Linux Disaster Recovery Testing: Validation Guide for SysAdmins

# Create testing directory structure
mkdir -p /opt/dr-testing/{scripts,logs,reports,configs}
mkdir -p /opt/dr-testing/test-scenarios/{file-recovery,system-recovery,service-recovery}

# Set appropriate permissions for testing framework
chmod -R 755 /opt/dr-testing
chown -R root:sysadmin /opt/dr-testing

# Create testing configuration file
cat > /opt/dr-testing/configs/dr-test-config.conf << 'EOF'
# Disaster Recovery Testing Configuration
TEST_ENVIRONMENT="/opt/test-environment"
BACKUP_SOURCE="/var/backups"
LOG_DIRECTORY="/opt/dr-testing/logs"
REPORT_DIRECTORY="/opt/dr-testing/reports"
EMAIL_ALERTS="admin@company.com"
EOF

# System criticality assessment script
#!/bin/bash
# File: /opt/dr-testing/scripts/assess-criticality.sh

SYSTEMS_CONFIG="/opt/dr-testing/configs/systems.conf"
CRITICALITY_REPORT="/opt/dr-testing/reports/criticality-$(date +%Y%m%d).txt"

# Define system criticality levels
declare -A CRITICAL_SYSTEMS=(
    ["database"]="RTO=15min,RPO=5min"
    ["web-server"]="RTO=30min,RPO=15min"
    ["application"]="RTO=45min,RPO=30min"
)

echo "=== System Criticality Assessment ===" > "$CRITICALITY_REPORT"
echo "Date: $(date)" >> "$CRITICALITY_REPORT"

for system in "${!CRITICAL_SYSTEMS[@]}"; do
    echo "System: $system - ${CRITICAL_SYSTEMS[$system]}" >> "$CRITICALITY_REPORT"
done

# Test service availability
systemctl list-units --type=service --state=active | grep -E "(mysql|nginx|apache|postgresql)" >> "$CRITICALITY_REPORT"

# RTO/RPO monitoring script
#!/bin/bash
# File: /opt/dr-testing/scripts/rto-rpo-monitor.sh

SERVICE_NAME="$1"
START_TIME=$(date +%s)
LOG_FILE="/opt/dr-testing/logs/rto-rpo-$(date +%Y%m%d).log"

measure_rto() {
    local service="$1"
    local start_time="$2"
    
    echo "Starting RTO measurement for $service at $(date)" >> "$LOG_FILE"
    
    # Simulate service failure
    systemctl stop "$service"
    sleep 2
    
    # Begin recovery process
    recovery_start=$(date +%s)
    systemctl start "$service"
    
    # Wait for service to become active
    while ! systemctl is-active --quiet "$service"; do
        sleep 1
    done
    
    recovery_end=$(date +%s)
    rto_actual=$((recovery_end - recovery_start))
    
    echo "RTO for $service: ${rto_actual} seconds" >> "$LOG_FILE"
    echo "Service recovery completed at $(date)" >> "$LOG_FILE"
}

# Execute RTO measurement
if [ "$#" -eq 1 ]; then
    measure_rto "$SERVICE_NAME" "$START_TIME"
else
    echo "Usage: $0 <service-name>"
    exit 1
fi

# Performance measurement script
#!/bin/bash
# File: /opt/dr-testing/scripts/performance-monitor.sh

METRICS_FILE="/opt/dr-testing/logs/performance-metrics-$(date +%Y%m%d).csv"

# Initialize metrics file
echo "Timestamp,Operation,Duration,Status,Data_Size,Throughput" > "$METRICS_FILE"

measure_backup_performance() {
    local source_dir="$1"
    local backup_file="$2"
    local start_time=$(date +%s.%N)
    
    # Perform backup operation
    tar -czf "$backup_file" "$source_dir" 2>/dev/null
    local status=$?
    
    local end_time=$(date +%s.%N)
    local duration=$(echo "$end_time - $start_time" | bc)
    local data_size=$(du -b "$backup_file" 2>/dev/null | cut -f1)
    local throughput=$(echo "scale=2; $data_size / $duration" | bc)
    
    # Record metrics
    echo "$(date),Backup,$duration,$status,$data_size,$throughput" >> "$METRICS_FILE"
}

measure_restore_performance() {
    local backup_file="$1"
    local restore_dir="$2"
    local start_time=$(date +%s.%N)
    
    # Perform restore operation
    tar -xzf "$backup_file" -C "$restore_dir" 2>/dev/null
    local status=$?
    
    local end_time=$(date +%s.%N)
    local duration=$(echo "$end_time - $start_time" | bc)
    local data_size=$(du -b "$backup_file" 2>/dev/null | cut -f1)
    local throughput=$(echo "scale=2; $data_size / $duration" | bc)
    
    # Record metrics
    echo "$(date),Restore,$duration,$status,$data_size,$throughput" >> "$METRICS_FILE"
}

# Example usage
measure_backup_performance "/etc" "/tmp/test-backup.tar.gz"
measure_restore_performance "/tmp/test-backup.tar.gz" "/tmp/restore-test"

#!/bin/bash
# File: /opt/dr-testing/scripts/automated-dr-test.sh
# Comprehensive Disaster Recovery Testing Automation

# Configuration variables
CONFIG_FILE="/opt/dr-testing/configs/dr-test-config.conf"
TEST_LOG="/opt/dr-testing/logs/dr-test-$(date +%Y%m%d_%H%M%S).log"
REPORT_FILE="/opt/dr-testing/reports/dr-report-$(date +%Y%m%d).html"

# Source configuration
source "$CONFIG_FILE"

# Initialize logging
exec 1> >(tee -a "$TEST_LOG")
exec 2>&1

echo "=== Disaster Recovery Test Started ===" 
echo "Date: $(date)"
echo "Test ID: DR-$(date +%Y%m%d-%H%M%S)"

# Test 1: Backup Integrity Verification
test_backup_integrity() {
    echo "--- Testing Backup Integrity ---"
    local backup_dir="$BACKUP_SOURCE"
    local test_passed=0
    local test_failed=0
    
    for backup_file in "$backup_dir"/*.tar.gz; do
        if [ -f "$backup_file" ]; then
            echo "Testing: $(basename "$backup_file")"
            
            # Test archive integrity
            if tar -tzf "$backup_file" >/dev/null 2>&1; then
                echo "✓ Archive integrity verified"
                ((test_passed++))
            else
                echo "✗ Archive integrity failed"
                ((test_failed++))
            fi
            
            # Test file count
            file_count=$(tar -tzf "$backup_file" | wc -l)
            echo "Files in archive: $file_count"
        fi
    done
    
    echo "Backup integrity tests: $test_passed passed, $test_failed failed"
}

# Test 2: Service Recovery Validation
test_service_recovery() {
    echo "--- Testing Service Recovery ---"
    local services=("nginx" "mysql" "ssh")
    
    for service in "${services[@]}"; do
        if systemctl is-enabled --quiet "$service" 2>/dev/null; then
            echo "Testing service: $service"
            
            # Record initial state
            initial_state=$(systemctl is-active "$service")
            
            # Stop service
            systemctl stop "$service"
            sleep 2
            
            # Start recovery timer
            recovery_start=$(date +%s)
            systemctl start "$service"
            
            # Wait for service activation
            while ! systemctl is-active --quiet "$service"; do
                sleep 1
            done
            
            recovery_end=$(date +%s)
            recovery_time=$((recovery_end - recovery_start))
            
            echo "✓ Service $service recovered in ${recovery_time}s"
        fi
    done
}

# Test 3: Database Recovery Testing
test_database_recovery() {
    echo "--- Testing Database Recovery ---"
    
    if command -v mysql >/dev/null 2>&1; then
        # Create test database and data
        mysql -u root -e "CREATE DATABASE IF NOT EXISTS dr_test;"
        mysql -u root -e "CREATE TABLE dr_test.test_data (id INT PRIMARY KEY, data VARCHAR(255));"
        mysql -u root -e "INSERT INTO dr_test.test_data VALUES (1, 'test_data_$(date)');"
        
        # Create backup
        mysqldump dr_test > "/tmp/dr_test_backup.sql"
        
        # Simulate data loss
        mysql -u root -e "DROP DATABASE dr_test;"
        
        # Restore from backup
        mysql -u root -e "CREATE DATABASE dr_test;"
        mysql -u root dr_test < "/tmp/dr_test_backup.sql"
        
        # Verify restoration
        data_count=$(mysql -u root -se "SELECT COUNT(*) FROM dr_test.test_data;")
        if [ "$data_count" -gt 0 ]; then
            echo "✓ Database recovery successful"
        else
            echo "✗ Database recovery failed"
        fi
        
        # Cleanup
        mysql -u root -e "DROP DATABASE dr_test;"
        rm -f "/tmp/dr_test_backup.sql"
    fi
}

# Execute all tests
test_backup_integrity
test_service_recovery
test_database_recovery

echo "=== Disaster Recovery Test Completed ==="
echo "Full test log available at: $TEST_LOG"

# Cron configuration for automated DR testing
# File: /etc/cron.d/disaster-recovery-testing

# Daily backup validation at 2 AM
0 2 * * * root /opt/dr-testing/scripts/backup-validation.sh

# Weekly full DR test on Sundays at 3 AM
0 3 * * 0 root /opt/dr-testing/scripts/automated-dr-test.sh

# Monthly comprehensive DR drill on first Sunday at 4 AM
0 4 1-7 * 0 root /opt/dr-testing/scripts/comprehensive-dr-drill.sh

#!/bin/bash
# File: /opt/dr-testing/scripts/component-testing.sh

# File system testing
test_filesystem_recovery() {
    echo "=== File System Recovery Test ==="
    local test_mount="/mnt/dr-test"
    local test_file="$test_mount/test-data.txt"
    
    # Create test mount point
    mkdir -p "$test_mount"
    
    # Create test filesystem
    dd if=/dev/zero of="/tmp/test-fs.img" bs=1M count=100
    mkfs.ext4 "/tmp/test-fs.img"
    mount "/tmp/test-fs.img" "$test_mount"
    
    # Create test data
    echo "Test data created at $(date)" > "$test_file"
    sync
    
    # Simulate filesystem unmount
    umount "$test_mount"
    
    # Test recovery mount
    mount "/tmp/test-fs.img" "$test_mount"
    
    # Verify data integrity
    if [ -f "$test_file" ] && grep -q "Test data" "$test_file"; then
        echo "✓ File system recovery successful"
    else
        echo "✗ File system recovery failed"
    fi
    
    # Cleanup
    umount "$test_mount"
    rm -f "/tmp/test-fs.img"
    rmdir "$test_mount"
}

# Network configuration testing
test_network_recovery() {
    echo "=== Network Configuration Recovery Test ==="
    local interface="eth0"
    
    # Backup current configuration
    ip addr show "$interface" > "/tmp/network-backup.txt"
    
    # Test network service restart
    systemctl restart networking
    
    # Verify network connectivity
    if ping -c 1 8.8.8.8 >/dev/null 2>&1; then
        echo "✓ Network recovery successful"
    else
        echo "✗ Network recovery failed"
    fi
}

# Application configuration testing
test_application_recovery() {
    echo "=== Application Configuration Recovery Test ==="
    local app_config="/etc/nginx/nginx.conf"
    
    if [ -f "$app_config" ]; then
        # Backup original configuration
        cp "$app_config" "${app_config}.backup"
        
        # Test configuration validation
        nginx -t 2>/dev/null
        if [ $? -eq 0 ]; then
            echo "✓ Application configuration valid"
        else
            echo "✗ Application configuration invalid"
        fi
        
        # Restore original configuration
        mv "${app_config}.backup" "$app_config"
    fi
}

# Execute component tests
test_filesystem_recovery
test_network_recovery
test_application_recovery

#!/bin/bash
# File: /opt/dr-testing/scripts/end-to-end-test.sh

# Complete system recovery simulation
simulate_complete_recovery() {
    echo "=== End-to-End Recovery Simulation ==="
    local recovery_log="/opt/dr-testing/logs/e2e-recovery-$(date +%Y%m%d).log"
    
    exec 1> >(tee -a "$recovery_log")
    exec 2>&1
    
    echo "Starting complete system recovery simulation at $(date)"
    
    # Phase 1: Initial assessment
    echo "Phase 1: System Assessment"
    systemctl status --no-pager | head -20
    df -h
    free -h
    
    # Phase 2: Critical services identification
    echo "Phase 2: Critical Services Identification"
    critical_services=($(systemctl list-units --type=service --state=active | grep -E "(mysql|nginx|apache|ssh|network)" | awk '{print $1}'))
    echo "Critical services detected: ${critical_services[*]}"
    
    # Phase 3: Service restoration
    echo "Phase 3: Service Restoration"
    for service in "${critical_services[@]}"; do
        echo "Restarting service: $service"
        start_time=$(date +%s)
        
        systemctl restart "$service"
        
        # Wait for service to become active
        while ! systemctl is-active --quiet "$service"; do
            sleep 1
        done
        
        end_time=$(date +%s)
        recovery_time=$((end_time - start_time))
        echo "Service $service restored in ${recovery_time}s"
    done
    
    # Phase 4: Verification
    echo "Phase 4: System Verification"
    failed_services=()
    for service in "${critical_services[@]}"; do
        if ! systemctl is-active --quiet "$service"; then
            failed_services+=("$service")
        fi
    done
    
    if [ ${#failed_services[@]} -eq 0 ]; then
        echo "✓ All critical services restored successfully"
    else
        echo "✗ Failed services: ${failed_services[*]}"
    fi
    
    echo "End-to-end recovery simulation completed at $(date)"
}

simulate_complete_recovery

#!/bin/bash
# File: /opt/dr-testing/scripts/backup-verification.sh

BACKUP_DIR="/var/backups"
VERIFICATION_LOG="/opt/dr-testing/logs/backup-verification-$(date +%Y%m%d).log"
TEMP_RESTORE_DIR="/tmp/backup-verification"

# Initialize logging
exec 1> >(tee -a "$VERIFICATION_LOG")
exec 2>&1

echo "=== Backup Integrity Verification Started ==="
echo "Date: $(date)"

# Create temporary restoration directory
mkdir -p "$TEMP_RESTORE_DIR"

verify_tar_archive() {
    local archive_file="$1"
    local verification_passed=true
    
    echo "Verifying archive: $(basename "$archive_file")"
    
    # Test 1: Archive integrity
    if tar -tzf "$archive_file" >/dev/null 2>&1; then
        echo "✓ Archive structure integrity verified"
    else
        echo "✗ Archive structure integrity failed"
        verification_passed=false
    fi
    
    # Test 2: File count verification
    local file_count=$(tar -tzf "$archive_file" | wc -l)
    echo "Files in archive: $file_count"
    
    if [ "$file_count" -eq 0 ]; then
        echo "✗ Empty archive detected"
        verification_passed=false
    fi
    
    # Test 3: Sample file restoration
    local test_dir="$TEMP_RESTORE_DIR/$(basename "$archive_file" .tar.gz)"
    mkdir -p "$test_dir"
    
    # Extract first 10 files for testing
    tar -xzf "$archive_file" -C "$test_dir" 2>/dev/null | head -10
    
    if [ -d "$test_dir" ] && [ "$(find "$test_dir" -type f | wc -l)" -gt 0 ]; then
        echo "✓ Sample file restoration successful"
    else
        echo "✗ Sample file restoration failed"
        verification_passed=false
    fi
    
    # Cleanup test directory
    rm -rf "$test_dir"
    
    if $verification_passed; then
        echo "✓ Overall verification: PASSED"
    else
        echo "✗ Overall verification: FAILED"
    fi
    
    echo "---"
}

verify_database_backup() {
    local sql_file="$1"
    
    if [ ! -f "$sql_file" ]; then
        echo "Database backup file not found: $sql_file"
        return 1
    fi
    
    echo "Verifying database backup: $(basename "$sql_file")"
    
    # Test SQL syntax
    if mysql --help >/dev/null 2>&1; then
        # Create temporary test database
        local test_db="backup_verification_$(date +%s)"
        mysql -u root -e "CREATE DATABASE $test_db;" 2>/dev/null
        
        # Test SQL file import
        if mysql -u root "$test_db" < "$sql_file" 2>/dev/null; then
            echo "✓ Database backup restoration successful"
            
            # Get table count
            table_count=$(mysql -u root "$test_db" -e "SHOW TABLES;" | wc -l)
            echo "Tables restored: $((table_count - 1))"
        else
            echo "✗ Database backup restoration failed"
        fi
        
        # Cleanup test database
        mysql -u root -e "DROP DATABASE IF EXISTS $test_db;" 2>/dev/null
    fi
}

# Main verification process
echo "Scanning backup directory: $BACKUP_DIR"

# Verify tar archives
for backup_file in "$BACKUP_DIR"/*.tar.gz; do
    if [ -f "$backup_file" ]; then
        verify_tar_archive "$backup_file"
    fi
done

# Verify database backups
for sql_file in "$BACKUP_DIR"/*.sql; do
    if [ -f "$sql_file" ]; then
        verify_database_backup "$sql_file"
    fi
done

# Cleanup
rm -rf "$TEMP_RESTORE_DIR"

echo "=== Backup Integrity Verification Completed ==="

#!/bin/bash
# File: /opt/dr-testing/scripts/checksum-validation.sh

BACKUP_DIR="/var/backups"
CHECKSUM_FILE="/var/backups/checksums.sha256"
VALIDATION_REPORT="/opt/dr-testing/reports/checksum-validation-$(date +%Y%m%d).txt"

# Generate checksums for all backup files
generate_checksums() {
    echo "Generating checksums for backup files..."
    cd "$BACKUP_DIR"
    find . -name "*.tar.gz" -o -name "*.sql" | xargs sha256sum > "$CHECKSUM_FILE"
    echo "Checksums generated: $(wc -l < "$CHECKSUM_FILE") files"
}

# Validate existing checksums
validate_checksums() {
    echo "=== Checksum Validation Report ===" > "$VALIDATION_REPORT"
    echo "Date: $(date)" >> "$VALIDATION_REPORT"
    echo "" >> "$VALIDATION_REPORT"
    
    if [ ! -f "$CHECKSUM_FILE" ]; then
        echo "Checksum file not found. Generating new checksums..."
        generate_checksums
        return
    fi
    
    cd "$BACKUP_DIR"
    
    # Validate checksums
    while IFS=' ' read -r expected_sum filename; do
        if [ -f "$filename" ]; then
            actual_sum=$(sha256sum "$filename" | cut -d' ' -f1)
            
            if [ "$expected_sum" = "$actual_sum" ]; then
                echo "✓ $filename" >> "$VALIDATION_REPORT"
            else
                echo "✗ $filename - CHECKSUM MISMATCH" >> "$VALIDATION_REPORT"
            fi
        else
            echo "✗ $filename - FILE MISSING" >> "$VALIDATION_REPORT"
        fi
    done < "$CHECKSUM_FILE"
    
    echo "" >> "$VALIDATION_REPORT"
    echo "Validation completed at $(date)" >> "$VALIDATION_REPORT"
}

# Execute validation
validate_checksums
echo "Checksum validation report: $VALIDATION_REPORT"

#!/bin/bash
# File: /opt/dr-testing/scripts/metrics-collection.sh

METRICS_DIR="/opt/dr-testing/metrics"
METRICS_FILE="$METRICS_DIR/dr-metrics-$(date +%Y%m%d_%H%M%S).json"

# Create metrics directory
mkdir -p "$METRICS_DIR"

# System resource monitoring
collect_system_metrics() {
    local test_start_time="$1"
    local test_name="$2"
    
    echo "{"
    echo "  \"test_name\": \"$test_name\","
    echo "  \"timestamp\": \"$(date -Iseconds)\","
    echo "  \"test_duration\": $(($(date +%s) - test_start_time)),"
    
    # CPU metrics
    cpu_usage=$(top -bn1 | grep "Cpu(s)" | awk '{print $2}' | cut -d'%' -f1)
    echo "  \"cpu_usage_percent\": $cpu_usage,"
    
    # Memory metrics
    memory_info=$(free -b | grep "Mem:")
    total_memory=$(echo $memory_info | awk '{print $2}')
    used_memory=$(echo $memory_info | awk '{print $3}')
    memory_usage_percent=$(echo "scale=2; $used_memory * 100 / $total_memory" | bc)
    
    echo "  \"memory_total_bytes\": $total_memory,"
    echo "  \"memory_used_bytes\": $used_memory,"
    echo "  \"memory_usage_percent\": $memory_usage_percent,"
    
    # Disk I/O metrics
    disk_stats=$(iostat -d 1 1 | tail -n +4 | head -1)
    if [ -n "$disk_stats" ]; then
        read_rate=$(echo $disk_stats | awk '{print $3}')
        write_rate=$(echo $disk_stats | awk '{print $4}')
        echo "  \"disk_read_rate_kb_s\": $read_rate,"
        echo "  \"disk_write_rate_kb_s\": $write_rate,"
    fi
    
    # Network metrics
    network_stats=$(cat /proc/net/dev | grep "eth0:")
    if [ -n "$network_stats" ]; then
        rx_bytes=$(echo $network_stats | awk '{print $2}')
        tx_bytes=$(echo $network_stats | awk '{print $10}')
        echo "  \"network_rx_bytes\": $rx_bytes,"
        echo "  \"network_tx_bytes\": $tx_bytes,"
    fi
    
    # Load average
    load_avg=$(uptime | awk -F'load average:' '{print $2}' | awk '{print $1}' | tr -d ',')
    echo "  \"load_average_1min\": $load_avg"
    
    echo "}"
}

# Recovery time measurement
measure_recovery_time() {
    local operation="$1"
    local start_time="$2"
    local end_time="$3"
    
    local duration=$((end_time - start_time))
    
    echo "{"
    echo "  \"operation\": \"$operation\","
    echo "  \"start_time\": $start_time,"
    echo "  \"end_time\": $end_time,"
    echo "  \"duration_seconds\": $duration,"
    echo "  \"timestamp\": \"$(date -Iseconds)\""
    echo "}"
}

# Service availability monitoring
monitor_service_availability() {
    local services=("nginx" "mysql" "ssh" "network")
    
    echo "{"
    echo "  \"timestamp\": \"$(date -Iseconds)\","
    echo "  \"service_status\": {"
    
    for ((i=0; i<${#services[@]}; i++)); do
        service="${services[i]}"
        if systemctl is-active --quiet "$service" 2>/dev/null; then
            status="active"
        else
            status="inactive"
        fi
        
        echo -n "    \"$service\": \"$status\""
        if [ $((i+1)) -lt ${#services[@]} ]; then
            echo ","
        else
            echo ""
        fi
    done
    
    echo "  }"
    echo "}"
}

# Example usage
test_start_time=$(date +%s)
collect_system_metrics "$test_start_time" "backup_validation" > "$METRICS_FILE"

#!/bin/bash
# File: /opt/dr-testing/scripts/realtime-monitor.sh

MONITOR_LOG="/opt/dr-testing/logs/realtime-monitor.log"
UPDATE_INTERVAL=5

# Initialize monitoring
echo "=== Real-time DR Testing Monitor ===" | tee "$MONITOR_LOG"
echo "Started: $(date)" | tee -a "$MONITOR_LOG"

monitor_loop() {
    while true; do
        clear
        echo "=== Linux Disaster Recovery Testing Monitor ==="
        echo "Last Update: $(date)"
        echo "Update Interval: ${UPDATE_INTERVAL}s"
        echo "=============================================="
        
        # System load
        echo "SYSTEM LOAD:"
        uptime
        echo ""
        
        # Memory usage
        echo "MEMORY USAGE:"
        free -h
        echo ""
        
        # Disk usage
        echo "DISK USAGE:"
        df -h | head -5
        echo ""
        
        # Active services
        echo "CRITICAL SERVICES STATUS:"
        for service in nginx mysql ssh; do
            if systemctl is-enabled --quiet "$service" 2>/dev/null; then
                status=$(systemctl is-active "$service")
                echo "$service: $status"
            fi
        done
        echo ""
        
        # Network connectivity
        echo "NETWORK CONNECTIVITY:"
        if ping -c 1 8.8.8.8 >/dev/null 2>&1; then
            echo "Internet: Connected"
        else
            echo "Internet: Disconnected"
        fi
        echo ""
        
        # Recent log entries
        echo "RECENT DR TEST LOG ENTRIES:"
        tail -5 /opt/dr-testing/logs/*.log 2>/dev/null | tail -5
        echo ""
        
        echo "Press Ctrl+C to exit monitoring"
        
        # Log current status
        echo "$(date): Load=$(uptime | awk -F'load average:' '{print $2}' | awk '{print $1}' | tr -d ','), Memory=$(free | grep Mem | awk '{printf "%.1f%%", $3/$2 * 100.0}')" >> "$MONITOR_LOG"
        
        sleep "$UPDATE_INTERVAL"
    done
}

# Start monitoring
trap 'echo "Monitoring stopped at $(date)" >> "$MONITOR_LOG"; exit' INT TERM
monitor_loop

#!/bin/bash
# File: /opt/dr-testing/scripts/generate-documentation.sh

DOC_DIR="/opt/dr-testing/documentation"
TEMPLATE_DIR="$DOC_DIR/templates"
OUTPUT_DIR="$DOC_DIR/generated"

# Create documentation structure
mkdir -p "$DOC_DIR"/{templates,generated,assets}

# Generate testing procedure document
generate_procedure_doc() {
    local test_name="$1"
    local output_file="$OUTPUT_DIR/${test_name}-procedure.md"
    
    cat > "$output_file" << 'EOF'
# Linux Disaster Recovery Testing Procedure

## Test Information
- **Test Name**: %TEST_NAME%
- **Test Type**: %TEST_TYPE%
- **Estimated Duration**: %DURATION%
- **Prerequisites**: %PREREQUISITES%

## Objective
Validate disaster recovery capabilities for %TEST_TARGET%

## Pre-Test Checklist
- [ ] Backup verification completed
- [ ] Test environment prepared
- [ ] Monitoring systems active
- [ ] Notification systems configured
- [ ] Recovery scripts validated

## Test Execution Steps

### Phase 1: Preparation
1. Verify current system status
```bash
   systemctl status
   df -h
   free -h
```

2. Document baseline metrics
```bash
   /opt/dr-testing/scripts/collect-baseline.sh
```

### Phase 2: Test Execution
1. Execute primary test scenario
```bash
   /opt/dr-testing/scripts/test-scenario.sh
```

2. Monitor recovery progress
```bash
   /opt/dr-testing/scripts/monitor-recovery.sh
```

### Phase 3: Validation
1. Verify service restoration
```bash
   /opt/dr-testing/scripts/validate-services.sh
```

2. Check data integrity
```bash
   /opt/dr-testing/scripts/verify-data.sh
```

## Success Criteria
- RTO achieved within target parameters
- RPO maintained within acceptable limits
- All critical services restored
- Data integrity verified
- System performance within normal ranges

## Post-Test Activities
- [ ] Test results documented
- [ ] Metrics collected and analyzed
- [ ] Issues logged and prioritized
- [ ] Recommendations documented
- [ ] Cleanup procedures executed

## Troubleshooting Guide

### Common Issues
1. **Service startup failures**
   - Check service dependencies
   - Verify configuration files
   - Review system logs

2. **Network connectivity issues**
   - Validate network configuration
   - Test DNS resolution
   - Check firewall rules

3. **Database recovery problems**
   - Verify backup integrity
   - Check disk space
   - Validate user permissions

## Contact Information
- **Primary Contact**: %PRIMARY_CONTACT%
- **Escalation Contact**: %ESCALATION_CONTACT%
- **Emergency Contact**: %EMERGENCY_CONTACT%
EOF

    # Replace placeholders with actual values
    sed -i "s/%TEST_NAME%/$test_name/g" "$output_file"
    echo "Generated procedure documentation: $output_file"
}

# Generate test report template
generate_report_template() {
    local report_file="$TEMPLATE_DIR/test-report-template.md"
    
    cat > "$report_file" << 'EOF'
# Disaster Recovery Test Report

## Executive Summary
**Test Date**: %TEST_DATE%
**Test Duration**: %TEST_DURATION%
**Overall Result**: %OVERALL_RESULT%

## Test Details
- **Test ID**: %TEST_ID%
- **Test Type**: %TEST_TYPE%
- **Systems Tested**: %SYSTEMS_TESTED%
- **Test Environment**: %TEST_ENVIRONMENT%

## Results Summary
| Metric | Target | Actual | Status |
|--------|--------|--------|--------|
| RTO | %RTO_TARGET% | %RTO_ACTUAL% | %RTO_STATUS% |
| RPO | %RPO_TARGET% | %RPO_ACTUAL% | %RPO_STATUS% |
| Data Integrity | 100% | %INTEGRITY_ACTUAL% | %INTEGRITY_STATUS% |

## Test Execution
### Successful Tests
- %SUCCESSFUL_TESTS%

### Failed Tests
- %FAILED_TESTS%

### Performance Metrics
- **Average CPU Usage**: %CPU_USAGE%
- **Peak Memory Usage**: %MEMORY_USAGE%
- **Disk I/O Performance**: %DISK_IO%
- **Network Throughput**: %NETWORK_THROUGHPUT%

## Issues Identified
1. %ISSUE_1%
2. %ISSUE_2%
3. %ISSUE_3%

## Recommendations
1. %RECOMMENDATION_1%
2. %RECOMMENDATION_2%
3. %RECOMMENDATION_3%

## Next Steps
- %NEXT_STEP_1%
- %NEXT_STEP_2%
- %NEXT_STEP_3%

## Appendices
- Test logs: %LOG_LOCATION%
- Performance data: %METRICS_LOCATION%
- Screenshots: %SCREENSHOTS_LOCATION%
EOF

    echo "Generated report template: $report_file"
}

# Generate documentation
generate_procedure_doc "backup_validation"
generate_report_template

echo "Documentation generation completed in: $DOC_DIR"

# Check service status and logs
systemctl status service-name --no-pager -l
journalctl -u service-name --since "1 hour ago"

# Verify service dependencies
systemctl list-dependencies service-name
systemd-analyze critical-chain service-name

# Test service configuration
service-name -t  # For nginx, apache
mysqld --validate-config  # For MySQL

# Check resource availability
df -h
free -h
ss -tlnp | grep :port-number

# Test archive integrity
tar -tzf backup-file.tar.gz >/dev/null
gzip -t backup-file.tar.gz

# Check file permissions and ownership
ls -la backup-directory/
namei -om /path/to/backup/file

# Verify available disk space
df -h restoration-destination/
du -sh backup-file.tar.gz

# Test restoration to temporary location
tar -xzf backup-file.tar.gz -C /tmp/test-restore/

# Monitor system performance
top -b -n 1
iotop -a -o -d 1
vmstat 1 5
netstat -i

# Check for resource bottlenecks
lsof | wc -l  # Open files count
ps aux --sort=-%cpu | head -10  # Top CPU processes
ps aux --sort=-%mem | head -10  # Top memory processes

# Analyze disk I/O patterns
iostat -x 1 5
sar -d 1 5