Re: Problems setting up iSCSI

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OK, so your tcmu-runner doesn't have support for rbd images for some reason. Where did you get your copy of tcmu-runner? You should build it from upstream or pull a copy from here [1].

[1] https://shaman.ceph.com/repos/tcmu-runner/

On Fri, Jun 29, 2018 at 11:12 AM Bernhard Dick <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>> 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>>> 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>>>> 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>.
>      >      >     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>>>
>      >      > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>      >      >
>      >      >
>      >      >
>      >      > --
>      >      > Jason
>      >
>      >
>
>
>
> --
> Jason



--
Jason
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