Syntax error ap_log_rerror adding mod_cloudflare

[kernow]

Hi,
Trying to install the mod_cloudflare module but although it appears to install OK we get a syntax error when restarting Apache.
Server is Centos 5 64 bit Apache 2.4.6 and building fron source file has same problem.
Note, this works fine on a Centos 5 32 bit Apache 2.4.6

httpd: Syntax error on line 36 of /usr/local/apache/conf/httpd.conf: Cannot load /usr/lib64/httpd/modules/mod_cloudflare.so into server: /usr/lib64/httpd/modules/mod_cloudflare.so: undefined symbol: ap_log_rerror

Full build info:

apxs -a -i -c mod_cloudflare.c
/usr/lib64/apr-1/build/libtool --silent --mode=compile gcc -prefer-pic -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fno-strict-aliasing  -DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -pthread -I/usr/include/httpd  -I/usr/include/apr-1   -I/usr/include/apr-1   -c -o mod_cloudflare.lo mod_cloudflare.c && touch mod_cloudflare.slo
/usr/lib64/apr-1/build/libtool --silent --mode=link gcc -o mod_cloudflare.la  -rpath /usr/lib64/httpd/modules -module -avoid-version    mod_cloudflare.lo
/usr/lib64/httpd/build/instdso.sh SH_LIBTOOL='/usr/lib64/apr-1/build/libtool' mod_cloudflare.la /usr/lib64/httpd/modules
/usr/lib64/apr-1/build/libtool --mode=install cp mod_cloudflare.la /usr/lib64/httpd/modules/
cp .libs/mod_cloudflare.so /usr/lib64/httpd/modules/mod_cloudflare.so
cp .libs/mod_cloudflare.lai /usr/lib64/httpd/modules/mod_cloudflare.la
cp .libs/mod_cloudflare.a /usr/lib64/httpd/modules/mod_cloudflare.a
chmod 644 /usr/lib64/httpd/modules/mod_cloudflare.a
ranlib /usr/lib64/httpd/modules/mod_cloudflare.a
PATH="$PATH:/sbin" ldconfig -n /usr/lib64/httpd/modules
----------------------------------------------------------------------
Libraries have been installed in:
   /usr/lib64/httpd/modules

If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR'
flag during linking and do at least one of the following:
   - add LIBDIR to the `LD_LIBRARY_PATH' environment variable
     during execution
   - add LIBDIR to the `LD_RUN_PATH' environment variable
     during linking
   - use the `-Wl,--rpath -Wl,LIBDIR' linker flag
   - have your system administrator add LIBDIR to `/etc/ld.so.conf'

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
----------------------------------------------------------------------
chmod 755 /usr/lib64/httpd/modules/mod_cloudflare.so
[activating module `cloudflare' in /etc/httpd/conf/httpd.conf]

 

[cPanelMichael]

Hello

Could you let us know the full steps you took to install this module?

Thank you.

 

[kernow]

Hello

Could you let us know the full steps you took to install this module?

Thank you.

This is the attempt using the supplied file:

/usr/local/src]# wget https://www.cloudflare.com/static/misc/mod_cloudflare/mod_cloudflare.latest.tar.gz
[/usr/local/src]# tar xvzf mod_cloudflare.latest.tar.gz
mod_cloudflare-1.2.0/
mod_cloudflare-1.2.0/mod_cloudflare.c
mod_cloudflare-1.2.0/configure.ac
mod_cloudflare-1.2.0/ChangeLog
mod_cloudflare-1.2.0/Makefile.in
mod_cloudflare-1.2.0/LICENSE
mod_cloudflare-1.2.0/README

apxs -a -i -c mod_cloudflare-1.2.0/mod_cloudflare.c
/usr/lib64/apr-1/build/libtool --silent --mode=compile gcc -prefer-pic -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fno-strict-aliasing  -DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -pthread -I/usr/include/httpd  -I/usr/include/apr-1   -I/usr/include/apr-1   -c -o mod_cloudflare-1.2.0/mod_cloudflare.lo mod_cloudflare-1.2.0/mod_cloudflare.c && touch mod_cloudflare-1.2.0/mod_cloudflare.slo
/usr/lib64/apr-1/build/libtool --silent --mode=link gcc -o mod_cloudflare-1.2.0/mod_cloudflare.la  -rpath /usr/lib64/httpd/modules -module -avoid-version    mod_cloudflare-1.2.0/mod_cloudflare.lo
/usr/lib64/httpd/build/instdso.sh SH_LIBTOOL='/usr/lib64/apr-1/build/libtool' mod_cloudflare-1.2.0/mod_cloudflare.la /usr/lib64/httpd/modules
/usr/lib64/apr-1/build/libtool --mode=install cp mod_cloudflare-1.2.0/mod_cloudflare.la /usr/lib64/httpd/modules/
cp mod_cloudflare-1.2.0/.libs/mod_cloudflare.so /usr/lib64/httpd/modules/mod_cloudflare.so
cp mod_cloudflare-1.2.0/.libs/mod_cloudflare.lai /usr/lib64/httpd/modules/mod_cloudflare.la
cp mod_cloudflare-1.2.0/.libs/mod_cloudflare.a /usr/lib64/httpd/modules/mod_cloudflare.a
chmod 644 /usr/lib64/httpd/modules/mod_cloudflare.a
ranlib /usr/lib64/httpd/modules/mod_cloudflare.a
PATH="$PATH:/sbin" ldconfig -n /usr/lib64/httpd/modules
----------------------------------------------------------------------
Libraries have been installed in:
   /usr/lib64/httpd/modules

If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR'
flag during linking and do at least one of the following:
   - add LIBDIR to the `LD_LIBRARY_PATH' environment variable
     during execution
   - add LIBDIR to the `LD_RUN_PATH' environment variable
     during linking
   - use the `-Wl,--rpath -Wl,LIBDIR' linker flag
   - have your system administrator add LIBDIR to `/etc/ld.so.conf'

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
----------------------------------------------------------------------
chmod 755 /usr/lib64/httpd/modules/mod_cloudflare.so
[activating module `cloudflare' in /etc/httpd/conf/httpd.conf]

/usr/local/src]# httpd -t -D DUMP_MODULES
httpd: Syntax error on line 36 of /usr/local/apache/conf/httpd.conf: Cannot load /usr/lib64/httpd/modules/mod_cloudflare.so into server: /usr/lib64/httpd/modules/mod_cloudflare.so: undefined symbol: ap_log_rerror

Next attempt build from source:

$ curl -k -L https://github.com/cloudflare/mod_cloudflare/tarball/master > mod_cloudflare.tar.gz
$ tar -zxvf mod_cloudflare.tar.gz
$ cd cloudflare-mod_cloudflare-2333a3b/
$ autoconf
$ ./configure
$ make
$ make install

But the syntax error is the same as above.

 

[cPanelMichael]

I recommend consulting with CloudFlare directly to see how they recommend proceeding with the installation. You may want to incorporate it as a custom opt module with EasyApache. Documentation on this is at:

EasyApache - Custom Opt Module

Thank you.

 

[kernow]

In their tests on centos 6 the mod installs without error. As I mentioned in my first post the mod also installed OK on a centos 5 32 bit box, its just the centos 5 64 bit that has the problem and remember the mod gets created its just the syntax error easyapache throws up.

 

[cPanelMichael]

In their tests on centos 6 the mod installs without error. As I mentioned in my first post the mod also installed OK on a centos 5 32 bit box, its just the centos 5 64 bit that has the problem and remember the mod gets created its just the syntax error easyapache throws up.

The error message appears isolated to Mod_Cloudflare installation itself. Have you reported this issue to them so they can correct the installation instructions for this module with cPanel on the environment you have reproduced the issue on?

Thank you.

 

[kernow]

It appears the problem is a conflict with mod_cloudflare amd mod _rpaf which Varnish uses and or mod_remoteip , you can't install both!