From c303a8b452efda2cbdf0be183cc1c99ffe2c175d Mon Sep 17 00:00:00 2001
From: "Kevin Veen-Birkenbach [aka. Frantz]" <kevin@veen.world>
Date: Thu, 19 Aug 2021 13:43:22 +0200
Subject: [PATCH] Added draft for backup by volume instead of container

---
 docker-volume-backup.sh | 47 +++++++++++++++++++++++------------------
 1 file changed, 26 insertions(+), 21 deletions(-)

diff --git a/docker-volume-backup.sh b/docker-volume-backup.sh
index e5e3551..e2b9e3b 100644
--- a/docker-volume-backup.sh
+++ b/docker-volume-backup.sh
@@ -1,29 +1,34 @@
 #!/bin/bash
-# If rsync stucks consider: 
+# Just backups volumes of running containers
+# If rsync stucks consider:
 # @see https://stackoverflow.com/questions/20773118/rsync-suddenly-hanging-indefinitely-during-transfers
+#
 backup_time="$(date '+%Y%m%d%H%M%S')";
 backups_folder="/Backups/";
-for docker_container_name in $(docker ps --format '{{.Names}}');
+for volume_name in $(docker volume ls --format '{{.Name}}');
 do
-  echo "stop container: $docker_container_name" && docker stop "$docker_container_name"
-  for source_path in $(docker inspect --format '{{ range .Mounts }}{{ if eq .Type "volume" }}{{ println .Destination }}{{ end }}{{ end }}' "$docker_container_name");
+  for docker_container_name in $(docker ps -a --filter volume=$volume_name --format '{{.Names}}');
   do
-    repository_name="$(cd "$(dirname "$(readlink -f "${0}")")" && basename `git rev-parse --show-toplevel`)";
-    machine_id="$(sha256sum /etc/machine-id | head -c 64)";
-    backup_repository_folder="$backups_folder$machine_id/$repository_name/";
-    destination_path="$backup_repository_folder""latest/$docker_container_name$source_path";
-    log_path="$backup_repository_folder""log.txt";
-    backup_dir_path="$backup_repository_folder""diffs/$backup_time/$docker_container_name$source_path";
-    if [ -d "$destination_path" ]
-      then
-        echo "backup: $source_path";
-      else
-        echo "first backup: $source_path"
-        mkdir -vp "$destination_path";
-        mkdir -vp "$backup_dir_path";
-    fi
-    docker run --rm --volumes-from "$docker_container_name" -v "$backups_folder:$backups_folder" "kevinveenbirkenbach/alpine-rsync" sh -c "
-    rsync -abP --delete --delete-excluded --log-file=$log_path --backup-dir=$backup_dir_path '$source_path/' $destination_path";
+    echo "stop container: $docker_container_name" && docker stop "$docker_container_name"
+    for source_path in $(docker inspect --format '{{ range .Mounts }}{{ if eq .Type "volume" }}{{ println .Destination }}{{ end }}{{ end }}' "$docker_container_name");
+    do
+      repository_name="$(cd "$(dirname "$(readlink -f "${0}")")" && basename `git rev-parse --show-toplevel`)";
+      machine_id="$(sha256sum /etc/machine-id | head -c 64)";
+      backup_repository_folder="$backups_folder$machine_id/$repository_name/";
+      destination_path="$backup_repository_folder""latest/$docker_container_name$source_path";
+      log_path="$backup_repository_folder""log.txt";
+      backup_dir_path="$backup_repository_folder""diffs/$backup_time/$docker_container_name$source_path";
+      if [ -d "$destination_path" ]
+        then
+          echo "backup: $source_path";
+        else
+          echo "first backup: $source_path"
+          mkdir -vp "$destination_path";
+          mkdir -vp "$backup_dir_path";
+      fi
+      docker run --rm --volumes-from "$docker_container_name" -v "$backups_folder:$backups_folder" "kevinveenbirkenbach/alpine-rsync" sh -c "
+      rsync -abP --delete --delete-excluded --log-file=$log_path --backup-dir=$backup_dir_path '$source_path/' $destination_path";
+    done
+    echo "start container: $docker_container_name" && docker start "$docker_container_name";
   done
-  echo "start container: $docker_container_name" && docker start "$docker_container_name";
 done