Re: Problems setting up iSCSI

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The 7d0023e73855a42ac25038403387ab41ca10753a version should be fine, it's what I use in my test environment. I really cannot explain why tcmu-runner is missing the rbd handler. I can only assume you have restarted the daemon after installing it. Any other log messages from tcmu-runner? Do you have a "/usr/lib64/tcmu-runner/handler_rbd.so" file? Perhaps enable debug-level logging in "/etc/tcmu/tcmu.conf" and see if that helps.

On Fri, Jun 29, 2018 at 11:40 AM Bernhard Dick <bernhard@xxxxxxxx> wrote:
Am 29.06.2018 um 17:26 schrieb Jason Dillaman:
> OK, so your tcmu-runner doesn't have support for rbd images for some
> reason. Where did you get your copy of tcmu-runner?
hm originally I took it from the gluster40 repository from the Centos
Storage SIG.
> You should build it
> from upstream or pull a copy from here [1].
>
> [1] https://shaman.ceph.com/repos/tcmu-runner/
I tried the version:
https://1.chacra.ceph.com/r/tcmu-runner/master/7d0023e73855a42ac25038403387ab41ca10753a/centos/7/flavors/default/x86_64/tcmu-runner-1.3.0-89.g7d0023e.el7.x86_64.rpm
(because the version number from the storage SIG was a 1.3.0-rc4 which
seemed a bit low). That resulted also in the error above.

Now I tried the version from
https://1.chacra.ceph.com/r/tcmu-runner/master/b7498c0857a77f61616b8ad86c775ae39f9c119d/centos/7/flavors/default/x86_64/
but the error persists.

I am however able to map and unmap the image on the host using rbd map
and unmap commands.

   Regards
     Bernhard
>
> On Fri, Jun 29, 2018 at 11:12 AM Bernhard Dick <bernhard@xxxxxxxx
> <mailto:bernhard@xxxxxxxx>> wrote:
>
>     Hi,
>
>     Am 29.06.2018 um 17:04 schrieb Jason Dillaman:
>      > Is 'tcmu-runner' running on that node?
>     yes it is running
>
>      > Any errors in dmesg or
>     here are no errors
>      > /var/log/tcmu-runner.log?
>     the following error is shown:
>     [ERROR] add_device:436: could not find handler for uio0
>
>         Regards
>           Bernhard
>      >
>      > On Fri, Jun 29, 2018 at 10:43 AM Bernhard Dick <bernhard@xxxxxxxx
>     <mailto:bernhard@xxxxxxxx>
>      > <mailto:bernhard@xxxxxxxx <mailto:bernhard@xxxxxxxx>>> wrote:
>      >
>      >     Hi,
>      >
>      >     Am 28.06.2018 um 18:09 schrieb Jason Dillaman:
>      >      > Do you have the ansible backtrace from the "ceph-iscsi-gw :
>      >     igw_lun |
>      >      > configureluns (create/map rbds and add to lio)]" step?
>      >     I assume you mean the following (from running with verbosity
>     3, after
>      >     running the purge-iscsi-gateways playbook beforehand)
>      >
>      >     Using module file /home/dick/git/ceph-ansible/library/igw_lun.py
>      >     <ovirt-test04> ESTABLISH SSH CONNECTION FOR USER: root
>      >     <ovirt-test04> SSH: EXEC ssh -o ControlMaster=auto -o
>      >     ControlPersist=600s -o StrictHostKeyChecking=no -o
>      >     KbdInteractiveAuthentication=no -o
>      >     PreferredAuthentications=gssapi-with-mic,g
>      >     ssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o
>      >     User=root -o ConnectTimeout=30 -o
>      >     ControlPath=/home/dick/.ansible/cp/%h-%r-%p ovirt-test04
>     '/bin/sh -c
>      >     '"'"'/usr/bin/p
>      >     ython && sleep 0'"'"''
>      >     <ovirt-test04> (1, '', 'Traceback (most recent call last):\n
>     File
>      >     "/tmp/ansible_F3sf6j/ansible_module_igw_lun.py", line 166, in
>      >     <module>\n
>      >          ansible_main()\n  File "/tmp/ansible_F3
>      >     sf6j/ansible_module_igw_lun.py", line 135, in ansible_main\n
>      >     lun.manage(desired_state)\n  File
>      >     "/usr/lib/python2.7/site-packages/ceph_iscsi_config/lun.py",
>     line 365,
>      >     in manage\n    self.allocate()\n  File "/u
>      >     sr/lib/python2.7/site-packages/ceph_iscsi_config/lun.py",
>     line 490, in
>      >     allocate\n    lun = self.add_dev_to_lio()\n  File
>      >     "/usr/lib/python2.7/site-packages/ceph_iscsi_config/lun.py",
>     line 683,
>      >     in add_dev_to_lio\n
>      >           wwn=in_wwn, control=control_string)\n  File
>      >     "/usr/lib/python2.7/site-packages/rtslib_fb/tcm.py", line 818, in
>      >     __init__\n    self._configure(config, size, wwn, hw_max_sectors,
>      >     control)\n  File "/usr/lib/pytho
>      >     n2.7/site-packages/rtslib_fb/tcm.py", line 836, in _configure\n
>      >     self._enable()\n  File
>      >     "/usr/lib/python2.7/site-packages/rtslib_fb/tcm.py", line 172, in
>      >     _enable\n    fwrite(path, "1\\n")\n  File "/usr/lib/pyt
>      >     hon2.7/site-packages/rtslib_fb/utils.py", line 79, in fwrite\n
>      >     file_fd.write(str(string))\nIOError: [Errno 2] No such file or
>      >     directory\n')
>      >     The full traceback is:
>      >     Traceback (most recent call last):
>      >         File "/tmp/ansible_F3sf6j/ansible_module_igw_lun.py",
>     line 166, in
>      >     <module>
>      >           ansible_main()
>      >         File "/tmp/ansible_F3sf6j/ansible_module_igw_lun.py",
>     line 135, in
>      >     ansible_main
>      >           lun.manage(desired_state)
>      >         File
>     "/usr/lib/python2.7/site-packages/ceph_iscsi_config/lun.py",
>      >     line 365, in manage
>      >           self.allocate()
>      >         File
>     "/usr/lib/python2.7/site-packages/ceph_iscsi_config/lun.py",
>      >     line 490, in allocate
>      >           lun = self.add_dev_to_lio()
>      >         File
>     "/usr/lib/python2.7/site-packages/ceph_iscsi_config/lun.py",
>      >     line 683, in add_dev_to_lio
>      >           wwn=in_wwn, control=control_string)
>      >         File "/usr/lib/python2.7/site-packages/rtslib_fb/tcm.py",
>     line 818,
>      >     in __init__
>      >           self._configure(config, size, wwn, hw_max_sectors, control)
>      >         File "/usr/lib/python2.7/site-packages/rtslib_fb/tcm.py",
>     line 836,
>      >     in _configure
>      >           self._enable()
>      >         File "/usr/lib/python2.7/site-packages/rtslib_fb/tcm.py",
>     line 172,
>      >     in _enable
>      >           fwrite(path, "1\n")
>      >         File
>     "/usr/lib/python2.7/site-packages/rtslib_fb/utils.py", line
>      >     79,
>      >     in fwrite
>      >           file_fd.write(str(string))
>      >     IOError: [Errno 2] No such file or directory
>      >
>      >     failed: [ovirt-test04] (item={u'host': u'ovirt-test04', u'image':
>      >     u'iscsi2342', u'state': u'present', u'pool': u'rbd', u'size':
>      >     u'1G'}) => {
>      >           "changed": false,
>      >           "item": {
>      >               "host": "ovirt-test04",
>      >               "image": "iscsi2342",
>      >               "pool": "rbd",
>      >               "size": "1G",
>      >               "state": "present"
>      >           },
>      >           "module_stderr": "Traceback (most recent call last):\n
>     File
>      >     \"/tmp/ansible_F3sf6j/ansible_module_igw_lun.py\", line 166, in
>      >     <module>\n    ansible_main()\n  File
>      >     \"/tmp/ansible_F3sf6j/ansible_module_igw_lun.
>      >     py\", line 135, in ansible_main\n   
>     lun.manage(desired_state)\n  File
>      >   
>       \"/usr/lib/python2.7/site-packages/ceph_iscsi_config/lun.py\", line
>      >     365,
>      >     in manage\n    self.allocate()\n  File
>     \"/usr/lib/python2.7/site-pa
>      >     ckages/ceph_iscsi_config/lun.py\", line 490, in allocate\n   
>     lun =
>      >     self.add_dev_to_lio()\n  File
>      >   
>       \"/usr/lib/python2.7/site-packages/ceph_iscsi_config/lun.py\", line
>      >     683,
>      >     in add_dev_to_lio\n    wwn=in_wwn, contr
>      >     ol=control_string)\n  File
>      >     \"/usr/lib/python2.7/site-packages/rtslib_fb/tcm.py\", line
>     818, in
>      >     __init__\n    self._configure(config, size, wwn, hw_max_sectors,
>      >     control)\n  File \"/usr/lib/python2.7/site-packages
>      >     /rtslib_fb/tcm.py\", line 836, in _configure\n   
>     self._enable()\n
>      >     File
>      >     \"/usr/lib/python2.7/site-packages/rtslib_fb/tcm.py\", line
>     172, in
>      >     _enable\n    fwrite(path, \"1\\n\")\n  File
>     \"/usr/lib/python2.7/site-
>      >     packages/rtslib_fb/utils.py\", line 79, in fwrite\n
>      >     file_fd.write(str(string))\nIOError: [Errno 2] No such file or
>      >     directory\n",
>      >           "module_stdout": "",
>      >           "msg": "MODULE FAILURE",
>      >           "rc": 1
>      >     }
>      >
>      >      > Have you tried
>      >      > using the stock v4.16 kernel (no need to use the one on
>     shaman)?
>      >     I have also used the v4.17.2-1.el7.elrepo.x86_64 elrepo
>     kernel, having
>      >     the same result.
>      >
>      >         Regards
>      >           Bernhard
>      >      >
>      >      > On Thu, Jun 28, 2018 at 11:29 AM Bernhard Dick
>     <bernhard@xxxxxxxx <mailto:bernhard@xxxxxxxx>
>      >     <mailto:bernhard@xxxxxxxx <mailto:bernhard@xxxxxxxx>>
>      >      > <mailto:bernhard@xxxxxxxx <mailto:bernhard@xxxxxxxx>
>     <mailto:bernhard@xxxxxxxx <mailto:bernhard@xxxxxxxx>>>> wrote:
>      >      >
>      >      >     Hi Jason,
>      >      >
>      >      >     Am 28.06.2018 um 14:33 schrieb Jason Dillaman:
>      >      >      > You should have
>     "/var/log/ansible-module-igw_config.log"
>      >     on the
>      >      >     target
>      >      >      > machine that hopefully includes more information
>     about why the
>      >      >     RBD image
>      >      >      > is missing from the TCM backend.
>      >      >     I have the logfile, however there everything seems
>     fine. The last
>      >      >     lines are:
>      >      >     2018-06-28 17:25:36,876 igw_lun.py DEBUG    : Check
>     the rbd
>      >     image size
>      >      >     matches the request
>      >      >     2018-06-28 17:25:36,904 igw_lun.py DEBUG    : rbd image
>      >     rbd.iscsi2342
>      >      >     size matches the configuration file request
>      >      >     2018-06-28 17:25:36,904 igw_lun.py DEBUG    : Begin
>      >     processing LIO
>      >      >     mapping
>      >      >     2018-06-28 17:25:36,905 igw_lun.py INFO     :
>      >     (LUN.add_dev_to_lio)
>      >      >     Adding image 'rbd.iscsi2342' to LIO
>      >      >     2018-06-28 17:25:36,905 igw_lun.py DEBUG    :
>      >      >     control="max_data_area_mb=8"
>      >      >
>      >      >         Regards
>      >      >           Bernhard
>      >      >
>      >      >      > In the past, I've seen issues w/ image
>      >      >      > features and image size mismatch causing the
>     process to abort
>      >      >      >
>      >      >      > On Thu, Jun 28, 2018 at 5:57 AM Bernhard Dick
>      >     <bernhard@xxxxxxxx <mailto:bernhard@xxxxxxxx>
>     <mailto:bernhard@xxxxxxxx <mailto:bernhard@xxxxxxxx>>
>      >      >     <mailto:bernhard@xxxxxxxx <mailto:bernhard@xxxxxxxx>
>     <mailto:bernhard@xxxxxxxx <mailto:bernhard@xxxxxxxx>>>
>      >      >      > <mailto:bernhard@xxxxxxxx
>     <mailto:bernhard@xxxxxxxx> <mailto:bernhard@xxxxxxxx
>     <mailto:bernhard@xxxxxxxx>>
>      >     <mailto:bernhard@xxxxxxxx <mailto:bernhard@xxxxxxxx>
>     <mailto:bernhard@xxxxxxxx <mailto:bernhard@xxxxxxxx>>>>> wrote:
>      >      >      >
>      >      >      >     Hi,
>      >      >      >
>      >      >      >     I'm trying to setup iSCSI using ceph-ansible
>     (stable-3.1)
>      >      >     branch with
>      >      >      >     one iscsi gateway. The Host is a CentOS 7 host
>     and I
>      >     use the
>      >      >     packages
>      >      >      >     from the Centos Storage SIG for luminous.
>     Additionally
>      >     I have
>      >      >     installed:
>      >      >      >     ceph-iscsi-cli Version 2.7 Release 13.gb9e48a7.el7
>      >      >      >     ceph-iscsi-config Version 2.6 Release
>     15.ge016c6f.el7
>      >      >      >     from the iscsi project at shaman.ceph.com
>     <http://shaman.ceph.com>
>      >     <http://shaman.ceph.com>
>      >      >     <http://shaman.ceph.com> <http://shaman.ceph.com>.
>      >      >      >     The python-rtslib version on the host is
>     2.1.fb67 Release
>      >      >     10.g7713d1e
>      >      >      >     also from shaman. The running kernel version is
>      >      >      >     4.15.0-ceph-g1c778f43da52.
>      >      >      >     The ansible process stops at TASK [ceph-iscsi-gw :
>      >     igw_lun |
>      >      >     configure
>      >      >      >     luns (create/map rbds and add to lio)] complaining
>      >     about file
>      >      >     not found
>      >      >      >     while caused by the self._enable function in
>     tcm.py.
>      >     That is
>      >      >     due to the
>      >      >      >     directory /sys/kernel/config/target/core/user_0/ is
>      >      >     completely missing
>      >      >      >     at this step.
>      >      >      >     Do you have any ideas how to fix or debug this
>     further?
>      >      >      >
>      >      >      >         Regards
>      >      >      >           Bernhard
>      >      >      >     _______________________________________________
>      >      >      >     ceph-users mailing list
>      >      >      > ceph-users@xxxxxxxxxxxxxx
>     <mailto:ceph-users@xxxxxxxxxxxxxx>
>      >     <mailto:ceph-users@xxxxxxxxxxxxxx
>     <mailto:ceph-users@xxxxxxxxxxxxxx>>
>     <mailto:ceph-users@xxxxxxxxxxxxxx <mailto:ceph-users@xxxxxxxxxxxxxx>
>      >     <mailto:ceph-users@xxxxxxxxxxxxxx
>     <mailto:ceph-users@xxxxxxxxxxxxxx>>>
>      >      >     <mailto:ceph-users@xxxxxxxxxxxxxx
>     <mailto:ceph-users@xxxxxxxxxxxxxx>
>      >     <mailto:ceph-users@xxxxxxxxxxxxxx
>     <mailto:ceph-users@xxxxxxxxxxxxxx>>
>     <mailto:ceph-users@xxxxxxxxxxxxxx <mailto:ceph-users@xxxxxxxxxxxxxx>
>      >     <mailto:ceph-users@xxxxxxxxxxxxxx
>     <mailto:ceph-users@xxxxxxxxxxxxxx>>>>
>      >      >      > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>      >      >      >
>      >      >      >
>      >      >      >
>      >      >      > --
>      >      >      > Jason
>      >      >
>      >      >
>      >
>      >
>      >
>      > --
>      > Jason
>
>
>
> --
> Jason


--
Dipl.-Inf. Bernhard Dick
Auf dem Anger 24
DE-46485 Wesel
www.BernhardDick.de

jabber: bernhard@xxxxxxxxxxxxxxx

Tel : +49.2812068620
Mobil : +49.1747607927
FAX : +49.2812068621
USt-IdNr.: DE274728845


--
Jason
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