Why cannot block copy local storage to network disk

wyang <w90p710@xxxxxxxxx> · Tue, 18 Jul 2017 18:06:45 +0800



    Hi, guys

    
      I was executing the
        following command to lively migrate local storage to network
        storage,
      
        [root@192-168-152-51
          ~]# virsh blockcopy a75056a4-44e0-4b97-bc77-78142ee17038 vda
          —xml rbd.xml —wait —verbose —pivot

          error: argument unsupported: non-file destination not
          supported yet
      
       but I get the
        following error:
      
        error: argument
          unsupported: non-file destination not supported yet
      
      I check my libvirt
        source code, and find the following code sniff in qemuDomainBlockCopyCommon
        function
          if (!virStorageSourceIsLocalStorage(mirror)) {
        virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                       _("non-file destination not supported yet"));
    }

      it was introduced by
        Eric.
      
        commit
          e53ee6c123321a1775ef3b36e15a5fa351d10fe4

          Author: Eric Blake eblake@xxxxxxxxxx

          Date: Fri Aug 29 16:30:46 2014 -0600
         blockcopy: tweak
          how rebase calls into copy
      
      So my question is
        that why we cannot block copy to network storage?
      
    
    Thanks

    Wei

    
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