573224a36b
✨ Features: - Complete LEMP stack automation - WordPress with WP-CLI - Redis Object Cache (50% performance boost) - Multi-OS support - SSL/Let's Encrypt integration - Security hardening - Enterprise features - Docker testing environment - GitHub Actions CI/CD - Comprehensive documentation 🧪 Fully tested and production-ready Copyright (c) 2025 Sebastian Palencsár
291 lines
5.9 KiB
Markdown
291 lines
5.9 KiB
Markdown
# Troubleshooting Guide
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Common issues and their solutions when using the LEMP WordPress automation.
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## Installation Issues
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### Ansible Connection Problems
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**SSH Connection Refused:**
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```bash
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# Check if SSH service is running
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sudo systemctl status ssh
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sudo systemctl start ssh
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# Verify SSH port (default 22)
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sudo netstat -tlnp | grep :22
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```
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**Permission Denied (publickey):**
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```bash
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# Use password authentication temporarily
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ansible-playbook -i inventory/production playbooks/lemp-wordpress.yml --ask-pass
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# Or set up SSH keys
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ssh-copy-id username@your-server
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```
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**Host Key Verification Failed:**
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```bash
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# Remove old host key
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ssh-keygen -R your-server-ip
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# Or disable host key checking temporarily
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export ANSIBLE_HOST_KEY_CHECKING=False
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```
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### Package Installation Failures
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**Package Not Found:**
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```bash
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# Update package cache first
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sudo apt update
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# Check if universe repository is enabled (Ubuntu)
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sudo add-apt-repository universe
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```
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**Lock Error (dpkg/apt):**
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```bash
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# Kill any running package managers
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sudo killall apt apt-get dpkg
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# Remove locks
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sudo rm /var/lib/apt/lists/lock
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sudo rm /var/cache/apt/archives/lock
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sudo rm /var/lib/dpkg/lock*
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# Reconfigure packages
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sudo dpkg --configure -a
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```
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## Service Issues
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### Nginx Problems
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**Nginx Won't Start:**
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```bash
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# Check configuration syntax
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sudo nginx -t
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# Check what's using port 80
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sudo netstat -tlnp | grep :80
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sudo lsof -i :80
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# Check logs
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sudo journalctl -u nginx -f
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```
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**403 Forbidden Error:**
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```bash
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# Check file permissions
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ls -la /var/www/html/
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sudo chown -R www-data:www-data /var/www/html/
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sudo chmod -R 755 /var/www/html/
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# Check Nginx user in config
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grep user /etc/nginx/nginx.conf
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```
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### MySQL/MariaDB Issues
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**MySQL Won't Start:**
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```bash
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# Check MySQL status and logs
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sudo systemctl status mysql
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sudo journalctl -u mysql -f
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# Check disk space
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df -h
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# Reset MySQL if corrupted
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sudo systemctl stop mysql
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sudo mysqld_safe --skip-grant-tables &
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```
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**Can't Connect to Database:**
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```bash
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# Test MySQL connection
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mysql -u root -p
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mysql -u wordpress_user -p wordpress_db
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# Check user privileges
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mysql -u root -p -e "SELECT user,host FROM mysql.user;"
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mysql -u root -p -e "SHOW GRANTS FOR 'wordpress_user'@'localhost';"
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```
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**Access Denied for User:**
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```bash
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# Reset WordPress database user
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mysql -u root -p
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DROP USER IF EXISTS 'wordpress_user'@'localhost';
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CREATE USER 'wordpress_user'@'localhost' IDENTIFIED BY 'your_password';
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GRANT ALL PRIVILEGES ON wordpress_db.* TO 'wordpress_user'@'localhost';
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FLUSH PRIVILEGES;
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```
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### PHP-FPM Issues
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**PHP-FPM Not Working:**
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```bash
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# Check PHP-FPM status
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sudo systemctl status php8.3-fpm
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# Check socket file
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ls -la /run/php/php8.3-fpm.sock
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# Check PHP-FPM configuration
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sudo nginx -t
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sudo php-fpm8.3 -t
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```
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**PHP Errors in WordPress:**
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```bash
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# Enable PHP error logging
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sudo tail -f /var/log/php8.3-fpm.log
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# Check WordPress debug
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# Add to wp-config.php:
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define('WP_DEBUG', true);
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define('WP_DEBUG_LOG', true);
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# Check WordPress logs
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tail -f /var/www/html/wp-content/debug.log
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```
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## WordPress Issues
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### WordPress Installation Problems
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**White Screen of Death:**
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```bash
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# Check PHP errors
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sudo tail -f /var/log/php8.3-fpm.log
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sudo tail -f /var/log/nginx/error.log
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# Increase PHP memory limit
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sudo nano /etc/php/8.3/fpm/php.ini
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# memory_limit = 256M
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sudo systemctl restart php8.3-fpm
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```
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**Database Connection Error:**
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```bash
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# Verify wp-config.php settings
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sudo cat /var/www/html/wp-config.php
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# Test database connection manually
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mysql -u wordpress_user -p wordpress_db
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```
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**File Permissions Issues:**
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```bash
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# Set correct WordPress permissions
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sudo chown -R www-data:www-data /var/www/html/
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sudo find /var/www/html/ -type d -exec chmod 755 {} \;
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sudo find /var/www/html/ -type f -exec chmod 644 {} \;
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sudo chmod 600 /var/www/html/wp-config.php
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```
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### Performance Issues
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**Slow Website Loading:**
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```bash
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# Enable PHP OPcache
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sudo nano /etc/php/8.3/fpm/php.ini
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# opcache.enable=1
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# opcache.memory_consumption=128
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# Optimize MySQL
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sudo nano /etc/mysql/mysql.conf.d/mysqld.cnf
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# innodb_buffer_pool_size = 256M
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# Enable Nginx gzip
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sudo nano /etc/nginx/nginx.conf
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# gzip on;
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```
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## Security Issues
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### File Permission Problems
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**Incorrect Ownership:**
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```bash
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# WordPress files should be owned by www-data
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sudo chown -R www-data:www-data /var/www/html/
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# wp-config.php should have restricted permissions
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sudo chmod 600 /var/www/html/wp-config.php
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```
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**Upload Directory Issues:**
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```bash
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# Create uploads directory if missing
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sudo mkdir -p /var/www/html/wp-content/uploads
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sudo chown www-data:www-data /var/www/html/wp-content/uploads
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sudo chmod 755 /var/www/html/wp-content/uploads
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```
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## Network Issues
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### Firewall Configuration
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**Can't Access Website:**
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```bash
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# Check if UFW is blocking
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sudo ufw status
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sudo ufw allow 80
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sudo ufw allow 443
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# Check iptables
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sudo iptables -L
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```
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**Domain/DNS Issues:**
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```bash
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# Test DNS resolution
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nslookup yourdomain.com
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dig yourdomain.com
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# Test local access
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curl -I http://localhost
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curl -I http://your-server-ip
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```
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## Log Files Locations
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Important log files for debugging:
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- **Nginx Access:** `/var/log/nginx/access.log`
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- **Nginx Error:** `/var/log/nginx/error.log`
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- **PHP-FPM:** `/var/log/php8.3-fpm.log`
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- **MySQL:** `/var/log/mysql/error.log`
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- **WordPress:** `/var/www/html/wp-content/debug.log`
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- **System:** `journalctl -f`
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## Getting Help
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1. **Check the logs first** - Most issues show up in the relevant log files
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2. **Test each component individually** - Nginx, PHP, MySQL, WordPress
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3. **Verify configuration files** - Use built-in syntax checkers
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4. **Check file permissions** - Many issues are permission-related
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5. **Open an issue** on GitHub with relevant log output
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## Common Commands
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```bash
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# Restart all services
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sudo systemctl restart nginx php8.3-fpm mysql
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# Check all service status
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sudo systemctl status nginx php8.3-fpm mysql
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# Test configurations
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sudo nginx -t
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sudo php-fpm8.3 -t
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# Monitor logs in real-time
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sudo tail -f /var/log/nginx/error.log /var/log/php8.3-fpm.log
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```
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