What happens when I cf push?

1. App files sent to CF
2. Runnable app artefact is created (droplet)
3. App starts on an app host

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App receives web requests (if it binds to TCP port)

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1. App files sent to CF

By the cf cli, no other dependency required

Define in .cfignore files that should not be sent

Note: cf cli sent all our app files to the Cloud Controller

The Cloud Controller stores all files it receives in the Blob Store

It also stores metadata about the app in the database

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2. Runnable app artefact

App Files + Runtime Dependencies = App Artefact

Note: This is done by the Buildpack, part of the staging phase

The majority of the output from a cf push is this staging phase

You will find more about Buildpacks in the next topic

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3. App starts on an app host

If it's a web process, it binds to a TCP port