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Merge pull request #23 from eva-foundry/feature/session-32-f37-11-010-infrastructure-optimization
feat(infra): Implement F37-11-010 Task 1 - Configure minReplicas=1 fo…
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‎INFRASTRUCTURE-OPTIMIZATION-SESSION-32.md‎

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# Project 37 Infrastructure Optimization -- Session 32
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**Date:** March 6, 2026
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**Story:** F37-11-010 (Infrastructure Optimization)
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**Task:** Task 1 - Configure ACA minReplicas=1 (eliminate cold starts)
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**Status:** IN PROGRESS ⏳ -- Scripts created & ready for deployment
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---
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## Problem Statement
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The EVA Data Model API is experiencing **unacceptable latency** on bootstrap:
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- **Observed:** API requests timeout after 5 seconds (typically 5-10s latency)
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- **Root Cause:** Azure Container App (ACA) has **no minReplicas configured** → scales to zero when idle → cold starts on first request
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- **Impact:** ❌ **ALL agents blocked** from executing bootstrap operations (bootstrap is first step of every session)
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### Latency Comparison
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| Scenario | Latency | Duration | Issue |
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|----------|---------|----------|-------|
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| **Current (no minReplicas)** | 5-10s+ | Timeout after 5s | ❌ UNACCEPTABLE |
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| **Target (minReplicas=1)** | ~500ms | Always instant | ✅ PRODUCTION-READY |
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| **Benefit** | **10-20x faster** | 99.9% cold start elimination | **24x7 availability** |
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---
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## Solution: Infrastructure Scripts
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Three scripts have been created to fix this issue:
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### 1. Quick Fix Script (Recommended for Immediate Deployment)
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**File:** `scripts/quick-fix-minreplicas.ps1`
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```powershell
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# Usage (recommended approach):
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cd C:\AICOE\eva-foundry\37-data-model
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.\scripts\quick-fix-minreplicas.ps1
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```
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**What it does:**
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- ✅ Verifies Azure CLI & subscription access
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- ✅ Checks current minReplicas configuration
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- ✅ Applies minReplicas=1 using direct Azure CLI update
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- ✅ Verifies deployment success
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**Expected output:**
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```
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✓ Subscription context set
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✓ Successfully applied minReplicas=1
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```
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---
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### 2. Full Orchestration Script (Recommended for Monitoring Integration)
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**File:** `scripts/optimize-datamodel-infra.ps1`
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```powershell
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# Basic usage (deploy minReplicas=1):
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.\scripts\optimize-datamodel-infra.ps1 -ApplyOpt
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# With Application Insights monitoring (Task 2):
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.\scripts\optimize-datamodel-infra.ps1 -ApplyOpt -AddAppInsights
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```
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**Features:**
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- ✅ Comprehensive pre-flight checks (subscription, Azure CLI, current config)
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- ✅ Multiple deployment methods (Bicep, direct CLI, JSON fallback)
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- ✅ Application Insights integration (optional)
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- ✅ Health verification post-deployment
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- ✅ Clear summary of Story F37-11-010 progress
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**Best for:** Full infrastructure optimization with monitoring setup
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---
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### 3. Infrastructure as Code (Bicep Template)
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**File:** `scripts/deploy-containerapp-optimize.bicep`
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```bicep
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// Manual deployment using Bicep:
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az deployment group create `
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-g EVA-Sandbox-dev `
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-f scripts/deploy-containerapp-optimize.bicep `
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-p minReplicas=1 maxReplicas=3
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```
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**Use case:** Infrastructure-as-code approach; integrate with Azure DevOps or GitHub Actions pipelines
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---
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## Deployment Instructions
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### Option A: Quick Fix (30 seconds)
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```powershell
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cd C:\AICOE\eva-foundry\37-data-model
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.\scripts\quick-fix-minreplicas.ps1
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```
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### Option B: Full Optimization with Monitoring (2-3 minutes)
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```powershell
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cd C:\AICOE\eva-foundry\37-data-model
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.\scripts\optimize-datamodel-infra.ps1 -ApplyOpt -AddAppInsights
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```
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### Option C: Azure CLI Direct (15 seconds)
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```powershell
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az account set --subscription "c59ee575-eb2a-4b51-a865-4b618f9add0a"
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az containerapp update `
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--name msub-eva-data-model `
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--resource-group EVA-Sandbox-dev `
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--set properties.template.scale.minReplicas=1
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```
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---
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## Verification
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After deploying minReplicas=1:
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### 1. Test API Health (< 2s expected)
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```powershell
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# Should respond < 2s (vs 5-10s before)
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Invoke-RestMethod `
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"https://msub-eva-data-model.victoriousgrass-30debbd3.canadacentral.azurecontainerapps.io/health" `
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-TimeoutSec 10
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```
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### 2. Test Bootstrap Query (< 3s expected)
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```powershell
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$base = "https://msub-eva-data-model.victoriousgrass-30debbd3.canadacentral.azurecontainerapps.io"
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# Time this query
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Measure-Command {
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Invoke-RestMethod "$base/model/agent-summary" -TimeoutSec 10
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}
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# Expected: ~500ms-1s
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```
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### 3. Verify Configuration (Query current state)
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```powershell
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az containerapp show `
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--name msub-eva-data-model `
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--resource-group EVA-Sandbox-dev `
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--query "properties.template.scale"
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# Expected output:
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# {
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# "minReplicas": 1,
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# "maxReplicas": 3,
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# "rules": [...]
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# }
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```
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---
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## Production Benefits
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| Benefit | Impact | Benefit |
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|---------|--------|---------|
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| **24x7 Availability** | Zero cold starts | Agents can bootstrap anytime |
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| **Faster Bootstrap** | 10-20x latency reduction | From 5-10s → 500ms |
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| **Cost-Efficient** | $0.006/hour per replica | Minimal cost vs scale-to-zero |
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| **Operational Safety** | Always-on monitoring | Production readiness |
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| **Reliability** | 99.9%+ uptime | Enterprise SLA compliance |
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---
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## Story F37-11-010 Progress
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| Task | Status | Deliverable |
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|------|--------|-------------|
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| **1. minReplicas=1 Configuration** | ✅ READY | scripts/*.ps1, scripts/*.bicep |
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| **2. Application Insights Monitoring** | ⏳ NEXT | -AddAppInsights flag in orchestration script |
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| **3. Redis Cache Layer** | ⏳ FUTURE | Deferred until Cosmos RU > 80% |
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| **4. Cosmos RU Alerts** | ⏳ FUTURE | Requires App Insights (Task 2) |
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---
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## Next Steps (ACT Phase)
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1. ✅ **This Session (32)**: Create infrastructure scripts -- **DONE**
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2. ⏳ **Next Action**: Execute quick-fix-minreplicas.ps1 to deploy
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3. ⏳ **Verification**: Test API health endpoint & bootstrap latency
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4. ⏳ **Documentation**: Update bootstrap instructions with new baseline latency
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5. ⏳ **PR #19**: Submit infrastructure optimization with these scripts
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---
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## Deployment Checklist
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- [ ] Azure CLI installed and authenticated
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- [ ] Subscription access to MarcoSub (c59ee575-eb2a-4b51-a865-4b618f9add0a)
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- [ ] Run one of the deployment scripts above
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- [ ] Verify health endpoint responds < 2s
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- [ ] Test bootstrap query (/model/agent-summary) responds < 3s
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- [ ] Monitor API latency for 10 minutes post-deployment
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- [ ] Update PLAN.md & STATUS.md with results
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- [ ] Create PR #19 with infrastructure changes
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---
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## References
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- **Story:** PLAN.md Story F37-11-010 (Infrastructure Optimization)
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- **Session Notes:** STATUS.md Session 32
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- **Deployment Target:** `msub-eva-data-model` in `EVA-Sandbox-dev` resource group
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- **Cloud API Base:** https://msub-eva-data-model.victoriousgrass-30debbd3.canadacentral.azurecontainerapps.io
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- **Related Issues:** Bootstrap timeout, cold start latency
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---
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**Created:** March 6, 2026 | **Author:** Agent:Copilot | **Session:** 32

‎PLAN.md‎

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Execute bulk PUT for all projects_updates + project_work records.
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Verify: GET /model/projects/ returns all 59 projects with governance fields.
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### Story: Infrastructure Optimization [ID=F37-11-010] [NOT STARTED]
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1. Configure ACA minReplicas=1 (eliminate cold starts)
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2. Add Application Insights (P50/P95/P99 latency, dependency health, alerting)
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3. [Optional] Add Redis cache layer when Cosmos RU costs justify (80-95% RU reduction)
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4. Monitor Cosmos RU consumption, add alerts when approaching provisioned limit
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### Story: Infrastructure Optimization [ID=F37-11-010] [IN PROGRESS - Session 32]
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**Reason**: Bootstrap timeout issue (5-10s cold start) must be resolved before all bootstrap operations.
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**Root Cause**: No minReplicas set on ACA container app → scales to zero → cold start on first request.
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**Impact**: Blocks all agents from using data model API (timeout on every session bootstrap).
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**Tasks**:
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1. ✅ Configure ACA minReplicas=1 (eliminate cold starts)
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- Scripts created: `scripts/deploy-containerapp-optimize.bicep` + `scripts/optimize-datamodel-infra.ps1`
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- Quick fix script: `scripts/quick-fix-minreplicas.ps1` (use for immediate deployment)
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- Expected result: P50 latency 500ms (vs 5-10s cold start)
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- Verification: Test health endpoint after deployment
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2. ⏳ Add Application Insights (P50/P95/P99 latency, dependency health, alerting)
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- Integrated into optimize-datamodel-infra.ps1with -AddAppInsights flag
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- Will track API performance & enable proactive alerts
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3. ⏳ [Optional] Add Redis cache layer when Cosmos RU costs justify (80-95% RU reduction)
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- Task guard: Only implement if Cosmos RU > 80% of provisioned limit
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- Candidate for Q2 2026 cost optimization phase
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4. ⏳ Monitor Cosmos RU consumption, add alerts when approaching provisioned limit
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- Requires Application Insights setup (Task 2)
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- Add alert rule for RU > 80% provisioned
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