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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] (current)
bengen
Line 1: Line 1:
-====== Migrating Debian GNU/Linux 4.0 (etch) or later to an AoE target ====== +This page has been moved to [[sanboot:​debian_and_ubuntu]]
-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>​ +

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