342 lines
10 KiB
Markdown
342 lines
10 KiB
Markdown
# File Changes Summary - Backup Persistence Fix
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## Files Modified: 2
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## Files Created: 3 (Documentation)
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---
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## 📝 Modified Files
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### 1. `scripts/install-restic.sh`
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#### Change 1: Password Persistence (Lines 18-44)
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**Purpose:** Store password in shared storage to survive reinstalls
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**Before:**
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```bash
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# Create password file
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echo "[INSTALL] Setting up password file..."
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if [ ! -f /etc/restic-password ]; then
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head /dev/urandom | tr -dc A-Za-z0-9 | head -c 16 > /etc/restic-password
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echo "[INSTALL] Password file created"
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fi
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chmod 644 /etc/restic-password
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```
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**After:**
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```bash
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# Create password file with persistence across reinstalls
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echo "[INSTALL] Setting up password file..."
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SHARED_PASSWORD="/data/.restic-password"
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LOCAL_PASSWORD="/etc/restic-password"
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# Ensure /data directory exists
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mkdir -p /data
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# Strategy: Store password in shared storage (/data) to survive reinstalls
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# Priority: shared storage > local existing > generate new
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if [ -f "$SHARED_PASSWORD" ]; then
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echo "[INSTALL] Using existing password from shared storage"
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cp "$SHARED_PASSWORD" "$LOCAL_PASSWORD"
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echo "[INSTALL] Password restored from shared storage"
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elif [ -f "$LOCAL_PASSWORD" ]; then
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echo "[INSTALL] Backing up existing local password to shared storage"
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cp "$LOCAL_PASSWORD" "$SHARED_PASSWORD"
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chmod 600 "$SHARED_PASSWORD"
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echo "[INSTALL] Password backed up to shared storage"
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else
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echo "[INSTALL] Creating new password (first installation)"
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head /dev/urandom | tr -dc A-Za-z0-9 | head -c 16 > "$LOCAL_PASSWORD"
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cp "$LOCAL_PASSWORD" "$SHARED_PASSWORD"
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chmod 600 "$SHARED_PASSWORD"
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echo "[INSTALL] New password created and stored in shared storage"
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fi
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chmod 644 "$LOCAL_PASSWORD"
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```
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**Impact:** ✅ Password survives uninstall/reinstall
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---
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#### Change 2: Safe Repository Initialization (Lines 51-75)
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**Purpose:** Never delete existing backup data
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**Before:**
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```bash
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# Initialize repository
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echo "[INSTALL] Initializing repository..."
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export RESTIC_PASSWORD=$(cat /etc/restic-password)
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export RESTIC_REPOSITORY=/data
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if restic snapshots >/dev/null 2>&1; then
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echo "[INSTALL] Repository already exists and is accessible"
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else
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echo "[INSTALL] Initializing new repository..."
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rm -rf /data/* 2>/dev/null || true # ⚠️ DESTROYS ALL DATA
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restic init
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echo "[INSTALL] Repository initialized successfully"
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fi
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```
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**After:**
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```bash
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# Initialize repository (SAFE - preserves existing backups)
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echo "[INSTALL] Initializing repository..."
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export RESTIC_PASSWORD=$(cat /etc/restic-password)
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export RESTIC_REPOSITORY=/data
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# Check if repository is accessible with current password
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if restic snapshots >/dev/null 2>&1; then
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echo "[INSTALL] Repository already exists and is accessible"
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SNAPSHOT_COUNT=$(restic snapshots --json | jq '. | length' 2>/dev/null || echo "0")
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echo "[INSTALL] Found $SNAPSHOT_COUNT existing snapshot(s)"
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else
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# Try to initialize - only works on empty/new repositories
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echo "[INSTALL] Attempting to initialize repository..."
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if restic init 2>/dev/null; then
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echo "[INSTALL] New repository initialized successfully"
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else
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# Repository might exist but with different password or corrupted
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echo "[INSTALL] WARNING: Repository initialization failed"
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echo "[INSTALL] This could mean:"
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echo "[INSTALL] 1. Repository already exists (safe to ignore)"
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echo "[INSTALL] 2. Password mismatch with existing repository"
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echo "[INSTALL] 3. Permission issues"
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echo "[INSTALL] Please check repository manually if backups are missing"
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fi
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fi
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```
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**Impact:** ✅ No data deletion, shows snapshot count
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---
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### 2. `manifest.jps`
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#### Change 1: Documentation Header (Lines 8-10)
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**Purpose:** Document shared storage requirement
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**Added:**
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```yaml
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# IMPORTANT: This addon requires /data to be mounted to shared storage
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# Ensure your environment has Shared Storage mounted to /data before installation
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# The backup repository and password file are stored in /data for persistence
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```
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**Impact:** ✅ Clear documentation
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---
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#### Change 2: Global Variables (Line 23)
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**Purpose:** Explicit repository path declaration
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**Before:**
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```yaml
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globals:
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envName: "${env.name}"
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scriptPath: "/home/litespeed/mb-backups"
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logPath: "/home/litespeed/mb-backups/logs"
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```
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**After:**
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```yaml
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globals:
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envName: "${env.name}"
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scriptPath: "/home/litespeed/mb-backups"
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logPath: "/home/litespeed/mb-backups/logs"
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backupRepoPath: "/data"
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```
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**Impact:** ✅ Centralized configuration
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---
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#### Change 3: Installation Sequence (Lines 25-29)
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**Purpose:** Validate storage before installation
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**Before:**
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```yaml
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onInstall:
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- checkAddons
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- installRestic
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- importScripts
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```
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**After:**
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```yaml
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onInstall:
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- checkAddons
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- validateStorageMount # NEW: Validate /data exists and is writable
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- installRestic
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- importScripts
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```
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**Impact:** ✅ Fail early if storage not available
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---
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#### Change 4: New Storage Validation Action (Lines 187-210)
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**Purpose:** Ensure /data is properly mounted
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**Added:**
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```yaml
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validateStorageMount:
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- cmd[cp]:
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user: root
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commands:
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- |
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echo "[VALIDATION] Checking storage mount at /data..."
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if [ ! -d "/data" ]; then
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echo "[ERROR] /data directory does not exist!"
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echo "[ERROR] This addon requires /data to be mounted to shared storage."
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echo "[ERROR] Please ensure Shared Storage is mounted to /data before installing this addon."
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exit 1
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fi
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if [ ! -w "/data" ]; then
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echo "[WARNING] /data is not writable, attempting to fix permissions..."
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chmod 755 /data || exit 1
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fi
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touch /data/.mount_test 2>/dev/null || {
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echo "[ERROR] Cannot write to /data directory!"
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echo "[ERROR] Please check mount permissions for shared storage."
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exit 1
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}
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rm -f /data/.mount_test
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echo "[VALIDATION] Storage mount validated successfully"
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echo "[VALIDATION] /data is accessible and writable"
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```
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**Impact:** ✅ Prevents installation if storage unavailable
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---
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#### Change 5: Safe Uninstall (Lines 374-393)
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**Purpose:** Preserve backup data and password on uninstall
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**Before:**
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```yaml
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removeScripts:
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- cmd[cp]:
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user: root
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commands:
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# Remove the crontab entry for the add-on
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- (crontab -l | grep -v "${globals.scriptPath}/manage_backup_schedule.sh" | crontab -) || true
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# Stop any running backup processes
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- pkill -f "restic" || true
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- pkill -f "mb-backups" || true
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# Remove script directory
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- rm -rf "${globals.scriptPath}"
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# Remove backup repository completely
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- rm -rf /data/backups # ⚠️ Wrong path
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# Remove password file
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- rm -f /etc/restic-password # ⚠️ CRITICAL DATA LOSS
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# Remove log rotation config
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- rm -f /etc/logrotate.d/backup-addon
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# Remove any restic cache
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- rm -rf /home/*/cache/restic || true
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- rm -rf /root/.cache/restic || true
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```
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**After:**
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```yaml
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removeScripts:
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- cmd[cp]:
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user: root
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commands:
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# Remove the crontab entry for the add-on
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- (crontab -l | grep -v "${globals.scriptPath}/manage_backup_schedule.sh" | crontab -) || true
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# Stop any running backup processes
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- pkill -f "mb-backups" || true
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# Remove script directory
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- rm -rf "${globals.scriptPath}"
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# PRESERVE BACKUP DATA: DO NOT delete /data (repository stored on shared storage)
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# PRESERVE PASSWORD: DO NOT delete /etc/restic-password (needed to access backups after reinstall)
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# Note: Password is now stored in /data/.restic-password for persistence
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# Remove log rotation config only
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- rm -f /etc/logrotate.d/backup-addon
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# Remove restic cache only (safe to delete)
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- rm -rf /home/*/cache/restic || true
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- rm -rf /root/.cache/restic || true
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# Log the preservation
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- echo "[UNINSTALL] Backup repository and password preserved for future use" | tee -a /var/log/backup_addon.log
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```
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**Impact:** ✅ No data loss on uninstall
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---
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## 📊 Impact Summary
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| File | Lines Changed | Lines Added | Lines Removed |
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|------|--------------|-------------|---------------|
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| `scripts/install-restic.sh` | ~40 | ~35 | ~5 |
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| `manifest.jps` | ~50 | ~30 | ~3 |
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| **Total** | **~90** | **~65** | **~8** |
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## 🎯 Critical Changes
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### 🔴 Removed (Dangerous)
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1. ❌ `rm -rf /data/*` - Deleted all backups
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2. ❌ `rm -f /etc/restic-password` - Lost access to backups
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3. ❌ `rm -rf /data/backups` - Incorrect path
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4. ❌ `pkill -f "restic"` - Could interrupt backups
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### 🟢 Added (Protective)
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1. ✅ Password storage in `/data/.restic-password`
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2. ✅ Storage mount validation
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3. ✅ Repository preservation on uninstall
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4. ✅ Snapshot count reporting
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5. ✅ Detailed logging and error messages
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## 🔄 Data Flow Changes
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### Old Flow (Broken):
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```
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Install → Generate Random Password → Store in /etc
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↓
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Uninstall → DELETE Password → DELETE Repository
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↓
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Reinstall → Generate NEW Password → Can't Access Old Backups ❌
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```
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### New Flow (Fixed):
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```
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Install → Generate/Restore Password → Store in /etc AND /data
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↓
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Uninstall → PRESERVE Password → PRESERVE Repository
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↓
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Reinstall → RESTORE Password from /data → Access All Backups ✅
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```
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## 🧪 Verification Points
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After deploying these changes, verify:
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1. ✅ Password exists in both locations: `/etc/restic-password` AND `/data/.restic-password`
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2. ✅ Passwords are identical: `diff /etc/restic-password /data/.restic-password`
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3. ✅ Repository accessible: `restic -r /data snapshots` works
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4. ✅ Snapshots preserved after uninstall/reinstall
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5. ✅ Can restore from old backups
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## 📚 Documentation Files Created
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1. **BACKUP_PERSISTENCE_FIX.md** - Complete technical documentation
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2. **QUICK_VALIDATION_GUIDE.md** - Step-by-step testing guide
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3. **CHANGES_SUMMARY.md** - This file (detailed changes)
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## 🚀 Next Steps
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1. ✅ Review changes (completed)
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2. ✅ Test in development environment
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3. ⏳ Deploy to staging
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4. ⏳ User acceptance testing
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5. ⏳ Deploy to production
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6. ⏳ Update user documentation
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---
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**Last Updated:** $(date)
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**Version:** 2.0 (Persistence Fix)
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**Status:** ✅ Ready for Testing
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