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feat: expand MQTT contract and reliability lessons

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Ryan
2026-10-13 18:08:17 +03:30
parent 2d639d78eb
commit f9ab91ed60
17 changed files with 2083 additions and 91 deletions
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lessons/README.md
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@@ -17,8 +17,9 @@ Follow these lessons in order from the learning project root. Read the concept a
9. [Learn MQTT 5 sessions through failure experiments](09-sessions-recovery.md)
10. [Expiry, presence, and retained state](10-expiry-presence-state.md)
11. [MQTT security boundaries](11-security-boundaries.md)
11B. [Provision device ACLs with Mosquitto Dynamic Security](11b-dynamic-security.md) — optional implementation extension to Section 11
Continue Sections 12–15 in the course before implementing [Section 16 — MQTT 5 controls](16-mqtt5-controls.md). The course's application/persistence/operations Sections 12–15 and 17–18 remain guided checklists, not complete reference programs.
Continue with course Sections 12–15 after the security lessons, then implement [Section 16 — MQTT 5 controls](16-mqtt5-controls.md). Course sections 12–15 and 17–18 remain guided checklists, not complete reference programs.
Paho is pinned to **v0.23.0**, the selected course baseline. Use the matching checkout under `references/paho.golang-v0.23.0/`. This release requires Go 1.24 or newer; the lessons' Go 1.25 baseline is compatible.
@@ -51,6 +52,7 @@ Checked local Markdown links, source paths, code fences, and expandable answer b
| Clean Start, Session Expiry, Session Present, recovery stores | 9 | Predict network versus process restart outcomes |
| Message Expiry, retained deletion, Will/Will Delay, freshness | 10 | Observe stale command suppression and presence limitations |
| TLS, authentication, ACLs, identity and response destinations | 1 and 11 | Fail each security boundary deliberately |
| Live per-device provisioning and revocation | 11B (optional) | Deny cross-device topics, then disable a connected client |
| Subscription options, unsubscribe, shared consumers | 16 | Compare live/replayed messages and consumer distribution |
| Receive Maximum, packet size, properties, aliases, capabilities | 16 | Record packet direction, negotiated limit, and measured behavior |
| Docker mount/volume identity, recreation, overrides, crashes | Broker operations | Explain exactly which state survives each command |