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cmd/swarm: allow using a network interface by name for nat purposes #1557
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I didn't want to change the behaviour of the current
--nat
flag. Therefore I added a--natif
flag.E.g.
swarm --natif eth0
will announce you with the IP address that is on theeth0
network interface.This is specially useful when running multiple swarm nodes within docker because it will pickup the IP address of the interface during runtime. Previously I always had to wrap swarm around some shell script to magically get the IP address... which is not nice.