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iSCSI command
source link: http://bean-li.github.io/iSCSI-Command/?amp%3Butm_medium=referral
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前言
iSCSI客户端常用命令总是忘记,在此处记录下。
常用命令
查看当前session
挂载之前,一般如下图所示:
root@node-242:~# iscsiadm -m session iscsiadm: No active sessions.
挂载之后:
root@node-242:~# iscsiadm -m session tcp: [2] 10.16.172.247:3260,1 iqn.2018-11.com:BEAN root@node-242:~# iscsiadm -m session -P 3 iSCSI Transport Class version 2.0-870 version 2.0-871 Target: iqn.2018-11.com:BEAN Current Portal: 10.16.172.247:3260,1 Persistent Portal: 10.16.172.247:3260,1 ********** Interface: ********** Iface Name: default Iface Transport: tcp Iface Initiatorname: iqn.1993-08.org.debian:01:c9c12dd76e Iface IPaddress: 10.16.172.242 Iface HWaddress: (null) Iface Netdev: (null) SID: 2 iSCSI Connection State: LOGGED IN iSCSI Session State: LOGGED_IN Internal iscsid Session State: NO CHANGE ************************ Negotiated iSCSI params: ************************ HeaderDigest: None DataDigest: None MaxRecvDataSegmentLength: 262144 MaxXmitDataSegmentLength: 1048576 FirstBurstLength: 262144 MaxBurstLength: 1048576 ImmediateData: Yes InitialR2T: No MaxOutstandingR2T: 1 ************************ Attached SCSI devices: ************************ Host Number: 25 State: running scsi25 Channel 00 Id 0 Lun: 0 Attached scsi disk sde State: running
根据IP 发现target
iscsiadm -m discovery -t st -p 10.16.172.246
输出如下:
root@node-242:~# iscsiadm -m discovery -t st -p 10.16.172.246 10.16.172.246:3260,1 iqn.2018-11.com:BEAN 10.16.172.247:3260,1 iqn.2018-11.com:BEAN 10.16.172.248:3260,1 iqn.2018-11.com:BEAN
登录到指定target
iscsiadm -m node -T [target_name] -p [ip:3260] -l 如下所示: iscsiadm -m node -T iqn.2018-11.com:BEAN -p 10.16.172.246:3260 -l
输出如下:
root@node-242:~# iscsiadm -m node -T iqn.2018-11.com:BEAN -p 10.16.172.246:3260 -l Logging in to [iface: default, target: iqn.2018-11.com:BEAN, portal: 10.16.172.246,3260] Login to [iface: default, target: iqn.2018-11.com:BEAN, portal: 10.16.172.246,3260]: successful
登录之后,可以用iscsiadm -m session查看。结果一般如下所示:
root@node-242:~# iscsiadm -m session tcp: [3] 10.16.172.246:3260,1 iqn.2018-11.com:BEAN
登出指定target
iscsiadm -m node -T [target_name] -p [ip:3260] -u
具体指令如下所示:
root@node-242:~# iscsiadm -m node -T iqn.2018-11.com:BEAN -p 10.16.172.246:3260 -u Logging out of session [sid: 3, target: iqn.2018-11.com:BEAN, portal: 10.16.172.246,3260] Logout of [sid: 3, target: iqn.2018-11.com:BEAN, portal: 10.16.172.246,3260]: successful
登出之后,可以用iscsiadm -m session 检查效果。
root@node-242:~# iscsiadm -m session iscsiadm: No active sessions.
信息
一般来讲,登录target之后会新增一个盘符,登录之前,lsblk输出如下:
root@node2:~# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 30G 0 disk ├─sda1 8:1 0 7M 0 part ├─sda2 8:2 0 22.2G 0 part / ├─sda3 8:3 0 7.5G 0 part [SWAP] └─sda4 8:4 0 261M 0 part sdb 8:16 0 100G 0 disk ├─sdb1 8:17 0 8G 0 part └─sdb2 8:18 0 92G 0 part /data/osd.2 sdc 8:32 0 2T 0 disk sr0 11:0 1 1024M 0 rom
执行登录target之后:
root@node2:~# iscsiadm -m node -T iqn.2018-11.com:BEAN -p 10.16.172.246:3260 -l Logging in to [iface: default, target: iqn.2018-11.com:BEAN, portal: 10.16.172.246,3260] (multiple) Login to [iface: default, target: iqn.2018-11.com:BEAN, portal: 10.16.172.246,3260] successful. root@node2:~# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 30G 0 disk ├─sda1 8:1 0 7M 0 part ├─sda2 8:2 0 22.2G 0 part / ├─sda3 8:3 0 7.5G 0 part [SWAP] └─sda4 8:4 0 261M 0 part sdb 8:16 0 100G 0 disk ├─sdb1 8:17 0 8G 0 part └─sdb2 8:18 0 92G 0 part /data/osd.2 sdc 8:32 0 2T 0 disk sr0 11:0 1 1024M 0 rom
我们可以看到新增了一个sdc。
如果确定sdc和iSCSI target的关系呢:
iscsiadm -m session -P 3
比如之前的输出, sde这块磁盘即iSCSI,来自 10.16.172.247:3260的Target: iqn.2018-11.com:BEAN
root@node-242:~# iscsiadm -m session -P 3 iSCSI Transport Class version 2.0-870 version 2.0-871 Target: iqn.2018-11.com:BEAN Current Portal: 10.16.172.247:3260,1 Persistent Portal: 10.16.172.247:3260,1 ********** Interface: ********** Iface Name: default Iface Transport: tcp Iface Initiatorname: iqn.1993-08.org.debian:01:c9c12dd76e Iface IPaddress: 10.16.172.242 Iface HWaddress: (null) Iface Netdev: (null) SID: 2 iSCSI Connection State: LOGGED IN iSCSI Session State: LOGGED_IN Internal iscsid Session State: NO CHANGE ************************ Negotiated iSCSI params: ************************ HeaderDigest: None DataDigest: None MaxRecvDataSegmentLength: 262144 MaxXmitDataSegmentLength: 1048576 FirstBurstLength: 262144 MaxBurstLength: 1048576 ImmediateData: Yes InitialR2T: No MaxOutstandingR2T: 1 ************************ Attached SCSI devices: ************************ Host Number: 25 State: running scsi25 Channel 00 Id 0 Lun: 0 Attached scsi disk sde State: running
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