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CL-323 Cloud & Platform

Chaos Engineering & Resilience Testing

Find out how the system fails before a customer does. Learners run hypothesis-driven experiments against a defined steady state, control blast radius with scoped injection and automated abort conditions, drill zone and region failure against a stated RTO, and facilitate a game day with the on-call rota in the room. Findings leave as owned, dated reliability work rather than a report nobody reads.

B4Professional
5modules
35skill atoms
2role journeys
Curriculum

What this course covers.

5 modules, 35 named skill atoms. Expand any module to see them.

1Hypothesis-Driven Experiments7 skill atoms
steady state defined by a customer-facing metrichypothesis written before the injectionone variable changed per experimentcontrol group and comparison windowstaging rehearsal before production runsa passed experiment recorded as evidenceexperiments that only prove the obvious
2Blast Radius and Abort Conditions7 skill atoms
scope limited to one instance, zone or traffic sliceabort conditions agreed and automateda kill switch that does not need the failing dependencyfeature flags shrinking exposurea customer impact budget for the exercisestakeholder notice and change recordstopping an experiment that is working too well
3Injection Techniques7 skill atoms
pod and instance termination with Chaos Mesh or Litmuslatency and packet loss with tc and toxiproxydependency error rate injectionCPU, memory and disk pressureDNS and certificate expiry scenariosAWS Fault Injection Simulator templatesclock skew and its quiet damage
4Failure Drills at Scale7 skill atoms
single zone evacuation drillregion failover against stated RTO and RPOdatabase failover with connection draining observedcache and queue loss scenariosa dependency degraded rather than downrestore rehearsed from real backupsdrill results checked against the architecture diagram
5Game Days and Follow-Through7 skill atoms
game day scoped with the on-call rota presentfacilitator, operator, scribe and observer rolesobservability gaps found before the failure isrunbook accuracy tested under pressurefindings ticketed with an owner and a datereliability work ranked against feature worka cadence that survives a busy quarter
Where it fits

CL-323 in the role journeys.

This course appears in 2 of our 45 role journeys. Here is what a learner takes immediately before and after it in each.

Platform / DevOps Engineer

Professional stage
CL-307CL-323CL-501

Site Reliability Engineer

Professional stage
CL-319CL-323SEC-402

Roles this course serves

The capability ladder

This course is authored to band B4.

Every course we run is written to one rung of the CASI ladder, so a plan can be assembled to take a team from where they are to where they need to be.

What do B1–B6 mean?The CASI Capability Ladder — click to expand

Every course targets a band on the CASI Capability Ladder — our six-band proficiency scale, anchored to open standards (O*NET, ESCO, NICE, NIST AI RMF, Bloom's). A band tells you how deep a course goes, and what evidence proves it.

What the learner can doTypical evidence
B1
AwareUnderstands concepts and vocabulary; uses tools with guidance
Knowledge checks
B2
FoundationPerforms standard tasks correctly in familiar contexts
Guided labs, autograded exercises
B3
PractitionerDelivers complete pieces of work independently
Scenario labs, proctored hands-on exams
B4
ProfessionalHandles production-grade complexity, trade-offs and failure modes
Break-fix drills, design defenses
B5
AdvancedEngineers systems end-to-end under constraints; leads others
Rubric-scored capstones, vivas
B6
ExpertSets direction; recognised authority across teams
Portfolio + panel evaluation

A note on B6. Courses in this catalog target B1–B5. B6 is not taught — it is recognised, through a portfolio and a panel, once someone is setting direction for others. Every journey here is built to land a learner at B5.

Next step

Run CL-323 for your team.

This course runs at several lengths depending on how deep you need to go and how much of it your people already have. Tell us who is being trained and we will scope it.

Add it to a training plan Talk to our team Check your team’s level free