feat: add Docker backup script with container lifecycle, compression, and notifications.

docker_backup.sh

@@ -0,0 +1,117 @@
+#!/bin/bash
+
+# === Load configuration from .env ===
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+if [[ -f "$SCRIPT_DIR/.env" ]]; then
+    source "$SCRIPT_DIR/.env"
+else
+    echo "[$(date)] ❌ Missing .env file in $SCRIPT_DIR"
+    exit 1
+fi
+
+# Ensure backup directory exists
+mkdir -p "$BACKUP_DIR"
+
+# === Timestamp & File Setup ===
+TIMESTAMP=$(date +"%Y-%m-%d_%H-%M-%S")
+OUTPUT_FILE="$BACKUP_DIR/docker_backup_$TIMESTAMP.tar.gz"
+LOG_FILE="$BACKUP_DIR/docker_backup_$TIMESTAMP.log"
+
+# === Logging helper ===
+log() {
+    echo "[$(date)] $1" | tee -a "$LOG_FILE"
+}
+
+# === Uptime Kuma Check-in ===
+uptime_kuma_checkin() {
+    if [[ -n "$UPTIME_KUMA_URL" && -n "$UPTIME_KUMA_API_KEY" ]]; then
+        curl -s "${UPTIME_KUMA_URL}/api/push/${UPTIME_KUMA_API_KEY}?status=up&msg=OK" > /dev/null
+        log "✅ Uptime Kuma check-in sent."
+    fi
+}
+
+# === Gotify Error Notification ===
+gotify_error_notify() {
+    local summary="Docker backup errors on $(hostname):\n$1"
+    if [[ -n "$GOTIFY_PUSH_URL" && -n "$GOTIFY_PUSH_KEY" ]]; then
+        curl -s -X POST "${GOTIFY_PUSH_URL}/message?token=${GOTIFY_PUSH_KEY}" \
+            -F "title=[${BACKUP_TAG}] Docker Backup Error on $(hostname)" \
+            -F "message=$(echo -e "$summary" | head -c 1000)" \
+            -F "priority=5" > /dev/null
+        log "⚠️ Gotify error notification sent."
+    fi
+}
+
+# === Stop Containers ===
+stop_containers() {
+    log "🛑 Stopping Docker containers"
+    for container in ${DOCKER_CONTAINERS[@]}; do
+        docker stop "$container" >> "$LOG_FILE" 2>&1
+        if [[ $? -eq 0 ]]; then
+            log "✅ Stopped container: $container"
+        else
+            log "❌ Failed to stop container: $container"
+        fi
+    done
+}
+
+# === Start Containers ===
+start_containers() {
+    log "🚀 Starting Docker containers"
+    for container in ${DOCKER_CONTAINERS[@]}; do
+        docker start "$container" >> "$LOG_FILE" 2>&1
+        if [[ $? -eq 0 ]]; then
+            log "✅ Started container: $container"
+        else
+            log "❌ Failed to start container: $container"
+        fi
+    done
+}
+
+# === Backup Directories ===
+backup_directories() {
+    log "📦 Backing up directories"
+    tar -czf "$OUTPUT_FILE" ${DIRECTORIES_TO_BACKUP[@]} >> "$LOG_FILE" 2>&1
+    if [[ $? -eq 0 ]]; then
+        log "✅ Backup created at $OUTPUT_FILE"
+    else
+        log "❌ Failed to create backup archive"
+        gotify_error_notify "Backup failed while archiving directories."
+        exit 1
+    fi
+}
+
+# === Cleanup Old Backups and Logs ===
+cleanup_old_files() {
+    log "🧹 Cleaning up files older than $RETENTION_DAYS days"
+    find "$BACKUP_DIR" \( -name "docker_backup_*.tar.gz" -o -name "docker_backup_*.log" \) -type f -mtime +$RETENTION_DAYS -exec rm -f {} \;
+}
+
+# === Error Scanning ===
+scan_logs_for_errors() {
+    log "🔍 Scanning logs for errors"
+    ERRORS=""
+    while IFS= read -r logfile; do
+        LOG_ERRORS=$(grep -Ei "error|failed|❌" "$logfile")
+        if [[ -n "$LOG_ERRORS" ]]; then
+            ERRORS+="\n$(basename "$logfile"):\n$LOG_ERRORS\n"
+        fi
+    done < <(find "$BACKUP_DIR" -name "docker_backup_*.log" -type f -mtime -$RETENTION_DAYS)
+
+    if [[ -n "$ERRORS" ]]; then
+        gotify_error_notify "$ERRORS"
+    fi
+}
+
+# === Run the Backup Process ===
+log "🔄 Starting Docker backup job"
+uptime_kuma_checkin
+
+stop_containers
+backup_directories
+start_containers
+
+cleanup_old_files
+scan_logs_for_errors
+
+log "✅ Docker backup job completed"