Date: Mon, 14 Mar 2022 19:00:11 +0000 From: Michael Jung <mikej@paymentallianceintl.com> To: mike tancsa <mike@sentex.net>, freebsd-fs <freebsd-fs@freebsd.org> Subject: RE: ctl.conf / iscsi docs and best practices Message-ID: <76fdc117f673476189d3fd7a2424c76e@MAIL-HUB.pai.local> In-Reply-To: <108defea-700e-d1e0-e210-d32a8af5e8f0@sentex.net> References: <108defea-700e-d1e0-e210-d32a8af5e8f0@sentex.net>
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<html><head><style type=3D"text/css">.style1 {font-family: "Times New Roman=
";}</style></head><body>I just started working with the target again about =
a week ago, here is my setup.<BR>
<BR>
For two remote initiators to connect to the same target you need<BR>
option "ha shared" "on"<BR>
<BR>
Maybe this helps you a little.<BR>
<BR>
--mikej<BR>
<BR>
portal-group "pg0" {<BR>
discovery-auth-group "no-authentication"<BR>
listen "192.168.6.11:3260"<BR>
listen "[::]:3260"<BR>
option "ha_shared" "on"<BR>
}<BR>
<BR>
<BR>
auth-group "ag0" {<BR>
initiator-name "iqn.1998-01.com.vmware:hv1-3972eaf3"<BR>
initiator-name "iqn.1998-01.com.vmware:esxi2.mikej.local:98061=
3345:64"<BR>
initiator-name "iqn.1998-01.com.vmware:esxi3.mikej.local.:1805=
690011:64"<BR>
initiator-portal "192.168.6.8"<BR>
initiator-portal "192.168.6.14"<BR>
initiator-portal "192.168.6.5"<BR>
auth-type "none"<BR>
}<BR>
<BR>
<BR>
auth-group "ag1" {<BR>
initiator-name "iqn.1994-05.com.unitrends:60e2f1d15e57"<B=
R>
initiator-portal "192.168.6.9"<BR>
auth-type "none"<BR>
}<BR>
<BR>
<BR>
lun "esxi-store1" {<BR>
path "/dev/zvol/raid-5400-1/esxi-store1"<BR>
blocksize "512"<BR>
serial "YEAH RIGHT"<BR>
device-id "iSCSI Disk"<BR>
option "vendor" "MikeJ"<BR>
option "product" "iSCSI Disk"<BR>
option "revision" "0123"<BR>
option "naa" "0x6589cfc00000079e8a0d223e935440ab&quo=
t;<BR>
option "insecure_tpc" "on"<BR>
option "rpm" "1"<BR>
}<BR>
<BR>
lun "unitrends1" {<BR>
path "/dev/zvol/raid-5400-1/unitrends1"<BR>
blocksize "512"<BR>
serial "YEAH RIGHT"<BR>
device-id "iSCSI Disk"<BR>
option "vendor" "MikeJ"<BR>
option "product" "iSCSI Disk"<BR>
option "revision" "0123"<BR>
option "naa" "0x6589cfc00000079e8a0d223e935440ac&quo=
t;<BR>
option "insecure_tpc" "on"<BR>
option "rpm" "1"<BR>
}<BR>
<BR>
<BR>
<BR>
target "iqn.2005-10.org.mikej.ctl:esxi-store1" {<BR>
auth-group "ag0"<BR>
portal-group "pg0"<BR>
alias "esxi-store1"<BR>
lun "0" "esxi-store1"<BR>
}<BR>
<BR>
target "iqn.1994-05.com.unitrends:60e2f1d15e57" {<BR>
auth-group "ag1"<BR>
portal-group "pg0"<BR>
alias "unitrens11"<BR>
lun "1" "unitrends1"<BR>
}<BR>
<BR>
-----Original Message-----<BR>
From: <a href=3D"mailto:owner-freebsd-fs@freebsd.org">owner-freebsd-fs@free=
bsd.org</a> [mailto:owner-freebsd-fs@freebsd.org] On Behalf Of mike tancsa<=
BR>
Sent: Monday, March 14, 2022 2:48 PM<BR>
To: freebsd-fs <freebsd-fs@freebsd.org><BR>
Subject: ctl.conf / iscsi docs and best practices<BR>
<BR>
Looking at diving deeper into FreeBSD as an iscsi target and initiator, but=
more so as a target server. Looking at the handbook, there are not a lot =
of docs there and the sample ctl.conf entries dont really follow the style =
of the example ctl.conf file generated by something like TrueNAS. Are ther=
e any better FreeBSD docs out there ? Anyone have any decent go to docs aro=
und iscsi in general that are good primers as well ? My goal is to serve up=
storage for a bunch of Linux KVM initiators with the iscsi targets on Free=
BSD being zvols.<BR>
<BR>
e.g. in TrueNAS, I see it define a bunch of individual LUNs and then target=
s as so.<BR>
<BR>
lun "freebsd2" {<BR>
ctl-lun "1"<BR>
path "/dev/zvol/tankstripe/freebsd2"<BR>
blocksize "512"<BR>
serial "000743299890001"<BR>
device-id "iSCSI Disk 000743299890001 "<BR>
option "vendor" "TrueNAS"<BR>
option "product" "iSCSI Disk"<BR>
option "revision" "0123"<BR>
option "naa" "0x6589cfc000000c330e3ddde42a36408a&qu=
ot;<BR>
option "insecure_tpc" "on"<BR>
option "rpm" "1"<BR>
}<BR>
<BR>
lun "freebsd3" {<BR>
ctl-lun "2"<BR>
path "/dev/zvol/tankstripe/freebsd3"<BR>
blocksize "4096"<BR>
serial "000743299890002"<BR>
device-id "iSCSI Disk 000743299890002 "<BR>
option "vendor" "TrueNAS"<BR>
option "product" "iSCSI Disk"<BR>
option "revision" "0123"<BR>
option "naa" "0x6589cfc0000001cd46c021f21b31d0cc&qu=
ot;<BR>
option "insecure_tpc" "on"<BR>
option "rpm" "1"<BR>
}<BR>
<BR>
Then define more LUNs in the targets that reference the above LUNs<BR>
<BR>
target "iqn.2005-10.org.freenas.ctl:freebsd2" {<BR>
alias "freebsd2"<BR>
portal-group "pg1" "ag4tg2_2"<BR>
<BR>
lun "0" "freebsd2"<BR>
}<BR>
<BR>
target "iqn.2005-10.org.freenas.ctl:freebsd3" {<BR>
alias "freebsd3"<BR>
portal-group "pg1" "ag4tg3_3"<BR>
<BR>
lun "0" "freebsd3"<BR>
}<BR>
<BR>
<BR>
So the lun that refers to the block of storage also has a ctl-lun that seem=
s to be uniq. What is the purpose of that ? Same with serial #s and Device-=
IDs. Are these merely informational or are they a requirement for something=
?<BR>
<BR>
If multiple initiators are to have sessions to the target, with only one ac=
tively writing to it, are there any special options I need to set ?<BR>
<BR>
I also noticed in ctladm are several cache sync options. My go - to zfs re=
plication software is zrepl which has hooks that can be fired before and af=
ter a snapshot. Do I want to send some sort of cache flush command to the =
target ? Or is that the guest OS' responsibility to do a sync that that the=
snapshot is coherent as possible.<BR>
<BR>
Thanks for any pointers.<BR>
<BR>
---Mike<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
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