Re: [Libguestfs] getting guestfs_rsync_out to work

>> Per this page >> >> https://rwmj.wordpress.com/2013/04/22/using-rsync-with-libguestfs/ >> >> We are trying to get the libguestfs API guestfs_rsync_out to work. We’ve tried combinations similar to: >> >> guestfs_rsync_out(g, “/HostShared”, “rsync://root@10.0.1.90:2999/backup/ -av”, -1) >> >> surrounding it with APIs as in the recipe examples, for example replacing libguestfs_cat(), with no luck. In the >> above >> example the "backup" rsync module name matches the script on Richard's wordpress.com blog page (above link). >> Typically in the rsync daemon log we see something like: >> >> receiving file list >> sent 17 bytes received 24 bytes total size 0 >> >> but no data is transferred. We are successful using rsync from the Linux command line, and we can get libguestfs >> APIs >> like guestfs_cat() to work fine. But we’ve had zero luck with rsync_out over the last week. > > I think it's really hard to diagnose problems without turning on > debugging in libguestfs: > > http://libguestfs.org/guestfs-faq.1.html#how-do-i-debug-when-using-the-api > >> Unfortunately there are no actual API examples online, no >> “recipes” on the libguestfs.org site, etc. Does anyone know >> where there are some actual libguestfs_rsync_out() working examples? > > The only example I can point to is this test: > > https://github.com/libguestfs/libguestfs/blob/master/tests/rsync/test-rsy... Thanks very much. In our example, the libguestfs API syntax required turns out to be: guestfs_rsync_out(g, "/Win7Folder", "rsync://root@10.0.1.90:2999/backup", GUESTFS_RSYNC_OUT_ARCHIVE, 1, -1) This produces a trace result: libguestfs: trace: rsync_out "/Win7Folder" "rsync://root@10.0.1.90:2999/backup" "archive:true" Also, to avoid chgrp and other permission related messages, we had to add: uid = 0 gid = 0 in our rsyncd.conf file (we are running rsync daemaon as root). Now we are testing guestfs_rsync_out() in a loop that runs every 1 sec. We hope to achieve continuous synchronization with a live Win7 guest. As I mentioned before, we're only reading from the Win7 guest, and not a lot of data is involved, maybe a few files up to 50 MByte. These files are not changing size, just contents.