From 28955abeb664ff90b73fadfd2f250dbb612172fb Mon Sep 17 00:00:00 2001
From: Tyrone Faulhaber <20131658+spectrapulse@users.noreply.github.com>
Date: Fri, 5 Jul 2024 22:36:33 +0200
Subject: [PATCH] Initial Commit

---
 .github/workflows/build.yml | 65 ++++++++++++++++++++++++++++++++
 Dockerfile                  | 26 +++++++++++++
 backup.sh                   | 74 +++++++++++++++++++++++++++++++++++++
 3 files changed, 165 insertions(+)
 create mode 100644 .github/workflows/build.yml
 create mode 100644 Dockerfile
 create mode 100644 backup.sh

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..cbd8b25
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,65 @@
+name: Build images
+
+on: 
+  push: 
+  workflow_dispatch:
+
+permissions:
+    packages: write
+    contents: read
+
+jobs:
+  build:
+    name: Build image
+    runs-on: ubuntu-20.04
+    env: 
+      IMAGE: ghcr.io/${{ github.repository }}
+    strategy:
+      fail-fast: true
+      matrix:
+        arch: [ amd64, arm64v8 ]
+        type: [ mariadb, postgresql ]
+        include:
+          - arch: amd64
+            platform: linux/amd64
+          - arch: arm64v8
+            platform: linux/arm64
+    steps: 
+      - uses: actions/checkout@v4
+      - uses: docker/setup-qemu-action@v3
+      - uses: docker/metadata-action@v5
+        id: image-metadata
+        with: 
+          images: ghcr.io/${{ github.repository }}
+          tags: type=raw,value=${{ matrix.type }}-${{ matrix.arch }}
+      - uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - uses: docker/build-push-action@v5
+        with:
+          push: true
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          platforms: ${{ matrix.platform }}
+          tags: ${{ steps.image-metadata.outputs.tags }}
+          build-args: IMAGE_TAG=${{ matrix.type }}
+
+  merge:
+    runs-on: ubuntu-20.04
+    needs: [ build ]
+    strategy:
+      fail-fast: true
+      matrix:
+        type: [ mariadb, postgresql ]
+    steps: 
+      - uses: actions/checkout@v4
+      - uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - run: |
+          docker buildx imagetools create \
+            --tag ${IMAGE}:${{ matrix.type }} ${IMAGE}:${{ matrix.type }}-{amd64,arm64v8}
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..8d4507b
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,26 @@
+FROM alpine:3.20
+
+ARG IMAGE_TAG
+
+RUN apk add --no-cache \
+    restic \
+    bash \
+    curl \
+    rclone
+
+RUN if [ -z "$IMAGE_TAG" ]; then \
+        echo "No IMAGE_TAG specified. Exiting." && exit 1 \
+    elif [ "$IMAGE_TAG" = "mariadb" ]; then \
+        apk add --no-cache mariadb-client \
+    elif [ "$IMAGE_TAG" = "postgresql"]; then \
+        apk add --no-cache postgresql-client \
+    fi
+
+
+COPY backup.sh /usr/local/bin/backup.sh
+
+RUN chmod +x /usr/local/bin/backup.sh 
+
+VOLUME [ "/backups" ]
+
+ENTRYPOINT [ "/usr/local/bin/backup.sh" ]
\ No newline at end of file
diff --git a/backup.sh b/backup.sh
new file mode 100644
index 0000000..759b578
--- /dev/null
+++ b/backup.sh
@@ -0,0 +1,74 @@
+#! /usr/bin/env sh
+
+# restic password (optional)
+RESTIC_PASSWORD=${RESTIC_PASSWORD:-""}
+
+# Database Credentials
+DB_HOST=${DB_HOST?Variable not set}
+DB_NAME=${DB_NAME?Variable not set}
+DB_USERNAME=${DB_USERNAME?Variable not set}
+DB_PASSWORD=${DB_PASSWORD?Variable not set}
+
+# Destinations
+BACKUP_DIR=${BACKUP_DIR:-"/backups"}
+if [ -z "$RESTIC_PASSWORD" ]; then
+    BACKUP_FILE="${BACKUP_DIR}/${DB_NAME}-$(date +%Y%m%d%H%M%S).sql"
+else
+    BACKUP_FILE="/tmp/${DB_NAME}.sql"
+fi
+
+# Rclone remote (optional)
+RCLONE_REMOTE=${RCLONE_REMOTE:-""}
+RCLONE_CONFIG=${RCLONE_CONFIG:-"/rclone.conf"}
+
+# Create backup dir if it doesn't exist
+mkdir -p "${BACKUP_DIR}"
+
+# Perform the database dump based on what db utility is installed
+if command -v mysqldump >/dev/null 2>&1; then
+    mysqldump -h "$DB_HOST" -P "${DB_PORT:-'3306'}" -u "$DB_USERNAME" -p"$DB_PASSWORD" "$DB_NAME" > "$BACKUP_FILE"
+elif command -v pg_dump >/dev/null 2>&1; then 
+    export PGPASSWORD="${DB_PASSWORD}"
+    pg_dump -h "$DB_HOST" -p "${DB_PORT:-'5432'}" -U "$DB_USERNAME" "$DB_NAME" > "$BACKUP_FILE"
+else
+    echo "This condition should be impossible to reach... What did you do??!!"
+    exit 1
+fi
+
+# Check if the dump was successful
+if [ $? -eq 0 ]; then 
+    echo "Database dump successful: ${BACKUP_FILE}"
+else
+    echo "Database dump failed"
+    exit 1
+fi
+
+# Backup file using Restic if $RESTIC_PASSWORD is set
+if [ -n "$RESTIC_PASSWORD" ]; then
+    echo "$RESTIC_PASSWORD" > /tmp/restic_password
+
+    # Initialize restic repo if it doesn't exist
+    if ! restic --repo "$BACKUP_DIR" snapshots --password-file=/tmp/restic_password &>/dev/null; then 
+        restic init --repo "$BACKUP_DIR" --password-file=/tmp/restic_password
+    fi
+
+    # Backup sql dump file
+    restic --repo "$BACKUP_DIR" backup "$BACKUP_FILE" --tag "sqldump" --host "dbackup" --password-file=/tmp/restic_password
+
+    # Cleanup  
+    [ -n "$RESTIC_PRUNE_ARGS" ] && restic --repo "$BACKUP_DIR" forget --password-file=/tmp/restic_password $RESTIC_PRUNE_ARGS
+
+    rm /tmp/restic_password $BACKUP_FILE
+fi
+
+# Sync backup dir to remote using Rclone if $RCLONE_REMOTE is set
+if [ -n "$RCLONE_REMOTE" ]; then 
+    rclone --config="$RCLONE_CONFIG" sync "$BACKUP_DIR" "$RCLONE_REMOTE"
+
+    if [ $? -eq 0 ]; then 
+        echo "Rclone sync to remote successful"
+    else
+        echo "Rclone sync to remote failed"
+        exit 1
+    fi
+fi