Bug#495042: debian-installer: add iscsi root installation
Hi,
Bumping an old feature request.
On Thursday, August 14, 2008 09:42:31 AM you wrote:
> Add iscsi root installation feature to debian installer.
I was wondering if there were any plans to add this?
Did experiment a bit with it myself, and it's not that much work to simply
detect the iSCSI settings set in the BIOS/boot firmware, and connect to the
iSCSI target automatically, like CentOS and Windows do.
See the attached (unpolished) patches as a starting point of a way this can be
done.
In short what is necessary is:
- check for the presence of an iBFT table in memory. This can be done by
loading the iscsi_ibft kernel module and checking /sys.
Since it only scans a memory region and does not do any more agressive
probing, it's safe to load by default.
- if found, it means iSCSI is configured on the computer and the other iscsi
kernel modules should be loaded. As well as an udeb with the open-scsi
usermode tools that are responsible for setting up the connection. Calling
"iscsistart -b" is enough to automatically connect to the target using the
information found in the iBFT and attach the disks.
- make sure open-iscsi is added to the packages to be installed, and that a
initramfs with iscsi support is created, so that the system will start after
reboot.
--
Yours sincerely,
Floris Bos
diff -ur hw-detect-1.87.orig/debian/disk-detect.templates hw-detect-1.87/debian/disk-detect.templates
--- hw-detect-1.87.orig/debian/disk-detect.templates 2011-06-23 21:57:17.000000000 +0200
+++ hw-detect-1.87/debian/disk-detect.templates 2011-07-13 01:10:41.000000000 +0200
@@ -42,3 +42,13 @@
Description: for internal use; can be preseeded
Check for the presence of multipath devices?
+Template: disk-detect/iscsi_connect
+Type: text
+# :sl2:
+_Description: Connecting to iSCSI target
+
+Template: disk-detect/iscsi_error
+Type: error
+# :sl2:
+_Description: Error connecting to iSCSI target (using the login information found in the iBFT)
+
diff -ur hw-detect-1.87.orig/disk-detect.sh hw-detect-1.87/disk-detect.sh
--- hw-detect-1.87.orig/disk-detect.sh 2011-06-23 21:57:17.000000000 +0200
+++ hw-detect-1.87/disk-detect.sh 2011-07-13 01:24:09.000000000 +0200
@@ -120,10 +120,31 @@
fi
}
+iscsi_probe() {
+
+ log "Looking for iSCSI iBFT table..."
+ modprobe iscsi_ibft || true
+
+ if [ -e /sys/firmware/ibft/target0 ]; then
+ anna-install open-iscsi-udeb
+ modprobe iscsi_tcp
+ db_progress START 0 1 disk-detect/iscsi_connect
+ iscsistart -b || db_input high disk-detect/iscsi_error
+ db_progress STOP
+ apt-install open-iscsi || true
+ else
+ log "No iSCSI iBFT table found, not loading iSCSI package"
+ fi
+
+ return 0
+}
+
if ! hw-detect disk-detect/detect_progress_title; then
log "hw-detect exited nonzero"
fi
+iscsi_probe
+
while ! disk_found; do
CHOICES=""
for mod in $(list_disk_modules | sort); do
diff -ur kernel-wedge-2.77.orig/modules/scsi-modules kernel-wedge-2.77/modules/scsi-modules
--- kernel-wedge-2.77.orig/modules/scsi-modules 2011-03-12 19:38:58.000000000 +0100
+++ kernel-wedge-2.77/modules/scsi-modules 2011-07-11 20:03:03.000000000 +0200
@@ -26,3 +26,5 @@
aic94xx ?
stex ?
xen-blkfront ?
+iscsi_tcp ?
+iscsi_ibft ?
diff -urN open-iscsi-2.0.871.3.orig/debian/control open-iscsi-2.0.871.3/debian/control
--- open-iscsi-2.0.871.3.orig/debian/control 2011-05-02 20:52:46.000000000 +0200
+++ open-iscsi-2.0.871.3/debian/control 2011-07-11 19:31:03.000000000 +0200
@@ -28,6 +28,15 @@
The userspace component consists of a daemon, iscsid and a management
utility, iscsiadm
+Package: open-iscsi-udeb
+Architecture: any
+Section: debian-installer
+XC-Package-Type: udeb
+Depends: ${shlibs:Depends}, ${misc:Depends}, scsi-modules, libnss-files-udeb
+Description: Open-iSCSI initiator
+ .
+ For use by debian-installer.
+
#Package: linux-iscsi-modules-source
#Architecture: all
#Depends: ${shlibs:Depends}, ${misc:Depends}, module-assistant, debhelper (>= 4.0.0), bzip2
diff -urN open-iscsi-2.0.871.3.orig/debian/extra/initramfs.hook open-iscsi-2.0.871.3/debian/extra/initramfs.hook
--- open-iscsi-2.0.871.3.orig/debian/extra/initramfs.hook 2011-05-02 20:52:46.000000000 +0200
+++ open-iscsi-2.0.871.3/debian/extra/initramfs.hook 2011-07-13 01:02:57.000000000 +0200
@@ -26,6 +26,6 @@
cp /etc/iscsi/initiatorname.iscsi $DESTDIR/etc
cp /etc/iscsi/iscsi.initramfs $DESTDIR/etc
-for x in crc32c libcrc32c iscsi_tcp libiscsi scsi_transport_iscsi; do
+for x in crc32c libcrc32c iscsi_tcp iscsi_ibft libiscsi scsi_transport_iscsi; do
manual_add_modules ${x}
done
diff -urN open-iscsi-2.0.871.3.orig/debian/open-iscsi-udeb.dirs open-iscsi-2.0.871.3/debian/open-iscsi-udeb.dirs
--- open-iscsi-2.0.871.3.orig/debian/open-iscsi-udeb.dirs 1970-01-01 01:00:00.000000000 +0100
+++ open-iscsi-2.0.871.3/debian/open-iscsi-udeb.dirs 2011-07-11 23:20:22.000000000 +0200
@@ -0,0 +1,5 @@
+usr/bin
+usr/sbin
+var/lib/open-iscsi
+usr/lib/finish-install.d
+etc/iscsi
diff -urN open-iscsi-2.0.871.3.orig/debian/open-iscsi-udeb.finish-install open-iscsi-2.0.871.3/debian/open-iscsi-udeb.finish-install
--- open-iscsi-2.0.871.3.orig/debian/open-iscsi-udeb.finish-install 1970-01-01 01:00:00.000000000 +0100
+++ open-iscsi-2.0.871.3/debian/open-iscsi-udeb.finish-install 2011-07-13 01:02:25.000000000 +0200
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+#
+# We are using iSCSI as root so make sure it is in the initramfs
+#
+
+echo 'ISCSI_AUTO=true' > /target/etc/iscsi/iscsi.initramfs
+in-target update-initramfs -uv
+
+exit 0
+
diff -urN open-iscsi-2.0.871.3.orig/debian/rules open-iscsi-2.0.871.3/debian/rules
--- open-iscsi-2.0.871.3.orig/debian/rules 2011-05-02 20:52:46.000000000 +0200
+++ open-iscsi-2.0.871.3/debian/rules 2011-07-11 23:36:40.000000000 +0200
@@ -91,6 +91,16 @@
install -m 755 debian/extra/initramfs.local-top \
$(CURDIR)/debian/open-iscsi/usr/share/initramfs-tools/scripts/local-top/iscsi
+ # debian/open-iscsi-udeb
+ install -m 755 usr/iscsiadm $(CURDIR)/debian/open-iscsi-udeb/usr/bin
+ install -m 755 usr/iscsid $(CURDIR)/debian/open-iscsi-udeb/usr/sbin
+ install -m 755 usr/iscsistart $(CURDIR)/debian/open-iscsi-udeb/usr/sbin
+ install -m 755 utils/iscsi_discovery $(CURDIR)/debian/open-iscsi-udeb/usr/sbin
+ install -m 755 utils/iscsi-iname $(CURDIR)/debian/open-iscsi-udeb/usr/sbin
+ install -m 644 debian/initiatorname.iscsi $(CURDIR)/debian/open-iscsi-udeb/etc/iscsi/initiatorname.iscsi
+ install -m 600 etc/iscsid.conf $(CURDIR)/debian/open-iscsi-udeb/etc/iscsi
+ install -m 755 debian/open-iscsi-udeb.finish-install $(CURDIR)/debian/open-iscsi-udeb/usr/lib/finish-install.d/10open-iscsi
+
dh_install -s
# Must not depend on anything. This is to be called by
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