Redis-Poc/Redis-Architecture-Diagram.html at main · yugandher2000/Redis-Poc · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>Redis Sentinel Architecture</title>
    <script src="https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js"></script>
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        .explanation {
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</head>
<body>
    <div class="container">
        <h1>🔄 Redis Sentinel Architecture</h1>

        <div class="mermaid">
graph TB
    subgraph "Spring Boot Application"
        subgraph "Configuration Layer"
            APP[ApplicationProperties]
            CONFIG[RedisConfig]
            YML[application.yml]
        end

        subgraph "Service Layer"
            CTRL[UserController]
            SVC[UserService]
            REDIS_SVC[RedisService]
            REPO[UserRepository]
        end

        subgraph "Redis Infrastructure"
            subgraph "Connection Factories"
                MCF[masterConnectionFactory<br/>ReadFrom.MASTER]
                RCF[replicaConnectionFactory<br/>ReadFrom.REPLICA_PREFERRED]
            end

            subgraph "Redis Templates"
                MT[masterRedisTemplate<br/>Writes + Transactions]
                RT[replicaRedisTemplate<br/>Reads Only]
            end

            subgraph "Cache Managers"
                MCM[masterCacheManager<br/>Write Operations]
                RCM[replicaCacheManager<br/>Read Operations]
                FCM[FallbackRedisCacheManager<br/>Primary Cache Manager]
            end
        end
    end

    subgraph "Redis Sentinel Cluster"
        subgraph "Sentinel Nodes"
            S1[Sentinel 1<br/>localhost:26379]
            S2[Sentinel 2<br/>localhost:26380]
            S3[Sentinel 3<br/>localhost:26381]
        end

        subgraph "Redis Nodes"
            RM[Redis Master<br/>mymaster<br/>localhost:6379]
            RR[Redis Replica<br/>localhost:6380]
        end
    end

    %% Configuration relationships
    YML --> APP
    APP --> CONFIG
    CONFIG --> MCF
    CONFIG --> RCF

    %% Template relationships
    MCF --> MT
    RCF --> RT

    %% Cache manager relationships
    MT --> MCM
    RT --> RCM
    MCM --> FCM

    %% Service relationships
    CTRL --> SVC
    SVC --> REPO
    SVC --> REDIS_SVC
    REDIS_SVC --> MT
    REDIS_SVC --> RT

    %% Sentinel connections
    MCF -.->|"Discovers & Connects"| S1
    MCF -.->|"Discovers & Connects"| S2
    MCF -.->|"Discovers & Connects"| S3

    RCF -.->|"Discovers & Connects"| S1
    RCF -.->|"Discovers & Connects"| S2
    RCF -.->|"Discovers & Connects"| S3

    %% Sentinel monitoring
    S1 -.->|"Monitors"| RM
    S1 -.->|"Monitors"| RR
    S2 -.->|"Monitors"| RM
    S2 -.->|"Monitors"| RR
    S3 -.->|"Monitors"| RM
    S3 -.->|"Monitors"| RR

    %% Redis replication
    RM -->|"Replicates to"| RR

    %% Application connections
    MT -.->|"Writes"| RM
    RT -.->|"Reads (Preferred)"| RR
    RT -.->|"Reads (Fallback)"| RM

    %% Styling
    classDef configClass fill:#e1f5fe
    classDef serviceClass fill:#f3e5f5
    classDef redisInfra fill:#fff3e0
    classDef sentinelClass fill:#e8f5e8
    classDef redisNode fill:#ffebee

    class APP,CONFIG,YML configClass
    class CTRL,SVC,REDIS_SVC,REPO serviceClass
    class MCF,RCF,MT,RT,MCM,RCM,FCM redisInfra
    class S1,S2,S3 sentinelClass
    class RM,RR redisNode
        </div>

        <div class="explanation">
            <h3>🎯 Key Features:</h3>
            <ul>
                <li><strong>Automatic Failover:</strong> When master fails, replica becomes master</li>
                <li><strong>Read Scaling:</strong> Reads from replica, writes to master</li>
                <li><strong>Zero Downtime:</strong> Lettuce client handles reconnection automatically</li>
                <li><strong>High Availability:</strong> 3 sentinels ensure consensus</li>
                <li><strong>Monitoring:</strong> Built-in health checks for all nodes</li>
            </ul>

            <h3>🔄 Failover Process:</h3>
            <p>Master Fails → Sentinels Vote → Promote Replica → App Reconnects → Zero Downtime</p>
        </div>
    </div>

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</body>
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