From 189f2c36de260fe3edadc454aca0732798f4a16f Mon Sep 17 00:00:00 2001
From: Michael Housh <michael@mhoush.com>
Date: Thu, 17 Apr 2025 14:00:16 -0400
Subject: [PATCH] feat: Adds restore script.

---
 README.md         | 11 +++++++++++
 docker-backup.sh  | 13 ++++++-------
 docker-restore.sh | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+), 7 deletions(-)
 create mode 100644 docker-restore.sh

diff --git a/README.md b/README.md
index f57e66b..d3d20bb 100644
--- a/README.md
+++ b/README.md
@@ -50,3 +50,14 @@ sudo systemctl start backup.service
 1. Add any extra volumes to backup.
 1. Make script executable `chmod +x docker-backup.sh`
 1. Manually run the script `sudo ./docker-backup.sh`
+
+## Restore
+
+This repository also contains a restore script that can restore the stacks and
+volumes from a backup (hopefully it's never needed!).
+
+### Usage
+
+1. Download the script `wget https://git.housh.dev/homelab/backup/raw/branch/main/docker-restore.sh`
+1. Make script executable `chmod +x docker-restore.sh`
+1. Run the script `sudo ./docker-restore.sh /backups/<backup>.tar.gz`
diff --git a/docker-backup.sh b/docker-backup.sh
index 0a8c09e..5371804 100644
--- a/docker-backup.sh
+++ b/docker-backup.sh
@@ -30,7 +30,7 @@ function copyStacks() {
   local dir="$1/stacks"
   mkdir "$dir"
   for service in "${services[@]}"; do
-    cp -R "$service" "$dir"
+    cp -r --parents "$service" "$dir"
   done
 }
 
@@ -39,17 +39,16 @@ function copyVolumes() {
   local dir="$1/volumes"
   mkdir "$dir"
   for volume in "${volumes[@]}"; do
-    cp -R "$volume" "$dir"
+    cp -r --parents "$volume" "$dir"
   done
 }
 
 function backup() {
   echo "Creating backup..."
-  tar -cvf "/$today.tar" "$1"
-  gzip "/$today.tar"
-  cp -R "/$today.tar.gz" "$backupdir"
+  tar -cvzf "/$today.tar.gz" "$1"
+  cp -r "/$today.tar.gz" "$backupdir"
   # Cleanup temporary files.
-  rm -rf "$1" "/$today.tar" "/$today.tar.gz"
+  rm -rf "$1" "/$today.tar.gz"
 }
 
 function main() {
@@ -57,7 +56,7 @@ function main() {
   stopServices
 
   # Create a temporary directory.
-  local temp="/tmp/$today"
+  local temp="/$today"
   mkdir "$temp"
 
   # copy stack configuration.
diff --git a/docker-restore.sh b/docker-restore.sh
new file mode 100644
index 0000000..a9d588e
--- /dev/null
+++ b/docker-restore.sh
@@ -0,0 +1,46 @@
+#!/bin/bash
+
+debug=${DEBUG:-}
+
+function copyIfNotDebug {
+  if [ -z "$debug" ]; then
+    cp -r "$1" "$2"
+  else
+    echo "$1 -> $2"
+  fi
+}
+
+function copyVolumes() {
+  echo "Copying volumes..."
+  local volumes=($(find "$1/volumes" -maxdepth 1 -mindepth 1 -type d))
+  for volume in "${volumes[@]}"; do
+    local dest="${volume#"$1"/volumes*}"
+    copyIfNotDebug "$volume" "$dest"
+  done
+}
+
+function copyStacks() {
+  echo "Copying stacks..."
+  local stacks=($(find "$1/stacks" -maxdepth 1 -mindepth 1 -type d))
+  for stack in "${stacks[@]}"; do
+    local dest="${stack#"$1"/stacks*}"
+    copyIfNotDebug "$stack" "$dest"
+  done
+}
+
+function main() {
+  local archive="$1"
+  local dir="${archive%*.tar.gz}"
+
+  # unzip the archive.
+  tar -xvf "$archive"
+
+  # copy stacks and volumes to their locations.
+  copyVolumes "$dir"
+  copyStacks "$dir"
+
+  # cleanup
+  rm -rf "$dir"
+}
+
+main "$@"