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# Development Environments
Beside the __prod__ and __preprod__ environments also development environments can be deployed on the puppet server. To create a new test environment simply:
Beside the __prod__ and __preprod__ environments, development environments for feature branches of the puppet git repository are automatically put on and removed from the puppet server. To create a new feature branch and test environment simply:
1. Clone the puppet repository https://git.psi.ch/linux-infra/puppet
2. Create a new branch with a name that matches following regex: `^[a-z]+[a-z,0-9,_]+$` (e.g. my_test_branch)
3. Do and commit your changes
3. Do the necessary changes and commit your changes
4. Push the new branch / changes to the git server
Whenever the git server receives a push a gitlab-runner gets triggered on the puppet server that does the automatic checkout of the branch and registers this as a new development environment.
Note: If branches are deleted on the git server the corresponding checkouts/environments on the puppet server will also be removed.
Note: If branches are deleted on the git server the corresponding checkouts/environments on the puppet server will also be removed. (with some delay)
To use/test the code changes via the puppet test environment use
```
puppet agent -t --environment=issue_x
```
Continue the commit / push / test cycle until your changes are working. Afterwards create a merge request for the branch to the __preprod__ branch.
The following video shows all the necessary steps in detail:
<video controls width="100%" src="../../_static/videos/dev_environments.m4v">video</video>
Once you are done with the develoment and testing create a merge request for the branch to the __preprod__ branch.
## Development Environment Names
The name of an branch/environment must match the following regex expression: `^[a-z]+[a-z,0-9,_]+$`