Using the DSE configuration volume

Docker images provided by DataStax include a startup script that swaps DataStax Enterprise (DSE) configuration files found in the /config volume directory with the configuration file in the default location on the container.

A container can store configuration files locally. The configuration files used must match a corresponding configuration file in the image. It must also include all required values.

For example, configuration files that can be stored locally for DSE are cassandra.yaml or dse.yaml. A configuration file for OpsCenter can be named opscenterd.conf. For a full list of configuration files, see the DSE configuration templates, OpsCenter configuration templates,and Studio configuration templates.

Create a directory on your local host to store the configuration files.
Add the configuration files to replace in the container.
Mount the local directory to the exposed /config directory during startup.

For example, the following command uses a file located at /dse/conf:
```
docker run -v /dse/conf:/config
```
You can set configuration files in your docker run command when starting a container:
```
docker run -e DS_LICENSE=accept --name my-dse -v /dse/config:/config \
-d cr.dtsx.io/datastax/dse-server:DSE_VERSION
```
If you make changes or add config files to the /config volume, restart the container to propagate the changes to the database:
```
docker restart container_name
```
Restarting the container restarts DSE.

Using the DSE configuration volume

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