Update docs

README.md

@@ -10,10 +10,12 @@ Backup solution for Docker volumes based on Duplicity
 
 ## Usage
 
-> **Warning**: This section is outdated. Update coming soon!
+> **Warning**: The following instructions might be outdated, let me know if something doesn't work!
 
 > **Note**: The following instructions assume Google Drive is used as a storage backend; refer to [duplicity's man page](https://duplicity.us/stable/duplicity.1.html) to find out how to configure different backends!
 
+### Backup
+
 1. Create a new volume in Docker with the name `duplicity_credentials`:
 
     ```console
@@ -45,19 +47,13 @@ Backup solution for Docker volumes based on Duplicity
     get_refresh_token: True
     ```
 
-5. Add the following keys to the `docker-compose.yml` file of the project you want to backup:
+5. Add the following keys to the `compose.yml` file of the project you want to backup:
 
     ```console
-    # edit ./docker-compose.yml
+    # edit ./compose.yml
     ```
 
-    1. If you haven't already, upgrade your `docker-compose.yml` file to version 3.9:
-
-        ```yml
-        version: "3.9"
-        ```
-
-    2. Connect the previously created `duplicity_credentials` volume to the project:
+    1. Connect the previously created `duplicity_credentials` volume to the project:
 
         ```yml
         volumes:
@@ -65,7 +61,7 @@ Backup solution for Docker volumes based on Duplicity
                 external: true
         ```
 
-    3. Setup the two previously created files as Docker secrets:
+    2. Setup the two previously created files as Docker secrets:
 
         ```yml
         secrets:
@@ -75,7 +71,7 @@ Backup solution for Docker volumes based on Duplicity
                 file: "/root/secrets/duplicity/client_config.yml"
         ```
 
-    4. Add the following service:
+    3. Add the following service:
 
         ```yml
         services:
@@ -109,3 +105,89 @@ Backup solution for Docker volumes based on Duplicity
     ```console
     # docker compose up -d && docker compose logs -f
     ```
+
+### Restore
+
+1. Create a new volume in Docker with the name `duplicity_credentials`:
+
+    ```console
+    # docker volume create duplicity_credentials
+    ```
+
+2. Create a new file in the host system with the name `/root/secrets/backup/passphrase.txt`, and enter in it a secure passphrase to use to encrypt files:
+
+    ```console
+    # echo 'CorrectHorseBatteryStaple' >> /root/secrets/backup/passphrase.txt
+    ```
+
+3. [Obtain *Desktop Application* OAuth credentials from the Google Cloud Console.](https://console.cloud.google.com/apis/credentials)
+
+4. Create a new file in the host system with the name `/root/secrets/backup/client_config.yml`, and enter the following content in it:
+
+    ```console
+    # edit /root/secrets/backup/client_config.yml
+    ```
+
+    ```yml
+    client_config_backend: settings
+    client_config:
+        client_id: "YOUR_GOOGLE_CLIENT_ID_GOES_HERE"
+        client_secret: "YOUR_GOOGLE_CLIENT_SECRET_GOES_HERE"
+    save_credentials: True
+    save_credentials_backend: file
+    save_credentials_file: "/var/lib/duplicity/credentials"
+    get_refresh_token: True
+    ```
+
+5. Add the following keys to the `compose.yml` file of the project you want to backup:
+
+    ```console
+    # edit ./compose.yml
+    ```
+
+    1. Connect the previously created `duplicity_credentials` volume to the project:
+
+        ```yml
+        volumes:
+            duplicity_credentials:
+                external: true
+        ```
+
+    2. Setup the two previously created files as Docker secrets:
+
+        ```yml
+        secrets:
+            duplicity_passphrase:
+                file: "/root/secrets/duplicity/passphrase.txt"
+            google_client_config:
+                file: "/root/secrets/duplicity/client_config.yml"
+        ```
+
+    3. Add the following service:
+
+        ```yml
+        services:
+            duplicity:
+                image: "ghcr.io/steffo99/backup-duplicity:latest"
+                restart: no
+                secrets:
+                    - google_client_config
+                    - duplicity_passphrase
+                volumes:
+                    - "duplicity_credentials:/var/lib/duplicity" 
+                    # Mount whatever you want to backup in subdirectories of /mnt
+                    - ".:/mnt/compose"  # Backup the current directory?
+                    - "data:/mnt/data"  # Backup a named volume?
+                environment:
+                    MODE: "restore"  # Change this to "restore" to restore the latest backup
+                    DUPLICITY_TARGET_URL: "pydrive://YOUR_GOOGLE_CLIENT_ID_GOES_HERE/Duplicity/this"  # Change this to the Drive directory you want to backup files to https://man.archlinux.org/man/duplicity.1.en#URL_FORMAT
+                    # Don't touch these, they allow the program to read the secrets
+                    DUPLICITY_PASSPHRASE_FILE: "/run/secrets/duplicity_passphrase"
+                    GOOGLE_DRIVE_SETTINGS: "/run/secrets/google_client_config"
+        ```
+
+6. Log in to Google Drive and perform the restore with:
+
+    ```console
+    # docker compose run -i --entrypoint=/bin/sh duplicity /usr/lib/backup-duplicity/restore.sh
+    ```