# [Feature Name] Deployment Procedure

## Document Metadata

| Field | Value |
|-------|-------|
| **Document Type** | Deployment Procedure (DEPLOY) |
| **Document ID** | `deploy-[project]-[nnn]-[feature-name]` |
| **Status** | Draft |
| **Version** | 1.0.0 |
| **Author** | [Author Name] |
| **Approver** | [Deployment Lead/DevOps Lead] |
| **Related Specs** | [Links to PRD, Technical Design, etc.] |

---

## Overview

### Purpose
<!-- Brief description of what this deployment accomplishes -->

### Scope
<!-- What systems/services are affected by this deployment -->


### Risk Level
<!-- Select one: Low / Medium / High -->
**Risk Level:** [Low/Medium/High]

**Risk Factors:**
- <!-- Key risk 1 -->
- <!-- Key risk 2 -->

---

## Prerequisites

### Required Access
- [ ] Production deployment credentials
- [ ] Database access (if applicable)
- [ ] Cloud provider console access
- [ ] Monitoring dashboard access
- [ ] Communication channels (Slack, PagerDuty, etc.)

### Required Approvals
- [ ] Code review completed
- [ ] Security review (if applicable)
- [ ] Deployment lead approval
- [ ] Stakeholder sign-off

### Environment Readiness
- [ ] Staging deployment successful
- [ ] All tests passing in CI/CD
- [ ] Database migrations tested
- [ ] Rollback plan validated
- [ ] Monitoring/alerts configured

### Dependencies
<!-- List any external dependencies or coordinated deployments -->
- <!-- Dependency 1 -->
- <!-- Dependency 2 -->

---

## Pre-Deployment Checklist

### Code & Build
- [ ] All PRs merged to deployment branch
- [ ] Build artifacts created and verified
- [ ] Version tags applied correctly
- [ ] Release notes prepared

### Infrastructure
- [ ] Resource capacity verified (CPU, memory, disk)
- [ ] Scaling policies reviewed
- [ ] Rate limits and quotas checked
- [ ] SSL certificates valid

### Database
- [ ] Migrations tested in staging
- [ ] Migration rollback tested
- [ ] Database backups verified
- [ ] Query performance validated

### Monitoring & Observability
- [ ] Health check endpoints verified
- [ ] Key metrics dashboard ready
- [ ] Alert rules configured
- [ ] Log aggregation working

### Communication
- [ ] Deployment window scheduled and communicated
- [ ] On-call team notified
- [ ] Stakeholders informed
- [ ] Status page updated (if applicable)

### Rollback Readiness
- [ ] Previous version artifacts available
- [ ] Rollback procedure documented
- [ ] Database rollback scripts ready
- [ ] Rollback decision criteria defined

---

## Deployment Steps

### Phase 1: Pre-Deployment Setup

#### Step 1.1: Environment Preparation
```bash
# Verify current system state
# TODO: Add commands to check current deployment version

# Backup current configuration
# TODO: Add backup commands
```

**Verification:**
- [ ] Current version identified
- [ ] Backups completed successfully

#### Step 1.2: Enable Maintenance Mode (if applicable)
```bash
# TODO: Add commands to enable maintenance mode
```

**Verification:**
- [ ] Maintenance page visible
- [ ] Traffic routing confirmed

---

### Phase 2: Deployment Execution

#### Step 2.1: Database Migration (if applicable)
```bash
# Run database migrations
# TODO: Add migration commands
```

**Verification:**
- [ ] Migrations completed without errors
- [ ] Schema changes applied correctly
- [ ] Data integrity verified

#### Step 2.2: Application Deployment
```bash
# Deploy new application version
# TODO: Add deployment commands (e.g., kubectl apply, docker deploy, etc.)
```

**Verification:**
- [ ] New version deployed
- [ ] Pods/instances healthy
- [ ] No deployment errors

#### Step 2.3: Configuration Updates
```bash
# Update configuration/environment variables
# TODO: Add configuration update commands
```

**Verification:**
- [ ] Configuration changes applied
- [ ] Services reloaded/restarted

#### Step 2.4: Service Restart/Reload
```bash
# Restart affected services
# TODO: Add restart commands
```

**Verification:**
- [ ] All services running
- [ ] Health checks passing

---

### Phase 3: Post-Deployment Verification

#### Step 3.1: Health Checks
```bash
# Verify service health
# TODO: Add health check commands
```

**Verification:**
- [ ] All health endpoints returning 200
- [ ] No error logs in past 5 minutes
- [ ] All instances/pods ready

#### Step 3.2: Functional Testing
<!-- Key functionality to verify manually or via smoke tests -->
- [ ] **Test Case 1:** [Description] - Expected: [result]
- [ ] **Test Case 2:** [Description] - Expected: [result]
- [ ] **Test Case 3:** [Description] - Expected: [result]

#### Step 3.3: Monitoring Verification
**Key Metrics to Monitor:**
- [ ] Response time: [threshold]
- [ ] Error rate: [threshold]
- [ ] Throughput: [threshold]
- [ ] Resource utilization: [threshold]

```bash
# Check key metrics
# TODO: Add commands to query metrics
```

#### Step 3.4: Disable Maintenance Mode
```bash
# TODO: Add commands to disable maintenance mode
```

**Verification:**
- [ ] Normal traffic restored
- [ ] Users can access application

---

## Rollback Plan

### Rollback Decision Criteria
Initiate rollback if any of the following occur:
- Error rate exceeds [threshold]% for more than [duration] minutes
- Critical functionality broken (specifically: [list critical features])
- Performance degradation > [threshold]% from baseline
- Database corruption or data loss detected
- [Other critical failure condition]

### Rollback Procedure

#### Step R.1: Initiate Rollback
```bash
# Stop new deployment
# TODO: Add commands to halt deployment
```

#### Step R.2: Revert Application
```bash
# Deploy previous version
# TODO: Add rollback deployment commands
```

**Verification:**
- [ ] Previous version deployed
- [ ] Services healthy

#### Step R.3: Revert Database (if needed)
```bash
# Rollback database migrations
# TODO: Add migration rollback commands
```

**Verification:**
- [ ] Database schema reverted
- [ ] Data integrity verified

#### Step R.4: Revert Configuration
```bash
# Restore previous configuration
# TODO: Add configuration restore commands
```

**Verification:**
- [ ] Configuration restored
- [ ] Services using correct config

#### Step R.5: Verify Rollback
- [ ] System functionality restored
- [ ] Error rates normalized
- [ ] No data loss
- [ ] Users can access application

### Post-Rollback Actions
- [ ] Notify stakeholders of rollback
- [ ] Document rollback reason
- [ ] Schedule post-mortem
- [ ] Update deployment status

---

## Verification

### Success Criteria
<!-- Define what "successful deployment" means -->
- [ ] All services healthy for [duration] minutes
- [ ] Error rate < [threshold]%
- [ ] Response time within [threshold]ms
- [ ] No critical errors in logs
- [ ] All functional tests passing
- [ ] User traffic processing normally

### Post-Deployment Monitoring Focus

**Monitor for:**
- Application errors and exceptions
- Performance metrics (latency, throughput)
- Resource utilization
- User-reported issues
- Business metrics (if applicable)

### Sign-off

| Role | Name | Signature |
|------|------|-----------|
| Deployment Lead | | |
| Technical Lead | | |
| Operations | | |

---

## Appendix

### Environment Details
| Environment | URL/Endpoint | Version |
|-------------|--------------|---------|
| Production | | |
| Staging | | |

### Key Contacts
| Role | Name | Contact |
|------|------|---------|
| Deployment Lead | | |
| On-Call Engineer | | |
| Technical Lead | | |
| DevOps Lead | | |

### Important Commands Reference
```bash
# Check deployment status
# TODO: Add status check commands

# View logs
# TODO: Add log viewing commands

# Check metrics
# TODO: Add metrics commands

# Emergency rollback (one-liner)
# TODO: Add emergency rollback command
```

### Notes
<!-- Additional notes, special considerations, or lessons learned -->