How to create a Firebase Cloud Function with static outbound IP

Most of you have already created server-less functions which generates dynamic IP address(es). Mostly all this happens at the backend and you don’t have to worry about it. Trouble begins when you need to have a static outbound IP address of your function. It is generally required as a safety measure (for whitelisting) when integrating with external APIs (like PayTM payout APIs, Msg91 APIs etc). So here in this article, we will see how to create a firebase cloud function that has a static outbound IP.

In simple terms, you will connect your cloud function to a VPC Connector. This VPC will somehow be configured to tell the cloud function to pass the traffic using the static outbound IP from the VPC.

Run this command in terminal to check the networks list

You should see an output like this

Here you can check the name of your VPC network. Most of the times, it will be default.

Run the following code to create a new router

Here, replace :

Run the following command in terminal

In the command above, replace:

Run the following command

In the command above, replace:

This is needed to route the traffic originating from the VPC network using the static IP address you created in Step 3

Run the following commands to create the connector

Replace the following:

To verify wether your connector is ready or not, run the following command

Replace the following:

The output should contain the line state: READY.

Now we are all set. All we need to do now is create the required function and link it to the VPC Connector. I have attached a dummy function code below which prints the outbound IP address. Have a look.

Voila! All done now. Now you can have the ease of having a static IP within the comfort of firebase cloud functions. Enjoy!

You should see something like this 👇

Some useful resources for further clarifications :

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