Suuport adding extra IP addresses

[dmarkey]

Description

Hey, thanks for colima!

We have a private IP that we use for local development thats not 127.0.0.1. So I we have to fiddle with adding IP aliases on loopback like this on the host:

    if [ $(uname) == "Darwin" ] ; then
        sudo ifconfig lo0 alias 172.16.1.1  255.255.255.255
        sudo ifconfig lo0  alias 172.16.1.200  255.255.255.255
    fi

    if [ $(uname) == "Linux" ] ; then
        if ! ip addr show to 172.16.1.1 | grep UP ; then
            sudo ip addr add 172.16.1.1/24 dev lo
            sudo ip addr add 172.16.1.200/24 dev lo
        fi
    fi
}

Would be great if this could be built in.

[abiosoft]

If you're on version v0.7.3, you can start Colima with --network-host-addresses and you'd be able to use those addresses for port forwarding.

docker run --rm -it -p 172.16.1.200:80:80 caddy

[technicalpickles]

Is there any other steps or configuration needed? I've tried adding this to my profile:

network:
  addresses:
    - "127.0.0.1"
    - "172.16.100.1"

And I get errors like this:

❯ docker run --rm -d --name my_nginx -p 172.16.100.1:8080:80 nginx
e184eee8a693278920c00dd491bec2c7889a7a642cf10add298cd83bafb06056
docker: Error response from daemon: driver failed programming external connectivity on endpoint my_nginx (fb6a2bb42f7ebc745dfed448c6b94950e6d49b766d50b39cbe3ad0905193e1e6): failed to bind port 172.16.100.1:8080/tcp: Error starting userland proxy: listen tcp4 172.16.100.1:8080: bind: cannot assign requested address.

I have confirmed the interface is up and working in general, and used this one-liner server for ruby:

$ ruby -r webrick -e "server = WEBrick::HTTPServer.new(BindAddress: '172.16.100.1', Port: 8080, DocumentRoot: Dir.pwd); trap('INT') { server.shutdown }; server.start"