Miguel G, Oct 24, 2016
  9. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

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    I'm happy to see the issue is now resolved. Thank you for updating this thread with the outcome.
     
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    #9 cPanelMichael, Oct 25, 2016
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