I want to set a static outbound IP address for my App Engine instance, hence I went through this documentation. I followed all the steps but I am not able to see any traffic logged in the Cloud NAT for the IP address I specified in step 5 (Reserve a static IP address). I realized that this documentation is applicable for App Engine Standard environment and I deploy the instances of my application in App Engine Flex Environment. Does this documentation apply to App Engine Flex Environment as well? If not, how should I setup outbound static IP address for my App Engine flex instances?
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Google has documentation for setting up an external IP for App Engine Standard. However, I have a requirement to set up an external IP for App Engine Flex.
I have followed the tutorial and successfully created a subnetwork with a Cloud Router and Cloud NAT that is connected to an external static IP. I tested that the setup works by creating a VM instance in it, and seeing that all egress traffic does indeed originate from the reserved external static IP.
However, when I deploy the App Engine Flex app to this subnetwork, its requests are not routed through the reserved static IP, but appear to be using the shared IP address pool provided by Google. Everything works normally, and there are no deploy errors, just the reserved external IP is not used. The app is assigned to the subnetwork in app.yaml:
network:
name: default
subnetwork_name: app-engine-subnet
Any hints on getting this Flex instance to route its egress traffic through the reserved external IP? I am aware that this can be done using a VM instance as a proxy, but I'd prefer using Cloud NAT instead.
Per the Google Cloud NAT documentation, Cloud NAT cannot be used with VMs that have an external IP address. App Engine Flex does not support VMs with internal IPs only (Google App Engine documentation), so NAT will not work.
For anyone seeing this in 2023, there is a way to use a Static IP using Cloud NAT. In OP's case (subnetwork, Cloud Route, Cloud NAT and reserved external IP in place), the instance_ip_mode setting would have been added to the network: block with internal as its value, like so:
network:
name: default
subnetwork_name: app-engine-subnet
instance_ip_mode: internal
(https://cloud.google.com/appengine/docs/flexible/reference/app-yaml?tab=node.js#network_settings)
Also note that "Private Google Access" has to be enabled on the subnetwork, even though it's technically not a requirement since a Cloud NAT is configured, App Engine will not deploy if it is disabled.
Egress traffic for the service will now route through Cloud NAT, using the reserved static IP.
I have an application running on Google Cloud's App Engine(flexible environment).
An external API that deals with finances requires us to have a static external IP address so that we may interact. I know App Engine doesn't have an external IP address feature.
I'm also aware that using Google Cloud's Compute Engine, a VM instance with a static IP can be set up.
Is there anyone that has run into this situation and figured out an efficient solution?
As the FAQ for Google App Engine says, App engine does not support static IP.
The only workaround is to use a VM with an static ip to be as a proxy. There is a discussion here.
We want to access some services on Google Kubernetes Engine from a Google App Engine standard via http(s). We don't want to expose the services to external networks because of security.
app engine flexible can use private network with an internal loadbalancer or vpc(post). How about app engine standard?
2 years ago, we could not do it. (post)
We can set rules about IP addresses, but an IP address for an app engine standard is not static.
What is the best solution?
Thanks for your help.
app engine flexible can use private network with an internal loadbalancer or vpc(post). How about app engine standard?
Not really as per this:
"A VPC network, sometimes just called a “network,” is a virtual version of a physical network, like a data center network. It provides connectivity for your Compute Engine virtual machine (VM) instances, Kubernetes Engine clusters, App Engine Flex instances, and other resources in your project."
We can set rules about IP addresses, but an IP address for an app engine standard is not static.
Yes. They are always changing. The recommendation here is to their Static IP range combined with:
Instead, we suggest that you take a defense in depth approach using OAuth and Certs.
You could also look at things like Cloud Armor (in alpha as of this writing), or a Virtual WAF. Longer term it would make more sense to move your workloads from Google App engine into GKE.
On google cloud I have created an app engine on one project and have some auto scaled(server spinup/spindown according to traffic) compute engines on different project. I have a task for allowing traffic to app engine only from those auto scaled compute engines.
Problem with the auto scaled environment we can't guess the server public IP, where as we can get private subnet IP's.
Please let me know how can I solve this issue.
For connecting through a private IP, you need your app engine and compute engine instances to be in the same network. App Engine standard environment is on a different network than the Compute Engine instances and don't have private IP access to each other currently.
You can't achieve that with app engine standard, you will need to consider app engine flex for this (see here how to set the network of your app engine flex instances).
You will have to connect using the external IP address of the service running on your Compute Engine instance by setting up your firewalls.
I achieved this by doing as follow:
Let's say you have Project A and Project B, and a service running in Project A that wants to connect to a compute engine running in Project B.
You need two VPC in A and B with no IP collision.
Create a VPC Network peering From A to B and from B to A.
Create a VPC serverless access connector in project A.
Config your service to use the new connector.
vpc_access_connector:
name: "projects/PROJECT_ID/locations/REGION/connectors/CONNECTOR_NAME"
I created a VM instance in Googl Compute Engine and app in Google App Engine standard environment. I was planning to have my app in App Engine and my database server in Compute Engine. But, I can't connect between the both by internal IP. Is this possible? the app and db are in the same zone (us-east1) but the connection by IP don't work, only work with external IP. Apparently, the rules of firewall are correct.
As of April 9, 2019, you can use the serverless VPC
connector.
This will allow your App Engine application to connect to other internal resources in your VPC network on the Google Cloud Platform, such as Compute Engine VM instances, Cloud Memorystore instances, and any other resources with an internal IP address.
To create a connector:
$ gcloud services enable vpcaccess.googleapis.com
$ gcloud beta compute networks vpc-access connectors create CONNECTOR_NAME \
--network VPC_NETWORK --region REGION --range IP_RANGE
$ gcloud beta compute networks vpc-access connectors describe CONNECTOR_NAME --region REGION
Note: You can see which IP ranges are currently reserved in the Google Cloud Platform Console. You can choose any unused CIDR /28 IP range to use for your connector, for example, 10.8.0.0/28.
$ gcloud beta compute networks vpc-access connectors create my-vpc-connector \
--region=us-central1 --range=10.8.0.0/28
Create request issued for: [my-vpc-connector]
Waiting for operation [xxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxxx] to complete...done.
Created connector [my-vpc-connector]
To connect your connector to a service add this to your service's app.yaml file:
vpc_access_connector:
name: "projects/PROJECT_ID/locations/REGION/connectors/CONNECTOR_NAME"
Deploy the service:
$ gcloud beta app deploy
Note: To use Serverless VPC Access, make sure you use gcloud beta to deploy your service. You can get access to beta commands by running gcloud components install beta.
After you deploy your service, it is able to send requests to Internal IP addresses or DNS Names in order to access resources in your VPC Networks. In case any trouble please allow about one hour or more to let the connectors are propagated completely in the GCP Global Networks.
For connecting through a private IP you need that the app and DB will be in the same network.
You can't achieve that with app engine standard, you need app engine flex for this (see here how to set the network of your app engine flex instances)
You will have to connect using the external IP address of the service running on your Compute Engine instance. App Engine standard environment is on a different network than the Compute Engine instances and don't have private IP access to each other currently. Switching to an application (or service of an application) on the flexible environment might work for you if the costs associated make sense.