search for: libguestfs9gclsg

...:raw" "protocol:rbd" "server:tcp:[fd00::cefc:1]:6789" libguestfs: creating COW overlay to protect original drive content libguestfs: trace: get_tmpdir libguestfs: trace: get_tmpdir = "/root/libguestfs/tmp" libguestfs: trace: disk_create "/root/libguestfs/tmp/libguestfs9gclsg/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: qemu-img libguestfs: command: run: \ create libguestfs: command: run: \ -f qc...

I believe the bug lies in libguestfs. Taking out the commands being sent to QEMU and using qemu-img info I can recreate the error: # qemu-img info "rbd:images/CentOS-7-x86_64-GenericCloud-1901:mon_host=[fd00::cefc:1]\:6789:auth_supported=none" qemu-img: Could not open 'rbd:images/CentOS-7-x86_64-GenericCloud-1901:mon_host=[fd00::cefc:1]\:6789:auth_supported=none': invalid