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https://github.com/muesli/docker-backup

A tool to create & restore complete, self-contained backups of Docker containers
https://github.com/muesli/docker-backup

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A tool to create & restore complete, self-contained backups of Docker containers

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docker-backup

=============



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[![Go ReportCard](https://goreportcard.com/badge/muesli/docker-backup)](https://goreportcard.com/report/muesli/docker-backup)

[![GoDoc](https://godoc.org/github.com/golang/gddo?status.svg)](https://pkg.go.dev/github.com/muesli/docker-backup)



A tool to create & restore complete, self-contained backups of Docker containers



# What's the issue



Docker services usually have a bunch of volatile data volumes that need to be

backed up. Backing up an entire (file)system is easy, but often enough you just

want to create a backup of a single (or a few) containers, maybe to restore them

on another system later.



Some services, such as databases, also need to be aware (flushed/synced/paused)

of an impending backup. The backup should be run on the Docker host, as you

don't want to have a backup client configured & running in every single

container either, since this would add a lot of maintenance & administration

overhead.



`docker-backup` directly connects to Docker, analyzes a container's mounts &

volumes, and generates a list of dirs & files that need to be backed up on the

host system. This also collects all the metadata information associated with a

container, so it can be restored or cloned on a different host, including its

port-mappings and data volumes.



The generated list can either be fed to an existing backup solution or

`docker-backup` can directly create a `.tar` image of your container, so you can

simply copy it to another machine.



## Installation



`docker-backup` requires Go 1.11 or higher. Make sure you have a working Go

environment. See the [install instructions](https://golang.org/doc/install.html).



`docker-backup` works with Docker hosts running Docker 18.02 (API version 1.36)

and newer.



### Packages



- Arch Linux: [docker-backup](https://aur.archlinux.org/packages/docker-backup/)



### From source



    git clone https://github.com/muesli/docker-backup.git

    cd docker-backup

    go build



Run `docker-backup --help` to see a full list of options.



## Usage



### Creating a Backup



To backup a single container start `docker-backup` with the `backup` command and

supply the ID of the container:



    docker-backup backup 



This will create a `.json` file with the container's metadata, as well as a file

containing all the volumes that need to be backed up with an external tool like

[restic](https://restic.net/) or [borgbackup](https://www.borgbackup.org/).



If you want to directly create a `.tar` file containing all the container's

data, simply run:



    docker-backup backup --tar 



You can also backup all running containers on the host with the `--all` flag:



    docker-backup backup --all



To backup all containers (regardless of their current running state), run:



    docker-backup backup --all --stopped



With the help of `--launch` you can directly launch a backup program with the

generated file-list supplied as an argument:



    docker-backup backup --all --launch "restic -r /dest backup --password-file pwfile --tag %tag --files-from %list"



### Restoring a Backup



To restore a container, run `docker-backup` with the `restore` command:



    docker-backup restore 



`docker-backup` will automatically detect whether you supplied a `.tar` or

`.json` file and restore the container, including all its port-mappings and data

volumes.



If you want to start the container once the restore has finished, add the

`--start` flag:



    docker-backup restore --start