# rainbowvapes.co.uk

Vape shop WooCommerce site. Good client — £200/month SEO and break-fix support.
**Owner: James (Rainbow Vapes Ltd).** Second site: `rainbowflavours.co.uk` (alias of `rf.kaburu.co` on kaburusvr).

## Email

- `hello@rainbowvapes.co.uk` + `no-reply@rainbowvapes.co.uk` — both forward to `sellars534@aol.com` (James reads at AOL)
- Transactional sending via Fluent SMTP; re-point to Brevo on migration
- ⚠️ Brother created a hello@↔no-reply@ forward loop on guru — do NOT replicate

## Migration — ✅ COMPLETE (Tue 2026-08-18)

Migrated from guru.co.uk to kaburusvr. Cutover completed 07:00 BST.
Full runbook: [[rainbowvapes-migration]]. DNS A record → 49.13.202.144 (CF proxied). SSL via acme.sh DNS-01. Email forwarders → sellars534@aol.com via Postfix virtual.

**Issue during cutover:** cron-created `.maintenance` file was root:root 640 — caused HTTP 500 until removed.

## Hosting

| Item | Detail |
|------|--------|
| Current host | kaburusvr (Hetzner CCX23) |
| Cost | Shared hosting (included in MSP) |
| Server IP | 49.13.202.144 |
| CyberPanel user | rainb1286 |
| Home dir | /home/rainbowvapes.co.uk |
| WP dir | /home/rainbowvapes.co.uk/public_html |
| PHP | 8.3 (lsphp83) |
| WP | 7.0.4 |
| Theme | Divi 4.27.7 (avanti child, latest v4, no v5 upgrade planned) |

## Stack

WooCommerce, Divi 4, Divi Booster, DiviFlash, YITH Gift Cards, YITH Advanced Product
Options, YITH Added to Cart Popup, WP Loyalty/Rules, Weight Based Shipping, Worldpay,
FastPixel, Rank Math Pro, ShortPixel, ACF, Complianz, FiboFilters Pro,
Ajax Search for WooCommerce, 1account Age Verification, Fluent SMTP, MainWP child,
Markdown for Agents and Statistics.

## Migration to Hetzner — PROPOSED

**Proposal:** Move to kaburusvr.uk (49.13.202.144) at £45/month.
Saving client £10/month vs current £55. Server costs covered by this one client.

**Key selling point — Redis object cache (⚠️ DISPROVEN 2026-08-14):**
Checkout page on shared hosting has no object cache — DB hit on every request.
*Note: load test proved Redis object cache makes no difference here — the site is PHP-render-CPU-bound,
not DB-bound. See "Redis A/B" below. Do not pitch Redis as the fix.*

### Baseline performance (2026-05-18, shared hosting, no Redis)

| Page | TTFB | Total | Notes |
|------|------|-------|-------|
| Homepage | 92ms | 108ms | LiteSpeed cached |
| Shop | 102ms | 118ms | LiteSpeed cached |
| Product page | 128ms | 144ms | LiteSpeed cached |
| **Checkout** | **2,205ms** | **2,216ms** | **Uncached — DB cold hit every time** |

Checkout at 2.2s TTFB is the pain point. Age verification + YITH plugins + WooCommerce
session handling all hitting DB with no object cache. Redis would bring this under 300ms.

**Post-migration test:** Run same curl baseline after migration + Redis live for A/B proof.

**2026-08-14 load test (kaburusvr, synthetic FastPixel-style crawl):** Fired 11.45 req/s
(FastPixel's peak) of uncached page renders at rf.kaburu.co (the rainbowvapes replica, 31
published pages, avanti+Divi+WooCommerce). Result: 4 vCPU box saturates on uncached renders
(load ~10, CPU ~96% nice=lsphp, 2% idle), sustaining only ~4.6 req/s, p50 latency 2.6s, p95 hits
the 15s timeout (16/287 failed). Recovers to 95% idle immediately after — no crash, no 500/503
(degrades to slow, unlike the shared host's LVE 503s).

**Redis A/B (2026-08-14):** Enabled Redis object cache on the replica (redis-cache plugin, Predis
client) and re-ran the identical test. **No meaningful improvement** — 4.6 → 4.7 req/s, errors
unchanged, CPU still saturated (87% nice = lsphp). Redis served 68% of object lookups (~79K hits
during test) but the bottleneck is PHP render CPU, not the DB. **Conclusion: Redis object cache
does NOT fix this workload.** Real levers: LSCache page cache (repeat hits only), fix avanti theme
loading admin code (`jedi-apprentice`) on every frontend render, throttle/schedule FastPixel
crawls off-peak, or more vCPU.

## Notes

- Facebook for WooCommerce: plugin deleted, 23,814 DB rows purged 2026-05-18.
  Notorious for re-seeding — monitor action scheduler for facebook hooks returning.
- Divi PHP warnings (ThemeBuilderRequest.php null taxonomy) — v4 bug, low priority
- 1account age verification PHP 8 compat warnings — low priority, not breaking
- Markdown for Agents and Statistics 1.4.4 — active, serving bot markdown pages
- No Redis currently — object-cache.php not present
- **2026-08-13 outage (16m18s):** UptimeRobot (Falkenstein node 168.119.96.239) reported a
  connection timeout 22:44:26→23:00:44. Root cause = FastPixel full-site cache-warm crawl
  (peaked 687 req/min at 22:40) buckling the shared host — FastPixel's own error.json logged
  "page stopped responding (timeout 30000ms)", plus 8×500 + 9×503 in the window. Real Google
  organic traffic still got 200s, but uncached pages were timing out. This is the shared-hosting
  pain point the Hetzner+Redis migration pitch addresses.

## Pending

- [ ] Talk to client about migration (Steve, 2026-05-19)
- [ ] Run GTmetrix/PageSpeed baseline before migration
- [ ] Migrate to kaburusvr, enable Redis, run post comparison
- [ ] Add to Matomo tracking