使用iSCSI协议实现Ceph提供块存储

admin

通过配置文件来创建 target
! r# ?0 B( z# rvim /etc/tgt/targets.conf
, Y$ J; O  p9 ?3 W& \
/ Q1 b; |3 _; @# |# Empty targets configuration file -- please see the package
3 H2 p3 X! U6 x% h+ F7 D# documentation directory for an example.
#
# You can drop individual config snippets into /etc/tgt/conf.d
+ P( C8 e* E  d3 Y2 U( J/ yinclude /etc/tgt/conf.d/*.conf
<target iqm.2021-7-02.rbd.com:compute01>
   driver iscsi
   bs-type rbd
   backing-store iscsitgtpool/imagerbd1
$ G: D! @2 L! {& j) H, ]! ?9 d</target>

如果有多个就写多个即可：
<target iqm.2021-7-02.rbd.com1:compute01>
) D2 }& L& K( [2 ^/ x5 O   driver iscsi
  `# D/ ]2 x% }   bs-type rbd
   backing-storerbdrac/imagerbd2
8 Y5 P8 z( e* O7 m</target>
% m% M  B: O6 H; w% s# |. V
! |! g4 v; L1 f* l( j" w重启tgtd服务：
7 n2 R0 E) l- g! f) h# S- r" ssystemctl restart tgtd.service

3 j0 R8 M: G; R3、        查看激活的 target
[root@compute01 ~]# tgtadm --lld iscsi --mode target --op show
, Z$ e$ g3 m+ c

admin

配置多路径：
* ~1 T# k8 D$ Y! A& t) }# yum install -y device-mapper-multipath
$ N6 n7 _% _+ I/ X4 C  g
% i) \- i1 k. r& _+ g, ^# cat > /etc/multipath.conf <<EOF
8 c; |: U: N/ Ddefaults {
user_friendly_names yes
udev_dir /dev
/ R* |$ Y6 o  g" `3 Q: f# Ppath_grouping_policy multibus
1 n" e* k, [6 _( U. d. u/ e0 dfailback immediate
- P' l# ^& |/ |% o+ Z8 S9 E* lno_path_retry fail
}
. I4 W$ _$ D  c7 B/ C' x% LEOF
3 ^1 t4 E  F+ E+ a7 M! `& k
设置开机启动：
systemctl enable multipathd.service
8 v, I+ O; }! e2 P0 s9 p# Nsystemctl restart multipathd.service

[root@iscsi ~]# multipath -ll
, z6 s7 J$ f: c7 m, V$ y0 DJul 02 13:47:18 | /etc/multipath.conf line 3, invalid keyword: udev_dir
2 }( l2 ^1 e, ^7 K7 I, J: Umpatha (360000000000000000e00000000010001) dm-2 IET     ,VIRTUAL-DISK   
size=10G features='0' hwhandler='0' wp=rw
" C7 X9 M0 a, e0 \; m% q! `4 r6 r`-+- policy='service-time 0' prio=1 status=active
5 C, i/ I/ v" |4 m& A, m- V4 H  |- 2:0:0:1 sda 8:0  active ready running
  |- 3:0:0:1 sdb 8:16 active ready running
7 [2 r; T5 v) f: y4 a: ~8 W. Q  `- 4:0:0:1 sdc 8:32 active ready running
! a( k7 n! _+ T' e2 @  w
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