Synology DSM 7 Docker error – Container crashes on boot – Solution / Fix

A common issue that appeared with DSM 7 is that some well known containers started crashing when the NAS boots up.

This is accompanyed by this error:

Options error: In [CMD-LINE]:1: Error opening configuration file:

The most common docker container images associated with this are:

• wheelybird/openvpn-server-ldap-otp
• markusmcnugen/qbittorrentvpn
• haugene/transmission-openvpn

To solve this you need to configure the Docker container with certain privileges, following these steps:

1. Open the Docker application
2. Go to “Container”
3. Select and Stop the container (if running)
4. Under “General Settings” press the “Configure capabilities” button
5. Check “NET_ADMIN” and press the “OK” button
6. If checked, uncheck the “Execute container using high privilege” and press the “Apply” button
7. Start the container.

Here’s a screenshot to help you with these options: