Multiple IP addresses on a single Google Compute Engine instance

Question

I'm trying to have my GCE instance listen on multiple IP addresses (for SEO reasons - to host multiple low traffic sites on the same instance).

Final objective: mydomain.com points to IP1, myotherdomain.es points to IP2, the GCE instance will listen on both IP1 and IP2 and serve content accordingly.

I added a target instance pointing to my main instance and managed to create a forwarding rule like this:

gcloud compute forwarding-rules create another-ip --port 80 --target-instance MY_TARGET_INSTANCE_URL

It actually created an ephemeral IP address; I tried to promote it to static but I exceeded my quota (I'm currently on my 2 months free trial).

Is this correct though? Will I be able to create any number of static IPs and point them to my only instance once the trial ends? I also couldn't find anything about pricing: I know an IP assigned to an active instance is free, but what about additional ones?

Since this is a necessary configuration for a site I'm managing, I'd like to be sure it works before committing to moving everything on GCE.

Answer 1

You can get multiple external IPs for one VM instance with forwarding rules.

1. By default, VM will be assigned with an ephemeral external IP, you can promote it to static external IP, which will remain unchanged after stop and restart.
2. Extra external IPs have to be attached to forwarding rules which point to the VM. You can use (or promote to) static IPs as well.

The command you may want to use:

1. Create a TargetInstance for your VM instance:

   gcloud compute target-instances create <target-instance-name> --instance <instance-name> --zone=<zone>
   

2. Create a ForwardingRule pointing to the TargetInstance:

   gcloud compute forwarding-rules create <forwarding-rule-name> --target-instance=<target-instance-name> --ip-protocol=TCP --ports=<ports>
   

See Protocol Forwarding.

Answer 2

I am also need 2 static ips for one compute engine instance but google's quota is not allow this.

You can see your quotas from https://console.cloud.google.com/iam-admin/quotas