{{category PCクラスタ}}
*iSCSI+OCFS2で高速共有ディスク
　Debian squeezeにおいて、mdadmで構築したRAIDボリュームをiSCSI+OCFS2で共有する設定。
*/etc/ocfs2/cluster.conf
 node:
         ip_port = 7777
         ip_address = 192.168.99.1
         number = 0
         name = blackthunder
         cluster = ocfs2
 
 node:
         ip_port = 7777
         ip_address = 192.168.99.5
         number = 1
         name = ssi5
         cluster = ocfs2
 
 node:
         ip_port = 7777
         ip_address = 192.168.99.6
         number = 2
         name = ssi6
         cluster = ocfs2
 
 node:
         ip_port = 7777
         ip_address = 192.168.99.7
         number = 3
         name = ssi7
         cluster = ocfs2
 
 node:
         ip_port = 7777
         ip_address = 192.168.99.8
         number = 4
         name = ssi8
         cluster = ocfs2
 
 node:
         ip_port = 7777
         ip_address = 192.168.99.9
         number = 5
         name = ssi9
         cluster = ocfs2
 
 node:
         ip_port = 7777
         ip_address = 192.168.99.10
         number = 6
         name = ssi10
         cluster = ocfs2
 
 node:
         ip_port = 7777
         ip_address = 192.168.99.11
         number = 7
         name = ssi11
         cluster = ocfs2
 
 node:
         ip_port = 7777
         ip_address = 192.168.99.12
         number = 8
         name = ssi12
         cluster = ocfs2
 
 cluster:
         node_count = 8
         name = ocfs2
*/etc/default/iscsitarget
 ISCSITARGET_ENABLE=true
 ISCSITARGET_OPTIONS=""
*/etc/iet/ietd.conf
 Target iqn.hostname:diskid
 IncomingUser iscsi password
 OutgoingUser iscsi password
 Lun 0 Path=/dev/md0,Type=fileio
*/etc/iscsi/iscsid.conf
 node.startup = automatic
 node.session.auth.authmethod = CHAP
 node.session.auth.username = iscsi
 node.session.auth.password = password
 discovery.sendtargets.auth.authmethod = CHAP
 discovery.sendtargets.auth.username = iscsi
 discovery.sendtargets.auth.password = password
 node.session.timeo.replacement_timeout = 120
 node.conn[0].timeo.login_timeout = 15
 node.conn[0].timeo.logout_timeout = 15
 node.conn[0].timeo.noop_out_interval = 5
 node.conn[0].timeo.noop_out_timeout = 5
 node.session.err_timeo.abort_timeout = 15
 node.session.err_timeo.lu_reset_timeout = 20
 node.session.initial_login_retry_max = 8
 node.session.cmds_max = 128
 node.session.queue_depth = 32
 node.session.xmit_thread_priority = -20
 node.session.iscsi.InitialR2T = No
 node.session.iscsi.ImmediateData = Yes
 node.session.iscsi.FirstBurstLength = 262144
 node.session.iscsi.MaxBurstLength = 16776192
 node.conn[0].iscsi.MaxRecvDataSegmentLength = 262144
 discovery.sendtargets.iscsi.MaxRecvDataSegmentLength = 32768
 node.session.iscsi.FastAbort = Yes
*/etc/hosts
 127.0.0.1       localhost
 127.0.1.1       hostname.hogehoge.com       hostname
 192.168.99.1    hostname.mycluster.home     hostname
 192.168.99.5    ssi5.mycluster.home         ssi5
 192.168.99.6    ssi6.mycluster.home         ssi6
 192.168.99.7    ssi7.mycluster.home         ssi7
 192.168.99.8    ssi8.mycluster.home         ssi8
 192.168.99.9    ssi5.mycluster.home         ssi9
 192.168.99.10   ssi6.mycluster.home         ssi10
 192.168.99.11   ssi7.mycluster.home         ssi11
 192.168.99.12   ssi8.mycluster.home         ssi12
*コマンド
 sudo apt-get install \
 libssl-dev iscsitarget-dkms \
 iscsitarget open-iscsi ocfs2-tools
 sudo nano -w /etc/default/iscsitarget
 #ISCSITARGET_ENABLEをtrueに
 sudo nano -w /etc/iet/ietd.conf
 #変更点は以下
 #IncomingUser username password
 #OutgoingUser username password
 #Target targetname:diskid
 #IncomingUser username password
 #OutgoingUser username password
 #Lun 0 Path=/dev/md0,Type=fileio
 sudo /etc/init.d/iscsitarget start
 sudo nano -w /etc/iscsi/iscsid.conf
 #変更点は以下
 #node.startup = automatic
 #node.session.auth.authmethod = CHAP
 #node.session.auth.username = username
 #node.session.auth.password = password
 #discovery.sendtargets.auth.authmethod = CHAP
 #discovery.sendtargets.auth.username = username
 #discovery.sendtargets.auth.password = password
 sudo /etc/init.d/open-iscsi start
 sudo iscsiadm -m discovery -t st -p localhost
 sudo iscsiadm -m node \
 --targetname targetname:diskid \
 --portal 127.0.0.1 --login
 sudo nano -w /etc/default/o2cb
 #変更点は以下
 #O2CB_ENABLED=true
 #O2CB_BOOTCLUSTER=ocfs2
 sudo cp \
 /usr/share/doc/ocfs2-tools/examples/cluster.conf \
 /etc/ocfs2/
 sudo nano -w /etc/ocfs2/cluster.conf
 sudo /etc/init.d/o2cb start
 sudo fdisk
 n
 p
 1
 (そのままEnter)
 (そのままEnter)
 w
 sudo mkfs.ocfs2 -L OCFS2 /dev/sdg1
 sudo mkdir -p /work
 sudo mount -L OCFS2 /work
 sudo nano -w /etc/fstab
 #変更点は以下
 #LABEL=OCFS2 /work ocfs2 _netdev 0 0