# TF Grid Self-Healing Applications

The TF Grid ecosystem includes a range of self-healing applications that provide alternatives to traditional centralized services. These applications operate on a unique model where the App Service provider manages the applications while using the customer's slices, ensuring sovereignty and reliability.

## Core Principles

- **Sovereignty**: Users maintain ownership of their data and infrastructure
- **Self-Healing**: Applications automatically recover from failures
- **Decentralization**: No single point of control or failure
- **Privacy**: Data remains under user control
- **Reliability**: Continuous monitoring and automated recovery

## Application Development Approaches

- **Native Development**:
  - Applications built specifically for the TF Grid
  - Designed from the ground up for decentralized operation
  - Optimized for the Mycelium network architecture
  - Integrated with TF Grid monitoring and self-healing capabilities

- **Open Source Integration**:
  - Adaptation of existing open source solutions
  - Modified to work with TF Grid infrastructure
  - Enhanced with self-healing capabilities
  - Integrated with monitoring and backup systems

## Example Applications

- **Collaborative Office Suite** (GDrive Alternative):
  - Document, spreadsheet, and presentation creation and editing
  - Real-time collaboration capabilities
  - Version control and history
  - Integration with Mycelium Names for sharing
  - End-to-end encryption for security

- **Communication Platform** (Zoom Alternative):
  - Video conferencing with end-to-end encryption
  - Screen sharing and collaborative whiteboarding
  - Chat functionality with persistent history
  - No user data collection or tracking
  - Operates entirely on user-owned infrastructure

- **Customer Relationship Management** (CRM):
  - Contact and lead management
  - Sales pipeline tracking
  - Marketing campaign management
  - Analytics and reporting
  - Complete data sovereignty

- **Other Applications**:
  - Code repositories and development platforms
  - Database services
  - Content management systems
  - Email and messaging services
  - File storage and sharing

## Unique Service Model

- **Resource Ownership**:
  - Users provide their own slices (compute resources)
  - Data remains on user-controlled infrastructure
  - No vendor lock-in as with traditional SaaS

- **Service Provider Responsibilities**:
  - Application deployment and configuration
  - Ongoing maintenance and updates
  - Monitoring system health
  - Implementing self-healing procedures
  - Backup management
  - Security patching

- **Points Exchange**:

  - Users pay service providers in [TFP Points](./tfp.md) for management services
  - Payment based on service level and application complexity
  - No charges for the underlying infrastructure (user-owned)

## Self-Healing Architecture

```kroki-mermaid
graph TD
    subgraph "User-Owned Slices"
        S1[Application Slice 1]
        S2[Application Slice 2]
        S3[Database Slice]
        S4[Storage Slice]
    end
    
    subgraph "Service Provider Systems"
        MS[Monitoring System]
        AS[Alerting System]
        HS[Healing System]
        BS[Backup System]
        US[Update System]
    end
    
    MS --> S1
    MS --> S2
    MS --> S3
    MS --> S4
    
    MS --> AS
    AS --> HS
    HS --> S1
    HS --> S2
    HS --> S3
    HS --> S4
    
    BS --> S1
    BS --> S2
    BS --> S3
    BS --> S4
    
    US --> S1
    US --> S2
    US --> S3
    US --> S4
    
    classDef slice fill:#9cf,stroke:#333,stroke-width:1px;
    classDef system fill:#f96,stroke:#333,stroke-width:2px;
    
    class S1,S2,S3,S4 slice;
    class MS,AS,HS,BS,US system;
```

## Monitoring and Management

- **Continuous Monitoring**:
  - Real-time health checks of all system components
  - Performance metrics collection
  - Resource utilization tracking
  - Application-specific monitoring
  - Proactive issue detection

- **Automated Healing Processes**:
  - Service failure detection
  - Automatic service restart
  - Container or VM recreation when needed
  - Data consistency verification
  - Load balancing adjustments
  - Rollback to known good states when necessary

- **Backup Systems**:
  - Automated regular backups
  - Incremental and full backup options
  - Secure, encrypted backup storage
  - Point-in-time recovery capabilities
  - Backup verification and testing

- **Update Management**:
  - Zero-downtime updates where possible
  - Staged rollouts to minimize risk
  - Automatic rollback on failed updates
  - Security patch prioritization
  - Feature updates on scheduled cadence

## Deployment Process

- **Initial Setup**:
  - User allocates required slices based on application needs
  - Service provider deploys application components across slices
  - Initial configuration and customization
  - Integration with Mycelium Names and Gateways
  - Security hardening and testing

- **Ongoing Operation**:
  - 24/7 monitoring by service provider systems
  - Automatic scaling based on demand (using additional user slices)
  - Regular maintenance during defined windows
  - Performance optimization
  - Security audits and updates