171 lines
6.3 KiB
Markdown
171 lines
6.3 KiB
Markdown
**Drop 5 – Governance at the Edge: Security, Compliance, Resilience (without 2 AM panics)**
|
||
*Series: “Edge Renaissance—putting compute (and the customer) back where they belong.”*
|
||
|
||
---
|
||
|
||
### ☕ Executive espresso (60‑second read)
|
||
|
||
* **500 closets ≠ 500 snowflakes.** Treat every store like a tiny cloud region: immutable builds, GitOps, and automated patch waves.
|
||
* **Keep sensitive stuff local, prove it centrally.** Shrink PCI/GDPR scope by processing and storing data in‑store, exporting only the minimum.
|
||
* **Assume nodes fail, links drop, auditors knock.** Backups, cert rotation, zero‑trust tunnels, and health probes are table stakes—so script them.
|
||
|
||
> **Bottom line:** Governance isn’t a tax on innovation—it’s the enabler that lets you scale edge wins without waking ops at 2 AM or failing your next audit.
|
||
|
||
---
|
||
|
||
## 1️⃣ The four pillars of edge governance
|
||
|
||
| Pillar | Goal | Core patterns |
|
||
| -------------- | ----------------------------------- | ------------------------------------------- |
|
||
| **Security** | Only trusted code & people touch it | Zero‑trust mesh, signed images, Vault |
|
||
| **Compliance** | Prove control, minimize scope | Data locality, audit trails, policy‑as‑code |
|
||
| **Resilience** | Survive node/WAN failures | Ceph replicas, PBS backups, runbooks |
|
||
| **Operations** | Ship, patch, observe at scale | GitOps, canary waves, fleet telemetry |
|
||
|
||
---
|
||
|
||
## 2️⃣ “Central brain, local autonomy” architecture
|
||
|
||
```
|
||
Git (single source of truth) ───► CI/CD (build, sign, scan)
|
||
│
|
||
▼
|
||
Artifact registry (images, configs)
|
||
│
|
||
┌──────────────┴──────────────┐
|
||
▼ ▼
|
||
Store Cluster A Store Cluster B ... (×500)
|
||
(pulls signed bundle) (pulls signed bundle)
|
||
```
|
||
|
||
* **Push nothing, let sites pull.** Firewalls stay tight; stores fetch on schedule over WireGuard.
|
||
* **Everything is versioned.** Configs, edge functions, models, Ceph rules—Git is law.
|
||
|
||
---
|
||
|
||
## 3️⃣ Security: zero‑trust by default
|
||
|
||
```
|
||
🔐 Identity & Access
|
||
• Short‑lived certs for nodes (ACME) and humans (SSO + MFA)
|
||
• RBAC in Proxmox; no shared “root” logins
|
||
|
||
🧩 Code & Images
|
||
• SBOM for every container/VM
|
||
• Sign with Cosign; verify before deploy
|
||
|
||
🕳 Network
|
||
• WireGuard/VPN mesh, least‑privilege ACLs
|
||
• Local firewalls (nftables) deny by default
|
||
|
||
🗝 Secrets
|
||
• Vault/Sealed Secrets; no creds baked into images
|
||
• Auto‑rotate API keys & TLS every 60–90 days
|
||
```
|
||
|
||
---
|
||
|
||
## 4️⃣ Compliance: make auditors smile (quickly)
|
||
|
||
| Common ask | Show them… | How edge helps |
|
||
| -------------------------------------- | ---------------------------------------------- | -------------------------------------------- |
|
||
| **PCI DSS 4.0**: “Where is card data?” | Data flow diagram + local tokenization service | Card data never leaves store LAN in raw form |
|
||
| **GDPR/CCPA**: Data minimization | Exported datasets with PII stripped | Only roll‑ups cross WAN; raw stays local |
|
||
| **SOC2 Change Mgmt** | Git history + CI logs | Every change is PR’d, reviewed, merged |
|
||
| **Disaster Recovery plan** | PBS snapshots + restore tests | Proven RPO/RTO per site, not promises |
|
||
|
||
> **Tip:** Automate evidence capture—export config/state hashes nightly to a central audit bucket.
|
||
|
||
---
|
||
|
||
## 5️⃣ Resilience: design for “when,” not “if”
|
||
|
||
```
|
||
Node failure → Ceph 3× replication + live‑migration
|
||
WAN outage → Local DNS/cache/APIs keep serving; queue sync resumes later
|
||
Config rollback → Git revert + CI tag; clusters pull last good bundle
|
||
Store power loss → UPS ride‑through + graceful shutdown hooks
|
||
```
|
||
|
||
**Backup strategy:**
|
||
|
||
```
|
||
Nightly:
|
||
Proxmox Backup Server (PBS) → deduped snapshots → S3/cheap object store
|
||
Weekly:
|
||
Restore test (automated) on a staging cluster, report success/fail
|
||
Quarterly:
|
||
Full DR drill: rebuild a store cluster from bare metal scripts
|
||
```
|
||
|
||
---
|
||
|
||
## 6️⃣ Operations: patch, observe, repeat
|
||
|
||
**Patch pipeline (example cadence):**
|
||
|
||
```
|
||
Mon 02:00 Build & scan images (CI)
|
||
Tue 10:00 Canary to 5 pilot stores
|
||
Wed 10:00 Wave 1 (50 stores) after health OK
|
||
Thu 10:00 Wave 2 (200 stores)
|
||
Fri 10:00 Wave 3 (rest)
|
||
```
|
||
|
||
**Observability stack:**
|
||
|
||
* **Metrics/logs:** Prometheus + Loki (local scrape → batched upstream).
|
||
* **SLOs to watch:**
|
||
|
||
* Cache hit rate (%), TTFB p95 (ms)
|
||
* POS transaction latency (ms)
|
||
* WAN availability (%), sync backlog (# items)
|
||
* Patch drift (stores on N‑2 version)
|
||
|
||
Set alerts on *trends*, not one‑off spikes.
|
||
|
||
---
|
||
|
||
## 7️⃣ Example repo layout (GitOps ready)
|
||
|
||
```
|
||
edge-infra/
|
||
├─ clusters/
|
||
│ ├─ store-001/
|
||
│ │ ├─ inventory-api.yaml
|
||
│ │ └─ varnish-vcl.vcl
|
||
│ └─ store-002/ ...
|
||
├─ modules/
|
||
│ ├─ proxmox-node.tf
|
||
│ ├─ ceph-pool.tf
|
||
│ └─ wireguard-peers.tf
|
||
├─ policies/
|
||
│ ├─ opa/ (Rego rules for configs)
|
||
│ └─ kyverno/ (K8s/LXC guardrails)
|
||
├─ ci/
|
||
│ ├─ build-sign-scan.yml
|
||
│ └─ deploy-waves.yml
|
||
└─ docs/
|
||
├─ dr-runbook.md
|
||
├─ pci-dataflow.pdf
|
||
└─ sla-metrics.md
|
||
```
|
||
|
||
---
|
||
|
||
## 8️⃣ This week’s action list
|
||
|
||
1. **Inventory governance gaps:** Which of the 4 pillars is weakest today? Rank them.
|
||
2. **Automate one scary thing:** e.g., cert rotation or nightly PBS snapshot verification.
|
||
3. **Define 3 SLOs & wire alerts:** TTFB p95, cache hit %, patch drift.
|
||
4. **Pilot the patch wave:** Pick 5 stores, run a full CI → canary → rollback drill.
|
||
5. **Create audit evidence bot:** Nightly job exports hashes/configs to “/audit/edge/YYYY‑MM‑DD.json”.
|
||
|
||
---
|
||
|
||
### Next up ➡️ **Drop 6 – Roadmap & ROI: Your First 90 Stores**
|
||
|
||
We’ll stitch it all together: sequencing, staffing, KPIs, and the board‑ready business case.
|
||
|
||
*Stay subscribed—now that your edge is safe, it’s time to scale it.*
|