For additional information on Free Tier you can visit this article <https://cloud.google.com/free/docs/frequently-asked-questions>. You will not be able to request additional quota while using this tier.
As previously stated, you can always check the resource quota <https://cloud.google.com/compute/quotas> to fully understand what are your limitations. You certainly cannot assign the same IP to different VMs. If you are actually limited to one external IP (which is different from using an static IP <https://cloud.google.com/compute/docs/ip-addresses/reserve-static-external-ip-address>), you could use a bastion host <https://cloud.google.com/solutions/connecting-securely#bastion> to connect to other instances that do not have external IP. Communication between instances via internal IP is certainly feasible. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/04fc7701-f1a5-490b-b546-8b6c16ff77c8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
