assign-external-static-ips.md

Assign External Static IPs

Add a new target address to the host interface, assuming em1

$ sudo ip addr add 10.12.224.117/23 dev em1

Run docker with -p option to bind to exposed ports

$ docker run -d --name web -p 10.12.0.117:80:80 nginx

Permanent Setup

After reboot the addition IP will not be added, the /etc/network/interfaces file needs to be modified to make the changes permanent

For each new IP add, with increasing numbers for the aliases (number after :)

iface em1:1 inet static
    address 10.17.224.117
    network 10.17.224.0
    netmask 255.255.254.0

Modify this line:

auto em1

To include all of the additional IP aliases:

auto em1 em1:1 em1:2

Notes

Setting up something like GitLab requires ports 22, 80, 443 and by default SSH & Apache2 listen on all IPs so they need to be restricted to use the other IP and the same ports

Source

• http://blog.oddbit.com/2014/08/11/four-ways-to-connect-a-docker/