The only way we had to pass -nic options to QEMU was to specify the
number of networks using the --nets option. Depending on its value, the
option would instruct QEMU to:
* instantiate *n* user host networks if --nets >= 1
* instantiate no network if --nets is 0
* instantiate a "dead" network if --nets < 0
To simulate more advanced networks (such as networks where HTTP proxy is
needed), we want to add the possibility to use TAP network interfaces.
This patch adds the ability to pass custom -nic options to QEMU.
Three new options are available:
* The --nic option passes the argument as-is to QEMU -nic option
* The --nic-user option passes a user host network -nic option to QEMU
- with SSH forwarding enabled. This is just like we do when using the
--nets >= 1 option)
* The --net-tap takes the name of an existing tap interface and
generates the following -nic argument:
tap,id={ifname},ifname={ifname},script=no,downscript=no,model=e1000
In the example below:
* the first network uses the tap0 interface.
* the second network uses the tap1 interface (it is syntactically
equivalent to the first one)
* the third network uses a user host network (with SSH forwarding)
$ kvm-test.py \
--nic tap,id=tap0,ifname=tap0,script=no,downscript=no,model=e1000 \
--nic-tap tap1 \
--nic-user
Signed-off-by: Olivier Gayot <olivier.gayot@canonical.com>
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