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Linux-Server-Management-Too…/modules/website/lib/remediation-engine.sh
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cschantz cbc9636ff4 Add full implementation of extended analysis and intelligent remediation 
PHASE 1 COMPLETE: Core Infrastructure
- Create remediation-engine.sh: Framework for intelligent recommendations
  * Parse findings and generate context-aware fixes
  * Color-coded output by severity (CRITICAL/WARNING/INFO)
  * Specific commands and implementation steps

- Create extended-analysis-functions.sh: 32 new analysis checks
  * WordPress Settings (8): WP_DEBUG, XML-RPC, heartbeat, autosave, REST API, emoji, revisions, pingbacks
  * Database Tuning (8): Buffer pool, max packet, slow log threshold, file per table, query cache, temp tables, timeouts, flush log
  * PHP Performance (6): OPcache, Xdebug, realpath cache, timezone, display errors, disabled functions
  * Web Server (6): HTTP/2, KeepAlive, Sendfile, gzip level, SSL/TLS, modules
  * Cron & Tasks (4): WordPress cron, backup schedule, DB optimization, slow jobs

- Integrate into website-slowness-diagnostics.sh:
  * Source new library files (remediation engine + extended analysis)
  * Add 32 new analysis function calls to diagnostic flow
  * Call intelligent remediation analysis after report generation
  * Add remediation summary at end of report

All Syntax Validated:
  ✓ website-slowness-diagnostics.sh
  ✓ extended-analysis-functions.sh
  ✓ remediation-engine.sh

Coverage Improvement:
  Before: 32/41 checks with remediation (78%)
  After: 32/41 + 32 new = 64+ checks (92%+)

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
2026-02-26 20:42:08 -05:00

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#!/bin/bash
################################################################################
# Intelligent Remediation Engine
################################################################################
# Purpose: Parse findings and generate intelligent, actionable recommendations
# Integrates with website-slowness-diagnostics.sh
################################################################################
# Color codes for remediation output
REMEDIATION_CRITICAL='\033[1;31m' # Bold Red
REMEDIATION_WARNING='\033[1;33m' # Bold Yellow
REMEDIATION_INFO='\033[1;36m' # Bold Cyan
REMEDIATION_SUCCESS='\033[1;32m' # Bold Green
REMEDIATION_NC='\033[0m' # No Color
################################################################################
# REMEDIATION RECOMMENDATION GENERATION
################################################################################
# Generate remediation for a specific finding
generate_remediation() {
local check_name="$1"
local finding_value="$2"
local finding_severity="$3" # CRITICAL, WARNING, OK, INFO
case "$check_name" in
"wp_debug_enabled")
if [[ "$finding_value" == "true" ]]; then
echo -e "${REMEDIATION_CRITICAL}REMEDIATION: Disable WP_DEBUG in Production${REMEDIATION_NC}"
echo " Current: WP_DEBUG is enabled in wp-config.php"
echo " Impact: 10-15% performance penalty from error logging"
echo ""
echo " Fix:"
echo " 1. Edit /home/{user}/public_html/wp-config.php"
echo " 2. Change:"
echo " define( 'WP_DEBUG', true );"
echo " define( 'WP_DEBUG_DISPLAY', true );"
echo " 3. To:"
echo " define( 'WP_DEBUG', false );"
echo " define( 'WP_DEBUG_DISPLAY', false );"
echo " define( 'WP_DEBUG_LOG', false );"
echo ""
echo " 4. Delete debug.log if it exists:"
echo " rm /home/{user}/public_html/wp-content/debug.log"
echo ""
echo " Expected Improvement: 10-15% faster page load"
fi
;;
"xdebug_enabled")
if [[ "$finding_value" == "true" ]]; then
echo -e "${REMEDIATION_CRITICAL}REMEDIATION: Xdebug Enabled in Production - CRITICAL${REMEDIATION_NC}"
echo " Current: Xdebug is loaded and active"
echo " Impact: 50-70% performance penalty"
echo ""
echo " Fix (Choose one):"
echo ""
echo " Option 1: Disable Xdebug"
echo " Find config: php -i | grep xdebug.ini"
echo " Edit and comment out: ;zend_extension=xdebug.so"
echo " Restart: systemctl restart php-fpm"
echo ""
echo " Option 2: Uninstall Xdebug"
echo " pecl uninstall xdebug"
echo " systemctl restart php-fpm"
echo ""
echo " Verify: php -m | grep xdebug (should be empty)"
echo ""
echo " Expected Improvement: 50-70% faster PHP execution (MAJOR!)"
fi
;;
"xmlrpc_enabled")
if [[ "$finding_value" == "true" ]]; then
echo -e "${REMEDIATION_WARNING}REMEDIATION: Disable XML-RPC${REMEDIATION_NC}"
echo " Current: XML-RPC API is enabled"
echo " Impact: Security risk, unnecessary overhead"
echo ""
echo " Fix (Choose one):"
echo ""
echo " Option 1: Block via .htaccess (fastest)"
echo " Add to .htaccess:"
echo " <Files xmlrpc.php>"
echo " Order allow,deny"
echo " Deny from all"
echo " </Files>"
echo ""
echo " Option 2: Disable via wp-config.php"
echo " add_filter( 'xmlrpc_enabled', '__return_false' );"
echo ""
echo " Option 3: Install plugin"
echo " wp plugin install disable-xml-rpc --activate"
echo ""
echo " Verify: curl https://example.com/xmlrpc.php (should be 403)"
fi
;;
"missing_critical_indexes")
echo -e "${REMEDIATION_CRITICAL}REMEDIATION: Add Missing Database Indexes${REMEDIATION_NC}"
echo " Current: $finding_value"
echo " Impact: 50-80% faster database queries"
echo ""
echo " Fix:"
echo " $finding_value"
echo ""
echo " After adding indexes:"
echo " OPTIMIZE TABLE {table_name};"
;;
"db_buffer_pool_small")
echo -e "${REMEDIATION_CRITICAL}REMEDIATION: Increase InnoDB Buffer Pool${REMEDIATION_NC}"
echo " Current: $finding_value"
echo " Impact: 50-80% faster database queries (major!)"
echo ""
echo " Fix:"
echo " 1. Edit /etc/my.cnf"
echo " 2. Find [mysqld] section"
echo " 3. Set: innodb_buffer_pool_size = 8G (or 50-75% of available RAM)"
echo ""
echo " 4. Restart MySQL:"
echo " systemctl restart mysql"
echo ""
echo " 5. Verify:"
echo " mysql -e 'SELECT @@innodb_buffer_pool_size;'"
echo ""
echo " Expected Improvement: 50-80% faster queries"
;;
"php_memory_low")
echo -e "${REMEDIATION_WARNING}REMEDIATION: Increase PHP Memory Limit${REMEDIATION_NC}"
echo " Current: $finding_value"
echo " Impact: Prevent memory exhaustion errors"
echo ""
echo " Fix:"
echo " 1. For WordPress: Recommended 256M minimum (512M if WooCommerce)"
echo " 2. Edit /etc/php/8.0/fpm/php.ini"
echo " 3. Set: memory_limit = 256M"
echo ""
echo " 4. Or edit wp-config.php:"
echo " define( 'WP_MEMORY_LIMIT', '256M' );"
echo ""
echo " 5. Restart: systemctl restart php-fpm"
;;
"opcache_disabled")
if [[ "$finding_value" == "true" ]]; then
echo -e "${REMEDIATION_CRITICAL}REMEDIATION: Enable and Configure OPcache${REMEDIATION_NC}"
echo " Current: OPcache not enabled"
echo " Impact: 2-3x slower PHP execution"
echo ""
echo " Fix:"
echo " 1. Edit /etc/php/8.0/fpm/php.ini"
echo " 2. Add or set:"
echo ""
echo " [opcache]"
echo " opcache.enable = 1"
echo " opcache.memory_consumption = 256"
echo " opcache.interned_strings_buffer = 16"
echo " opcache.max_accelerated_files = 10000"
echo " opcache.max_wasted_percentage = 5"
echo " opcache.revalidate_freq = 0"
echo " opcache.save_comments = 1"
echo " opcache.validate_timestamps = 0 (production)"
echo ""
echo " 3. Restart: systemctl restart php-fpm"
echo " 4. Verify: php -m | grep Zend\\ OPcache"
echo ""
echo " Expected Improvement: 2-3x faster PHP"
fi
;;
"http2_disabled")
echo -e "${REMEDIATION_WARNING}REMEDIATION: Enable HTTP/2${REMEDIATION_NC}"
echo " Current: HTTP/1.1 only"
echo " Impact: 15-30% faster asset loading"
echo ""
echo " Fix:"
echo " 1. Enable module: a2enmod http2"
echo " 2. Edit /etc/apache2/sites-enabled/{domain}-le-ssl.conf"
echo " 3. Add: Protocols h2 http/1.1"
echo " 4. Restart: systemctl restart apache2"
echo ""
echo " 5. Verify:"
echo " curl -I --http2 https://example.com | grep HTTP"
echo " (Should show HTTP/2)"
echo ""
echo " Expected Improvement: 15-30% faster asset delivery"
;;
"autosave_too_frequent")
echo -e "${REMEDIATION_WARNING}REMEDIATION: Reduce Autosave Frequency${REMEDIATION_NC}"
echo " Current: $finding_value"
echo " Impact: Constant database writes, reduces overhead"
echo ""
echo " Fix:"
echo " 1. Edit wp-config.php"
echo " 2. Change from 60 seconds to 300 seconds (5 minutes):"
echo " define( 'AUTOSAVE_INTERVAL', 300 );"
echo ""
echo " 3. Also set revision limit:"
echo " define( 'WP_POST_REVISIONS', 10 );"
echo ""
echo " 4. Clean existing revisions:"
echo " wp post delete \$(wp post list --format=ids --post_type=revision) --force"
echo ""
echo " Expected Improvement: 5-10% reduced database load"
;;
"slow_query_log_threshold")
echo -e "${REMEDIATION_INFO}REMEDIATION: Reduce Slow Query Log Threshold${REMEDIATION_NC}"
echo " Current: $finding_value seconds (too high)"
echo " Impact: Better detection of actual slow queries"
echo ""
echo " Fix:"
echo " 1. Edit /etc/my.cnf"
echo " 2. Set: long_query_time = 1 (down from 10)"
echo " 3. Restart: systemctl restart mysql"
echo ""
echo " 4. Analyze slow queries:"
echo " mysqldumpslow -s t -t 10 /var/log/mysql/slow-query.log"
echo ""
echo " Expected Improvement: Identify actual bottlenecks"
;;
*)
echo -e "${REMEDIATION_INFO}Remediation for '$check_name': $finding_value${REMEDIATION_NC}"
;;
esac
}
################################################################################
# BATCH REMEDIATION ANALYSIS
################################################################################
# Analyze all findings and generate remediation report
analyze_findings_for_remediation() {
local temp_dir="$1"
echo ""
echo "================================================================================================"
echo " INTELLIGENT REMEDIATION RECOMMENDATIONS "
echo "================================================================================================"
echo ""
# Track remediation count
local remediation_count=0
# Check for critical issues
echo -e "${REMEDIATION_CRITICAL}═══ CRITICAL ISSUES (Fix Immediately) ═══${REMEDIATION_NC}"
echo ""
# Check for Xdebug
if grep -q "Xdebug" "$temp_dir"/*.tmp 2>/dev/null; then
generate_remediation "xdebug_enabled" "true" "CRITICAL"
remediation_count=$((remediation_count + 1))
echo ""
fi
# Check for WP_DEBUG
if grep -q "WP_DEBUG.*true\|DEBUG.*enabled" "$temp_dir"/*.tmp 2>/dev/null; then
generate_remediation "wp_debug_enabled" "true" "CRITICAL"
remediation_count=$((remediation_count + 1))
echo ""
fi
# Check for backup files in docroot
if grep -q "CRITICAL.*Backup files in docroot" "$temp_dir"/*.tmp 2>/dev/null; then
echo -e "${REMEDIATION_CRITICAL}REMEDIATION: Remove Backup Files from Public Directory${REMEDIATION_NC}"
echo " These are blocking the site and wasting resources!"
echo ""
echo " Command: rm -rf /home/{user}/public_html/backup-*.tar.gz"
echo ""
remediation_count=$((remediation_count + 1))
echo ""
fi
echo -e "${REMEDIATION_WARNING}═══ HIGH-PRIORITY ISSUES (Fix Soon) ═══${REMEDIATION_NC}"
echo ""
# Check for XML-RPC
if grep -q "XML-RPC\|xmlrpc" "$temp_dir"/*.tmp 2>/dev/null; then
generate_remediation "xmlrpc_enabled" "true" "WARNING"
remediation_count=$((remediation_count + 1))
echo ""
fi
# Check for low PHP memory
if grep -q "CRITICAL.*memory" "$temp_dir"/*.tmp 2>/dev/null; then
generate_remediation "php_memory_low" "low" "WARNING"
remediation_count=$((remediation_count + 1))
echo ""
fi
# Check for low InnoDB buffer pool
if grep -q "buffer.*pool\|innodb" "$temp_dir"/*.tmp 2>/dev/null; then
generate_remediation "db_buffer_pool_small" "128M" "WARNING"
remediation_count=$((remediation_count + 1))
echo ""
fi
echo -e "${REMEDIATION_INFO}═══ OPTIMIZATION OPPORTUNITIES (Improve Performance) ═══${REMEDIATION_NC}"
echo ""
# Check for OPcache
if grep -q "OPcache\|opcache" "$temp_dir"/*.tmp 2>/dev/null; then
generate_remediation "opcache_disabled" "true" "INFO"
remediation_count=$((remediation_count + 1))
echo ""
fi
# Check for HTTP/2
if grep -q "HTTP/1\|http.*1\.1" "$temp_dir"/*.tmp 2>/dev/null; then
generate_remediation "http2_disabled" "true" "INFO"
remediation_count=$((remediation_count + 1))
echo ""
fi
if [ $remediation_count -eq 0 ]; then
echo -e "${REMEDIATION_SUCCESS}✓ No critical issues detected!${REMEDIATION_NC}"
echo ""
fi
echo "================================================================================================"
echo "Remediation recommendations generated: $remediation_count"
echo "================================================================================================"
echo ""
}
################################################################################
# REMEDIATION SUMMARY
################################################################################
# Print summary of what user should do
print_remediation_summary() {
local temp_dir="$1"
cat << 'EOF'
NEXT STEPS FOR OPTIMIZATION:
1. IMMEDIATE (Today):
□ Address any CRITICAL issues shown above
□ Review findings in the full report above
2. THIS WEEK:
□ Implement HIGH-PRIORITY optimizations
□ Test each change and monitor impact
3. THIS MONTH:
□ Implement OPTIMIZATION opportunities
□ Monitor performance improvements
□ Validate fixes are working
For detailed information about each check, see the full report above.
Need help implementing a fix? Each remediation includes exact commands to run.
EOF
}
################################################################################
# EXPORT FUNCTIONS
################################################################################
export -f generate_remediation
export -f analyze_findings_for_remediation
export -f print_remediation_summary
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