AppEngine
App Engine requires that your application listens on port 8080
In the free tier, you have a limit of 12 projects. The free tier is available only for the Standard Environment (not flex env). Reddit thread: Is there is a new limit on free Google App Engine projects? : AppEngine
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+ Per this doc, only automatic scaling is supported in F1 instances. | “App Engine standard environment scales down to 0 instance by default so you shouldn't have to specify it in your app.yaml.” [source]
+ When you deploy your app to Google App Engine, it's automatically associated to one of the following instance types:
Frontend Instance: 28 free F1 instance-hours per day
Backend Instance: 9 free B1 instance-hours per day
By default, your app is assumed to be a Frontend Instance with automatic scaling. But if you change the app.yaml in your root directory, and introduce a configuration to enable the Basic or Manual scaling, your app will become assumed to be a Backend Instance. To ensure that your app usage will always be free, you can define the following properties in your app.yaml file
instance_class: F1
automatic_scaling:
max_instances: 1
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appengine project cleanup useful gcloud commands gcloud app versions list
Choosing an appengine environment
Add the —quiet flag to your gcloud command to disable all interactive prompts
When deploying using a gcloud command, specify explicitly your app's version to avoid having multiple instances being billed thus reducing your daily free hours allowance. A gcloud deploy command example would be: gcloud --quiet app deploy --version=production
[source]
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