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环境:
iscsi server : openfiler eth0/eth1 bind->192.108.26.100
iqn.2006-01.com.openfiler:tsn.b45ae024d498
iqn.2006-01.com.openfiler:tsn.67571ed98f10
iscsi client : CentOS 6.6 eth1->192.108.26.117 eth2->192.108.26.118
1. 安装 iscsi-initiator
[root@ct6601 ~]# yum install -y iscsi-initiator-utils
2. 安装 device-mapper-multipath
[root@ct6601 ~]# yum install -y device-mapper-multipath
3. 设定 multipathd 服务开机自启动
[root@ct6601 etc]# chkconfig multipathd on
4. 测试网卡 eth1,eth2 能否 ping 通 iscsi server
[root@ct6601 ~]# ping -I eth1 192.108.26.100
[root@ct6601 ~]# ping -I eth2 192.108.26.100
5. 在 /etc/sysctl.conf 添加以下, 否则在第 8 步可能一直 timeout
[root@ct6601 ~]# cat >> /etc/sysctl.conf << EOF
net.ipv4.conf.eth1.rp_filter=2
net.ipv4.conf.eth2.rp_filter=2
EOF
[root@ct6601 ~]# sysctl -p
6. 修改 /etc/iscsi/iscsid.conf 中的 timeout 时间
[root@ct6601 ~]# cat /etc/iscsi/iscsid.conf |grep timeout|grep -v ^#
node.session.timeo.replacement_timeout = 2
node.conn[0].timeo.login_timeout = 2
node.conn[0].timeo.logout_timeout = 2
node.conn[0].timeo.noop_out_timeout = 2
node.session.err_timeo.abort_timeout = 2
node.session.err_timeo.lu_reset_timeout = 2
node.session.err_timeo.tgt_reset_timeout = 2
7. 建 iscsi iface
[root@ct6601 ~]# iscsiadm -m iface -I iface1 -o new
[root@ct6601 ~]# iscsiadm -m iface -I iface2 -o new
# 查看 /var/lib/iscsi/ 下的文件
[root@ct6601 ~]# cd /var/lib/iscsi/
[root@ct6601 iscsi]# du -sh *
12K ifaces
4.0K isns
4.0K nodes
4.0K send_targets
4.0K slp
4.0K static
# 绑定 iscsi iface 到网卡
[root@ct6601 iscsi]# iscsiadm -m iface -I iface1 -o update -n iface.net_ifacename -v eth1
[root@ct6601 iscsi]# iscsiadm -m iface -I iface2 -o update -n iface.net_ifacename -v eth2
8. 发现 iscsi target
[root@ct6601 iscsi]# iscsiadm -m discovery -t st -p 192.108.26.100 -I iface1 -I iface2
Starting iscsid: [OK]
192.108.26.100:3260,1 iqn.2006-01.com.openfiler:tsn.b45ae024d498
192.108.26.100:3260,1 iqn.2006-01.com.openfiler:tsn.67571ed98f10
192.108.26.100:3260,1 iqn.2006-01.com.openfiler:tsn.b45ae024d498
192.108.26.100:3260,1 iqn.2006-01.com.openfiler:tsn.67571ed98f10
# 发现后相关文件已经生成
[root@ct6601 iscsi]# du -sh *
12K ifaces
4.0K isns
36K nodes
28K send_targets
4.0K slp
4.0K static
9. 启动 iscsi 服务, 建立连接
[root@ct6601 iscsi]# service iscsi start
10. 查看连接信息及 iscsi 盘
[root@ct6601 ~]# iscsiadm -m session -P 1
Target: iqn.2006-01.com.openfiler:tsn.b45ae024d498 (non-flash)
Current Portal: 192.108.26.100:3260,1
Persistent Portal: 192.108.26.100:3260,1
**********
Interface:
**********
Iface Name: iface1
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.RedHat:bfec8c6a9151
Iface IPaddress: 192.108.26.117
Iface HWaddress: <empty>
Iface Netdev: eth1
SID: 5
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
**********
Interface:
**********
Iface Name: iface2
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:bfec8c6a9151
Iface IPaddress: 192.108.26.118
Iface HWaddress: <empty>
Iface Netdev: eth2
SID: 6
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
Target: iqn.2006-01.com.openfiler:tsn.67571ed98f10 (non-flash)
Current Portal: 192.108.26.100:3260,1
Persistent Portal: 192.108.26.100:3260,1
**********
Interface:
**********
Iface Name: iface1
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:bfec8c6a9151
Iface IPaddress: 192.108.26.117
Iface HWaddress: <empty>
Iface Netdev: eth1
SID: 7
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
**********
Interface:
**********
Iface Name: iface2
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:bfec8c6a9151
Iface IPaddress: 192.108.26.118
Iface HWaddress: <empty>
Iface Netdev: eth2
SID: 8
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
# 查看 iscsi 盘
[root@ct6601 iscsi]# fdisk -l
Disk /dev/sda: 32.2 GB, 32212254720 bytes
255 heads, 63 sectors/track, 3916 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0001e517
Device Boot Start End Blocks Id System
/dev/sda1 1 523 4194304 82 Linux swap / Solaris
Partition 1 does not end on cylinder boundary.
/dev/sda2 * 523 3917 27261952 83 Linux
Disk /dev/sdb: 42.9 GB, 42949672960 bytes
64 heads, 32 sectors/track, 40960 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xfef2bf25
Disk /dev/sdc: 42.9 GB, 42949672960 bytes
64 heads, 32 sectors/track, 40960 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xfef2bf25
Disk /dev/sdd: 42.9 GB, 42949672960 bytes
64 heads, 32 sectors/track, 40960 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xab210de1
Disk /dev/sde: 42.9 GB, 42949672960 bytes
64 heads, 32 sectors/track, 40960 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xab210de1
11. 查看 wwid
[root@ct6601 ~]# scsi_id -gu /dev/sdb
14f504e46494c45527646546462502d716247302d7a61554b
[root@ct6601 ~]# scsi_id -gu /dev/sdc
14f504e46494c45527646546462502d716247302d7a61554b
[root@ct6601 ~]# scsi_id -gu /dev/sdd
14f504e46494c45524b61654859532d47436c612d30625046
[root@ct6601 ~]# scsi_id -gu /dev/sde
14f504e46494c45524b61654859532d47436c612d30625046
12. 配置 /etc/multipath.conf
[root@ct6601 etc]# cat /etc/multipath.conf
defaults {
user_friendly_names yes
}
multipaths {
multipath {
wwid 14f504e46494c45527646546462502d716247302d7a61554b
alias dm1
path_grouping_policy multibus
failback manual
rr_weight priorities
no_path_retry 5
}
multipath {
wwid 14f504e46494c45524b61654859532d47436c612d30625046
alias dm2
path_grouping_policy multibus
failback manual
rr_weight priorities
no_path_retry 5
}
}
13. 启动 multipathd
[root@ct6601 etc]# service multipathd restart
14. 查看 multipath 信息及 mapper 盘
[root@ct6601 ~]# multipath -ll
dm2 (14f504e46494c45524b61654859532d47436c612d30625046) dm-1 OPNFILER,VIRTUAL-DISK
size=40G features=’1 queue_if_no_path’ hwhandler=’0′ wp=rw
`-+- policy=’round-robin 0′ prio=1 status=active
|- 6:0:0:0 sdd 8:48 active ready running
`- 5:0:0:0 sde 8:64 active ready running
dm1 (14f504e46494c45527646546462502d716247302d7a61554b) dm-0 OPNFILER,VIRTUAL-DISK
size=40G features=’1 queue_if_no_path’ hwhandler=’0′ wp=rw
`-+- policy=’round-robin 0′ prio=1 status=active
|- 3:0:0:0 sdb 8:16 active ready running
`- 4:0:0:0 sdc 8:32 active ready running
[root@ct6601 etc]# ll /dev/mapper/
total 0
crw-rw—- 1 root root 10, 58 May 11 08:28 control
lrwxrwxrwx 1 root root 7 May 11 09:27 dm1 -> ../dm-0
lrwxrwxrwx 1 root root 7 May 11 09:27 dm2 -> ../dm-1
15. 验证可用性
略.
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