Gestalt Amadeus

Backup solution for Docker volumes based on Duplicity

Usage

Backup with Google Drive

Note

Other backends are available, but haven't been tested. Please let me know if you want to try using them so I can help you out with setting them up!

Create a new Docker volume with the name ga_cache, which Duplicity will use to temporarily store previous backups:
```
docker volume create "ga_cache"
```
Create a new Docker volume with the name ga_credentials, which Duplicity will use to store Google Drive API credentials:
```
docker volume create "ga_credentials"
```

Create a new Docker secret with the name ga_passphrase containing the password that will be used to encrypt backups before uploading them:

# This command will generate a secure random password, print it to the console, and use it to create a Docker secret 
cat /dev/urandom | LC_ALL="C" tr --delete --complement '[:graph:]' | head --bytes 32 | tee "/dev/stderr" | docker secret create "ga_passphrase" -

Use the Google Cloud Console to create new OAuth credentials for a Desktop Application.
Download the JSON credential file, and use it to create a new Docker secret with the name ga_gdrive_client_secret:
```
docker secret create "ga_gdrive_client_secret" ./client_secret*
```

Create a new directory in Google Drive, open it, and copy the final part of the URL:

https://drive.google.com/drive/u/0/folders/1_8rQ4E8ssoN-guFrGs7CC2IFofXBaimi
                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                                     copy this part

Add your Gestalt Amadeus configuration in your Compose project at compose.yml:

x-gestalt-automata:
    # Set this to "restore" to recover files from the last available backup.
    ga_mode: &ga_mode
        "backup"
    # The URL where your backups should be uploaded to.
    # For Google Drive, replace:
    # - `1_AAAAAAAAAA-BBBBBBBBBBBBBBBBBBBB` with the final part of the URL you've previously copied
    # - `111111111111-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.apps.googleusercontent.com` with the value of the `.installed.client_id` key of the Google client_secret file you've previously downloaded
    ga_backup_to: &ga_backup_to
        "gdrive://111111111111-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.apps.googleusercontent.com/${COMPOSE_PROJECT_NAME}?myDriveFolderID=1_AAAAAAAAAA-BBBBBBBBBBBBBBBBBBBB"
    # If you're planning to use ntfy, set this to the full URL of the topic you'd like to receive notifications at.
    # An example: `ntfy.sh/ko7OC50phzmh1ZMQ`
    ga_ntfy: &ntfy
        ""

Merge the following keys to your Compose project at compose.yml:

services:
    ga:
        image: ""
        restart: unless-stopped
        network_mode: host
        stdin_open: true
        tty: true
        volumes:
            - type: bind
              source: "."
              target: "/mnt"
            - type: volume
              source: ga_credentials
              target: "/var/lib/duplicity"
            - type: volume
              source: ga_cache
              target: "/usr/lib/duplicity/.cache/duplicity"
        environment:
            MODE: *ga_mode
            DUPLICITY_TARGET_URL: *ga_backup_to
            NTFY: *ga_ntfy
            NTFY_TAGS: "host-${HOSTNAME},${COMPOSE_PROJECT_NAME}"
            DUPLICITY_PASSPHRASE_FILE: "/run/secrets/ga_passphrase"
            GOOGLE_CLIENT_SECRET_JSON_FILE: "/run/secrets/ga_gdrive_client_secret"
            GOOGLE_OAUTH_LOCAL_SERVER_HOST: "localhost"
            GOOGLE_OAUTH_LOCAL_SERVER_PORT: "80"
        secrets:
            - ga_passphrase
            - ga_gdrive_client_secret

volumes:
    ga_cache:
        external: true
    ga_credentials:
        external: true

secrets:
    ga_passphrase:
        external: true
    ga_gdrive_client_secret:
        external: true

Bring up the Compose project:
```
docker compose up --detach
```
Pay attention to the logs; if this is the first container you're setting up Gestalt Automata on the host, you'll be asked to login with Google before the backup can proceed:
```
docker compose logs --follow ga
```
```
duplicity-1  | Please visit this URL to authorize this application: https://accounts.google.com/o/oauth2/auth
```
Complete the authentication to proceed.
Caution

For authentication to work correctly after Google's removal of the OOB Flow, your http://localhost:80 address needs to match the http://localhost:80 of the Gestalt Amadeus container.

This is not an issue if you can launch a browser on the same machine you're configuring Gestalt Amadeus, but it might be troublesome for non-graphical servers, where this is not possible.

As a quick band-aid to the issue, you can temporarily set up an SSH tunnel towards the server for the duration of the authentication process:
```
# This unfortunately requires root access, since the port we have to tunnel, 80, has a number lower than 1024.
sudo ssh -L 80:80 yourserver
```
You should be done! Make sure backups are appearing in the Google Drive directory you've configured.

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Gestalt Amadeus

Usage

Backup with Google Drive

5.7 KiB

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