I'm happily using vde/qemu now for years on debian/unbutu and had never
any problems, apart from having to compile qemu myself for vde support,
which always worked fine.
I now tried to put together a system with qemu 2.2.0 and vde2 2.3.2 and
while vde seems to run ok, the qemu vm cannot communicate with the vde
network. qemu 2.2.0 self-compiled against libvdeplug 2.2.3 and running
vde2 2.2.3 from Ubuntu works runs fine.
I have setup my vde_switch as follows:
modprobe kvm-intel
chgrp adm /dev/kvm
chmod g+rw /dev/kvm
echo "1024" > /proc/sys/dev/hpet/max-user-freq
modprobe tun
vde_switch -tap tap0 --pidfile /var/run/qemu-vde_switch.pid -daemon
chmod -R a+rwx /var/run/vde.ctl
ifconfig tap0 192.168.8.1 broadcast 192.168.8.255 netmask 255.255.255.0 up
echo "1" > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
dnsmasq --log-queries --user=dnsmasq \
--dhcp-leasefile=/var/lib/misc/qemu-dhcpd.leases \
--dhcp-range=192.168.8.101,192.168.8.199,255.255.255.0,192.168.8.255,8h \
--interface=tap0 \
--domain=decentral.ch \
--pid-file=/var/run/qemu-dnsmasq.pid
The vde_switch runs ok, I guess, I can ping 192.168.8.1 and do an
nslookup www.google.com 192.168.8.1
with good results.
I have compiled qemu with vde support (--enable-vde), the binary also
links against vde:
ldd /usr/bin/qemu-system-x86_64
linux-vdso.so.1 (0x00007fffc05f5000)
libz.so.1 => /lib/libz.so.1 (0x00007f23ca87e000)
libcurl.so.4 => /usr/lib/libcurl.so.4 (0x00007f23ca62d000)
libgthread-2.0.so.0 => /usr/lib/libgthread-2.0.so.0 (0x00007f23ca42c000)
libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0x00007f23ca121000)
librt.so.1 => /lib/librt.so.1 (0x00007f23c9f19000)
libpixman-1.so.0 => /usr/lib/libpixman-1.so.0 (0x00007f23c9c6f000)
libutil.so.1 => /lib/libutil.so.1 (0x00007f23c9a6c000)
libncursesw.so.5 => /lib/libncursesw.so.5 (0x00007f23c9808000)
libasound.so.2 => /usr/lib/libasound.so.2 (0x00007f23c94e3000)
libvdeplug.so.3 => /usr/lib/libvdeplug.so.3 (0x00007f23c92de000)
....
I start the quest vm with parameters:
/usr/bin/qemu-system-x86_64 -enable-kvm -m 1024 -boot c -hda sda -cdrom
gaiarise-vga.iso -net nic,macaddr=52:54:00:12:34:84 -net vde -vnc
192.168.219.22:5900 -k de-ch -vga std
The network card comes up in the qemu guest vm, but neither
communication with dhcp nor a fixed ip works. The host system is running
kernel 3.19.1, the guest also something like that although the guest is
definitely not the problem, as the same guest runs fine on my ubuntu
system with vde 2.2.3.
When the vm starts, I get a
ls -l /var/run/vde.ctl/*
srwx------ 1 timtas root 0 Mar 11 10:58 /var/run/vde.ctl/002.7
srwxrwxrwx 1 root root 0 Mar 11 10:58 /var/run/vde.ctl/ctl
so, it seems that some connection to the switch is made. On my ubuntu,
the files however look a bit different:
ls -l /var/run/vde.ctl/*
srwx------ 1 qemu root 0 Mar 2 18:46 /var/run/vde.ctl/002
srwxrwxrwx 1 root root 0 Aug 8 2014 /var/run/vde.ctl/ctl
Is there something else I have to do to make this work, maybe dowgrade
to 2.2.3 or do I have to set some kernel parameters on the host system?
I also tried svn (r587), with the exact same results, btw.
Kind regards
Tim
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