[libvirt] [PATCHv4 4/5] domifaddr: Add virsh support
Nehal J Wani
nehaljw.kkd1 at gmail.com
Tue Aug 27 13:58:23 UTC 2013
On Tue, Aug 27, 2013 at 6:20 PM, Daniel P. Berrange <berrange at redhat.com>
wrote:
>
> On Sun, Aug 25, 2013 at 04:45:44AM +0530, Nehal J Wani wrote:
> > Use virDomainInterfacesAddresses in virsh
> >
> > tools/virsh-domain-monitor.c
> > * Introduce new command : domifaddr
> > virsh # domifaddr f18
> > Name MAC address IPv4 address IPv6 address
> >
-------------------------------------------------------------------------------
> > lo 00:00:00:00:00:00 127.0.0.1/8
::1/128
> > eth0 52:54:00:89:4e:97 192.168.101.130/24 fe80::5054:ff:fe89:4e97/64
> > eth0:1 52:54:00:89:4e:97 192.168.101.133/24
> > eth0:2 52:54:00:89:4e:97 192.168.101.132/24
> > eth1 52:54:00:89:ad:35 192.168.102.142/24 fe80::5054:ff:fe89:ad35/64
> > eth1:1 52:54:00:89:ad:35 192.168.102.143/24
> > eth2 52:54:00:d3:39:ee 192.168.103.183/24 fe80::5054:ff:fed3:39ee/64
> > eth2:0 52:54:00:d3:39:ee 192.168.103.184/24
> > eth2:1 52:54:00:d3:39:ee 192.168.103.185/24
> > eth3 52:54:00:fe:4c:4f 192.168.101.197/24 fe80::5054:ff:fefe:4c4f/64
> > eth3:1 52:54:00:fe:4c:4f 192.168.101.198/24
>
> This formatting of IP addrs is broken.
>
> We should not expose interface aliases 'eth0:1', 'eth0:2', etc. If QEMU
agent
> is returning such names, either we should fix the agent, or strip the ":1"
> suffixes in libvirt. The aliased names are an artifact of the legacy
linux IP
> config tools. The new 'ip' command does not use these - it just shows
'eth0'
> with multiple IPv4 and multiple IPv6 addresses, which is also how
libvirt/netcf
> report physical device names & config.
>
> Our display format must allow for NICs having arbitrarily many addresses
> of either type, so displaying IPv4/IPv6 side by side will not work.
>
> I think we need a display format like:
>
> virsh domifaddr f18
> Name MAC address Protocol Address
>
-------------------------------------------------------------------------------
> lo 00:00:00:00:00:00 ipv4 127.0.0.1/8
> - - ipv6 ::1/128
> eth0 52:54:00:89:4e:97 ipv4 192.168.101.130/24
> - - ipv4 192.168.101.133/24
> - - ipv4 192.168.101.132/24
> - - ipv6 fe80::5054:ff:fe89:4e97/64
> eth1 52:54:00:89:ad:35 ipv4 192.168.102.142/24
> - - ipv4 192.168.102.143/24
> - - ipv6 fe80::5054:ff:fe89:ad35/64
>
>
> With option to fully display all fields to make life easier for scripts:
>
> virsh domifaddr --full f18
> Name MAC address Protocol Address
>
-------------------------------------------------------------------------------
> lo 00:00:00:00:00:00 ipv4 127.0.0.1/8
> lo 00:00:00:00:00:00 ipv6 ::1/128
> eth0 52:54:00:89:4e:97 ipv4 192.168.101.130/24
> eth0 52:54:00:89:4e:97 ipv4 192.168.101.133/24
> eth0 52:54:00:89:4e:97 ipv4 192.168.101.132/24
> eth0 52:54:00:89:4e:97 ipv6 fe80::5054:ff:fe89:4e97/64
> eth1 52:54:00:89:ad:35 ipv4 192.168.102.142/24
> eth1 52:54:00:89:ad:35 ipv4 192.168.102.143/24
> eth1 52:54:00:89:ad:35 ipv6 fe80::5054:ff:fe89:ad35/64
>
>
> > +
> > + for (i = 0; i < ifaces_count; i++) {
> > + virDomainInterfacePtr iface = ifaces[i];
> > + virBuffer buf = VIR_BUFFER_INITIALIZER;
> > + const char *hwaddr = "";
> > + const char *ip_addr_str = NULL;
> > +
> > + if (interface && STRNEQ(interface, iface->name)) {
> > + virBufferFreeAndReset(&buf);
> > + continue;
> > + }
> > +
> > + if (iface->hwaddr)
> > + hwaddr = iface->hwaddr;
> > +
> > + for (j = 0; j < iface->naddrs; j++) {
> > + if (j)
> > + virBufferAsprintf(&buf, "%25s/%d",
> > + iface->addrs[j].addr,
> > + iface->addrs[j].prefix);
> > + else
> > + virBufferAsprintf(&buf, "%s/%d",
> > + iface->addrs[j].addr,
> > + iface->addrs[j].prefix);
>
> This logic is very broken not allowing for multiple addrs per device
>
> > + }
> > +
> > + if (virBufferError(&buf)) {
> > + virBufferFreeAndReset(&buf);
> > + virReportOOMError();
> > + return ret;
> > + }
> > +
> > + ip_addr_str = virBufferContentAndReset(&buf);
> > +
> > + if (!ip_addr_str)
> > + ip_addr_str = "";
> > +
> > + vshPrintExtra(ctl, " %-10s %-17s %s\n",
> > + iface->name, hwaddr, ip_addr_str);
> > +
> > + virBufferFreeAndReset(&buf);
> > + }
> > +
> > + ret = true;
> > +
> > +cleanup:
> > + for (i = 0; i < ifaces_count; i++)
> > + virDomainInterfaceFree(ifaces[i]);
> > + VIR_FREE(ifaces);
> > +
> > + virDomainFree(dom);
> > + return ret;
> > +}
> > +
> > const vshCmdDef domMonitoringCmds[] = {
> > {.name = "domblkerror",
> > .handler = cmdDomBlkError,
> > @@ -1944,5 +2039,11 @@ const vshCmdDef domMonitoringCmds[] = {
> > .info = info_list,
> > .flags = 0
> > },
> > + {.name = "domifaddr",
> > + .handler = cmdDomIfAddr,
> > + .opts = opts_domifaddr,
> > + .info = info_domifaddr,
> > + .flags = 0
> > + },
> > {.name = NULL}
> > };
>
>
> Daniel
> --
> |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/:|
> |: http://libvirt.org -o- http://virt-manager.org:|
> |: http://autobuild.org -o- http://search.cpan.org/~danberr/:|
> |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc:|
>
> --
> libvir-list mailing list
> libvir-list at redhat.com
> https://www.redhat.com/mailman/listinfo/libvir-list
Suppose I have the following network configuration in my guest:
[root at localhost ~]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.154.8 netmask 255.255.0.0 broadcast 192.168.255.255
inet6 fe80::5054:ff:fefe:4c4f prefixlen 64 scopeid 0x20<link>
inet6 2001:db8:0:f101::2 prefixlen 64 scopeid 0x0<global>
inet6 2001:db8:0:f101::1 prefixlen 64 scopeid 0x0<global>
ether 52:54:00:fe:4c:4f txqueuelen 1000 (Ethernet)
RX packets 1535 bytes 123240 (120.3 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1133 bytes 160636 (156.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eth0:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 102.168.168.168 netmask 255.255.0.0 broadcast 192.168.255.255
ether 52:54:00:fe:4c:4f txqueuelen 1000 (Ethernet)
eth0:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.101.197 netmask 255.255.255.0 broadcast
192.168.101.255
ether 52:54:00:fe:4c:4f txqueuelen 1000 (Ethernet)
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 16436
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 0 (Local Loopback)
RX packets 8 bytes 616 (616.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 8 bytes 616 (616.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root at localhost ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state
UP qlen 1000
link/ether 52:54:00:fe:4c:4f brd ff:ff:ff:ff:ff:ff
inet 192.168.154.8/16 brd 192.168.255.255 scope global eth0
inet 192.168.101.197/24 brd 192.168.101.255 scope global eth0:1
inet 102.168.168.168/16 brd 192.168.255.255 scope global eth0:0
inet6 2001:db8:0:f101::2/64 scope global
valid_lft forever preferred_lft forever
inet6 2001:db8:0:f101::1/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::5054:ff:fefe:4c4f/64 scope link
valid_lft forever preferred_lft forever
[root at localhost ~]#
Now, qemu-guest-agent returns back (after making it pretty):
{
"return": [
{
"name": "lo",
"ip-addresses": [
{
"ip-address-type": "ipv4",
"ip-address": "127.0.0.1",
"prefix": 8
},
{
"ip-address-type": "ipv6",
"ip-address": "::1",
"prefix": 128
}
],
"hardware-address": "00:00:00:00:00:00"
},
{
"name": "eth0",
"ip-addresses": [
{
"ip-address-type": "ipv4",
"ip-address": "192.168.154.8",
"prefix": 16
},
{
"ip-address-type": "ipv6",
"ip-address": "2001:db8:0:f101::2",
"prefix": 64
},
{
"ip-address-type": "ipv6",
"ip-address": "2001:db8:0:f101::1",
"prefix": 64
},
{
"ip-address-type": "ipv6",
"ip-address": "fe80::5054:ff:fefe:4c4f",
"prefix": 64
}
],
"hardware-address": "52:54:00:fe:4c:4f"
},
{
"name": "eth0:1",
"ip-addresses": [
{
"ip-address-type": "ipv4",
"ip-address": "192.168.101.197",
"prefix": 24
}
],
"hardware-address": "52:54:00:fe:4c:4f"
},
{
"name": "eth0:0",
"ip-addresses": [
{
"ip-address-type": "ipv4",
"ip-address": "102.168.168.168",
"prefix": 16
}
],
"hardware-address": "52:54:00:fe:4c:4f"
}
]
}
So, qemu-ga doesn't understand that there can't be more than one
device with same MAC addr. So, I think we are left with the following
options:
(i) Modify qemu-guest-agent to return addresses belonging to same
MAC address grouped under one interface only.
OR
(ii) Let the reply be as it is now. Strip the ":0", ":1" from the response
of guest agent (Is this really necessary?) . We'll have to parse the JSON
multiple times and fill the virDomainInterface structs by grouping them
according to the MAC addresses.
--
Nehal J Wani
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