Hello Matthias, We encountered a similar issue, it turned out to be because we used another pool then rbd with gwcli. We got it fixed and it should be in a pull request upstream. /Heðin ----- Original Message ----- From: "Matthias Leopold" <matthias.leopold@xxxxxxxxxxxxxxxx> To: ceph-users@xxxxxxxxxxxxxx Sent: Thursday, 2 November, 2017 15:34:45 Subject: iSCSI: tcmu-runner can't open images? Hi, i'm trying to set up iSCSI gateways for a Ceph luminous cluster using these instructions: http://docs.ceph.com/docs/master/rbd/iscsi-target-cli/ When arriving at step "Configuring: Adding a RADOS Block Device (RBD)" things start to get messy: there is no "disks" entry in my target path, so i can't "cd /iscsi-target/iqn.2003-01.com.redhat.iscsi-gw:<target_name>/disks/". When i try to create a disk in the top level "/disks" path ("/disks> create pool=ovirt-default image=itest04 size=50g") gwcli crashes with "ValueError: No JSON object could be decoded" (there is more output when using debug but i don't think it matters). More interesting is /var/log/tcmu-runner.log, it says consistently [DEBUG] handle_netlink:207: cmd 1. Got header version 2. Supported 2. [DEBUG] dev_added:768 rbd/ovirt-default.itest04: Got block_size 512, size in bytes 53687091200 [DEBUG] tcmu_rbd_open:581 rbd/ovirt-default.itest04: tcmu_rbd_open config rbd/ovirt-default/itest04/osd_op_timeout=30 block size 512 num lbas 104857600. [DEBUG] timer_check_and_set_def:234 rbd/ovirt-default.itest04: The cluster's default osd op timeout(30.000000), osd heartbeat grace(20) interval(6) [DEBUG] timer_check_and_set_def:242 rbd/ovirt-default.itest04: The osd op timeout will remain the default value: 30.000000 [ERROR] tcmu_rbd_image_open:318 rbd/ovirt-default.itest04: Could not open image itest04/osd_op_timeout=30. (Err -2) [ERROR] add_device:496: handler open failed for uio0 in the moment of the crash. The funny thing is, the image is created in the ceph pool 'ovirt-default', only gwcli/tcmu-runner can't read it. The "/disks" path in gwcli and the "/backstores/user:rbd" path in targetcli are always empty. I haven't gotten past this, can anybody tell me what's wrong? I tried 2 different tcmu binaries, one self compiled from sources from https://github.com/open-iscsi/tcmu-runner/tree/v1.3.0-rc4, the other rpm binaries from https://shaman.ceph.com/repos/tcmu-runner/ (ID: 58311). The error is the same with both versions. My setup: - CentOS 7.4 - kernel 3.10.0-693.2.2.el7.x86_64 - iscsi gw co-located on a ceph OSD node - ceph programs from http://download.ceph.com/rpm-luminous - python-rtslib-2.1.fb64 installed with "pip install" - ceph-iscsi-config-2.3 installed as rpm compiled from https://github.com/ceph/ceph-iscsi-config/tree/2.3 - ceph-iscsi-cli-2.5 installed as rpm from https://github.com/ceph/ceph-iscsi-cli/tree/2.5 thx a lot for help matthias _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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