From Lenny

www / # apache2 -v
Server version: Apache/2.2.9 (Debian)
Server built:   Dec 11 2010 18:58:55

To Squeeze

www / # apache2 -v
Server version: Apache/2.2.16 (Debian)
Server built:   Jan  1 2011 21:57:29

On ~100 vserver containers..

What happened?

1) /etc/apache2/envvars nonsense (UID and GID are not there anymore and
must be duplicated?)

2) http://httpd.apache.org/docs/2.2/mod/mpm_common.html#chrootdir
Compatibility:	Available in Apache 2.2.10 and later

From 2.2.10 the same directive ChrootDir previously used by 
LoadModule chroot_module /usr/lib/apache2/modules/mod_chroot.so

http://core.segfault.pl/~hobbit/mod_chroot/

has been used by Apache core!

                             MEEEEHHHH...

# strace -s 10000 -e chroot,chdir apache2 -f /etc/apache2/apache2.conf -X
--- SIGCHLD (Child exited) @ 0 (0) ---
chroot("/home/www.foobar.it")     = 0
chdir("/")                              = 0
chdir("/home/www.foobar.it")      = -1 ENOENT (No such file or directory)

Solutions:

1) Hardcode apache.conf and use the new moronized envvars, hopefully
demoronizing it a little (i don't use multiple apache istances, it's
not openvpn)

2) Comment and remove mod-chroot

------------------------------------------------------------------------

echo "deb http://mi.mirror.garr.it/mirrors/debian/ stable main
deb-src http://mi.mirror.garr.it/mirrors/debian/ stable main

deb http://security.debian.org/ stable/updates main
deb-src http://security.debian.org/ stable/updates main

# Volatile has been discontinued with Squeeze
#deb http://volatile.debian.org/debian-volatile stable/volatile main
#deb-src http://volatile.debian.org/debian-volatile stable/volatile main
deb http://ftp.debian.org/debian squeeze-updates main
" > /etc/apt/sources.list

chmod 600 /etc/apt/sources.list

apt-get update
apt-get upgrade
apt-get dist-upgrade

apt-get autoremove
apt-get clean
apt-get autoclean
apt-get check

dpkg --configure -a

/etc/init.d/apache2 stop

. /etc/apache2/envvars

sed -i "
	s/\${APACHE_PID_FILE}/`echo $APACHE_PID_FILE | sed "s/\//\\\\\\\\\\//g"`/g;
	s/\${APACHE_RUN_USER}/`echo $APACHE_RUN_USER | sed "s/\//\\\\\\\\\\//g"`/g;
	s/\${APACHE_RUN_GROUP}/`echo $APACHE_RUN_GROUP | sed "s/\//\\\\\\\\\\//g"`/g;
	s/^LoadModule chroot_module \/usr\/lib\/apache2\/modules\/mod_chroot.so//g;
" /etc/apache2/apache2.conf

echo "unset HOME

export APACHE_PID_FILE=$APACHE_PID_FILE
export APACHE_RUN_USER=$APACHE_RUN_USER
export APACHE_RUN_GROUP=$APACHE_RUN_GROUP
export APACHE_RUN_DIR=/var/run/apache2
export APACHE_LOCK_DIR=/var/lock/apache2
export APACHE_LOG_DIR=/var/log/apache2

. /etc/default/locale
export LANG
" > /etc/apache2/envvars

apt-get remove mod-chroot-common
apt-get remove strace
apt-get autoremove

apache2 -t
/etc/init.d/apache2 start