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Document 0.5.x container removal strategy. Closes #1982 #2004

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Document 0.5.x container removal strategy. Closes #1982 #2004

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4 changes: 3 additions & 1 deletion docs/application-deployment.md
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Expand Up @@ -182,7 +182,9 @@ This is in particular useful, then you want to deploy to root domain, as

## Dokku/Docker Container Management Compatibility

Dokku is, at its core, a docker container manager. Thus, it does not necessarily play well with other out-of-band processes interacting with the docker daemon. One thing to note as in [issue #1220](https://github.com/dokku/dokku/issues/1220), dokku executes a cleanup function prior to every deployment. This function removes all exited containers and all 'unattached' images.
Dokku is, at its core, a docker container manager. Thus, it does not necessarily play well with other out-of-band processes interacting with the docker daemon. One thing to note as in [issue #1220](https://github.com/dokku/dokku/issues/1220), dokku executes a cleanup function prior to every deployment.

As of 0.5.x, this function removes all containers with the label `dokku` where the status is either `dead` or `exited`, as well as all `dangling` images. Previous versions would remove `dead` or `exited` containers, regardless of their label.

### Adding deploy users

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