On Fri, Mar 28, 2014 at 10:33:39AM +0200, Laine Stump wrote:
> Beyond that, a question not with your patch, but with qemu's
> implemenation - does it always assume that the gateway address is
> $network.1 ?
Actually network.2. The default addresses are:
network: 10.0.2.0/24 (ie. mask 255.255.255.0)
default gateway: 10.0.2.2
dns server: 10.0.2.3
dhcp start / normal guest address: 10.0.2.15
It _is_ possible to change the gateway address, by specifying the
(confusingly named) 'host=' parameter. As you suggested I think this
could be mapped to a gateway XML attribute, although libguestfs would
not need to use it.
Rich.
----------------------------------------------------------------------
Full parameters:
-netdev user,id=id[,option][,option][,...]
-net user[,option][,option][,...]
Use the user mode network stack which requires no administrator
privilege to run. Valid options are:
vlan=n
Connect user mode stack to VLAN n (n = 0 is the default).
id=id
name=name
Assign symbolic name for use in monitor commands.
net=addr[/mask]
Set IP network address the guest will see. Optionally specify
the netmask, either in the form a.b.c.d or as number of valid
top-most bits. Default is 10.0.2.0/24.
host=addr
Specify the guest-visible address of the host. Default is the
2nd IP in the guest network, i.e. x.x.x.2.
restrict=on|off
If this option is enabled, the guest will be isolated, i.e. it
will not be able to contact the host and no guest IP packets
will be routed over the host to the outside. This option does
not affect any explicitly set forwarding rules.
hostname=name
Specifies the client hostname reported by the built-in DHCP
server.
dhcpstart=addr
Specify the first of the 16 IPs the built-in DHCP server can
assign. Default is the 15th to 31st IP in the guest network,
i.e. x.x.x.15 to x.x.x.31.
dns=addr
Specify the guest-visible address of the virtual nameserver.
The address must be different from the host address. Default is
the 3rd IP in the guest network, i.e. x.x.x.3.
dnssearch=domain
Provides an entry for the domain-search list sent by the built-
in DHCP server. More than one domain suffix can be transmitted
by specifying this option multiple times. If supported, this
will cause the guest to automatically try to append the given
domain suffix(es) in case a domain name can not be resolved.
Example:
qemu -net user,dnssearch=mgmt.example.org,dnssearch=example.org [...]
tftp=dir
When using the user mode network stack, activate a built-in
TFTP server. The files in dir will be exposed as the root of a
TFTP server. The TFTP client on the guest must be configured
in binary mode (use the command "bin" of the Unix TFTP client).
bootfile=file
When using the user mode network stack, broadcast file as the
BOOTP filename. In conjunction with tftp, this can be used to
network boot a guest from a local directory.
Example (using pxelinux):
qemu-system-i386 -hda linux.img -boot n -net user,tftp=/path/to/tftp/files,bootfile=/pxelinux.0
smb=dir[,smbserver=addr]
When using the user mode network stack, activate a built-in SMB
server so that Windows OSes can access to the host files in dir
transparently. The IP address of the SMB server can be set to
addr. By default the 4th IP in the guest network is used, i.e.
x.x.x.4.
In the guest Windows OS, the line:
10.0.2.4 smbserver
must be added in the file C:\WINDOWS\LMHOSTS (for windows
9x/Me) or C:\WINNT\SYSTEM32\DRIVERS\ETC\LMHOSTS (Windows
NT/2000).
Then dir can be accessed in \\smbserver\qemu.
Note that a SAMBA server must be installed on the host OS.
QEMU was tested successfully with smbd versions from Red Hat 9,
Fedora Core 3 and OpenSUSE 11.x.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-top is 'top' for virtual machines. Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top
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