With watchtower you can update the running version of your containerized app simply by pushing a new image to the Docker Hub. Watchtower will pull down your new image, gracefully shut down your existing container and restart it with the same options that were used when it was deployed initially
Code Source: GitHub
Skip to Docker Run Code / Skip to Compose & Portainer Code
Before we start, please ensure you have Docker installed. This can be installed through the Synology Package Center.
Create the Scheduled Task
We will now head into Control Panel > Task Scheduler > Create > Scheduled Task and click User-defined script. (see demonstration)
Configure the Scheduled Task
In the window that appears, insert the following:
In the General tab, In the Task field, enter Watchtower. From the User list, select root. Uncheck the Enabled option.
In the Schedule tab, Select Run on the following date (make sure It’s today’s date). Now select Do not repeat.
In the Task Settings tab, under Notification, You can choose to turn this on, otherwise skip this. Now copy-paste the following code into the Run command area. Now click OK.
docker run -d \ --name watchtower \ -v /var/run/docker.sock:/var/run/docker.sock \ containrrr/watchtower
Accept the warning prompt
When the below warning appears, press OK.
Run the Scheduled Task
You will now see your list of tasks. Select Watchtower, now press Run.
When asked to run, press Yes.
Your app is now Installed
The installation process of Watchtower has now finished. Give it a few seconds to appear in your Docker list.
That’s it. Your Docker container will now automatically update your other containers
Docker Compose and Portainer
If you would prefer to install with Docker Compose or Portainer, use the following code. You can also view a demonstration here.
version: '3.3' services: watchtower: container_name: watchtower volumes: - '/var/run/docker.sock:/var/run/docker.sock' image: containrrr/watchtower
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