mod_lua.so missing from 14.04 install (apache2-bin, 2.4.7-1ubuntu4))

Looks like lua wasn't built, because we're trying to build against 5.2, and it's only looking for 5.1.

https://launchpadlibrarian.net/175043407/buildlog_ubuntu-utopic-amd64.apache2_2.4.9-1ubuntu1_UPLOADING.txt.gz

checking lua.h usability... no
checking lua.h presence... no
checking for lua.h... no
checking for lua.h in /usr/local/include/lua5.1... no
checking for lua.h in /usr/local/include/lua51... no
checking for lua.h in /usr/local/include... no
checking for lua.h in /usr/include/lua5.1... no
checking for lua.h in /usr/include/lua51... no
checking for lua.h in /usr/include... no
configure: WARNING: *** Lua 5.1 library not found.
configure: WARNING: Lua 5.1 library is required
checking whether to enable mod_lua... no (disabled)
  adding "-I$(top_srcdir)/modules/lua" to INCLUDES

Looks like the regression was in 2.4.4-6ubuntu3. Prior to this, we had:

checking lua.h usability... no
checking lua.h presence... no
checking for lua.h... no
checking for lua.h in /usr/local/include/lua5.1... no
checking for lua.h in /usr/local/include/lua51... no
checking for lua.h in /usr/local/include... no
checking for lua.h in /usr/include/lua5.1... yes
checking for luaL_newstate in -llua5.1... yes
configure: using '-L/usr/lib -llua5.1 -lm' for Lua Library
  setting MOD_INCLUDES to "-I/usr/include/lua5.1"
  setting MOD_LUA_LDADD to "-L/usr/lib -llua5.1 -lm"
checking whether to enable mod_lua... shared (all)
  adding "-I$(top_srcdir)/modules/lua" to INCLUDES

Bug 1324062 tracks the missing lua 5.2 support issue. In the meantime, I've uploaded a fix by reverting to building against lua 5.1 (as discussed in #ubuntu-devel just now).

This bug was fixed in the package apache2 - 2.4.9-1ubuntu2

---------------
apache2 (2.4.9-1ubuntu2) utopic; urgency=medium

  * Revert 2.4.4-6ubuntu3 and build against lua 5.1 again, since Apache doesn't
    yet support building against lua 5.2 (LP: #1323930).
 -- Robie Basak <email address hidden> Wed, 28 May 2014 08:55:25 +0000

Hi maintainers,

I'm victim of this bug, and need mod_lua. I can compile it myself, but as user of 14.04 LTS, I thought I can expect this bug to be fixed, e.g. being able to get the missing dependencies installed.

I'm not sure to really understand the release process here. Janitor says it's fixed, but apt-get update+upgrade does not install the missing mod_lua.so.

Is there something I have to do to get this fix applied to my server ?

TIA,
Charles

Charles,

I fixed this by getting the updated version of Apache can be downloaded from the following url:

https://launchpad.net/ubuntu/+source/apache2

You need the following packages:

apache2-bin_2.4.9-1ubuntu2_amd64.deb
apache2-data_2.4.9-1ubuntu2_all.deb
apache2-utils_2.4.9-1ubuntu2_amd64.deb
apache2_2.4.9-1ubuntu2_amd64.deb
apache2-mpm-worker_2.4.9-1ubuntu2_amd64.deb

(or apache2-mpm-prefork_2.4.9-1ubuntu2_amd64.deb)

and install in that order with sudo dpkg -i, first install liblua5.1

It's not in 14.04.1 - so I also would like to know if this fix perhaps will be in 14.04.2.

Best,

Dirk

Thanks Dirk for your help.

As I found no usable crypto lib in LUA available as Ubuntu LTA package, I reverted to mod_perl for my FixUp handler.
Sad thing, LUA would be a nice addition to my weapon-list to hack on Apache traffic, but it seems not very much used for such things.

Regs,
Charles

Hi Charles,

Is there nothing here: http://lua-users.org/wiki/CryptographyStuff?

Lua in Apache is fairly new, but it can do some cool stuff :)

Best,

Dirk

The problem still exists. I've opened bug 1432989 for that.

I added a trusty task to this bug, since it's still not fixed there. I'll mark 1432989 as a duplicate.

Status changed to 'Confirmed' because the bug affects multiple users.

This is easy to fix in trusty, my only question is regarding the change we would be introducing and the SRU policy.

Apache in trusty was released with essentially no lua support, and this change would add that back in (as was the original intention). As a consequence, the apache2-bin package would grow a dependency on liblua5.1.

The other point is that apache2 in trusty-backports has such support, so there is a way for people to get it if they really need it, and they will also get a newer apache (2.4.10 currently). But without official support, i.e., no promise of security updates.

And, one more point, it could be that this would also introduce security issues which didn't affect trusty before, but now could, given the presence of the new lua module in apache.

Trusty is almost end-of-life, we don't think it's worth fixing it there. People should have moved on to another LTS by now, given there are two available: xenial and bionic.

Sorry this bug remained open and not handled for so long.