Re: iSCSI

Prasanna Kalever <pkalever@xxxxxxxxxx> · Fri, 8 Jul 2016 17:43:20 +0530

Hi Francis,

The tcmu-runner is not available as a pre built package in Ubuntu distro, so you need to build it on your own, honestly I have not tried this on my own but the suggested solution should solve it for you.

glfs is supported from initial version of tcmu-runner, so you can take up any latest version of it.

perform cmake . -Dwith-glfs=true followed by make 

that's not all, you need to manually copy the systemd unit files (tcmu-runner.sevice) the respective directives and copy the handlers (in our case 'handler_glfs.so' to /usr/lib/tcmu-runner/) and other required conf files

take a look at the fedora rpm spec, which should be a way to follow
[...]
%install                                                                         
make install DESTDIR=%{buildroot}                                                
mkdir -p %{buildroot}%{_mandir}/man8/                                            
install -m 644 tcmu-runner.8.gz %{buildroot}%{_mandir}/man8/                     

%post -n libtcmu -p /sbin/ldconfig                                               

%postun -n libtcmu -p /sbin/ldconfig                                             

%files                                                                           
%{_bindir}/tcmu-runner                                                           
%dir %{_libdir}/tcmu-runner                                                      
%{_libdir}/tcmu-runner/*                                                         
%{_sysconfdir}/dbus-1/system.d/tcmu-runner.conf                                  
%{_datarootdir}/dbus-1/system-services/org.kernel.TCMUService1.service           
%{_unitdir}/tcmu-runner.service                                                  
%doc README.md                                                                   
%license LICENSE                                                                 
%{_mandir}/man8/tcmu-runner.8.gz                                                 

%files -n libtcmu                                                                
%{_libdir}/*.so.*                                                                

%files -n libtcmu-devel                                                          
%{_includedir}/libtcmu.h                                                         
%{_includedir}/libtcmu_common.h                                                  
%{_libdir}/*.so           
[...]

list of things you need to do:
1. do the path changes in the systemd unit file tcmu-runner.service and copy it to /lib/systemd/system/
2. copy the libraries to respective paths
3. mkdir and copy handler_glfs.so to /usr/lib/tcmu-runner
4. copy the tcmu-runner.conf   to /etc/dbus-1/system.d/
5. copy org.kernel.TCMUService1.service to /etc/dbus-1/system-services/
6. make sure target_core_user is loaded and target.service is running
7. run systemctl start tcmu-runner.servie

Hopefully that should work!

Looking forward for your update.

Cheers, 
--
Prasanna

On Fri, Jul 8, 2016 at 3:51 AM, francis Lavalliere <francis.lavalliere@xxxxxxxxx> wrote:
Hello,
I've been messing around with Gluster FS version 3.7 and 3.8.

Currently i am trying to implement iSCSI with Gluster FS.

I've installed ubuntu 16.04 and have installed various components:

I didnt found any tcmu-runner packages for ubuntu, so i manually built it using their git repository:

I've tried : cmake . -Dwith-glfs=true  and successfully installed it using make/make install..

when I do : targetcli ls  i do not see the output of the user:glfs

Here is an example of the output. I've managed to do it via fileio, but this is not the right way.
targetcli ls
o- / ......................................................................................................................... [...]
  o- backstores .............................................................................................................. [...]
  | o- fileio ................................................................................................... [1 Storage Object]
  | | o- testfs .................................................................................. [711.0M, /nfs/testfs.img, in use]
  | o- iblock ................................................................................................... [0 Storage Object]
  | o- pscsi .................................................................................................... [0 Storage Object]
  | o- rd_mcp ................................................................................................... [0 Storage Object]
  o- ib_srpt ........................................................................................................... [0 Targets]
  o- iscsi .............................................................................................................. [1 Target]
  | o- iqn.2015-04.com.example:target1 ..................................................................................... [1 TPG]
  |   o- tpg1 ............................................................................................................ [enabled]
  |     o- acls ........................................................................................................... [0 ACLs]
  |     o- luns ............................................................................................................ [1 LUN]
  |     | o- lun0 ................................................................................ [fileio/testfs (/nfs/testfs.img)]
  |     o- portals ...................................................................................................... [1 Portal]
  |       o- 0.0.0.0:3260 ....................................................................................... [OK, iser enabled]
  o- loopback .......................................................................................................... [0 Targets]
  o- qla2xxx ........................................................................................................... [0 Targets]
  o- tcm_fc ............................................................................................................ [0 Targets]
  o- usb_gadget ........................................................................................................ [0 Targets]

  o- vhost ............................................................................................................. [0 Targets]

Anyone would know how to make iSCSI target user:glfs show in the targetcli to be compatible with GlusterFS Directly?

Thank you.

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