Best Regards, Robert Hoo
> -----Original Message----- > From: Michael Roth [mailto:mdr...@linux.vnet.ibm.com] > Sent: Wednesday, August 2, 2017 0:44 > To: Hu, Robert <robert...@intel.com>; qemu-devel@nongnu.org; qemu- > disc...@nongnu.org > Subject: Re: [Qemu-devel] Does qemu guest agent support 'guest-exec'? > > Quoting Hu, Robert (2017-08-01 02:15:01) > > Hi, > > > > qemu/scripts/qmp/qemu-ga-client seems only support "cat, fsfreeze, fstrim, > halt, ifconfig, info, ping, powerdown, reboot, shutdown, suspend". > > > > But from qemu/qga/commands.c seems at least Linux guest should already > support this. Despite qemu-ga-client, how can I talk to guest-agent in guest > to > execute some program? any other utils? > > qemu-ga-client is more of a helper script to make it easier to execute things > from cmdline and hasn't been updated to support guest-exec. But the official > API is documented in qga/qapi-schema.json and involves talking to qemu-ga > directly via JSON commands. A simple example for guest-exec would be > something like: > > mdroth@loki:~$ sudo nc -U /tmp/vm3-qga.sock > {'execute':'guest-exec','arguments':{'path':'ip','arg': ['addr', 'show', > 'eth0'],'capture-output':true}} > {"return": {"pid": 1462}} > {'execute':'guest-exec-status','arguments':{'pid':1462}} > {"return": {"exitcode": 0, "out-data": > "MjogZXRoMDogPEJST0FEQ0FTVCxNVUxUSUNBU1QsVVAsTE9XRVJfVVA+IG10d > SAxNTAwIHFkaXNjIHBmaWZvX2Zhc3Qgc3RhdGUgVVAgZ3JvdXAgZGVmYXVsdCB > xbGVuIDEwMDAKICAgIGxpbmsvZXRoZXIgNTI6NTQ6MDA6MTI6MzQ6MDMgYnJk > IGZmOmZmOmZmOmZmOmZmOmZmCiAgICBpbmV0IDE5Mi4xNjguMTIyLjEzLzI0 > IGJyZCAxOTIuMTY4LjEyMi4yNTUgc2NvcGUgZ2xvYmFsIGR5bmFtaWMgZXRoMA > ogICAgICAgdmFsaWRfbGZ0IDMwNjRzZWMgcHJlZmVycmVkX2xmdCAzMDY0c2Vj > CiAgICBpbmV0NiBmZTgwOjo1MDU0OmZmOmZlMTI6MzQwMy82NCBzY29wZSB > saW5rIAogICAgICAgdmFsaWRfbGZ0IGZvcmV2ZXIgcHJlZmVycmVkX2xmdCBmb3J > ldmVyCg==", "exited": true}} ^C mdroth@loki:~$ cat <<EOF | base64 -d [Robert Hoo] [trim...] [Robert Hoo] Thanks Michael, this example is helpful. I'll have a try then. 1 more question: is qemu-ga-client actively maintained? will it be updated to support more guest agent commands? > 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast > state UP group default qlen 1000 > link/ether 52:54:00:12:34:03 brd ff:ff:ff:ff:ff:ff > inet 192.168.122.13/24 brd 192.168.122.255 scope global dynamic eth0 > valid_lft 3064sec preferred_lft 3064sec > inet6 fe80::5054:ff:fe12:3403/64 scope link > valid_lft forever preferred_lft forever > > > > > > Best Regards, > > Robert Hoo > > > >
