Cloud-config networking configuration with both IPv4 and IPv6

RancherOS
1

Hi,

On both http://docs.rancher.com/os/cloud-config/ and http://docs.rancher.com/os/configuration/networking/ I’ve found how to do basic IPv4 network configuration in cloud-config, instead of defaulting to DHCP.

I can’t seem to find how to set multiple IPv4 addresses on an interface, or both an IPv4 and an IPv6 address. Is this possible using cloud-config? If not, is it possible to somehow create a script which adds this IPv6 address to eth0, before any (user) Docker containers are started?

Thanks!
Robbert

2

You can use addresses (vs the single address) to set up multiple IP addresses on an interface, like this:

#cloud-config
rancher:
  network:
    interfaces:
      eth1:
        addresses:
        - 192.168.0.102/24
        - 10.0.2.15/24
        gateway: 10.0.2.2

You can also use gateway_ipv6 key to set IPv6 gateway to the interface.

3

Great, thanks a lot!

About this:

  • Can the addresses list also take IPv6 addresses?
  • Does gateway_ipv6 require square brackets around the gateway address or a prefix-length?

Thanks again!

4

To answer my own questions: I was having some problems getting this working with one of the previous versions of RancherOS, but I’ve just gave it another shot on v0.4.4, and I can confirm this is working:

#cloud-config
rancher:
  network:
    interfaces:
      eth*:
        dhcp: false
      eth0:
        addresses:
          - 192.168.0.8/24
          - fd00:dead:beef::8/48
        gateway: 192.168.0.1
        gateway_ipv6: fd00:dead:beef::1