# File Changes Summary - Backup Persistence Fix

## Files Modified: 2
## Files Created: 3 (Documentation)

---

## 📝 Modified Files

### 1. `scripts/install-restic.sh`

#### Change 1: Password Persistence (Lines 18-44)
**Purpose:** Store password in shared storage to survive reinstalls

**Before:**
```bash
# Create password file
echo "[INSTALL] Setting up password file..."
if [ ! -f /etc/restic-password ]; then
    head /dev/urandom | tr -dc A-Za-z0-9 | head -c 16 > /etc/restic-password
    echo "[INSTALL] Password file created"
fi
chmod 644 /etc/restic-password
```

**After:**
```bash
# Create password file with persistence across reinstalls
echo "[INSTALL] Setting up password file..."
SHARED_PASSWORD="/data/.restic-password"
LOCAL_PASSWORD="/etc/restic-password"

# Ensure /data directory exists
mkdir -p /data

# Strategy: Store password in shared storage (/data) to survive reinstalls
# Priority: shared storage > local existing > generate new
if [ -f "$SHARED_PASSWORD" ]; then
    echo "[INSTALL] Using existing password from shared storage"
    cp "$SHARED_PASSWORD" "$LOCAL_PASSWORD"
    echo "[INSTALL] Password restored from shared storage"
elif [ -f "$LOCAL_PASSWORD" ]; then
    echo "[INSTALL] Backing up existing local password to shared storage"
    cp "$LOCAL_PASSWORD" "$SHARED_PASSWORD"
    chmod 600 "$SHARED_PASSWORD"
    echo "[INSTALL] Password backed up to shared storage"
else
    echo "[INSTALL] Creating new password (first installation)"
    head /dev/urandom | tr -dc A-Za-z0-9 | head -c 16 > "$LOCAL_PASSWORD"
    cp "$LOCAL_PASSWORD" "$SHARED_PASSWORD"
    chmod 600 "$SHARED_PASSWORD"
    echo "[INSTALL] New password created and stored in shared storage"
fi
chmod 644 "$LOCAL_PASSWORD"
```

**Impact:** ✅ Password survives uninstall/reinstall

---

#### Change 2: Safe Repository Initialization (Lines 51-75)
**Purpose:** Never delete existing backup data

**Before:**
```bash
# Initialize repository
echo "[INSTALL] Initializing repository..."
export RESTIC_PASSWORD=$(cat /etc/restic-password)
export RESTIC_REPOSITORY=/data

if restic snapshots >/dev/null 2>&1; then
    echo "[INSTALL] Repository already exists and is accessible"
else
    echo "[INSTALL] Initializing new repository..."
    rm -rf /data/* 2>/dev/null || true    # ⚠️ DESTROYS ALL DATA
    restic init
    echo "[INSTALL] Repository initialized successfully"
fi
```

**After:**
```bash
# Initialize repository (SAFE - preserves existing backups)
echo "[INSTALL] Initializing repository..."
export RESTIC_PASSWORD=$(cat /etc/restic-password)
export RESTIC_REPOSITORY=/data

# Check if repository is accessible with current password
if restic snapshots >/dev/null 2>&1; then
    echo "[INSTALL] Repository already exists and is accessible"
    SNAPSHOT_COUNT=$(restic snapshots --json | jq '. | length' 2>/dev/null || echo "0")
    echo "[INSTALL] Found $SNAPSHOT_COUNT existing snapshot(s)"
else
    # Try to initialize - only works on empty/new repositories
    echo "[INSTALL] Attempting to initialize repository..."
    if restic init 2>/dev/null; then
        echo "[INSTALL] New repository initialized successfully"
    else
        # Repository might exist but with different password or corrupted
        echo "[INSTALL] WARNING: Repository initialization failed"
        echo "[INSTALL] This could mean:"
        echo "[INSTALL]   1. Repository already exists (safe to ignore)"
        echo "[INSTALL]   2. Password mismatch with existing repository"
        echo "[INSTALL]   3. Permission issues"
        echo "[INSTALL] Please check repository manually if backups are missing"
    fi
fi
```

**Impact:** ✅ No data deletion, shows snapshot count

---

### 2. `manifest.jps`

#### Change 1: Documentation Header (Lines 8-10)
**Purpose:** Document shared storage requirement

**Added:**
```yaml
# IMPORTANT: This addon requires /data to be mounted to shared storage
# Ensure your environment has Shared Storage mounted to /data before installation
# The backup repository and password file are stored in /data for persistence
```

**Impact:** ✅ Clear documentation

---

#### Change 2: Global Variables (Line 23)
**Purpose:** Explicit repository path declaration

**Before:**
```yaml
globals:
  envName: "${env.name}"
  scriptPath: "/home/litespeed/mb-backups"
  logPath: "/home/litespeed/mb-backups/logs"
```

**After:**
```yaml
globals:
  envName: "${env.name}"
  scriptPath: "/home/litespeed/mb-backups"
  logPath: "/home/litespeed/mb-backups/logs"
  backupRepoPath: "/data"
```

**Impact:** ✅ Centralized configuration

---

#### Change 3: Installation Sequence (Lines 25-29)
**Purpose:** Validate storage before installation

**Before:**
```yaml
onInstall:
  - checkAddons
  - installRestic
  - importScripts
```

**After:**
```yaml
onInstall:
  - checkAddons
  - validateStorageMount  # NEW: Validate /data exists and is writable
  - installRestic
  - importScripts
```

**Impact:** ✅ Fail early if storage not available

---

#### Change 4: New Storage Validation Action (Lines 187-210)
**Purpose:** Ensure /data is properly mounted

**Added:**
```yaml
validateStorageMount:
  - cmd[cp]:
      user: root
      commands:
        - |
          echo "[VALIDATION] Checking storage mount at /data..."
          if [ ! -d "/data" ]; then
            echo "[ERROR] /data directory does not exist!"
            echo "[ERROR] This addon requires /data to be mounted to shared storage."
            echo "[ERROR] Please ensure Shared Storage is mounted to /data before installing this addon."
            exit 1
          fi
          if [ ! -w "/data" ]; then
            echo "[WARNING] /data is not writable, attempting to fix permissions..."
            chmod 755 /data || exit 1
          fi
          touch /data/.mount_test 2>/dev/null || {
            echo "[ERROR] Cannot write to /data directory!"
            echo "[ERROR] Please check mount permissions for shared storage."
            exit 1
          }
          rm -f /data/.mount_test
          echo "[VALIDATION] Storage mount validated successfully"
          echo "[VALIDATION] /data is accessible and writable"
```

**Impact:** ✅ Prevents installation if storage unavailable

---

#### Change 5: Safe Uninstall (Lines 374-393)
**Purpose:** Preserve backup data and password on uninstall

**Before:**
```yaml
removeScripts:
  - cmd[cp]:
      user: root
      commands:
        # Remove the crontab entry for the add-on
        - (crontab -l | grep -v "${globals.scriptPath}/manage_backup_schedule.sh" | crontab -) || true
        # Stop any running backup processes
        - pkill -f "restic" || true
        - pkill -f "mb-backups" || true
        # Remove script directory
        - rm -rf "${globals.scriptPath}"
        # Remove backup repository completely
        - rm -rf /data/backups           # ⚠️ Wrong path
        # Remove password file
        - rm -f /etc/restic-password     # ⚠️ CRITICAL DATA LOSS
        # Remove log rotation config
        - rm -f /etc/logrotate.d/backup-addon
        # Remove any restic cache
        - rm -rf /home/*/cache/restic || true
        - rm -rf /root/.cache/restic || true
```

**After:**
```yaml
removeScripts:
  - cmd[cp]:
      user: root
      commands:
        # Remove the crontab entry for the add-on
        - (crontab -l | grep -v "${globals.scriptPath}/manage_backup_schedule.sh" | crontab -) || true
        # Stop any running backup processes
        - pkill -f "mb-backups" || true
        # Remove script directory
        - rm -rf "${globals.scriptPath}"
        # PRESERVE BACKUP DATA: DO NOT delete /data (repository stored on shared storage)
        # PRESERVE PASSWORD: DO NOT delete /etc/restic-password (needed to access backups after reinstall)
        # Note: Password is now stored in /data/.restic-password for persistence
        # Remove log rotation config only
        - rm -f /etc/logrotate.d/backup-addon
        # Remove restic cache only (safe to delete)
        - rm -rf /home/*/cache/restic || true
        - rm -rf /root/.cache/restic || true
        # Log the preservation
        - echo "[UNINSTALL] Backup repository and password preserved for future use" | tee -a /var/log/backup_addon.log
```

**Impact:** ✅ No data loss on uninstall

---

## 📊 Impact Summary

| File | Lines Changed | Lines Added | Lines Removed |
|------|--------------|-------------|---------------|
| `scripts/install-restic.sh` | ~40 | ~35 | ~5 |
| `manifest.jps` | ~50 | ~30 | ~3 |
| **Total** | **~90** | **~65** | **~8** |

## 🎯 Critical Changes

### 🔴 Removed (Dangerous)
1. ❌ `rm -rf /data/*` - Deleted all backups
2. ❌ `rm -f /etc/restic-password` - Lost access to backups
3. ❌ `rm -rf /data/backups` - Incorrect path
4. ❌ `pkill -f "restic"` - Could interrupt backups

### 🟢 Added (Protective)
1. ✅ Password storage in `/data/.restic-password`
2. ✅ Storage mount validation
3. ✅ Repository preservation on uninstall
4. ✅ Snapshot count reporting
5. ✅ Detailed logging and error messages

## 🔄 Data Flow Changes

### Old Flow (Broken):
```
Install → Generate Random Password → Store in /etc
          ↓
Uninstall → DELETE Password → DELETE Repository
          ↓
Reinstall → Generate NEW Password → Can't Access Old Backups ❌
```

### New Flow (Fixed):
```
Install → Generate/Restore Password → Store in /etc AND /data
          ↓
Uninstall → PRESERVE Password → PRESERVE Repository
          ↓
Reinstall → RESTORE Password from /data → Access All Backups ✅
```

## 🧪 Verification Points

After deploying these changes, verify:

1. ✅ Password exists in both locations: `/etc/restic-password` AND `/data/.restic-password`
2. ✅ Passwords are identical: `diff /etc/restic-password /data/.restic-password`
3. ✅ Repository accessible: `restic -r /data snapshots` works
4. ✅ Snapshots preserved after uninstall/reinstall
5. ✅ Can restore from old backups

## 📚 Documentation Files Created

1. **BACKUP_PERSISTENCE_FIX.md** - Complete technical documentation
2. **QUICK_VALIDATION_GUIDE.md** - Step-by-step testing guide  
3. **CHANGES_SUMMARY.md** - This file (detailed changes)

## 🚀 Next Steps

1. ✅ Review changes (completed)
2. ✅ Test in development environment
3. ⏳ Deploy to staging
4. ⏳ User acceptance testing
5. ⏳ Deploy to production
6. ⏳ Update user documentation

---

**Last Updated:** $(date)
**Version:** 2.0 (Persistence Fix)
**Status:** ✅ Ready for Testing