Package: util-vserver Severity: normal Version: 0.30.216~r2772-3 I'm using a vserver kernel. I get failures within a vserver guest when i try to test the POSIX-style shared-memory commands with the .c examples found here:
http://www.cs.cf.ac.uk/Dave/C/node27.html#SECTION002730000000000000000 This turns out to be because the initial creation of /dev/shm inside the vserver (by initscripts.postinst during a stock lenny debootstrap) is defeated by /usr/lib/util-vserver/distributions/lenny/debootstrap.script: I created a stock debian vserver with: vserver monkey build -m debootstrap --context 101 --hostname monkey -- -d lenny -m http://ftp.us.debian.org/debian All this basically does is set up some vserver configs and then invoke debootstrap like this: vnamespace --new /usr/sbin/debootstrap lenny /etc/vservers/.defaults/vdirbase/monkey http://ftp.us.debian.org/debian /usr/lib/util-vserver/distributions/lenny/debootstrap.script After the debootstrap completes, .../distributions/lenny/debootstrap.script monkeys around with /dev within the chroot to replace it with the raw initial /dev: [...] function fixupDebian { $_RM -rf "$1"/dev $_MV "$1"/dev.X "$1"/dev } [...] mv "$VDIR"/dev "$VDIR"/dev.X "$_VNAMESPACE" --new -- \ "$DEBOOTSTRAP" $options "$@" "$DISTRIBUTION" "$VDIR" "$MIRROR" "$script" || : ## HACK: ignore all errors... fixupDebian "$VDIR" [...] However, one of the jobs of the initscripts.postinst (which is run during debootstrap) is to create /dev/shm for systems that do not have a dynamically-populated /dev. If the following two steps are done from the host before starting the vserver, POSIX-style shared memory seems to work within the vserver for me: mkdir /var/lib/vservers/$VSERVER_NAME/dev/shm chmod --reference=/dev/shm /var/lib/vservers/$VSERVER_NAME/dev/shm Perhaps this directory should be added into the default deboostrap operation? Are there other ways to resolve this that i missed? --dkg 0 cur:~# dpkg -l | egrep 'linux-image|vserver|initscripts' ii initscripts 2.86.ds1-61 Scripts for initializing and shutting down t ii kvm-modules-2.6.26-1-vserver-amd64 72+dfsg-2+2.6.26-8 kvm modules for Linux (kernel 2.6.26-1-vserv ii linux-headers-2.6.26-1-common-vserver 2.6.26-8 Common header files for Linux 2.6.26-1-vserv ii linux-headers-2.6.26-1-vserver-amd64 2.6.26-8 Header files for Linux 2.6.26-1-vserver-amd6 ii linux-image-2.6.26-1-vserver-amd64 2.6.26-8 Linux 2.6.26 image on AMD64, Linux-VServer s ii linux-image-vserver-amd64 2.6.26+16 Linux image on AMD64 ii util-vserver 0.30.216~r2772-3 user-space tools for Linux-VServer virtual p 0 cur:~#
pgpI9OF79SYLa.pgp
Description: PGP signature
