Upgrading container ?

[DuvelCorp]

Hello

I am not really a docker expert and I can't figure out how I can upgrade my container to run the latest version.

My actual config is running perfectly for several months, but my understanding is that am running an old image 3.3 that can be upgraded to 4.0.

I currently use this docker-compose (On Ubuntu)

version: '3.3'
services:
    transmission-openvpn:
        cap_add:
            - NET_ADMIN
        volumes:
            - '/media/seedbox/torrents/:/data'
            - '/home/seedbox/cyberghost_vpn/:/etc/openvpn/custom/'
        environment:
            - OPENVPN_PROVIDER=CUSTOM
            - OPENVPN_USERNAME=xxxxx
            - OPENVPN_PASSWORD=xxxxx
            - LOCAL_NETWORK=192.168.0.0/16
        logging:
            driver: json-file
            options:
                max-size: 10m
        ports:
            - '9091:9091'
        image: haugene/transmission-openvpn
        restart: unless-stopped

I tried to change my docker-compose file with :

version: '4.0'

but I then end up with those errors :

seedbox@dmzseedbox:~$ sudo docker-compose up
ERROR: Version "4.0" in "./docker-compose.yml" is invalid.
seedbox@dmzseedbox:~$
seedbox@dmzseedbox:~$ sudo docker-compose pull
ERROR: Version "4.0" in "./docker-compose.yml" is invalid

I searched quite a lot on google and reddit, I read the documentation, and nothing helps.

Can you explain how I am supposed to do to upgrade my container image (and obviously keep all my config and queued torrents)

Cheers

[pkishino]

Version is just the compose version, this has nothing to do with the container.
You need to pull the latest version.. if you are using cli only just run
docker pull haugene/transmission-openvpn:latest
Then redeploy the container