Table of Contents

Server

aptitude install iscsitarget
ed -s /etc/default/iscsitarget <<< $',s/ISCSITARGET_ENABLE=false/ISCSITARGET_ENABLE=true/g\nw'

Install iscsitarget and open-iscsi on Debian Squeeze

This shouldn't be to difficult in Debian: 

apt-get update apt-get install iscsitarget iscsitarget-source open-iscsi module-assistant

After install iscsitarget you should also build its kernel module (this step may skipped if you are using Debian Squeeze, by installing, e.g. iscsitarget-modules-2.6-amd64) for non-stable Debian kernel: 

module-assistant a-i iscsitarget

After that, restart iscsitarget with following command: 

/etc/init.d/iscsitarget restart

Client

iscsiadm -m discovery -t st -p 10.39.99.150
iscsiadm -m node -T iqn.2009-01.avi.wd-store1:storage.mirror1.sys1 -p 10.39.99.150 --login
iscsiadm -m session
fdisk /dev/sda
mkfs.ext3 /dev/sda1
mount /dev/sda1 /mnt

Automaticke pripojeni po startu: node.startup = automatic do /etc/iscsi/nodes/iqn.2009-01.avi.wd-store1\:storage.mirror1.sys1/10.39.99.150\,3260 

ietadm --op new --tid=32 --params Name='iqn.2009-05.cz.panelnet:storage.tukan.vlcek'
ietadm --op new --tid=32 --lun=0 --params Path=/dev/vg_cloud/lv_vlcek

Aby se automaticky pripojil i filesystem je potreba udelat tyhle zasadni veci:

  • pass v /etc/fstab musi byt 0
  • v options v fstab musi byt _netdev
  • je pry jako nejak lepsi, kdyz je ve fstab zarizeni zapsano jako UUID=bordel nez /dev/disk/by-path/… (muj dojem je, ze by to mohlo byt jedno, ale vi buh jak ty initskripty interreaguji s udevem)

A souvisejici: instalace debianu na iscsi root: http://www.david-web.co.uk/blog/?p=188

Pro 10Gbit sitovku

Before installing iSCSI software, we recommend the use of sysctl to tune Myri-10G TCP/IP for iSCSI on both the Initiator and the Target. These settings recommended by open-iscsi.org work well: 

  net.ipv4.tcp_timestamps = 0
  net.ipv4.tcp_sack = 0
  net.ipv4.tcp_rmem = 10000000 10000000 10000000
  net.ipv4.tcp_wmem = 10000000 10000000 10000000
  net.ipv4.tcp_mem = 10000000 10000000 10000000
  net.ipv4.tcp_tw_recycle = 1
  net.ipv4.tcp_tw_reuse = 1
  net.core.rmem_max = 524287
  net.core.wmem_max = 524287
  net.core.rmem_default = 524287
  net.core.wmem_default = 524287
  net.core.optmem_max = 524287
  net.core.netdev_max_backlog = 300000

Takova drobna poznamka je, ze tohle je pro myrinet, jehoz 10G varianta sice je vicemene totez jako 10G ethernet, ale ne uplne (ve smyslu, ze takovyhle ladeni na ethernetu stejne nema cenu).

Building a SAN Storage Device Using iSCSI on SUSE Linux

 
linux/san.txt · Last modified: 2012/10/03 15:05 by dfox