Redundancy and hidden SPOFs
On This Lesson 4 topics
This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.
In this lesson
find single points of failure beyond servers.
Planned topics
- Redundancy at each layer: instances, zones, databases, networks, DNS.
- Hidden SPOFs: a shared config store, a certificate expiry, one CI pipeline, one engineer.
- Redundancy must be tested; unused failover paths rot.
- Check shared fate: two replicas on one host are one failure.
Draft outline details
Demonstration
a layered checklist with questions per layer and a column for evidence (test date).
Check your understanding
Name a hidden SPOF that is not a server.
Show answer
An expiring certificate, shared config, or a single identity provider.
Practice
Apply this lesson with the module's lab, exercises and quiz.
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