[Libguestfs] guestfish Remote Images IPv6 Support

[Richard W.M. Jones]

On Mon, Apr 01, 2019 at 08:45:48AM -0500, Jonathan Wright wrote:
> Unfortunately I do need to use the address explicitly as opposed to
> hostnames because the source of the data fed here is Ceph's monmap
> which returns the addresses explicitly.
> 
> I've tried all the common ways to escape the : in the v6 address to
> no avail.  I definitely agree that the problem looks to be it
> parsing the colons as if the port comes next and then everything
> after that is args.
> 
> Should I file a bug report?  There doesn't seem to be any way to
> prevent the : from getting parsed incorrectly.

Is it a bug in qemu?  Anyway yes if it's a bug please file
a bug report about it.

Rich.

> On 3/30/19 2:50 AM, Richard W.M. Jones wrote:
> >On Fri, Mar 29, 2019 at 06:17:17PM -0500, Jonathan Wright wrote:
> >>I have scoured the web and can't find anything on the topic: Is IPv6
> >>supported for remote image targets?
> >It definitely should work, although I don't know if anyone has tried
> >using the address explicitly (rather than a hostname which resolves to
> >an AAAA record).
> >
> >>For example:
> >>
> >>guestfish --format=raw --ro -a
> >>rbd://[fd00::cefc:1]:6789/images/CentOS-7-x86_64-GenericCloud-1901
> >>
> >>Does not work citing the following:
> >The important lines are these.  Firstly guestfish parses the URL into
> >an actual libguestfs API call, which looks fine to me:
> >
> >>libguestfs: trace: add_drive
> >>"images/CentOS-7-x86_64-GenericCloud-1901" "readonly:true"
> >>"format:raw" "protocol:rbd" "server:tcp:[fd00::cefc:1]:6789"
> >This is probably where it goes wrong:
> >
> >>"/tmp/libguestfs3pGMi6/overlay1.qcow2" "qcow2" -1 "backingfile:rbd:images/CentOS-7-x86_64-GenericCloud-1901:mon_host=[fd00::cefc:1]\:6789:auth_supported=none"
> >>"backingformat:raw"
> >>libguestfs: command: run: \ -o backing_file=rbd:images/CentOS-7-x86_64-GenericCloud-1901:mon_host=[fd00::cefc:1]\:6789:auth_supported=none,backing_fmt=raw
> >>libguestfs: command: run: \ /tmp/libguestfs3pGMi6/overlay1.qcow2
> >>qemu-img: /tmp/libguestfs3pGMi6/overlay1.qcow2: invalid conf option
> >>:cefc:1]:6789:auth_supported: No such file or directory
> >>Could not open backing image to determine size.
> >The code in libguestfs is supposed to turn the guestfs_add_drive
> >‘servers’ parameter into a Ceph URL for qemu:
> >
> >   https://github.com/libguestfs/libguestfs/blob/f79129b8dc92470e3a5597daf53c84038bd6859e/lib/qemu.c#L905
> >
> >and I suppose this is being done wrong somehow (I don't have a Ceph
> >server to test).
> >
> >At a guess I would say that it seems as if ':' characters must be
> >quoted somehow (backslash?) because they are also used to separate the
> >address and port number.
> >
> >Rich.
> >
> -- 
> Jonathan Wright
> KnownHost, LLC
> https://www.knownhost.com

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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