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iscsiboot [2006/09/18 05:23] mcb30 |
iscsiboot [2006/12/11 06:47] (current) mcb30 |
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| * [[#Transferring the operating system image to an iSCSI target]] | * [[#Transferring the operating system image to an iSCSI target]] | ||
| * [[#Booting the operating system from the iSCSI target]] | * [[#Booting the operating system from the iSCSI target]] | ||
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| + | {{ iscsiboot/fc5-iscsi.png?360x200|Fedora Core 5 booting via iSCSI}} | ||
| ===== Preparing the operating system image ===== | ===== Preparing the operating system image ===== | ||
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| * [[iscsibootprepfc5|Fedora Core 5]] | * [[iscsibootprepfc5|Fedora Core 5]] | ||
| + | * [[iscsibootprepw2k3|Windows Server 2003]] | ||
| ===== Transferring the operating system image to an iSCSI target ===== | ===== Transferring the operating system image to an iSCSI target ===== | ||
| - | The second stage is to transfer the prepared operating system image to a remote iSCSI target. | + | The second stage is to transfer the prepared operating system image from the iSCSI boot machine to a remote iSCSI target. |
| If you do not have an iSCSI NAS box, you probably want to set up the Linux software iSCSI target. You can find prepackaged versions at http://sourceforge.net/project/showfiles.php?group_id=177003; you need to download and install the ''iscsitarget'' and ''dkms-iscsi_trgt'' RPMs. | If you do not have an iSCSI NAS box, you probably want to set up the Linux software iSCSI target. You can find prepackaged versions at http://sourceforge.net/project/showfiles.php?group_id=177003; you need to download and install the ''iscsitarget'' and ''dkms-iscsi_trgt'' RPMs. | ||
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| ===== Booting the operating system from the iSCSI target ===== | ===== Booting the operating system from the iSCSI target ===== | ||
| + | The third stage is to configure the network card for iSCSI boot, and then to attempt booting. | ||
| + | |||
| + | You need a network card boot ROM that supports iSCSI boot. If your NIC vendor does not already supply such a ROM, you can build your own using | ||
| + | |||
| + | cvs -d:pserver:anonymous@etherboot.cvs.sourceforge.net:/cvsroot/etherboot login | ||
| + | cvs -z3 -d:pserver:anonymous@etherboot.cvs.sourceforge.net:/cvsroot/etherboot co -P gpxe | ||
| + | cd gpxe/gpxe-0.5/src | ||
| + | make bin/rtl8139.rom | ||
| + | |||
| + | which will give you a boot ROM image for a RealTek 8139-based network card. Many other cards are available; if you can't find the one you need then ask on <etherboot-discuss@lists.sourceforge.net> for help. | ||
| + | |||
| + | For experimentation, you may prefer to build a "boot ROM on a floppy", which you can do by changing ''.rom'' to ''.dsk'', e.g. | ||
| + | |||
| + | make bin/rtl8139.dsk | ||
| + | |||
| + | This will give you a bootable floppy disk containing the boot ROM code, which may make testing easier. Once you have later verified that everything works, you can burn the code into the ROM. | ||
| + | |||
| + | You need to set up your DHCP server to request iSCSI boot. Edit /etc/dhcpd.conf and change or add the line | ||
| + | |||
| + | filename ""; | ||
| + | option root-path "iscsi:192.168.0.1::::iqn.2006-09.com.example.myhost:storage"; | ||
| + | |||
| + | where ''192.168.0.1'' is the IP address of your iSCSI target, and ''iqn.2006-09.com.example.myhost:storage'' is the target name. | ||
| + | |||
| + | Now boot the iSCSI boot machine using the iSCSI boot ROM (or iSCSI boot floppy, if you are using a floppy disk for experimentation). You should see the usual bootloader screen (LILO, grub or NTLDR, for example) appear, and the operating system will start as normal. | ||
| + | |||
| + | Congratulations! You have successfully booted an operating system from a remote iSCSI disk. If you encounter difficulties, please feel free to ask questions on the etherboot-discuss mailing list at <etherboot-discuss@lists.sourceforge.net>. If you have an urgent question, [[consultancy|professional support]] is available on a consultancy basis. | ||
