fmard/pdf-api
0
1<!DOCTYPE html>2<html lang="en">3<head>4 <meta charset="UTF-8">5 <title>{{ title | default("Technical Report") }}</title>6 <style>7 * { margin: 0; padding: 0; box-sizing: border-box; }8 body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; padding: 40px; font-size: 14px; line-height: 1.6; color: #1a1a2e; }9 .header { border-bottom: 3px solid #4f46e5; padding-bottom: 20px; margin-bottom: 30px; }10 .header .doc-number { font-size: 12px; color: #4f46e5; font-weight: 600; letter-spacing: 0.5px; margin-bottom: 8px; }11 .header h1 { font-size: 24px; color: #1a1a2e; margin-bottom: 8px; }12 .header .subtitle { font-size: 15px; color: #666; }13 .meta-table { width: 100%; border-collapse: collapse; margin-bottom: 30px; background: #f9fafb; border-radius: 8px; overflow: hidden; }14 .meta-table td { padding: 10px 15px; border-bottom: 1px solid #e5e7eb; }15 .meta-table td:first-child { width: 160px; font-weight: 600; color: #666; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }16 .meta-table td:last-child { color: #333; }17 .section { margin-bottom: 30px; }18 .section h2 { font-size: 18px; color: #4f46e5; margin-bottom: 12px; padding-bottom: 6px; border-bottom: 1px solid #e5e7eb; }19 .section h3 { font-size: 15px; color: #333; margin: 15px 0 8px; }20 .section p { margin-bottom: 10px; color: #444; }21 .specs-table { width: 100%; border-collapse: collapse; margin: 15px 0; }22 .specs-table th { background: #4f46e5; color: white; padding: 10px 14px; text-align: left; font-size: 12px; text-transform: uppercase; }23 .specs-table td { padding: 10px 14px; border-bottom: 1px solid #eee; }24 .specs-table tr:nth-child(even) { background: #f9fafb; }25 .code-block { background: #1e1e2e; color: #cdd6f4; padding: 15px 20px; border-radius: 8px; font-family: 'JetBrains Mono', 'Fira Code', monospace; font-size: 12px; margin: 15px 0; overflow-x: auto; white-space: pre; }26 .diagram-placeholder { background: #f9fafb; border: 2px dashed #e0e2ff; border-radius: 8px; padding: 40px; text-align: center; color: #999; margin: 15px 0; }27 .callout { background: #f8f9ff; border-left: 4px solid #4f46e5; padding: 15px 20px; border-radius: 0 6px 6px 0; margin: 15px 0; }28 .callout strong { color: #4f46e5; }29 .warning { background: #fef3c7; border-left: 4px solid #f59e0b; padding: 15px 20px; border-radius: 0 6px 6px 0; margin: 15px 0; }30 .warning strong { color: #92400e; }31 .steps-list { list-style: none; padding: 0; counter-reset: step; }32 .steps-list li { padding: 12px 15px 12px 50px; margin-bottom: 8px; background: #f9fafb; border-radius: 6px; position: relative; counter-increment: step; }33 .steps-list li::before { content: counter(step); position: absolute; left: 15px; top: 12px; width: 24px; height: 24px; background: #4f46e5; color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 600; }34 .appendix { background: #f9fafb; padding: 20px; border-radius: 8px; margin-top: 30px; }35 .appendix h3 { color: #4f46e5; margin-bottom: 10px; font-size: 14px; }36 .footer { margin-top: 40px; padding-top: 20px; border-top: 1px solid #e5e7eb; font-size: 12px; color: #999; text-align: center; }37 </style>38</head>39<body>40 <div class="header">41 <div class="doc-number">{{ doc_number | default("TR-2024-0042") }}</div>42 <h1>{{ title | default("System Architecture Migration: Monolith to Microservices") }}</h1>43 <div class="subtitle">{{ subtitle | default("Technical Analysis and Implementation Plan") }}</div>44 </div>45 46 <table class="meta-table">47 <tr><td>Author</td><td>{{ author | default("Dr. Emily Zhang, Principal Architect") }}</td></tr>48 <tr><td>Department</td><td>{{ department | default("Engineering & Technology") }}</td></tr>49 <tr><td>Date</td><td>{{ date | default("January 15, 2024") }}</td></tr>50 <tr><td>Version</td><td>{{ version | default("2.1") }}</td></tr>51 <tr><td>Classification</td><td>{{ classification | default("Internal — Technical Staff") }}</td></tr>52 <tr><td>Reviewers</td><td>{{ reviewers | default("CTO, VP Engineering, Security Team Lead") }}</td></tr>53 </table>54 55 <div class="section">56 <h2>1. Introduction</h2>57 <p>{{ introduction | default("This technical report presents a comprehensive analysis of the proposed migration from monolithic architecture to a microservices-based system. The document covers the current system assessment, proposed architecture, migration strategy, risk analysis, and implementation timeline. This migration is driven by scalability requirements, deployment velocity needs, and team autonomy objectives.") }}</p>58 </div>59 60 <div class="section">61 <h2>2. Current System Analysis</h2>62 <p>{{ current_system | default("The existing monolithic application comprises approximately 450,000 lines of code organized across 12 modules. The system handles 2.3 million requests per day with an average response time of 340ms. Key pain points include deployment frequency limited to bi-weekly releases, inability to scale individual components, and developer onboarding time exceeding 3 months.") }}</p>63 64 <h3>2.1 Performance Metrics</h3>65 <table class="specs-table">66 <thead>67 <tr>68 <th>Metric</th>69 <th>Current</th>70 <th>Target</th>71 <th>Improvement</th>72 </tr>73 </thead>74 <tbody>75 {% for spec in performance_metrics | default([{"metric": "Avg Response Time", "current": "340ms", "target": "120ms", "improvement": "65% faster"}, {"metric": "Deployment Frequency", "current": "Bi-weekly", "target": "Multiple/day", "improvement": "14x increase"}, {"metric": "Recovery Time", "current": "45 min", "target": "< 5 min", "improvement": "90% reduction"}, {"metric": "Scalability", "current": "Vertical only", "target": "Horizontal", "improvement": "Auto-scaling"}]) %}76 <tr>77 <td><strong>{{ spec.metric }}</strong></td>78 <td>{{ spec.current }}</td>79 <td>{{ spec.target }}</td>80 <td>{{ spec.improvement }}</td>81 </tr>82 {% endfor %}83 </tbody>84 </table>85 </div>86 87 <div class="section">88 <h2>3. Proposed Architecture</h2>89 <p>{{ proposed_arch | default("The proposed microservices architecture decomposes the monolith into 8 bounded contexts, each deployed as an independent service. Services communicate via asynchronous messaging (Apache Kafka) for event-driven workflows and synchronous gRPC for real-time queries.") }}</p>90 <div class="diagram-placeholder">91 🏗️ Architecture Diagram: Microservices Topology with Service Mesh92 </div>93 94 <h3>3.1 Technology Stack</h3>95 <table class="specs-table">96 <thead>97 <tr>98 <th>Component</th>99 <th>Technology</th>100 <th>Rationale</th>101 </tr>102 </thead>103 <tbody>104 {% for tech in tech_stack | default([{"component": "Runtime", "technology": "Go / Node.js", "rationale": "Performance + developer productivity"}, {"component": "Messaging", "technology": "Apache Kafka", "rationale": "Event streaming, durability, ordering"}, {"component": "API Gateway", "technology": "Kong / Envoy", "rationale": "Rate limiting, auth, observability"}, {"component": "Orchestration", "technology": "Kubernetes", "rationale": "Auto-scaling, self-healing, declarative"}, {"component": "Observability", "technology": "OpenTelemetry + Grafana", "rationale": "Distributed tracing, unified monitoring"}]) %}105 <tr>106 <td><strong>{{ tech.component }}</strong></td>107 <td>{{ tech.technology }}</td>108 <td>{{ tech.rationale }}</td>109 </tr>110 {% endfor %}111 </tbody>112 </table>113 </div>114 115 <div class="callout">116 <strong>Key Design Decision:</strong> {{ design_decision | default("Adopting the Strangler Fig pattern for incremental migration, allowing the monolith and microservices to coexist during transition. This reduces risk by enabling rollback at any stage and maintaining system availability throughout the migration.") }}117 </div>118 119 <div class="section">120 <h2>4. Implementation Plan</h2>121 <ul class="steps-list">122 {% for step in implementation_steps | default([{"text": "Set up infrastructure (Kubernetes cluster, CI/CD pipelines, monitoring) — 4 weeks"}, {"text": "Extract Authentication & User Management service — 3 weeks"}, {"text": "Extract Payment Processing service with event sourcing — 4 weeks"}, {"text": "Extract Notification Engine as event-driven service — 2 weeks"}, {"text": "Extract Reporting & Analytics with CQRS pattern — 3 weeks"}, {"text": "Integration testing, load testing, and gradual traffic shifting — 4 weeks"}]) %}123 <li>{{ step.text }}</li>124 {% endfor %}125 </ul>126 </div>127 128 <div class="warning">129 <strong>Risk Notice:</strong> {{ risk_notice | default("Data consistency across services requires careful handling. Implement saga pattern for distributed transactions and ensure idempotent message processing. Estimated 2-week buffer allocated for addressing consistency edge cases during integration testing.") }}130 </div>131 132 <div class="section">133 <h2>5. Conclusion</h2>134 <p>{{ conclusion | default("The migration to microservices architecture will deliver significant improvements in deployment velocity, system resilience, and team autonomy. The phased approach using the Strangler Fig pattern minimizes risk while maintaining system availability. Total migration timeline is estimated at 20 weeks with a team of 6 engineers. Expected ROI through improved developer productivity and reduced infrastructure costs will be realized within 12 months post-migration.") }}</p>135 </div>136 137 <div class="footer">138 <p>{{ doc_number | default("TR-2024-0042") }} | {{ title | default("Technical Report") }} | Version {{ version | default("2.1") }}</p>139 <p>{{ company_name | default("Acme Engineering") }} — Internal Technical Documentation</p>140 </div>141</body>142</html>143