On 02/06/2018 04:52 AM, Daniel P. Berrangé wrote:
Consider passing a JSON based block driver to "qemu-img commit"

$ qemu-img commit 'json:{"driver":"qcow2","file":{"driver":"gluster",\
                   "volume":"gv0","path":"sn1.qcow2",
                   "server":[{"type":\
                  "tcp","host":"10.73.199.197","port":"24007"}]},}'

Currently it will commit the content and then report an incredibly
useless error message when trying to re-open the committed image:

   qemu-img: invalid URI
   Usage: 
file=gluster[+transport]://[host[:port]]volume/path[?socket=...][,file.debug=N][,file.logfile=/path/filename.log]

With this fix we get:

   qemu-img: invalid URI json:{"server.0.host": "10.73.199.197",
       "driver": "gluster", "path": "luks.qcow2", "server.0.type":
       "tcp", "server.0.port": "24007", "volume": "gv0"}

Of course the root cause problem still exists, but now we know
what actually needs fixing.

Signed-off-by: Daniel P. Berrangé <berra...@redhat.com>
---
  block/gluster.c  | 2 +-
  block/sheepdog.c | 2 +-
  2 files changed, 2 insertions(+), 2 deletions(-)

Reviewed-by: Eric Blake <ebl...@redhat.com>

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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