🚀 Lambda in Private VPC

November 26, 2025 · View on GitHub

Enterprise-grade multi-region active/active architecture with near-zero recovery time, comprehensive DNS failover, and AWS Resilience Hub policy compliance for mission-critical applications.

📋 Table of Contents

🌟 Project Overview
🔥 Why High Availability Matters
🏗️ Architecture Design
🔐 Security & Network Controls
⚡ Resilience Framework
🧪 Chaos Engineering
🔄 CI/CD Automation
🔧 Infrastructure as Code
📚 Documentation
📄 License

This project implements a highly resilient serverless architecture with AWS Lambda functions deployed in private VPCs across multiple AWS regions (Ireland and Frankfurt). It features comprehensive security controls, automated failover mechanisms, and stringent disaster recovery capabilities through AWS Resilience Hub policy enforcement.

mindmap
  root((Lambda in Private VPC))
    Infrastructure["🏢 Infrastructure"]
      ["Multi-Region VPCs"]
      ["Private Subnets"]
      ["VPC Endpoints"]
      ["DNS Firewall"]
      ["Flow Logs"]
    Security["🔒 Security"]
      ["Private DNS"]
      ["WAF Protection"]
      ["Network ACLs"]
      ["IAM Least Privilege"]
      ["KMS Encryption"]
    Resilience["🛡️ Resilience"]
      ["Mission-Critical Policy"]
      ["RTO/RPO Enforcement"]
      ["Multi-Region Active/Active"]
      ["Automatic Failover"]
      ["Chaos Engineering Tests"]
    Data["💾 Data Layer"]
      ["DynamoDB Global Tables"]
      ["Cross-Region Replication"]
      ["Point-in-Time Recovery"]
      ["Backup/Restore Automation"]
      ["Dead Letter Queues"]
    Compute["⚙️ Compute & API"]
      ["Lambda Functions"]
      ["API Gateway"]
      ["Custom Domain"]
      ["Route 53 Failover"]
      ["Health Checks"]
    CI_CD["🔄 CI/CD & Observability"]
      ["Security Scanning"]
      ["Automated Deployment"]
      ["CloudWatch Monitoring"]
      ["X-Ray Tracing"]
      ["Alarm Notifications"]

Key Resilience Metrics

99.99% Uptime through multi-region active/active architecture
Near-zero RPO with DynamoDB global tables and cross-region replication
Region-level RTO of 1 hour enforced by AWS Resilience Hub policy
Comprehensive security controls with private VPCs and WAF protection
Automated failover through Route 53 health checks and weighted routing
Mission-critical compliance with industry best practices and standards

🔥 Why High Availability Matters

High availability isn't just a technical preference—it's a business imperative with far-reaching implications for modern organizations. Our multi-region active/active architecture directly addresses the following critical concerns:

mindmap
  root((High Availability<br>Impact Areas))
    Financial["💰 Financial Impact"]
      ["Direct Revenue Loss"]
      ["Recovery Costs"]
      ["Regulatory Penalties"]
      ["Operational Inefficiencies"]
    Operational["🏢 Operational Impact"]
      ["Process Disruption"]
      ["Decision Delays"]
      ["Workflow Interruption"]
      ["Productivity Loss"]
    Reputational["🌐 Reputation & Trust"]
      ["Customer Confidence"]
      ["Brand Perception"]
      ["Market Position"]
      ["Partner Relations"]
    Compliance["📜 Regulatory & Compliance"]
      ["Evidence Collection"]
      ["Audit Requirements"]
      ["Control Efficacy"]
      ["Legal Consequences"]

💰 Financial Impact of Downtime

Direct Revenue Impact: For mission-critical systems, downtime typically costs $1,000-5,000 per minute
Recovery Expenses: Emergency response activities and overtime costs add 30-50% to normal operational costs
SLA Violations: Financial penalties for failing to meet contractual uptime commitments
Operational Inefficiency: Teams resort to slower manual processes during outages, reducing productivity by 40-60%

🏢 Operational Consequences

Critical Process Disruption: Security assessment and compliance processes stall during outages
Decision Quality Degradation: Lack of real-time data forces decisions based on incomplete information
Cross-system Impacts: Dependent systems and integration partners experience cascading failures
Recovery Time Drain: IT teams diverted from strategic initiatives to handle recovery operations

📊 Reputation and Market Position

pie title Reputational Impact By Hours of Downtime
    "1 hour (Low Impact)" : 1
    "2-4 hours (Moderate)" : 3
    "8-12 hours (High)" : 7
    "24+ hours (Severe)" : 9
    "48+ hours (Critical)" : 8

Trust Erosion: Customer confidence drops significantly after prolonged or repeated outages
Brand Damage: Social media amplifies service disruptions, creating lasting negative impressions
Competitive Disadvantage: Competitors with better uptime gain market advantage during outages
Partner Relations: Service disruptions strain relationships with business partners and integrators

📜 Compliance Requirements

graph TB
    subgraph "Regulatory & Compliance Impact"
        A1[Application Downtime] --> B1[Compliance Evidence Gaps]
        A1 --> B2[Audit Trail Disruption]
        A1 --> B3[Assessment Continuity Loss]

        B1 --> C1[Regulatory Requirements Violations]
        B2 --> C2[Audit Support Challenges]
        B3 --> C3[Compliance Posture Degradation]
    end

    classDef process fill:#f5f5f5,stroke:#333,stroke-width:1px;
    classDef impact fill:#ffeeee,stroke:#333,stroke-width:1px;
    classDef consequence fill:#ffcccc,stroke:#333,stroke-width:1px;

    class A1 process;
    class B1,B2,B3 process;
    class C1,C2,C3 impact;

NIST 800-53: Controls CP-2 (Contingency Plan), CP-7 (Alternate Processing Site), and CP-10 (System Recovery)
ISO 27001:2022: Requirements A.17.1.1 through A.17.2.1 for business continuity and availability management
PCI DSS: Requirements 12.10.1 for incident response capabilities and maintaining service availability
GDPR: Obligations for ensuring "availability and resilience of processing systems and services"
Industry SLAs: Contractual uptime requirements that carry financial and legal penalties when breached

Our multi-region active/active architecture, with its comprehensive resilience framework, addresses all these concerns by providing near-zero RTO/RPO metrics, automatic failover capabilities, and robust compliance documentation that satisfies regulatory requirements across multiple frameworks.

🏗️ Architecture Design

A true active/active multi-region architecture with isolated private subnets, global data replication, and automated failover systems.

flowchart TB
    subgraph "Multi-Region Active/Active Architecture"
        subgraph "Ireland (eu-west-1)"
            IR_VPC["VPC 10.1.0.0/16"]
            IR_SUBNETS["Private Subnets (3 AZs)"]
            IR_LAMBDA["Lambda Functions"]
            IR_DYNAMO["DynamoDB Global Table"]
            IR_API["API Gateway"]
            IR_DOMAIN["Custom Domain"]
            IR_DNS["DNS Firewall"]
            IR_EP["VPC Endpoints"]
            
            IR_VPC --> IR_SUBNETS
            IR_SUBNETS --> IR_LAMBDA
            IR_LAMBDA --> IR_DYNAMO
            IR_LAMBDA --> IR_API
            IR_API --> IR_DOMAIN
            IR_VPC --> IR_DNS
            IR_SUBNETS --> IR_EP
        end
        
        subgraph "Frankfurt (eu-central-1)"
            FR_VPC["VPC 10.5.0.0/16"]
            FR_SUBNETS["Private Subnets (3 AZs)"]
            FR_LAMBDA["Lambda Functions"]
            FR_DYNAMO["DynamoDB Global Table"]
            FR_API["API Gateway"]
            FR_DOMAIN["Custom Domain"]
            FR_DNS["DNS Firewall"]
            FR_EP["VPC Endpoints"]
            
            FR_VPC --> FR_SUBNETS
            FR_SUBNETS --> FR_LAMBDA
            FR_LAMBDA --> FR_DYNAMO
            FR_LAMBDA --> FR_API
            FR_API --> FR_DOMAIN
            FR_VPC --> FR_DNS
            FR_SUBNETS --> FR_EP
        end
        
        IR_DOMAIN -.-> R53["Route 53 Weighted/Failover"]
        FR_DOMAIN -.-> R53
        IR_DYNAMO <--> FR_DYNAMO
        
        WAF["WAF v2"] --> IR_API
        WAF --> FR_API
        
        HC["Health Checks"] --> IR_API
        HC --> FR_API
        HC -.-> R53
        
        REH["AWS Resilience Hub<br>Mission Critical Policy"] --> IR_LAMBDA
        REH --> FR_LAMBDA
        REH --> IR_DYNAMO
        REH --> FR_DYNAMO
    end

    classDef ireland fill:#4CAF50,stroke:#2E7D32,stroke-width:3px,color:#ffffff
    classDef frankfurt fill:#2196F3,stroke:#1565C0,stroke-width:3px,color:#ffffff
    classDef security fill:#F44336,stroke:#D32F2F,stroke-width:3px,color:#ffffff
    classDef routing fill:#FF9800,stroke:#F57C00,stroke-width:3px,color:#ffffff
    classDef resilience fill:#9C27B0,stroke:#7B1FA2,stroke-width:3px,color:#ffffff
    classDef monitoring fill:#FFC107,stroke:#FFA000,stroke-width:3px,color:#000000
    
    class IR_VPC,IR_SUBNETS,IR_LAMBDA,IR_DYNAMO,IR_API,IR_DOMAIN,IR_DNS,IR_EP ireland
    class FR_VPC,FR_SUBNETS,FR_LAMBDA,FR_DYNAMO,FR_API,FR_DOMAIN,FR_DNS,FR_EP frankfurt
    class WAF security
    class R53 routing
    class REH resilience
    class HC monitoring

Key Architecture Components

Component	Implementation	Purpose
Private VPC Infrastructure	Dedicated VPCs in each region (10.1.0.0/16 & 10.5.0.0/16)	Network isolation and security
Multi-AZ Deployment	3 subnets across availability zones per region	High availability within each region
VPC Endpoints	Interface & Gateway endpoints for S3, EC2, DynamoDB	Secure AWS service access without internet exposure
DNS Firewall	Allow *.amazonaws.com, block all others	Control outbound DNS traffic from VPC
API Gateway	Regional endpoints with custom domain names	Exposing Lambda functions securely
Lambda Functions	Node.js 20.x with VPC configuration	Serverless compute in private subnets
Global Tables	DynamoDB with multi-region replication	Consistent data across regions with near-zero RPO
Route 53 Routing	Weighted records with health check failover	Intelligent traffic distribution across regions

🔐 Security & Network Controls

graph TD
    subgraph "Comprehensive Security Framework"
        VPC["🏢 VPC Security"]
        NW["🔌 Network Controls"]
        IAM["🔑 Identity & Access"]
        DATA["🔒 Data Protection"]
        APP["🛡️ Application Security"]
        
        VPC --> DNS_FW["DNS Firewall<br>Allow AWS domains only"]
        VPC --> FLOW["Flow Logs<br>Network traffic auditing"]
        VPC --> PDNS["Private DNS<br>Secure name resolution"]
        
        NW --> NACL["Network ACLs<br>Stateless filtering"]
        NW --> SG["Security Groups<br>Stateful filtering"]
        NW --> DENY["Explicit denials<br>Block RDP (3389)"]
        
        IAM --> ROLES["Fine-grained roles<br>Least privilege"]
        IAM --> POLICY["Resource-based policies"]
        IAM --> TEMP["Temporary credentials"]
        
        DATA --> KMS["KMS Encryption<br>Custom keys"]
        DATA --> ENC_SNS["Encrypted SNS topics"]
        DATA --> ENC_LOG["Encrypted log groups"]
        
        APP --> WAF_IP["WAF IP reputation list"]
        APP --> WAF_ANON["WAF Anonymous IP protection"]
        APP --> WAF_CRS["WAF Common Rule Set"]
        APP --> WAF_BAD["WAF Known Bad Inputs"]
        APP --> WAF_OS["WAF OS protection rules"]
    end

    classDef vpc fill:#2E7D32,stroke:#1B5E20,stroke-width:2px,color:#FFFFFF
    classDef network fill:#1565C0,stroke:#0D47A1,stroke-width:2px,color:#FFFFFF  
    classDef iam fill:#D32F2F,stroke:#B71C1C,stroke-width:2px,color:#FFFFFF
    classDef data fill:#7B1FA2,stroke:#4A148C,stroke-width:2px,color:#FFFFFF
    classDef app fill:#F57C00,stroke:#E65100,stroke-width:2px,color:#FFFFFF
    
    class VPC,DNS_FW,FLOW,PDNS vpc
    class NW,NACL,SG,DENY network
    class IAM,ROLES,POLICY,TEMP iam
    class DATA,KMS,ENC_SNS,ENC_LOG data
    class APP,WAF_IP,WAF_ANON,WAF_CRS,WAF_BAD,WAF_OS app

Network Security Features

Security Control	Implementation	Details
Private VPC Design	No internet gateways or NAT gateways	Complete isolation from public internet
DNS Firewall Rules	Two rules (Allow AWS, Block All)	Only permits *.amazonaws.com domains
Custom Network ACLs	Inbound/outbound rule sets	Blocks RDP (3389), limits outbound to HTTPS (443)
Security Group Rules	Precise traffic control	Lambda-to-endpoints only, no other traffic
VPC Flow Logs	Integration with CloudWatch	Network traffic visibility with encrypted storage
WAF Protection	Six managed rule groups	IP reputation, anonymous IP, common attacks, Linux/Unix protection
KMS Encryption	Custom key with automatic rotation	Encrypts SNS topics, CloudWatch logs
IAM Least Privilege	Scoped down permissions	Specific roles and permissions for each component

⚡ Resilience Framework

The AWS Resilience Hub integration enforces strict recovery time objectives (RTO) and recovery point objectives (RPO) through policy compliance and automated assessment.

graph TD
    subgraph "Mission Critical Resilience Framework"
        POLICY["Mission Critical Policy"]
        
        subgraph "Failure Domains"
            REGION["Regional Failure"]
            AZ["AZ Failure"]
            HW["Hardware Failure"]
            SW["Software Failure"]
        end
        
        POLICY --> REGION
        POLICY --> AZ
        POLICY --> HW
        POLICY --> SW
        
        REGION --> REG_RTO["RTO: 3600s (1h)"]
        REGION --> REG_RPO["RPO: 5s"]
        
        AZ --> AZ_RTO["RTO: 1s"]
        AZ --> AZ_RPO["RPO: 1s"]
        
        HW --> HW_RTO["RTO: 1s"]
        HW --> HW_RPO["RPO: 1s"]
        
        SW --> SW_RTO["RTO: 5400s (90m)"]
        SW --> SW_RPO["RPO: 300s (5m)"]
    end
    
    subgraph "Implementation Components"
        REG_RTO --> MULTI_REG["Multi-region active/active"]
        REG_RPO --> DDB_GLOB["DynamoDB global tables"]
        
        AZ_RTO & AZ_RPO --> MULTI_AZ["Multi-AZ deployment"]
        
        HW_RTO & HW_RPO --> AWS_INFRA["AWS infrastructure redundancy"]
        
        SW_RTO --> AUTO_RECOVER["Automated recovery procedures"]
        SW_RPO --> BACKUP_STRAT["Comprehensive backup strategy"]
    end

    classDef policy fill:#7B1FA2,stroke:#4A148C,stroke-width:3px,color:#FFFFFF
    classDef region fill:#D32F2F,stroke:#B71C1C,stroke-width:2px,color:#FFFFFF
    classDef az fill:#1565C0,stroke:#0D47A1,stroke-width:2px,color:#FFFFFF
    classDef hardware fill:#2E7D32,stroke:#1B5E20,stroke-width:2px,color:#FFFFFF
    classDef software fill:#F57C00,stroke:#E65100,stroke-width:2px,color:#FFFFFF
    classDef rto fill:#FFC107,stroke:#FFA000,stroke-width:2px,color:#000000
    classDef rpo fill:#9C27B0,stroke:#7B1FA2,stroke-width:2px,color:#FFFFFF
    classDef impl fill:#607D8B,stroke:#455A64,stroke-width:2px,color:#FFFFFF
    
    class POLICY policy
    class REGION region
    class AZ az
    class HW hardware
    class SW software
    class REG_RTO,AZ_RTO,HW_RTO,SW_RTO rto
    class REG_RPO,AZ_RPO,HW_RPO,SW_RPO rpo
    class MULTI_REG,DDB_GLOB,MULTI_AZ,AWS_INFRA,AUTO_RECOVER,BACKUP_STRAT impl

Recovery Time & Point Objectives

Failure Domain	RTO	RPO	Implementation Strategy
Regional	3600s (1 hour)	5s	Multi-region active/active with Route 53 failover, Global Tables
Availability Zone	1s	1s	Multi-AZ deployment with automatic failover
Hardware	1s	1s	AWS managed infrastructure redundancy
Software	5400s (90 min)	300s (5 min)	Automated recovery procedures, backup/restore, chaos testing

🧪 Chaos Engineering

The architecture includes comprehensive disaster recovery testing using AWS Fault Injection Service (FIS) to validate resilience capabilities.

flowchart TD
    subgraph "Chaos Engineering Framework"
        DR["Fault Injection Service<br>Experiments"]
        
        subgraph "API Resilience Tests"
            API_FAIL["Lambda Access<br>Denial"]
            API_FAIL --> SSM_IAM["IAM Policy<br>Injection"]
            SSM_IAM --> DENY_LAMBDA["Deny Lambda<br>Access"]
        end
        
        subgraph "Data Layer Tests"
            DDB_DEL["DynamoDB<br>Table Deletion"]
            DDB_DEL --> SSM_DEL["Table Delete<br>Automation"]
            
            PITR["Point-In-Time<br>Recovery Test"]
            PITR --> SSM_PITR["PITR Restore<br>Automation"]
            
            BACKUP["Backup<br>Restoration Test"]
            BACKUP --> SSM_BACK["Backup Restore<br>Automation"]
        end
        
        DR --> API_FAIL
        DR --> DDB_DEL
        DR --> PITR
        DR --> BACKUP
        
        subgraph "Recovery Monitoring"
            MONITOR["Health Check<br>Monitoring"]
            FAILOVER["Route 53<br>Failover"]
            RESTORE["Recovery<br>Procedures"]
        end
        
        SSM_IAM & SSM_DEL & SSM_PITR & SSM_BACK --> MONITOR
        MONITOR --> FAILOVER
        MONITOR --> RESTORE
    end

    classDef framework fill:#7B1FA2,stroke:#4A148C,stroke-width:3px,color:#FFFFFF
    classDef experiment fill:#1565C0,stroke:#0D47A1,stroke-width:2px,color:#FFFFFF
    classDef automation fill:#2E7D32,stroke:#1B5E20,stroke-width:2px,color:#FFFFFF
    classDef action fill:#F57C00,stroke:#E65100,stroke-width:2px,color:#FFFFFF
    classDef monitoring fill:#FFC107,stroke:#FFA000,stroke-width:2px,color:#000000
    classDef recovery fill:#D32F2F,stroke:#B71C1C,stroke-width:2px,color:#FFFFFF
    
    class DR framework
    class API_FAIL,DDB_DEL,PITR,BACKUP experiment
    class SSM_IAM,SSM_DEL,SSM_PITR,SSM_BACK automation
    class DENY_LAMBDA action
    class MONITOR monitoring
    class FAILOVER,RESTORE recovery

Chaos Test Scenarios

Test Scenario	Implementation	Success Metrics	Recovery Method
API Gateway Lambda Access Denial	IAM deny policy injection via SSM	Health check recovery time < RTO	Automatic failover to other region
DynamoDB Table Deletion	Scheduled table deletion via SSM	Table recreation time < RTO	Automated restore from backup or PITR
Point-In-Time Recovery	SSM automation document execution	Data recovery with RPO validation	Restoration to specified timestamp
Backup Restoration	SSM automation with backup ARN	Backup validation and integrity check	Full table recovery from backup
Route 53 Health Check Validation	Health check failure trigger	Weighted routing adjustment < RTO	Automatic traffic redistribution

🔄 CI/CD Automation

flowchart LR
    GH_PUSH["GitHub Push/<br>Workflow Dispatch"] --> SEC_SCAN{"Security<br>Scanning"}
    
    SEC_SCAN --> CFN_LINT["cfn-lint"]
    SEC_SCAN --> CFN_NAG["cfn-nag"]
    SEC_SCAN --> CHECKOV["Checkov"]
    SEC_SCAN --> SCORECARD["Scorecard"]
    SEC_SCAN --> ZAP["ZAP API<br>Scan"]
    
    CFN_LINT & CFN_NAG & CHECKOV & SCORECARD & ZAP --> CONFIG_IR["Configure AWS<br>(eu-west-1)"]
    
    CONFIG_IR --> DEPLOY_IR["Deploy Core<br>Ireland"]
    DEPLOY_IR --> OUTPUTS["Collect<br>Outputs"]
    OUTPUTS --> CONFIG_FR["Configure AWS<br>(eu-central-1)"]
    CONFIG_FR --> DEPLOY_FR["Deploy Core<br>Frankfurt"]
    
    DEPLOY_FR --> DEPLOY_AUX["Deploy<br>Auxiliary Stacks"]
    
    DEPLOY_AUX --> DEPLOY_R53["Route 53<br>Configuration"]
    DEPLOY_AUX --> DEPLOY_WAF["WAF<br>Configuration"]
    DEPLOY_AUX --> DEPLOY_RHB["Resilience Hub<br>App"]
    DEPLOY_AUX --> DEPLOY_DR["Disaster<br>Recovery Tests"]
    
    DEPLOY_R53 & DEPLOY_WAF & DEPLOY_RHB & DEPLOY_DR --> TAG["Tag &<br>Release"]
    
    classDef trigger fill:#D32F2F,stroke:#B71C1C,stroke-width:3px,color:#FFFFFF
    classDef security fill:#7B1FA2,stroke:#4A148C,stroke-width:2px,color:#FFFFFF
    classDef scan fill:#2E7D32,stroke:#1B5E20,stroke-width:2px,color:#FFFFFF
    classDef deploy fill:#1565C0,stroke:#0D47A1,stroke-width:2px,color:#FFFFFF
    classDef aux fill:#F57C00,stroke:#E65100,stroke-width:2px,color:#FFFFFF
    classDef release fill:#9C27B0,stroke:#7B1FA2,stroke-width:2px,color:#FFFFFF
    
    class GH_PUSH trigger
    class SEC_SCAN security
    class CFN_LINT,CFN_NAG,CHECKOV,SCORECARD,ZAP scan
    class CONFIG_IR,DEPLOY_IR,OUTPUTS,CONFIG_FR,DEPLOY_FR deploy
    class DEPLOY_AUX,DEPLOY_R53,DEPLOY_WAF,DEPLOY_RHB,DEPLOY_DR aux
    class TAG release

CI/CD Pipeline Features

Pre-Commit Security Validation: Multiple scanning tools analyze infrastructure templates
Sequential Multi-Region Deployment: Ireland (primary) followed by Frankfurt (secondary)
Cross-Region Resource Integration: Output collection and sharing between deployments
Auxiliary Resource Configuration: Route 53, WAF, Resilience Hub, and Disaster Recovery
Automated Version Management: Git tagging and release notes generation
Rollback Capability: Automatic reversal on deployment failures

🔧 Infrastructure as Code

This project is entirely defined using CloudFormation templates with comprehensive resource definitions for each component.

Template Structure

Template	Description	Key Resources
template.yml	Core Infrastructure	VPCs, Subnets, Lambda Functions, API Gateway, DynamoDB, DNS Firewall, Security Groups, Network ACLs, Flow Logs, KMS Keys
route53.yml	DNS Configuration	Weighted A/AAAA Records, Health Check Integration, Failover Configuration, Domain Name Integration
app.yml	Resilience Hub	Mission Critical Policy Definition, RTO/RPO Targets, Multi-Resource Mapping, Assessment Schedule
disaster-recovery.yml	DR Testing	FIS Experiments, SSM Automation Documents, IAM Roles & Policies, Recovery Procedures, Health Checks
waf.yml	Security Rules	WAF WebACL, AWS Managed Rule Groups, API Gateway Association

Notable Infrastructure Features

DNS Firewall Integration: Fully configured Route 53 DNS Firewall allowing only AWS domains
Private DNS Configuration: Secure VPC DNS settings with customized resolution
Comprehensive Network Controls: Custom ACLs and security groups with explicit deny rules
Health Check System: Multiple Route 53 health checks for various service components
Advanced WAF Protection: Six AWS managed rule groups including IP reputation and known attacks
Global DynamoDB Tables: Cross-region replication with point-in-time recovery
Principle of Least Privilege: Narrowly scoped IAM roles and permissions for all resources

📚 Documentation

Comprehensive Runbooks

DynamoDB Recovery Runbook: Automated Systems Manager procedures for:
- Point-in-Time Recovery
- Backup Restoration
- Table Recreation
- Cross-Region Synchronization
Lambda Function Recovery Runbook: Procedures covering:
- Version Management
- Provisioned Concurrency Adjustment
- Memory/Execution Time Optimization
- Error Handling and Retry Logic
API Gateway Recovery Runbook: Workflow documentation for:
- Endpoint Restoration
- Custom Domain Reconfiguration
- WAF Integration Recovery
- Route 53 Health Check Adjustments
IAM Automation Runbook: Procedures for:
- Role and Policy Recovery
- Permission Boundary Enforcement
- Trust Relationship Verification
- Cross-Account Access Management