Phase 14Advanced15 of 17 in Redis

Production Operations

Security with ACLs, TLS and network isolation; failure injection for every Redis role; multi-region designs; managed services and Kubernetes; upgrades, backups and disaster recovery.

Running Redis well is mostly about the things that go wrong: someone reaching it from the internet, a zone going down, a region failing, an upgrade gone bad, or a backup that doesn't restore.

Security content here is defensive: what the risks are, how to detect exposure, how to harden, and how to verify.

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5 topics ~46 min 7 code blocks & diagrams

Start with the first topic

14.1

Security: ACLs, TLS, Network Isolation

Redis must never be reachable from untrusted networks. Layer defences: private networking and firewalls, protected mode, per-service ACL users with least privilege (key patterns and command categories), TLS in transit, managed secrets, protected configs, encrypted backups, and fast patching.

10 min 2 code practice

14.2

Failure Injection: Breaking Redis on Purpose

For each Redis role, rehearse the failures: Redis down, slow, primary or replica lost, partition, maxmemory, hot key, huge key, stampede, slow Lua, consumer crash, duplicate message, restart, persistence recovery and cluster node failure. For every scenario, know what breaks, what's lost, and how you recover.

10 min 2 code practice

14.3

Multi-Region Redis

Across regions you must choose: one primary region with read replicas elsewhere (simple, stale remote reads, failover by promotion), independent per-region caches (fast, no cross-region consistency), or active-active with conflict-free replicated data types (Redis Enterprise/Cloud). Decide per data type, with explicit source of truth, latency, residency and DR goals.

8 min 1 diagram practice

14.4

Managed Redis and Redis on Kubernetes

Managed services (ElastiCache, MemoryDB, Memorystore, Azure, Redis Cloud, Upstash) handle failover, patching and backups; running Redis yourself on VMs or Kubernetes gives control and can cost less, but you own everything. Choose based on durability needs, features, engine (Redis or Valkey), cost and team skills.

9 min 1 code practice

14.5

Upgrades, Backups, and Disaster Recovery

Upgrade Redis by rolling through replicas and failing over, never by restarting a primary in place. Back up RDB files off-host and test restores. Define RPO and RTO per keyspace and rehearse recovering from a lost node, a lost zone, a bad FLUSHALL, and a lost region.