Re: Problems setting up iSCSI

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Is 'tcmu-runner' running on that node? Any errors in dmesg or /var/log/tcmu-runner.log?

On Fri, Jun 29, 2018 at 10:43 AM Bernhard Dick <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>> 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>>> 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>.
>      >     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>>
>      > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>      >
>      >
>      >
>      > --
>      > Jason
>
>


--
Jason
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