From 68fc65e685c1d8df142d3a2dca3abdb9ab41283d Mon Sep 17 00:00:00 2001 From: "Hermes (Jarvis)" Date: Fri, 17 Jul 2026 10:11:45 +0000 Subject: [PATCH] feat(dpvp): add backup-solution architecture notes from 2026-07-17 thread review - New file: workstreams/backup-solution.md - DLM explanation: what it is, how it works, vs AWS Backup - EC2/compute backup Q&A: AMI vs EBS snapshot, stateful vs stateless matrix - Document gaps checklist (rename, DLM policy spec, golden AMI strategy, etc.) - Updated vssa-dpvp.md: note linking to backup-solution.md - Updated README.md: added backup-solution to workstreams index --- README.md | 1 + workstreams/backup-solution.md | 102 +++++++++++++++++++++++++++++++++ workstreams/vssa-dpvp.md | 1 + 3 files changed, 104 insertions(+) create mode 100644 workstreams/backup-solution.md diff --git a/README.md b/README.md index 9d15384..62622be 100644 --- a/README.md +++ b/README.md @@ -8,6 +8,7 @@ | # | Workstream | File | |---|-----------|------| | 🔵 | VSSA — Digital Platform Value Proposition | [workstreams/vssa-dpvp.md](workstreams/vssa-dpvp.md) | +| 🔵 | AWS Backup Solution (DPVP) | [workstreams/backup-solution.md](workstreams/backup-solution.md) | | 🟡 | VSSA — Enterprise Architect Consultancy | [workstreams/vssa-enterprise-architect.md](workstreams/vssa-enterprise-architect.md) | | 🟢 | Cognitive Architect | [workstreams/cognitive-architect.md](workstreams/cognitive-architect.md) | | 🟣 | SAP Delivery Powered By AI | [workstreams/sap-delivery.md](workstreams/sap-delivery.md) | diff --git a/workstreams/backup-solution.md b/workstreams/backup-solution.md new file mode 100644 index 0000000..682ca25 --- /dev/null +++ b/workstreams/backup-solution.md @@ -0,0 +1,102 @@ +# AWS Backup Solution — Architecture Notes + +> **Workstream:** VSSA — DPVP +> **Source:** Thread `#vssa-dpvp-storm` (2026-07-17) — Lego review + Q&A +> **Status:** 🔵 In progress — questions answered, doc gaps identified +> **Last updated:** 2026-07-17 + +--- + +## Document Rename + +`aws backup-solutions` (plural) → **`backup-solution`** (singular) + +--- + +## Q&A — Key Learnings from Thread Review + +### 1. What is AWS DLM and how does it work? + +**AWS Data Lifecycle Manager (DLM)** is a native AWS service that **automates creation, retention, and deletion of EBS snapshots and AMIs**. No Lambda, no cron jobs — it's built into AWS. + +#### Flow + +``` +EC2 / EBS Volume + │ + ▼ + DLM Policy ──► Tag-based targeting (e.g. tag: backup=true) + │ + ▼ + Schedule ──► Snapshot/AMI on cron (hourly / daily / weekly) + │ + ▼ + Retention ──► Count-based (keep last N) or age-based (keep X days) + │ + ▼ + Cross-Region Copy (optional) ──► DR region replication + │ + ▼ + Cross-Account Copy (optional) ──► Isolated backup account +``` + +#### DLM vs AWS Backup + +| | DLM | AWS Backup | +|---|---|---| +| Scope | EBS + AMIs only | Multi-service (RDS, EFS, EKS, DynamoDB, FSx, EC2…) | +| Complexity | Simple, low-level | Central console, Vault Lock, compliance policies | +| Best for | Fine-grained EBS snapshot control | Enterprise-wide unified backup strategy | +| Coexistence | ✅ — run alongside each other | + +> **Recommendation:** Use DLM for granular EBS/AMI control + AWS Backup for everything else. + +--- + +### 2. Can compute resources (EC2) be backed up? + +**Yes.** Two approaches: + +#### A — AMI (Full Instance Backup) +Captures the entire EC2 instance: OS, software, config, and all attached EBS volumes. + +- Automate with: **DLM** (AMI schedule) or **AWS Backup** (EC2 resource type) +- Supports cross-region copy for DR + +#### B — EBS Snapshots (Volume-level) +For data volumes only — faster and cheaper than full AMIs. + +- Automate with: **DLM** snapshot policies or **AWS Backup** + +#### Compute Backup Decision Matrix + +| Resource | Backup Mechanism | RPO | Notes | +|---|---|---|---| +| EC2 — stateful | AMI via DLM or AWS Backup | 1h–24h | Schedule determines RPO | +| EBS data volumes | EBS snapshot | 1h–24h | Faster/cheaper than full AMI | +| EC2 — stateless (app tier) | ⚠️ Skip — redeploy from golden AMI/IaC | Minutes | Backing up stateless = wasted cost | +| Auto Scaling Groups | Launch template + IaC | Minutes (redeploy) | No snapshot needed | +| EC2 user data / config | CloudFormation / Terraform | N/A | IaC is the backup | + +> **Key design principle:** Stateless/immutable EC2 = redeploy from golden AMI or IaC. Only stateful EC2 needs AMI backup. This is a major cost driver. + +--- + +## Gaps to Address in the Solution Document + +Identified during the thread review on 2026-07-17: + +- [ ] **Rename** document from `aws backup-solutions` → `backup-solution` +- [ ] **DLM policy spec** — which EC2/EBS resources are stateful and DLM-targeted +- [ ] **AMI vs EBS snapshot decision matrix** — per workload type (table above is a starting point) +- [ ] **Stateful vs stateless EC2 classification** — explicit list of instances by tier +- [ ] **Compute rows in RPO/RTO table** — ensure EC2/EBS are alongside RDS, EFS, DynamoDB, EKS PVs +- [ ] **Golden AMI strategy** — how base AMIs are built, versioned, and rotated for stateless tiers +- [ ] **Cross-region AMI copy** — DR coverage for stateful EC2 workloads + +--- + +## Related + +- DPVP workstream: [vssa-dpvp.md](vssa-dpvp.md) +- Thread: `#vssa-dpvp-storm`, Discord guild `1518726359512387766`, thread `1527604713074458745` diff --git a/workstreams/vssa-dpvp.md b/workstreams/vssa-dpvp.md index e90133f..1973eda 100644 --- a/workstreams/vssa-dpvp.md +++ b/workstreams/vssa-dpvp.md @@ -27,3 +27,4 @@ ## Notes - Julius Sulcas was on time off — follow up when back +- AWS Backup Solution doc under review — see [backup-solution.md](backup-solution.md) for architecture notes, DLM/compute Q&A, and doc gaps (2026-07-17)