配置使用iscsi
请确保服务器A上已经关闭了防火墙或者允许了3260端口。下图描述了使用iSCSI的大致过程,后文内容虽然因为介绍各种用法而显得比较杂,但根据这张图的流程,阅读时很容易搞清楚相关内容。
gtadm是一个高度模式化的命令,他们的模式很相近。有三个模式:target、logicalunit、account。指定模式时使用--mode选项。再使用--op来指定对应模式下的选项。另外,使用-lld指定driver,有两种driver:iscsi和iser,基本都会使用iscsi。
tgtadm --help
--lld <driver> --mode target --op new --tid <id> --targetname <name>
add a new target with <id> and <name>. <id>
must not be zero.
--lld <driver> --mode target --op delete [--force] --tid <id>
delete the specific target with <id>.
With force option, the specific target is
deleted even if there is an activity.
--lld <driver> --mode target --op show
show all the targets.
--lld <driver> --mode target --op show --tid <id>
show the specific target's parameters.
--lld <driver> --mode target --op update --tid <id> --name <param> --value <value>
change the target parameters of the specific
target with <id>.
--lld <driver> --mode target --op bind --tid <id> --initiator-address <address>
--lld <driver> --mode target --op bind --tid <id> --initiator-name <name>
enable the target to accept the specific initiators.
--lld <driver> --mode target --op unbind --tid <id> --initiator-address <address>
--lld <driver> --mode target --op unbind --tid <id> --initiator-name <name>
disable the specific permitted initiators.
--lld <driver> --mode logicalunit --op new --tid <id> --lun <lun> \
--backing-store <path> --bstype <type> --bsoflags <options>
add a new logical unit with <lun> to the specific
target with <id>. The logical unit is offered
to the initiators. <path> must be block device files
(including LVM and RAID devices) or regular files.
bstype option is optional.
bsoflags supported options are sync and direct
(sync:direct for both).
--lld <driver> --mode logicalunit --op delete --tid <id> --lun <lun>
delete the specific logical unit with <lun>
that the target with <id> has.
--lld <driver> --mode account --op new --user <name> --password <pass>
add a new account with <name> and <pass>.
--lld <driver> --mode account --op delete --user <name>
delete the specific account having <name>.
--lld <driver> --mode account --op bind --tid <id> --user <name> [--outgoing]
add the specific account having <name> to
the specific target with <id>.
<user> could be <IncomingUser> or <OutgoingUser>.
If you use --outgoing option, the account will be
added as an outgoing account.
--lld <driver> --mode account --op unbind --tid <id> --user <name>
delete the specific account having <name> from
specific target.
--control-port <port> use control port <port>
上表中的选项都是长格式的,但他们都有对应的短格式选项。
tgt-admin是读取配置文件的选项然后调用tgtadm来执行的工具。它的选项很多可以简化tgtadm命令的书写,毕竟tgtadm的选项太长太多余了,除此之外也有一些其他的作用用于更细致的配(tgtadm配置的太粗糙了)。用法如下: