{{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
 外向きNICのIP   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    ssi9.mycluster.home         ssi9
 192.168.99.10   ssi10.mycluster.home         ssi10
 192.168.99.11   ssi11.mycluster.home         ssi11
 192.168.99.12   ssi12.mycluster.home         ssi12
*/etc/fstab
 proc          /proc               proc  defaults          0 0
 UUID=hogehoge /                   ext4  errors=remount-ro 0 1
 /boot         /srv/tftp/boot      none  bind              0 0
 LABEL=OCFS2   /work               ocfs2 _netdev           0 0
 /bin          /NFSROOT/slave/bin  none  bind              0 0
 /usr          /NFSROOT/slave/usr  none  bind              0 0
 /sbin         /NFSROOT/slave/sbin none  bind              0 0
 /home         /NFSROOT/slave/home none  bind              0 0
 /lib          /NFSROOT/slave/lib  none  bind              0 0
 /opt          /NFSROOT/slave/opt  none  bind              0 0
 /root         /NFSROOT/slave/root none  bind              0 0
*/etc/default/o2cb
 O2CB_ENABLED=true
 O2CB_BOOTCLUSTER=ocfs2
 O2CB_HEARTBEAT_THRESHOLD=31
 O2CB_IDLE_TIMEOUT_MS=30000
 O2CB_KEEPALIVE_DELAY_MS=2000
 O2CB_RECONNECT_DELAY_MS=2000
*コマンド
 sudo apt-get install \
 libssl-dev iscsitarget-dkms \
 iscsitarget open-iscsi ocfs2-tools
 sudo ne /etc/default/iscsitarget
 sudo ne /etc/iet/ietd.conf
 sudo /etc/init.d/iscsitarget start
 sudo ne /etc/iscsi/iscsid.conf
 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 ne /etc/default/o2cb
 sudo cp \
 /usr/share/doc/ocfs2-tools/examples/cluster.conf \
 /etc/ocfs2/
 sudo ne /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 ne /etc/fstab