QEMU interface introspection: From hacks to solutions Markus Armbruster <
[email protected]> KVM Forum 2015 Part I What’s the problem? Interfacing with QEMU QEMU provides interfaces QMP Monitor Command line to management applications like libvirt QEMU evolves rapidly Many interface versions Our command line is big In v2.4: 139 total options -14 deprecated -2 internal use 123 supported options 0.57kg If I had a coin for each of them. It’s big: output of -help QEMU emulator version 2.3.93, Copyright (c) 2003-2008 Fabrice Bellard -alt-grab use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt) configure a network backend to connect to another network -incoming rdma:host:port[,ipv4][,ipv6] usage: upstream-qemu [options] [disk_image] -ctrl-grab use Right-Ctrl to grab mouse (instead of Ctrl-Alt) using an UDP tunnel -incoming unix:socketpath -no-quit disable SDL window close capability -netdev vhost-user,id=str,chardev=dev[,vhostforce=on|off] prepare for incoming migration, listen on ’disk_image’ is a raw hard disk image for IDE hard disk 0 -sdl enable SDL configure a vhost-user network, backed by a chardev ’dev’ specified protocol and socket address -spice [port=port][,tls-port=secured-port][,x509-dir=<dir>] -netdev hubport,id=str,hubid=n -incoming fd:fd Standard options: [,x509-key-file=<file>][,x509-key-password=<file>] configure a hub port on QEMU VLAN ’n’ -incoming exec:cmdline -h or -help display this help and exit [,x509-cert-file=<file>][,x509-cacert-file=<file>] -net nic[,vlan=n][,macaddr=mac][,model=type][,name=str][,addr=str][,vectors=v]