> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/cortex-xdr-5.x/detect-investigate-and-respond-to-threats/investigate-and-respond-to-cases/automation/engines/install-an-engine/docker/docker-hardening-guide/configure-docker-images.md).

# Configure Docker images

Configure Docker images used by Cortex XDR engines.

You can apply more specific fine tuned settings to Docker images, according to the Docker image name or the Docker image name including the image tag. To apply settings to a Docker image name, add the advanced configuration key to the engine configuration file. If you apply Docker image specific settings, they will be used instead of the general **`python.pass.extra.keys`** setting. This overrides the general memory and CPU settings, as needed.

1. Edit the engine configuration file either by editing the `d1.conf` file, or If you installed via Shell, you can edit the configuration in the UI as well as editing the file directly. For details, see [Configure engines](/cortex-xdr-5.x/detect-investigate-and-respond-to-threats/investigate-and-respond-to-cases/automation/engines/configure-engines.md).
2. Add the following key to apply settings to a Docker image name.

   **`"python.pass.extra.keys.<image_name>"`**

   For example, **`"python.pass.extra.keys.demisto/dl"`**.

   * To apply settings to a Docker image name, including the image tag, use **`"python.pass.extra.keys.<image_name>": "<image_tag>"`**.

     For example, **`"python.pass.extra.keys.demisto/dl": "1.4"`**.
   * To set the Docker images **`demisto/dl`** (all tags) to use a higher max memory value of 2g and to remain with the recommended PIDs and ulimit, add the following to the configuration file:**`"python.pass.extra.keys.demisto/dl": "--memory=2g##--ulimit=no- file=1024:8192##--pids-limit=256"`**
3. Save the changes.
4. Restart the demisto service on the engine machine.

   **`sudo systemctl start d1`**

   (Ubuntu) **`sudo service d1 restart`**


---

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