disaster-recovery.ts•37.6 kB
import { EventEmitter } from 'events';
import * as crypto from 'crypto';
export interface DisasterRecoveryPlan {
id: string;
name: string;
description: string;
version: string;
criticality: 'low' | 'medium' | 'high' | 'critical';
rto: number; // Recovery Time Objective in minutes
rpo: number; // Recovery Point Objective in minutes
components: RecoveryComponent[];
dependencies: PlanDependency[];
procedures: RecoveryProcedure[];
contacts: EmergencyContact[];
triggers: DisasterTrigger[];
testSchedule: TestSchedule;
compliance: ComplianceRequirement[];
documentation: PlanDocumentation;
status: 'draft' | 'approved' | 'active' | 'inactive' | 'archived';
lastTested: Date;
lastActivated?: Date;
created: Date;
modified: Date;
}
export interface RecoveryComponent {
id: string;
name: string;
type: 'application' | 'database' | 'infrastructure' | 'network' | 'storage' | 'service';
priority: number; // 1 = highest priority
dependencies: string[]; // component IDs
primaryLocation: Location;
recoveryLocation: Location;
backupSources: BackupSource[];
recoveryStrategies: RecoveryStrategy[];
healthChecks: HealthCheck[];
metrics: ComponentMetrics;
status: 'operational' | 'degraded' | 'failed' | 'recovering' | 'recovered';
}
export interface Location {
id: string;
name: string;
type: 'datacenter' | 'cloud-region' | 'edge' | 'hybrid';
region: string;
zone: string;
provider: string;
connectivity: ConnectivityInfo;
resources: ResourceInfo;
coordinates?: {
latitude: number;
longitude: number;
};
}
export interface ConnectivityInfo {
bandwidth: number; // Mbps
latency: number; // ms
redundancy: string[];
networkProviders: string[];
}
export interface ResourceInfo {
compute: {
cpu: number;
memory: number; // GB
storage: number; // GB
};
network: {
internalBandwidth: number;
externalBandwidth: number;
};
availability: number; // 0-1 (e.g., 0.9999 for 99.99%)
}
export interface BackupSource {
id: string;
type: 'full' | 'incremental' | 'differential' | 'snapshot' | 'replica';
location: string;
frequency: string; // cron expression
retention: number; // days
encryption: boolean;
compression: boolean;
lastBackup: Date;
nextBackup: Date;
size: number; // bytes
status: 'healthy' | 'warning' | 'error';
}
export interface RecoveryStrategy {
id: string;
name: string;
type: 'failover' | 'failback' | 'restore' | 'rebuild' | 'manual';
automationLevel: 'manual' | 'semi-automatic' | 'automatic';
estimatedTime: number; // minutes
procedures: ProcedureStep[];
prerequisites: string[];
rollbackProcedure?: ProcedureStep[];
successCriteria: SuccessCriteria[];
}
export interface ProcedureStep {
id: string;
name: string;
description: string;
type: 'manual' | 'script' | 'api-call' | 'command' | 'approval';
order: number;
timeout: number; // minutes
retries: number;
command?: string;
script?: string;
apiEndpoint?: string;
expectedResult?: string;
rollbackCommand?: string;
approvers?: string[];
dependencies: string[]; // step IDs
}
export interface SuccessCriteria {
id: string;
name: string;
metric: string;
operator: 'equals' | 'greater-than' | 'less-than' | 'contains';
expectedValue: any;
timeout: number; // minutes
critical: boolean;
}
export interface HealthCheck {
id: string;
name: string;
type: 'http' | 'tcp' | 'database' | 'custom';
endpoint: string;
method?: string;
expectedStatus?: number;
expectedContent?: string;
timeout: number; // seconds
interval: number; // seconds
retries: number;
lastCheck?: Date;
status: 'healthy' | 'unhealthy' | 'unknown';
}
export interface ComponentMetrics {
availability: number; // 0-1
responseTime: number; // ms
errorRate: number; // 0-1
throughput: number; // requests/second
lastUpdated: Date;
historicalData: MetricDataPoint[];
}
export interface MetricDataPoint {
timestamp: Date;
availability: number;
responseTime: number;
errorRate: number;
throughput: number;
}
export interface PlanDependency {
id: string;
dependentPlan: string;
dependency: string;
type: 'hard' | 'soft';
description: string;
}
export interface RecoveryProcedure {
id: string;
name: string;
description: string;
phase: 'assessment' | 'notification' | 'recovery' | 'validation' | 'communication';
steps: ProcedureStep[];
estimatedDuration: number; // minutes
assignedTo: string[];
approvalRequired: boolean;
approvers: string[];
}
export interface EmergencyContact {
id: string;
name: string;
role: string;
primary: boolean;
phone: string;
email: string;
alternatePhone?: string;
alternateEmail?: string;
escalationLevel: number;
availability: ContactAvailability;
}
export interface ContactAvailability {
timezone: string;
workingHours: {
start: string; // HH:MM
end: string; // HH:MM
};
weekdays: number[]; // 0-6, Sunday = 0
emergency24x7: boolean;
}
export interface DisasterTrigger {
id: string;
name: string;
type: 'manual' | 'automatic' | 'external';
conditions: TriggerCondition[];
actions: TriggerAction[];
enabled: boolean;
lastTriggered?: Date;
}
export interface TriggerCondition {
id: string;
type: 'metric' | 'event' | 'health-check' | 'external-signal';
source: string;
operator: 'equals' | 'greater-than' | 'less-than' | 'contains' | 'matches';
threshold: any;
duration: number; // seconds
severity: 'low' | 'medium' | 'high' | 'critical';
}
export interface TriggerAction {
id: string;
type: 'notify' | 'execute-plan' | 'escalate' | 'log';
configuration: Record<string, any>;
delay: number; // seconds
}
export interface TestSchedule {
enabled: boolean;
frequency: string; // cron expression
type: 'full' | 'partial' | 'tabletop' | 'walkthrough';
scope: string[];
duration: number; // hours
participants: string[];
lastTest?: Date;
nextTest?: Date;
results: TestResult[];
}
export interface TestResult {
id: string;
date: Date;
type: string;
duration: number; // minutes
success: boolean;
findings: TestFinding[];
recommendations: string[];
participants: string[];
artifacts: string[];
}
export interface TestFinding {
id: string;
severity: 'low' | 'medium' | 'high' | 'critical';
category: 'procedure' | 'technology' | 'communication' | 'documentation';
description: string;
impact: string;
recommendation: string;
assignedTo?: string;
dueDate?: Date;
status: 'open' | 'in-progress' | 'resolved' | 'accepted-risk';
}
export interface ComplianceRequirement {
id: string;
framework: string; // SOX, HIPAA, PCI-DSS, etc.
requirement: string;
description: string;
evidence: string[];
lastAudit?: Date;
nextAudit?: Date;
status: 'compliant' | 'non-compliant' | 'under-review';
}
export interface PlanDocumentation {
overview: string;
scope: string;
assumptions: string[];
limitations: string[];
roles: RoleDefinition[];
communicationPlan: CommunicationPlan;
escalationMatrix: EscalationLevel[];
attachments: DocumentAttachment[];
}
export interface RoleDefinition {
role: string;
responsibilities: string[];
authority: string[];
skillsRequired: string[];
backupPersonnel: string[];
}
export interface CommunicationPlan {
channels: CommunicationChannel[];
templates: CommunicationTemplate[];
schedules: CommunicationSchedule[];
}
export interface CommunicationChannel {
id: string;
name: string;
type: 'email' | 'sms' | 'phone' | 'slack' | 'teams' | 'webhook';
priority: number;
configuration: Record<string, any>;
enabled: boolean;
}
export interface CommunicationTemplate {
id: string;
name: string;
type: 'initial-notification' | 'status-update' | 'resolution' | 'post-mortem';
subject: string;
body: string;
channels: string[];
recipients: string[];
}
export interface CommunicationSchedule {
phase: string;
frequency: number; // minutes
recipients: string[];
channels: string[];
template: string;
}
export interface EscalationLevel {
level: number;
trigger: string;
timeframe: number; // minutes
contacts: string[];
actions: string[];
}
export interface DocumentAttachment {
id: string;
name: string;
type: string;
size: number;
url: string;
lastModified: Date;
}
export interface DisasterEvent {
id: string;
planId: string;
type: string;
severity: 'low' | 'medium' | 'high' | 'critical';
startTime: Date;
endTime?: Date;
duration?: number; // minutes
status: 'active' | 'resolved' | 'closed';
impactedComponents: string[];
recoveryProgress: RecoveryProgress;
timeline: EventTimeline[];
notifications: NotificationLog[];
decisions: DecisionLog[];
costs: CostEstimate;
}
export interface RecoveryProgress {
overallProgress: number; // 0-100
phases: PhaseProgress[];
components: ComponentProgress[];
estimatedCompletion?: Date;
actualRTO?: number; // minutes
actualRPO?: number; // minutes
}
export interface PhaseProgress {
phase: string;
status: 'pending' | 'in-progress' | 'completed' | 'failed';
progress: number; // 0-100
startTime?: Date;
endTime?: Date;
assignedTo: string[];
}
export interface ComponentProgress {
componentId: string;
status: 'pending' | 'recovering' | 'recovered' | 'failed';
progress: number; // 0-100
currentStrategy?: string;
startTime?: Date;
endTime?: Date;
issues: string[];
}
export interface EventTimeline {
id: string;
timestamp: Date;
type: 'detection' | 'notification' | 'decision' | 'action' | 'milestone' | 'resolution';
description: string;
source: string;
severity?: string;
metadata?: Record<string, any>;
}
export interface NotificationLog {
id: string;
timestamp: Date;
type: string;
recipients: string[];
channels: string[];
template: string;
success: boolean;
error?: string;
}
export interface DecisionLog {
id: string;
timestamp: Date;
decision: string;
rationale: string;
alternatives: string[];
decisionMaker: string;
approvers: string[];
impact: string;
reversible: boolean;
}
export interface CostEstimate {
directCosts: {
recovery: number;
resources: number;
personnel: number;
external: number;
};
indirectCosts: {
businessImpact: number;
reputation: number;
opportunity: number;
};
totalEstimated: number;
actualCosts?: number;
currency: string;
}
export class DisasterRecoveryManager extends EventEmitter {
private plans = new Map<string, DisasterRecoveryPlan>();
private events = new Map<string, DisasterEvent>();
private monitoringInterval: NodeJS.Timeout | null = null;
private testScheduler: NodeJS.Timeout | null = null;
private activeRecoveries = new Set<string>();
constructor() {
super();
this.startMonitoring();
this.startTestScheduler();
}
createPlan(config: Omit<DisasterRecoveryPlan, 'id' | 'status' | 'created' | 'modified'>): string {
const plan: DisasterRecoveryPlan = {
id: crypto.randomUUID(),
status: 'draft',
created: new Date(),
modified: new Date(),
...config
};
this.plans.set(plan.id, plan);
this.emit('plan-created', plan);
return plan.id;
}
updatePlan(planId: string, updates: Partial<DisasterRecoveryPlan>): boolean {
const plan = this.plans.get(planId);
if (!plan) {
return false;
}
Object.assign(plan, updates);
plan.modified = new Date();
this.emit('plan-updated', plan);
return true;
}
activatePlan(planId: string): boolean {
const plan = this.plans.get(planId);
if (!plan) {
return false;
}
if (plan.status !== 'approved') {
throw new Error('Plan must be approved before activation');
}
plan.status = 'active';
plan.lastActivated = new Date();
plan.modified = new Date();
// Start monitoring triggers
this.startPlanMonitoring(plan);
this.emit('plan-activated', plan);
return true;
}
async executeRecovery(planId: string, triggerId?: string, manual: boolean = false): Promise<string> {
const plan = this.plans.get(planId);
if (!plan) {
throw new Error(`Disaster recovery plan not found: ${planId}`);
}
if (plan.status !== 'active' && !manual) {
throw new Error(`Plan is not active: ${planId}`);
}
const event: DisasterEvent = {
id: crypto.randomUUID(),
planId,
type: triggerId ? 'automatic' : 'manual',
severity: plan.criticality,
startTime: new Date(),
status: 'active',
impactedComponents: plan.components.map(c => c.id),
recoveryProgress: {
overallProgress: 0,
phases: plan.procedures.map(p => ({
phase: p.phase,
status: 'pending',
progress: 0,
assignedTo: p.assignedTo
})),
components: plan.components.map(c => ({
componentId: c.id,
status: 'pending',
progress: 0,
issues: []
}))
},
timeline: [{
id: crypto.randomUUID(),
timestamp: new Date(),
type: 'detection',
description: 'Disaster recovery initiated',
source: manual ? 'manual' : triggerId || 'unknown'
}],
notifications: [],
decisions: [],
costs: {
directCosts: { recovery: 0, resources: 0, personnel: 0, external: 0 },
indirectCosts: { businessImpact: 0, reputation: 0, opportunity: 0 },
totalEstimated: 0,
currency: 'USD'
}
};
this.events.set(event.id, event);
this.activeRecoveries.add(event.id);
this.emit('recovery-started', event);
try {
// Send initial notifications
await this.sendNotifications(plan, event, 'initial-notification');
// Execute recovery procedures
await this.executeRecoveryProcedures(plan, event);
event.status = 'resolved';
event.endTime = new Date();
event.duration = event.endTime.getTime() - event.startTime.getTime();
this.addTimelineEntry(event, 'resolution', 'Recovery completed successfully');
this.emit('recovery-completed', event);
} catch (error) {
event.status = 'active'; // Keep active for manual intervention
this.addTimelineEntry(event, 'action', `Recovery failed: ${(error as Error).message}`);
this.emit('recovery-failed', { event, error: (error as Error).message });
throw error;
} finally {
this.activeRecoveries.delete(event.id);
}
return event.id;
}
private async executeRecoveryProcedures(plan: DisasterRecoveryPlan, event: DisasterEvent): Promise<void> {
// Sort procedures by phase
const proceduresByPhase = new Map<string, RecoveryProcedure[]>();
for (const procedure of plan.procedures) {
if (!proceduresByPhase.has(procedure.phase)) {
proceduresByPhase.set(procedure.phase, []);
}
proceduresByPhase.get(procedure.phase)!.push(procedure);
}
const phases = ['assessment', 'notification', 'recovery', 'validation', 'communication'];
for (const phase of phases) {
const procedures = proceduresByPhase.get(phase) || [];
if (procedures.length === 0) continue;
const phaseProgress = event.recoveryProgress.phases.find(p => p.phase === phase)!;
phaseProgress.status = 'in-progress';
phaseProgress.startTime = new Date();
this.addTimelineEntry(event, 'milestone', `Starting ${phase} phase`);
try {
for (const procedure of procedures) {
await this.executeProcedure(procedure, plan, event);
}
phaseProgress.status = 'completed';
phaseProgress.progress = 100;
phaseProgress.endTime = new Date();
this.addTimelineEntry(event, 'milestone', `Completed ${phase} phase`);
} catch (error) {
phaseProgress.status = 'failed';
this.addTimelineEntry(event, 'action', `Failed ${phase} phase: ${(error as Error).message}`);
throw error;
}
}
// Update overall progress
const completedPhases = event.recoveryProgress.phases.filter(p => p.status === 'completed').length;
event.recoveryProgress.overallProgress = (completedPhases / event.recoveryProgress.phases.length) * 100;
}
private async executeProcedure(procedure: RecoveryProcedure, plan: DisasterRecoveryPlan, event: DisasterEvent): Promise<void> {
this.addTimelineEntry(event, 'action', `Executing procedure: ${procedure.name}`);
// Check if approval is required
if (procedure.approvalRequired) {
await this.requestApproval(procedure, plan, event);
}
// Execute steps in order
for (const step of procedure.steps.sort((a, b) => a.order - b.order)) {
await this.executeStep(step, procedure, plan, event);
}
}
private async requestApproval(procedure: RecoveryProcedure, plan: DisasterRecoveryPlan, event: DisasterEvent): Promise<void> {
this.addTimelineEntry(event, 'decision', `Requesting approval for procedure: ${procedure.name}`);
// In a real implementation, this would integrate with approval systems
// For now, we'll simulate approval
const decision: DecisionLog = {
id: crypto.randomUUID(),
timestamp: new Date(),
decision: `Approve execution of ${procedure.name}`,
rationale: 'Automated approval for disaster recovery',
alternatives: ['Manual intervention', 'Skip procedure'],
decisionMaker: 'system',
approvers: procedure.approvers,
impact: 'Enables recovery procedure execution',
reversible: false
};
event.decisions.push(decision);
}
private async executeStep(step: ProcedureStep, procedure: RecoveryProcedure, plan: DisasterRecoveryPlan, event: DisasterEvent): Promise<void> {
this.addTimelineEntry(event, 'action', `Executing step: ${step.name}`);
const startTime = Date.now();
let attempt = 0;
while (attempt <= step.retries) {
try {
switch (step.type) {
case 'script':
await this.executeScript(step);
break;
case 'command':
await this.executeCommand(step);
break;
case 'api-call':
await this.executeApiCall(step);
break;
case 'manual':
await this.executeManualStep(step, event);
break;
case 'approval':
await this.executeApprovalStep(step, event);
break;
}
// Step completed successfully
this.addTimelineEntry(event, 'action', `Step completed: ${step.name}`);
return;
} catch (error) {
attempt++;
if (attempt > step.retries) {
this.addTimelineEntry(event, 'action', `Step failed after ${step.retries} retries: ${step.name} - ${(error as Error).message}`);
throw error;
}
this.addTimelineEntry(event, 'action', `Step failed (attempt ${attempt}/${step.retries + 1}): ${step.name} - ${(error as Error).message}`);
// Wait before retry
await new Promise(resolve => setTimeout(resolve, 5000));
}
}
// Check timeout
const elapsed = Date.now() - startTime;
if (elapsed > step.timeout * 60 * 1000) {
throw new Error(`Step timeout exceeded: ${step.name}`);
}
}
private async executeScript(step: ProcedureStep): Promise<void> {
if (!step.script) {
throw new Error(`No script provided for step: ${step.name}`);
}
// In production, this would execute the actual script
this.emit('step-executed', { stepId: step.id, type: 'script' });
}
private async executeCommand(step: ProcedureStep): Promise<void> {
if (!step.command) {
throw new Error(`No command provided for step: ${step.name}`);
}
// In production, this would execute the actual command
this.emit('step-executed', { stepId: step.id, type: 'command' });
}
private async executeApiCall(step: ProcedureStep): Promise<void> {
if (!step.apiEndpoint) {
throw new Error(`No API endpoint provided for step: ${step.name}`);
}
try {
const response = await fetch(step.apiEndpoint, {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ step: step.name })
});
if (!response.ok) {
throw new Error(`API call failed: ${response.statusText}`);
}
this.emit('step-executed', { stepId: step.id, type: 'api-call' });
} catch (error) {
throw new Error(`API call failed for step ${step.name}: ${(error as Error).message}`);
}
}
private async executeManualStep(step: ProcedureStep, event: DisasterEvent): Promise<void> {
// Manual step requires human intervention
this.addTimelineEntry(event, 'action', `Manual intervention required: ${step.description}`);
// In production, this would notify operators and wait for confirmation
this.emit('manual-step-required', { step, event });
// Simulate manual completion
await new Promise(resolve => setTimeout(resolve, 2000));
}
private async executeApprovalStep(step: ProcedureStep, event: DisasterEvent): Promise<void> {
if (!step.approvers || step.approvers.length === 0) {
throw new Error(`No approvers specified for approval step: ${step.name}`);
}
this.addTimelineEntry(event, 'decision', `Approval required from: ${step.approvers.join(', ')}`);
// In production, this would integrate with approval workflow systems
this.emit('approval-required', { step, event });
// Simulate approval
await new Promise(resolve => setTimeout(resolve, 1000));
}
private async sendNotifications(plan: DisasterRecoveryPlan, event: DisasterEvent, templateType: string): Promise<void> {
const template = plan.documentation.communicationPlan.templates.find(t => t.type === templateType);
if (!template) {
return;
}
for (const channelId of template.channels) {
const channel = plan.documentation.communicationPlan.channels.find(c => c.id === channelId);
if (!channel || !channel.enabled) {
continue;
}
try {
await this.sendNotification(channel, template, plan, event);
event.notifications.push({
id: crypto.randomUUID(),
timestamp: new Date(),
type: templateType,
recipients: template.recipients,
channels: [channel.name],
template: template.name,
success: true
});
} catch (error) {
event.notifications.push({
id: crypto.randomUUID(),
timestamp: new Date(),
type: templateType,
recipients: template.recipients,
channels: [channel.name],
template: template.name,
success: false,
error: (error as Error).message
});
}
}
}
private async sendNotification(
channel: CommunicationChannel,
template: CommunicationTemplate,
plan: DisasterRecoveryPlan,
event: DisasterEvent
): Promise<void> {
// Replace template variables
const subject = this.replaceTemplateVariables(template.subject, plan, event);
const body = this.replaceTemplateVariables(template.body, plan, event);
switch (channel.type) {
case 'email':
await this.sendEmail(channel, template.recipients, subject, body);
break;
case 'sms':
await this.sendSMS(channel, template.recipients, body);
break;
case 'slack':
await this.sendSlackMessage(channel, body);
break;
case 'webhook':
await this.sendWebhook(channel, { subject, body, event });
break;
}
}
private replaceTemplateVariables(text: string, plan: DisasterRecoveryPlan, event: DisasterEvent): string {
return text
.replace(/\{plan\.name\}/g, plan.name)
.replace(/\{event\.id\}/g, event.id)
.replace(/\{event\.severity\}/g, event.severity)
.replace(/\{event\.startTime\}/g, event.startTime.toISOString())
.replace(/\{event\.status\}/g, event.status);
}
private async sendEmail(channel: CommunicationChannel, recipients: string[], subject: string, body: string): Promise<void> {
// Email sending implementation
this.emit('notification-sent', { type: 'email', recipients, subject });
}
private async sendSMS(channel: CommunicationChannel, recipients: string[], message: string): Promise<void> {
// SMS sending implementation
this.emit('notification-sent', { type: 'sms', recipients, message });
}
private async sendSlackMessage(channel: CommunicationChannel, message: string): Promise<void> {
// Slack message sending implementation
this.emit('notification-sent', { type: 'slack', message });
}
private async sendWebhook(channel: CommunicationChannel, payload: any): Promise<void> {
// Webhook sending implementation
this.emit('notification-sent', { type: 'webhook', payload });
}
private addTimelineEntry(event: DisasterEvent, type: EventTimeline['type'], description: string): void {
event.timeline.push({
id: crypto.randomUUID(),
timestamp: new Date(),
type,
description,
source: 'disaster-recovery-manager'
});
}
private startMonitoring(): void {
this.monitoringInterval = setInterval(async () => {
await this.monitorTriggers();
await this.updateComponentMetrics();
}, 30000); // Every 30 seconds
}
private async monitorTriggers(): Promise<void> {
for (const plan of this.plans.values()) {
if (plan.status !== 'active') {
continue;
}
for (const trigger of plan.triggers) {
if (!trigger.enabled) {
continue;
}
try {
const shouldTrigger = await this.evaluateTrigger(trigger);
if (shouldTrigger) {
this.emit('trigger-activated', { planId: plan.id, triggerId: trigger.id });
// Execute trigger actions
for (const action of trigger.actions) {
await this.executeTriggerAction(action, plan, trigger);
}
trigger.lastTriggered = new Date();
}
} catch (error) {
this.emit('trigger-error', {
planId: plan.id,
triggerId: trigger.id,
error: (error as Error).message
});
}
}
}
}
private async evaluateTrigger(trigger: DisasterTrigger): Promise<boolean> {
let conditionsMet = 0;
for (const condition of trigger.conditions) {
if (await this.evaluateTriggerCondition(condition)) {
conditionsMet++;
}
}
// All conditions must be met
return conditionsMet === trigger.conditions.length;
}
private async evaluateTriggerCondition(condition: TriggerCondition): Promise<boolean> {
switch (condition.type) {
case 'metric':
return this.evaluateMetricCondition(condition);
case 'health-check':
return this.evaluateHealthCheckCondition(condition);
case 'event':
return this.evaluateEventCondition(condition);
case 'external-signal':
return this.evaluateExternalSignalCondition(condition);
default:
return false;
}
}
private evaluateMetricCondition(condition: TriggerCondition): boolean {
// Metric evaluation implementation
return false;
}
private evaluateHealthCheckCondition(condition: TriggerCondition): boolean {
// Health check evaluation implementation
return false;
}
private evaluateEventCondition(condition: TriggerCondition): boolean {
// Event evaluation implementation
return false;
}
private evaluateExternalSignalCondition(condition: TriggerCondition): boolean {
// External signal evaluation implementation
return false;
}
private async executeTriggerAction(action: TriggerAction, plan: DisasterRecoveryPlan, trigger: DisasterTrigger): Promise<void> {
setTimeout(async () => {
switch (action.type) {
case 'execute-plan':
await this.executeRecovery(plan.id, trigger.id);
break;
case 'notify':
await this.sendTriggerNotification(action, plan, trigger);
break;
case 'escalate':
await this.escalateTrigger(action, plan, trigger);
break;
case 'log':
this.logTriggerEvent(action, plan, trigger);
break;
}
}, action.delay * 1000);
}
private async sendTriggerNotification(action: TriggerAction, plan: DisasterRecoveryPlan, trigger: DisasterTrigger): Promise<void> {
// Send trigger notification
this.emit('trigger-notification', { planId: plan.id, triggerId: trigger.id, action });
}
private async escalateTrigger(action: TriggerAction, plan: DisasterRecoveryPlan, trigger: DisasterTrigger): Promise<void> {
// Escalate trigger
this.emit('trigger-escalated', { planId: plan.id, triggerId: trigger.id, action });
}
private logTriggerEvent(action: TriggerAction, plan: DisasterRecoveryPlan, trigger: DisasterTrigger): void {
// Log trigger event
this.emit('trigger-logged', { planId: plan.id, triggerId: trigger.id, action });
}
private async updateComponentMetrics(): Promise<void> {
for (const plan of this.plans.values()) {
for (const component of plan.components) {
try {
await this.updateComponentHealth(component);
} catch (error) {
// Handle component health update errors
}
}
}
}
private async updateComponentHealth(component: RecoveryComponent): Promise<void> {
for (const healthCheck of component.healthChecks) {
try {
const isHealthy = await this.performHealthCheck(healthCheck);
healthCheck.status = isHealthy ? 'healthy' : 'unhealthy';
healthCheck.lastCheck = new Date();
// Update component status based on health checks
const allHealthy = component.healthChecks.every(hc => hc.status === 'healthy');
if (component.status === 'operational' && !allHealthy) {
component.status = 'degraded';
} else if (component.status === 'degraded' && allHealthy) {
component.status = 'operational';
}
} catch (error) {
healthCheck.status = 'unknown';
}
}
}
private async performHealthCheck(healthCheck: HealthCheck): Promise<boolean> {
switch (healthCheck.type) {
case 'http':
return this.performHttpHealthCheck(healthCheck);
case 'tcp':
return this.performTcpHealthCheck(healthCheck);
case 'database':
return this.performDatabaseHealthCheck(healthCheck);
case 'custom':
return this.performCustomHealthCheck(healthCheck);
default:
return false;
}
}
private async performHttpHealthCheck(healthCheck: HealthCheck): Promise<boolean> {
try {
const controller = new AbortController();
const timeoutId = setTimeout(() => controller.abort(), healthCheck.timeout * 1000);
const response = await fetch(healthCheck.endpoint, {
method: healthCheck.method || 'GET',
signal: controller.signal
});
clearTimeout(timeoutId);
if (healthCheck.expectedStatus && response.status !== healthCheck.expectedStatus) {
return false;
}
if (healthCheck.expectedContent) {
const content = await response.text();
return content.includes(healthCheck.expectedContent);
}
return response.ok;
} catch (error) {
return false;
}
}
private async performTcpHealthCheck(healthCheck: HealthCheck): Promise<boolean> {
// TCP health check implementation
return true; // Simplified
}
private async performDatabaseHealthCheck(healthCheck: HealthCheck): Promise<boolean> {
// Database health check implementation
return true; // Simplified
}
private async performCustomHealthCheck(healthCheck: HealthCheck): Promise<boolean> {
// Custom health check implementation
return true; // Simplified
}
private startPlanMonitoring(plan: DisasterRecoveryPlan): void {
// Start monitoring for the specific plan
this.emit('plan-monitoring-started', { planId: plan.id });
}
private startTestScheduler(): void {
this.testScheduler = setInterval(async () => {
await this.checkScheduledTests();
}, 60000); // Check every minute
}
private async checkScheduledTests(): Promise<void> {
const now = new Date();
for (const plan of this.plans.values()) {
if (!plan.testSchedule.enabled || !plan.testSchedule.nextTest) {
continue;
}
if (plan.testSchedule.nextTest <= now) {
try {
await this.executeTest(plan);
} catch (error) {
this.emit('test-failed', {
planId: plan.id,
error: (error as Error).message
});
}
}
}
}
private async executeTest(plan: DisasterRecoveryPlan): Promise<void> {
const testResult: TestResult = {
id: crypto.randomUUID(),
date: new Date(),
type: plan.testSchedule.type,
duration: 0,
success: false,
findings: [],
recommendations: [],
participants: plan.testSchedule.participants,
artifacts: []
};
const startTime = Date.now();
try {
// Execute test based on type
switch (plan.testSchedule.type) {
case 'full':
await this.executeFullTest(plan, testResult);
break;
case 'partial':
await this.executePartialTest(plan, testResult);
break;
case 'tabletop':
await this.executeTabletopTest(plan, testResult);
break;
case 'walkthrough':
await this.executeWalkthroughTest(plan, testResult);
break;
}
testResult.success = true;
} catch (error) {
testResult.findings.push({
id: crypto.randomUUID(),
severity: 'high',
category: 'procedure',
description: `Test execution failed: ${(error as Error).message}`,
impact: 'Test could not be completed',
recommendation: 'Review test procedures and fix identified issues',
status: 'open'
});
}
testResult.duration = Math.floor((Date.now() - startTime) / 1000 / 60); // minutes
plan.testSchedule.results.push(testResult);
plan.testSchedule.lastTest = testResult.date;
// Schedule next test
this.scheduleNextTest(plan);
this.emit('test-completed', {
planId: plan.id,
testResult
});
}
private async executeFullTest(plan: DisasterRecoveryPlan, testResult: TestResult): Promise<void> {
// Full disaster recovery test
this.emit('test-started', { planId: plan.id, type: 'full' });
}
private async executePartialTest(plan: DisasterRecoveryPlan, testResult: TestResult): Promise<void> {
// Partial disaster recovery test
this.emit('test-started', { planId: plan.id, type: 'partial' });
}
private async executeTabletopTest(plan: DisasterRecoveryPlan, testResult: TestResult): Promise<void> {
// Tabletop exercise
this.emit('test-started', { planId: plan.id, type: 'tabletop' });
}
private async executeWalkthroughTest(plan: DisasterRecoveryPlan, testResult: TestResult): Promise<void> {
// Walkthrough test
this.emit('test-started', { planId: plan.id, type: 'walkthrough' });
}
private scheduleNextTest(plan: DisasterRecoveryPlan): void {
// Calculate next test date based on cron expression
// Simplified - would use proper cron library
const now = new Date();
plan.testSchedule.nextTest = new Date(now.getTime() + 30 * 24 * 60 * 60 * 1000); // 30 days
}
// Public API methods
getPlans(): DisasterRecoveryPlan[] {
return Array.from(this.plans.values());
}
getPlan(planId: string): DisasterRecoveryPlan | null {
return this.plans.get(planId) || null;
}
getEvents(): DisasterEvent[] {
return Array.from(this.events.values());
}
getEvent(eventId: string): DisasterEvent | null {
return this.events.get(eventId) || null;
}
getActiveRecoveries(): DisasterEvent[] {
return Array.from(this.activeRecoveries)
.map(id => this.events.get(id)!)
.filter(Boolean);
}
getStats(): any {
const plans = Array.from(this.plans.values());
const events = Array.from(this.events.values());
return {
plans: {
total: plans.length,
active: plans.filter(p => p.status === 'active').length,
approved: plans.filter(p => p.status === 'approved').length,
draft: plans.filter(p => p.status === 'draft').length
},
events: {
total: events.length,
active: events.filter(e => e.status === 'active').length,
resolved: events.filter(e => e.status === 'resolved').length
},
activeRecoveries: this.activeRecoveries.size,
components: plans.reduce((sum, p) => sum + p.components.length, 0),
tests: plans.reduce((sum, p) => sum + p.testSchedule.results.length, 0)
};
}
destroy(): void {
if (this.monitoringInterval) {
clearInterval(this.monitoringInterval);
}
if (this.testScheduler) {
clearInterval(this.testScheduler);
}
this.plans.clear();
this.events.clear();
this.activeRecoveries.clear();
this.removeAllListeners();
}
}