OpenNebula

Getting a VM image from an http server fails with the following error in the VM's log

Thu Jun 25 10:47:07 2009 [TM][I]: tm_clone.sh: Downloading http://server.web/sl53base.img
Thu Jun 25 10:47:07 2009 [TM][I]: tm_clone.sh: ERROR: Command "ssh host wget -O /usr/local/one/var//23/images/disk.0 //server.web/sl53base.img" failed.
Thu Jun 25 10:47:07 2009 [TM][I]: tm_clone.sh: ERROR: //server.web/sl53base.img: Unsupported scheme.
Thu Jun 25 10:47:07 2009 [TM][E]: Error excuting image transfer script: //server.web/sl53base.img: Unsupported scheme.
Thu Jun 25 10:47:07 2009 [DiM][I]: New VM state is FAILED

tm_clone.sh splits the source location ($SRC) at the colon into two parts, $SRC_HOST and $SRC_PATH. ($SRC=http://server.web/file -> $SRC_HOST=http $SRC_PATH=//server.web/file) For a scp transfer this is valid but for a http transfer it breaks the url into two invalid pieces. Since wget receives an invalid url starting with // the transfer fails.

Line 49 of $ONE_LOCATION/lib/tm_commands/ssh/tm_clone.sh should read
exec_and_log "ssh $DST_HOST wget -O $DST_PATH $SRC"
rather than
exec_and_log "ssh $DST_HOST wget -O $DST_PATH $SRC_PATH"

While this is not a key feature of OpenNebula it is a very simple fix.