When running in GCE platform, an instance has access to:

http://metadata.google.internal/computeMetadata/v1/instance/network-interfaces/0/ip

Which gives back the private IP address, for example 10.240.0.2.

http://metadata.google.internal/computeMetadata/v1/instance/network-interfaces/0/externalIp

Gives back the public Ip address, for example 130.211.108.21.

As we have for ec2, we can support new network host settings:

• _gce:privateIp_: maps to ip
• _gce:publicIp_: maps to externalIp
• _gce_ shorter version for _gce:privateIp_