nventiveux / docker-syncthing Goto Github PK

• Ensure Docker Engine is there.
• Pull image
• Install service
• Start

• Description
• License

Done in commit 874fd39 but still need build tests !

See --user / --group in docker run reference:

• --user: https://docs.docker.com/engine/reference/run/#/user
• --group-add: https://docs.docker.com/engine/reference/run/#/additional-groups

New environment variables:

• SYNCTHING_USER / SYNCTHING_USER_UID
• SYNCTHING_GROUP / SYNCTHING_GROUP_GID

Create a docker-entrypoint.sh which will use such environment variables to create the user and group dynamically at container runtime instead of during image build.

We will need augeas package in Alpine image to throttle the bandwidth in /etc/syncthing/config.xml.

The syncthing database volume was named syncthing_data for all instances which can cause big
troubles and instance overlap, etc...

Migration steps

In order to change the existing syncthing_data volume to new naming scheme, you need to backup existing syncthing database:

$ sudo systemctl stop docker-syncthing@<INSTANCE>
$ docker run -it --rm -v /tmp/syncthing_backup:/backup -v syncthing_data:/etc/syncthing nventiveux/docker-alpine-rpi tar zcvf /backup/syncthing_db.tar.gz /etc/syncthing

Backup will be available on host in /tmp/syncthing_backup/syncthing_db.tar.gz. Keep it safe.

Destroy the existing volume:

$ docker volume rm syncthing_data

Update systemd service file and start service again to recreate the volume with correct instance name.
Stop the service and restore the database:

$ docker run -it --rm -v /tmp/syncthing_backup:/backup -v syncthing_$USER_data:/etc/syncthing nventiveux/docker-alpine-rpi sh
sh# ( rm -rf /etc/syncthing/* && cd / && tar zxvf /backup/syncthing_db.tar.gz )

Start the service again.