oracle gi 使用 iscsi 實現共享儲存

os: centos 6.8

在不太容易實現共享儲存的地方,可以通過iscsi輕易實現.

只是生產環境慎用.

iscsi 分為 target(server) 和 initiator(client)

資訊如下:

192.168.56.102 nodea2

# yum install gcc gcc-c++ # cd /lib/modules/2.6.32-754.11.1.el6.x86_64/ # ln -s ../../../usr/src/kernels/2.6.32-754.11.1.el6.x86_64 build # cd /opt # wget # tar zxvf iscsitarget-1.4.20.2.tar.gz # cd iscsitarget-1.4.20.2 # make

# make install

# ls -l /etc/init.d/ |grep -i scsi -rwxr-xr-x 1 root root 4535 jun 10 2017 iscsi -rwxr-xr-x 1 root root 3990 jun 10 2017 iscsid -rwxr-xr-x 1 root root 1430 may 23 11:42 iscsi-target # /etc/init.d/iscsi status iscsi is stopped # /etc/init.d/iscsid status iscsid is stopped # /etc/init.d/iscsi-target status iscsi target stopped # chkconfig --list |grep -i iscsi iscsi 0:off 1:off 2:off 3:on 4:on 5:on 6:off iscsid 0:off 1:off 2:off 3:on 4:on 5:on 6:off

# chkconfig iscsi-target on

target 上掛載磁碟

# fdisk -l disk /dev/vdb: 536.9 gb, 536870912000 bytes disk /dev/vdc: 214.7 gb, 214748364800 bytes disk /dev/vdd: 322.1 gb, 322122547200 bytes disk /dev/vde: 547.6 gb, 547608330240 bytes disk /dev/vdf: 225.5 gb, 225485783040 bytes disk /dev/vdg: 332.9 gb, 332859965440 bytes # cd /etc/iet # cp targets.allow targets.allow.bak # vi targets.allow all 192.168.56.0/24 # cp initiators.allow initiators.allow.bak # vi initiators.allow iqn.2019-05.com.example:sharedisk.uatclustera 192.168.56.101, 192.168.56.102 iqn.2019-05.com.example:sharedisk.uatclusterb 192.168.56.101, 192.168.56.102 # cp ietd.conf ietd.conf.bak # vi ietd.conf target iqn.2019-05.com.example:sharedisk.uatclustera lun 0 path=/dev/vdb,type=fileio,iomode=wb lun 1 path=/dev/vdc,type=fileio,iomode=wb lun 2 path=/dev/vdd,type=fileio,iomode=wb target iqn.2019-05.com.example:sharedisk.uatclusterb lun 0 path=/dev/vde,type=fileio,iomode=wb lun 1 path=/dev/vdf,type=fileio,iomode=wb lun 2 path=/dev/vdg,type=fileio,iomode=wb # /etc/init.d/iscsi-target start

# dmesg

檢視當前伺服器 iscsi target 服務以及連線狀態命令

# cat /proc/net/iet/session tid:2 name:iqn.2019-05.com.example:sharedisk.uatclusterb

tid:1 name:iqn.2019-05.com.example:sharedisk.uatclustera

檢視當前虛擬單元清單。

# cat /proc/net/iet/volume tid:2 name:iqn.2019-05.com.example:sharedisk.uatclusterb lun:0 state:0 iotype:fileio iomode:wb blocks:1069547520 blocksize:512 path:/dev/vde lun:1 state:0 iotype:fileio iomode:wb blocks:440401920 blocksize:512 path:/dev/vdf lun:2 state:0 iotype:fileio iomode:wb blocks:650117120 blocksize:512 path:/dev/vdg tid:1 name:iqn.2019-05.com.example:sharedisk.uatclustera lun:0 state:0 iotype:fileio iomode:wb blocks:1048576000 blocksize:512 path:/dev/vdb lun:1 state:0 iotype:fileio iomode:wb blocks:419430400 blocksize:512 path:/dev/vdc

lun:2 state:0 iotype:fileio iomode:wb blocks:629145600 blocksize:512 path:/dev/vdd

較好的方案是在 target 端設定 /etc/iet/targets.allow 和 /etc/iscsi/iscsid.conf 密碼

# yum install iscsi-initiator-utils-* # systemctl status iscsid; systemctl status iscsi; # systemctl start iscsi # systemctl enable iscsid;

systemctl enable iscsi;

檢視目前連線狀態

# iscsiadm -m session

探測某台機器的target

# iscsiadm -m discovery -t sendtargets -p 192.168.56.90 # ll -r /var/lib/iscsi/nodes/

# cd /var/lib/iscsi/nodes/

刪除不需要掛載的 target(或者在 target 端設定 targets.allow)

掛載到本地

# iscsiadm -m node # iscsiadm -m node -t iqn.2019-05.com.example:sharedisk.uatclustera -p 192.168.56.90 --login

# lsblk

退出登陸

# iscsiadm -m node -t iqn.2019-05.com.example:sharedisk.uatclustera --logout

刪除登陸資料

# iscsiadm -m node -t iqn.2019-05.com.example:sharedisk.uatclustera -o delete

如果 target 端設定了密碼，那麼 initiator 端也要設定相應的登陸密碼

# vi /etc/iscsi/iscsid.conf

啟動、停止、重啟iscsi-target 服務

/etc/init.d/iscsi-target start

/etc/init.d/iscsi-target stop

/etc/init.d/iscsi-target restart

參考:

oracle gi 使用 iscsi 實現共享儲存

使用linux連線ISCSI

ISCSI部署及使用

CentOS7 ISCSI簡單使用

oracle gi 使用 iscsi 實現共享儲存

使用linux連線ISCSI

ISCSI部署及使用

CentOS7 ISCSI簡單使用

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