This interval can be changed with the -interval flag or WATCHTOWER_POLL_INTERVAL environment variable. In our case, we will be monitoring Myst container only.īy default Watchtower polls your repository for image updates every 86400 seconds, or 24 hours. Both methods are functionally the same in creating a container running Watchtower, then pointing it towards a container you wish to keep automatically updated. ![]() Watchtower works both with Docker’s run command and Docker Compose to automatically update a Docker image. Automatically update Docker container image with Watchtower We now assume that Docker Desktop for Windows or Mac has been successfully installed and Docker Service is up and running. The "whale" icon in the notification area indicates that Docker is running, and accessible from a terminal. When the installation finishes, Docker starts automatically.
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