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debian_aoe_migrate [2007/08/24 14:57] bengen point out choice of real disk or chrooted image |
debian_aoe_migrate [2007/09/30 09:02] bengen |
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| - | ====== Migrating Debian GNU/Linux 4.0 (etch) or later to an AoE target ====== | ||
| - | You can either work witha an installation | ||
| - | - that is running off a physical disk on a client machine or | ||
| - | - a loopback-mounted disk image running as a ''chroot(8)'' environment | ||
| - | |||
| - | Install the ''aoetools'' package and a kernel image that includes the | ||
| - | ''aoe'' driver, i.e. one of the ''linux-image-2.6.18-*'' drivers | ||
| - | that ship with Debian/etch. | ||
| - | |||
| - | Create two scripts as shown below | ||
| - | * ''/etc/initramfs-tools/hooks/aoetools'' will copy the ''aoe'' kernel module and ''/sbin/aoe-discover'' to the initial ramdisk. | ||
| - | * ''/etc/initramfs-tools/scripts/local-top/aoetools'' is copied to the ram disk and run at boot-time, just before the root filesystem is mounted. If the root device string looks like an AoE target, it brings up all recognized Ethernet interfaces and activates the AoE driver. | ||
| - | |||
| - | After you have made sure that ''/etc/initramfs-tools/initramfs.conf'' | ||
| - | contains the line | ||
| - | BUSYBOX=y | ||
| - | you can update the initial ramdisk: | ||
| - | # update-initramfs -u -k all | ||
| - | |||
| - | FIXME Create/update ''/etc/fstab'' | ||
| - | |||
| - | FIXME Create/update ''/boot/grub/menu.lst'' | ||
| - | |||
| - | If the modifications were applied to a physical disk on the client | ||
| - | machine, you can now [[santransfer|transfer]] the contents of your | ||
| - | physical disk to the SAN target. | ||
| - | |||
| - | If the image you wish to export to client systems was modified directly,, | ||
| - | just make the contents of that image [[sanexport|available]]. | ||
| - | |||
| - | ==== Hints ==== | ||
| - | * If the system hangs before the root device has been mounted, passing ''break=mount'' on the command line will spawn a shell before `scripts/local-top/aoetools' is run. This should allow for further debugging. | ||
| - | |||
| - | |||
| - | ===== Configuration files ===== | ||
| - | ==== /etc/initramfs-tools/hooks/aoetools ==== | ||
| - | <code bash> | ||
| - | #!/bin/sh | ||
| - | |||
| - | set -e | ||
| - | |||
| - | PREREQ="" | ||
| - | |||
| - | prereqs() | ||
| - | { | ||
| - | echo "$PREREQ" | ||
| - | } | ||
| - | |||
| - | case $1 in | ||
| - | prereqs) | ||
| - | prereqs | ||
| - | exit 0 | ||
| - | ;; | ||
| - | esac | ||
| - | |||
| - | . /usr/share/initramfs-tools/hook-functions | ||
| - | |||
| - | [ -x /sbin/aoe-discover ] && copy_exec /sbin/aoe-discover /sbin | ||
| - | manual_add_modules aoe | ||
| - | </code> | ||
| - | |||
| - | ==== /etc/initramfs-tools/scripts/local-top/aoetools ==== | ||
| - | <code bash> | ||
| - | #!/bin/sh | ||
| - | |||
| - | set -e | ||
| - | |||
| - | PREREQ="" | ||
| - | |||
| - | prereqs() | ||
| - | { | ||
| - | echo "$PREREQ" | ||
| - | } | ||
| - | |||
| - | case $1 in | ||
| - | prereqs) | ||
| - | prereqs | ||
| - | exit 0 | ||
| - | ;; | ||
| - | esac | ||
| - | |||
| - | case $ROOT in | ||
| - | /dev/etherd/e*) | ||
| - | INTERFACES=`awk -F: '/eth[0-9]*:/ { print $1 }' < /proc/net/dev` | ||
| - | for i in $INTERFACES; do | ||
| - | echo Bringing up interface $i for AoE | ||
| - | ifconfig $i up | ||
| - | done | ||
| - | sleep 5 | ||
| - | modprobe aoe | ||
| - | aoe-discover | ||
| - | ;; | ||
| - | esac | ||
| - | </code> | ||
