20. Production High-Availability Cloud Deployment: Dockerized Moodle, Nginx Tuning & MySQL Clustering • Moodle LMS: Enterprise Architecture & Plugin Development • Rishabh Ki Kaksha

Moodle LMS: Enterprise Architecture & Plugin Development › 20. Production High-Availability Cloud Deployment: Dockerized Moodle, Nginx Tuning & MySQL Clustering

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Course Syllabus

Module 1: Moodle Core Architecture, Directory Structure & $CFG

01. Moodle Core Architecture: Modular Architecture, Directory Tree, $CFG & $SITE 02. Moodle Request Lifecycle: setup.php, config.php, $PAGE & $OUTPUT Renderers 03. The Frankenstyle Component Naming Convention & Plugin Types Taxonomy

Part 1: Core Architecture, Database & Plugin Dev

Module 2: Database Layer ($DB API) & XMLDB Schema Management

04. Moodle Database API ($DB): get_records, insert_record, execute & Safe Parameter Binding 05. XMLDB Schema Architecture: db/install.xml, upgrade.php & Automated Database Migrations 06. Complex SQL Queries with Recordsets, Pagination & Memory-Efficient Iterators

Part 2: Web Services, High-Scale MUC & AI Subsystem

Module 3: Plugin Development Lifecycle: Block, Local & Activity Modules

07. Building Custom Block Plugins (blocks/): Structure, view.php, Capabilities & Settings 08. Building Custom Local Plugins (local/): System Hooks, Navigation Injection & Cron Tasks 09. Building Custom Activity Modules (mod/): mod_form.php, Grades Integration & Completion API 10. Moodle Form API (moodleform): Validation Rules, File Manager & AJAX Elements

Module 4: Security, Access Control (Access API) & Authentication

11. Moodle Access API: Contexts Hierarchy, Roles, Capabilities (db/access.php) & has_capability() 12. Authentication Plugins (auth/): Single Sign-On (SSO), OAuth2, SAML & Active Directory Sync 13. Enrollment Plugins (enrol/): Automated Course Enrollment, Webhook Triggers & Subscriptions

Module 5: Web Services, Events & High-Scale Caching (MUC)

14. External REST Web Services: db/services.php, External API Functions & Mobile App Interop 15. Moodle Events API: Observer Pattern, Custom Events (core\event) & Triggering Webhooks 16. Moodle Task API: Ad-hoc Tasks vs Scheduled Cron Tasks with Queuing & Logging 17. Moodle Universal Cache (MUC): Definition of Cache (db/caches.php), Redis & Memory Scaling

Module 6: Enterprise AI Integration, Performance & Cloud Clustering

18. Moodle AI Subsystem (core_ai): Pluggable AI Providers, Course Summaries & Smart AI Tutors 19. Moodle Multi-Tier Enterprise Performance: Redis Session Caching, NFS Moodledata & Read Replicas 20. Production High-Availability Cloud Deployment: Dockerized Moodle, Nginx Tuning & MySQL Clustering

Interactive Lesson Studio

# 20. Production High-Availability Cloud Deployment: Dockerized Moodle, Nginx Tuning & MySQL Clustering

> Moodle LMS Enterprise Notes by Rishabh - Topic 20

---

### 1. Production Dockerized Moodle + Nginx Configuration 🐳

```dockerfile
FROM php:8.2-fpm-alpine

# Install required PHP extensions for Moodle:
RUN apk add --no-cache libpng-dev libjpeg-turbo-dev freetype-dev libzip-dev icu-dev openldap-dev \
    && docker-php-ext-configure gd --with-freetype --with-jpeg \
    && docker-php-ext-install -j$(nproc) gd mysqli pgsql pdo_mysql opcache zip intl soap ldap exif bcmath

# Copy custom production opcache config:
COPY opcache.ini /usr/local/etc/php/conf.d/opcache.ini
WORKDIR /var/www/moodle
```

---

### 2. High-Performance Nginx FastCGI Buffering Configuration

```nginx
location ~ ^(.+\.php)(.*)$ {
    fastcgi_split_path_info  ^(.+\.php)(.*)$;
    fastcgi_index            index.php;
    fastcgi_pass             moodle_php_fpm;
    include                  fastcgi_params;
    fastcgi_param   PATH_INFO       $fastcgi_path_info;
    fastcgi_param   SCRIPT_FILENAME $document_root$fastcgi_script_name;
    
    # FastCGI Buffering for massive file downloads:
    fastcgi_buffer_size 128k;
    fastcgi_buffers 256 16k;
    fastcgi_busy_buffers_size 256k;
    fastcgi_temp_file_write_size 256k;
}
```

---

### 3. Interview Ke 3 Sawal Is Topic Se

1. **Moodle maintenance mode CLI se zero downtime migration me kaise activate hota hai?** -> `php admin/cli/maintenance.php --enable` (Blocks incoming students while background upgrade script completes).
2. **Moodledata Filepool Content-Addressable Storage (SHA-1 hashing) storage kaise bachata hai?** -> Same 50MB course PDF 100 courses me upload hone par bhi disk par sirf 1 unique physical file (`mdl_files` table points via contenthash) store hoti hai.
3. **Database upgrade automated testing CI/CD pipeline me kaise chalti hai?** -> Test database snapshot restore karke `php admin/cli/upgrade.php --non-interactive` run karna aur exit code 0 verify karna.

---
**Course Completed:** Moodle LMS Enterprise Architecture, Plugins & Scaling (All 20 Lessons Completed!) 🎉🚀🎓⚡🧩🛡️💎

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Rishabh Gehlot

PHP 8+ & Laravel 11 Master Track