The tap-vsockd service is started from eth1's pre-up script.
On the Mac: the bind of the AF_HYPERV socket fails, and eth1 is skipped.
On Windows: if there is no database then eth1 is skipped.
On Windows: if the database has network=native then eth1 is brought up.
Signed-off-by: David Scott <dave.scott@docker.com>
The NIC with the lowest metric is used for routing, while the NIC with
the highest index is used for DNS. Set the metric of eth1 to 199, so it
is higher-priority than eth0, so we use eth1 for everything in a dual
NIC configuration.
Signed-off-by: David Scott <dave.scott@docker.com>
This makes it possible to have one NIC controlled by vmnet and another
controlled by slirp.
If eth1 doesn't exist then a harmless message is generated during
bootup: (with no appreciable delay)
* Starting networking ... * lo ... [ ok ]
* eth0 ... [ ok ]
* eth1 ...ip: ioctl 0x8913 failed: No such device
[ !! ]
Signed-off-by: David Scott <dave.scott@docker.com>
