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NeddySeagoon
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PostPosted: Sun Sep 23, 2012 9:23 pm    Post subject: Apache on Raspberry Pi Reply with quote

Team,

I'm trying yo get Apache2 to run on Raspberry Pi. As I write, its building without ssl as I found some posts suggesting that this could be a problem.

[ebuild R ] www-servers/apache-2.2.22-r1 USE="suexec threads -debug -doc -ldap (-selinux) -ssl* -static" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias -asis -auth_digest -authn_dbd -cern_meta -charset_lite -dbd -dumpio -ident -imagemap -log_forensic -proxy -proxy_ajp -proxy_balancer -proxy_connect -proxy_ftp -proxy_http -proxy_scgi -reqtimeout -substitute -version" APACHE2_MPMS="-event -itk -peruser -prefork -worker" 0 kB

The only pages that are actually served are autoindex pages. Have a look at http://62.3.120.142/~roy to see for yourself.
Even the
Apache wrote:
It Works!
page fails.

The log is full of
Code:
[Sun Sep 23 21:45:35 2012] [notice] child pid 10057 exit signal Segmentation fault (11)
which looks like a very bad thing.

The filesystems are mostly mounted over nfs
Code:
Pi_Net # df
Filesystem                 1K-blocks     Used Available Use% Mounted on
rootfs                      17740116 10574360   6264588  63% /
192.168.10.30:/var/armv6j/  17740116 10574360   6264588  63% /
tmpfs                         110308      224    110084   1% /run
cgroup_root                    10240        0     10240   0% /sys/fs/cgroup
udev                           10240        0     10240   0% /dev
shm                           110308        0    110308   0% /dev/shm
/dev/mmcblk0p3              29515348  8950984  19065052  32% /home
192.168.10.30:/usr/portage  17740160 10574336   6264704  63% /usr/portage

/home is on a 32G SDHC Class 4 card
lockfiles are in /run, not /var/run, since /var is not on a local drive.

Its a ~arm install, built with a mix of crossdev on an AMD64, cross distcc and native compiles.

Google suggets building for gdb ... which makes my eyes glaze over. Before I go that route, is there anything obvious I'm missing?

Edit - removing ssl didn't change anything
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chithanh
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PostPosted: Mon Sep 24, 2012 3:26 am    Post subject: Reply with quote

Are you using the kernel bcmrpi_cutdown_defconfig? It enables CONFIG_EXPERT, which makes some things optional that apache requires for proper functioning.
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NeddySeagoon
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PostPosted: Mon Sep 24, 2012 7:06 am    Post subject: Reply with quote

chithanh,

That may well be it. I've been putting off building my own kernel, I'm still using 3.1.9+ #110.
Kernel build time tonight. I'll post back with an update.
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NeddySeagoon
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PostPosted: Mon Sep 24, 2012 10:42 pm    Post subject: Reply with quote

chithanh,

I cloned 3.2.27 from git.

It detects everything but never mounts root. It waits for a very long time even with rootwait removed from cmdline.txt
Theres no panic ... I must be doing something daft.

root is on a usb disk - its detected and the partitions are shown.
As its USB, I use ext2. The kernel has ext4 and used ext4 for ext2/3 built in.
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chithanh
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PostPosted: Fri Sep 28, 2012 12:01 am    Post subject: Reply with quote

The 3.2.27's bcmrpi_cutdown_defconfig should directly give you a booting config. Are you running up-to-date firmware?
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NeddySeagoon
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PostPosted: Fri Sep 28, 2012 8:03 pm    Post subject: Reply with quote

chithanh,

I have updated the firmware, made a booting 3.2.17 kernel from bcmrpi_cutdown_defconfig, used that as the basis of my own kernel with all of the Expert Menu options on and I still get segfaults on anything except an auto index page.
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chithanh
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PostPosted: Sat Sep 29, 2012 1:42 am    Post subject: Reply with quote

I suggest that you disable CONFIG_EXPERT altogether.
Is apache the only program that segfaults? Can you get a backtrace?
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NeddySeagoon
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PostPosted: Sat Sep 29, 2012 2:13 pm    Post subject: Reply with quote

chithanh,

I was being lazy with Expert as its forced on by something.

Its only Apache that segfaults - then only when serving something other then an auto index page.
I can get a backtrace but I was hoping to avoid it as it will be a first for me.

According to Google I will need to rebuild Apache to do it.
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PostPosted: Sun Oct 14, 2012 5:47 pm    Post subject: Reply with quote

My original install, with all the issues was a mix of cross compiled, native build and pump mode cross distcc built packages.

Having wimped out of learning to get a stack trace for the first time on something as complex as Apache, I rebuilt everything with pump mode cross distcc.
The only thing that would not build was Apache as it kept having linker problems with apr_crypto_<anything>
I traced that to a missing nss USE flag. I'm not sure if thats a bug or not.
Apache now says
http://192.168.100.33 wrote:
It works!
as it should.

I might have got there faster had I not been tempted by gcc-4.7.2 turning up in my cross environment. I should have known better ... too many variables.

Adding USE=nss and reverting to gcc-4.6.3 all round made it work. It makes me wonder how Apache ever built to give me segfaults in the first place.

Now to move all the pieces back to root over NFS
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XavierMiller
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PostPosted: Wed May 15, 2013 10:58 am    Post subject: Reply with quote

Hello,

It seems nss is needed, at least for dev-libs/apr-util.
I had crashes on a ~x86 configuration, and after added nss support in apr-utils, Apache-2.4 worked.

I opened a bug asking to enforce that dependancy
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brutto
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PostPosted: Sat Jul 13, 2013 1:07 pm    Post subject: Reply with quote

chithanh wrote:
Are you using the kernel bcmrpi_cutdown_defconfig? It enables CONFIG_EXPERT, which makes some things optional that apache requires for proper functioning.


How can I check this information, please?

My apache is failing with segmentation faults too :?

As far as I know, which is very little, getting an apache backtrace is no easy matter.

Perhaps I should go for another webserver?
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NeddySeagoon
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PostPosted: Sat Jul 13, 2013 4:08 pm    Post subject: Reply with quote

brutto,

Welcome to Gentoo.

If you need to ask about that, its not your problem but to test

zgrep /proc/config.gz CONFIG_EXPERT will tell the setting of that symbol. I get
Code:
roy@Pi_Net ~ $ zgrep CONFIG_EXPERT /proc/config.gz
CONFIG_EXPERT=y

Its not a problem by itself as its a control to enable you to set other options as you wish.

With the distributed kernel, apache works fine.
I did get apache to work but I have yet to build a working kernel.

You can see Kernel- Seeds on Apache on Gentoo on Pi at http://62.3.120.142/~seeds
It might be a bit slow now as your post reminded me to update the Pi.

I can host my Pi /usr/portage/packages if you want some binaries to play with.
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