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Re: cf restart-app-instance and environment variables #cf

Zach Robinson
 

Hey Preetam

There's not any work to get 'cf restart-app-instance` to update env vars and there is not a way to clone an app.

The current canonical method for updating an app's config, is to perform a blue-green deployment https://docs.cloudfoundry.org/devguide/deploy-apps/blue-green.html

There is also work in flight to implement rolling updates of applications that will allow 'cf restart' to update environment variables for an app based on this proposal https://docs.google.com/document/d/116I_mOWjZcPeIbUvvsh-jAcwpoE_mGPD_SkCel5xXuU/edit#

-Zach
CAPI Project Lead


On Tue, Jun 19, 2018 at 6:54 AM Preetam Palwe <preetam.palwe@...> wrote:
Thanks Dan - It's a reasonable guess!

Following link has some explanation about why it has not worked on Diego - (The documentation of cf restart-app-instance should have this mentioned.)
https://github.com/cloudfoundry/cli/issues/777 

As per above link - Diego team has done some work to propogate env var changes during restart-app-instance. Does anyone here know more about it?
Is there any way to get env vars reflected using cf restart-app-instance or any other means without downtime?

On other hand I also thought about using copy-source but that command require the target app to exist. Can we clone the app?

Appreciate any help on this - Many Thanks !
~Preetam
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