Integrate Amazon EC2 with Firebase / Firestore to automate your work

To trigger a Firebase function from an EC2 instance, you can use HTTP requests. Deploy your Firebase functions on HTTPS endpoints which your EC2 application can call using POST or GET methods to initiate any background processes or real-time updates.

Yes, it's possible. You can authenticate your EC2 application using Firebase Admin SDK, which allows you to securely interact with Firestore and perform create, read, update, and delete operations directly from the server environment.

Your EC2 instance needs appropriate roles and permissions set via Google Cloud IAM (Identity Access Management). Specifically, you should generate a service account in Google Cloud and assign roles such as 'Firestore Editor' to allow for data manipulation in Firestore.

Secure communication between Amazon EC2 and Firebase can be achieved by using HTTPS endpoints for any API calls. Additionally, utilizing authentication tokens provided by Firebase ensures that only authorized instances have access to your database or functions.

While Firestore itself doesn't support cron jobs natively, you can set up cron jobs in your Amazon EC2 instances that periodically check for conditions or changes in Firestore data and execute tasks accordingly. Alternatively, consider leveraging Cloud Functions for event-driven execution directly tied to Firestore changes.

There might be bandwidth considerations depending on the volume of data you're transmitting between the two services. Ensure that your network setup supports the anticipated traffic load; use appropriate compression techniques when sending large amounts of data from Amazon EC2 to limit bandwidth usage effectively.

Common use cases include real-time processing of user-generated content where changes need immediate reflection in a companion app using Firestore as a backend. Another scenario is performing intensive computations within AWS environments while keeping user-facing operations streamlined within Firebase.