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[James Page <james.page@xxxxxxxxxx>]

Snippet from qemu:

static void raw_parse_flags(int bdrv_flags, int *open_flags)
{
    assert(open_flags != NULL);

    *open_flags |= O_BINARY;
    *open_flags &= ~O_ACCMODE;
    if (bdrv_flags & BDRV_O_RDWR) {
        *open_flags |= O_RDWR;
    } else {
        *open_flags |= O_RDONLY;
    }

    /* Use O_DSYNC for write-through caching, no flags for write-back caching,
     * and O_DIRECT for no caching. */
    if ((bdrv_flags & BDRV_O_NOCACHE)) {
        *open_flags |= O_DIRECT;
    }
}

no-cache == use O_DIRECT.

** Project changed: nova => charm-test-infra

** Changed in: charm-test-infra
   Importance: Undecided => Low

** Changed in: charm-test-infra
       Status: Confirmed => Triaged

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https://bugs.launchpad.net/bugs/1710994

Title:
  Openstack Pike + LXD with ZFS -  cannot convert image to raw

Status in OpenStack Charm Test Infra:
  Triaged

Bug description:
  Deploying Pike on arm64 - during instance creation nova reports the
  following error:

  fault                                | {"message": "Build of instance 3460a1bc-72ac-4d43-a232-d150161c2447 aborted: Image b81b08c8-2487-4fea-b39a-d9b07b75b2f0 is unacceptable: Unable to convert image to raw: Image /var/lib/nova/instances/_base/43dbc7beed2459ae424c6b889caf7854f26321e5.part is unacceptable: ", "code": 500, "details": "  File \"/usr/lib/python2.7/dist-packages/nova/compute/manager.py\", line 1785, in _do_build_and_run_instance |
  |                                      |     filter_properties)                                                                                                                                                                                                                                                                                                                                                                                                |
  |                                      |   File \"/usr/lib/python2.7/dist-packages/nova/compute/manager.py\", line 2007, in _build_and_run_instance                                                                                                                                                                                                                                                                                                            |

  Further investigation of nova-compute logs reveals:

  Unable to convert image to raw: Unexpected error while running command.
  Command: qemu-img convert -t none -O raw -f qcow2 /var/lib/nova/instances/_base/f8488b6e96eb7e752a6d2aa046a8de693c06a5fd.part /var/lib/nova/instances/_base/f8488b6e96eb7e752a6d2aa046a8de693c06a5fd.converted
  Exit code: 1
  Stdout: u''
  Stderr: u"qemu-img: file system may not support O_DIRECT\nqemu-img: Could not open '/var/lib/nova/instances/_base/f8488b6e96eb7e752a6d2aa046a8de693c06a5fd.converted': Could not open '/var/lib/nova/instances/_base/f8488b6e96eb7e752a6d2aa046a8de693c06a5fd.converted': Invalid argument\n"

  Full log:

  https://pastebin.canonical.com/195965/

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