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I am wondering if there is a way to reset the dyno IP on Heroku when I want.
I noticed sometimes it changes when the application is restarted. However, not always.
How can we reset the dyno IP address on restart every time?
I already saw these questions:
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QuotaGuard Static IP's routes your Heroku traffic through a pair of static IP addresses that never change. It should be used if you need your traffic to pass through a known static IP address for the purpose of firewall ingress rules or application allowlisting with a third party.
Because Heroku IPs are dynamic, it can be difficult to integrate Heroku applications with services that allowlist a fixed IP range, including certain APIs and services that operate behind a corporate firewall. Fixie acts as a proxy for outbound traffic, tunneling your requests through a known IP address.
http://httpbin.org/ip is also good. You could use expect to programmatically retrieve the IPs from every dyno by running the Heroku SSH command, waiting for the prompt, running the IP command(s), logging out, then repeating for each dyno instance.
To view and modify your app’s dyno settings, you can use the Heroku CLI. Start worker dynos. (Look at your Procfile to see the worker process types that are defined for your app) Scale horizontally and vertically at the same time.
Deploying to dynos, and relying on Heroku's dyno management, makes it easy for you to build and run flexible, scalable apps - freeing you from managing infrastructure, so you can focus on building and running great apps. What is it good for? Ideal for experimenting with cloud applications in a limited sandbox.
When you deploy or scale your app, Heroku will automatically create one or more dynos, each loaded with the same stack and slug representing your application. Heroku's Dyno Manager then executes the command you provided in your configuration file to start your application running on Heroku.
Private Dynos only run in Private Spaces and are available in Heroku Enterprise. To scale horizontally (scale out), add more dynos. For example, adding more web dynos allows you to handle more concurrent HTTP requests, and therefore higher volumes of traffic. For more information, see Scaling Your Dyno Formation.
It turns out by restarting the app (deleting the dynos), the IP is changed, by default.
You can do this by using the Heroku API.
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