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What is Cloud Native?



Containers - Docker


Fast / Customer-Centric

Sa

fe a

nd

Re

liab

le

LIMITS SPEED, SAFETY AND COMPLEXITY

ACHIEVE QUALITY THROUGH SPEED


Dynamic Scheduling - Kubernetes


It is not the strongest of the species that survive,

but the most adaptable

Charles Darwin


What do companies want?


● System Thinking: A business can be seen as a system that processes resources to deliver value to its customers with an emphasis on the performances of the entire system versus local optimization

System Thinking


● Feedback loops enable knowledge of the system to flow back from the customer to the business and allow for better informed decisions

Feedback Loops


● Continual experimentation enables improvements at every level of the system and the emergence of new business initiatives

Continual Experimentation


CUSTOMER CENTRIC BY GOING FAST

WITHOUT BREAKING THINGS


What do we find

when we go out into the field?


Value Stream Map







Why is this actually

happening?












1. Agile




CLOUD NATIVE


2. DevOps




CLOUD NATIVE


5. Automation and CI/CD



6. Organisation and culture




Experimental culture

JournalOutput & conclusionsDecide: kill or continue

Experiment


What will be the impact on the

testing?


Decentralization and local freedom over central control

"organizations which design systems ... are constrained to

produce designs which are copies of the communication

structures of these organizations."

— M. Conway


Infrastructure provisioning

Manual operations create bottlenecks


Testers


Testers


Full test automation according to test pyramid

Microservices and CI/CD demand full automation







Testing is not finished when software is deployed

Developers need to build testability into the applications to

allow continuous testing



Data driven diagnosis and testing in production

Lots of opportunities to collect data due to automation.

Alert at near misses and other non-events

Employ advanced protection techniques such as circuit

breakers


Advanced deployment strategies

Canary releases, A/B testing and more


https://thenewstack.io/deployment-strategies/


Blameless postmortems

When blame is assigned, organisation stops learning



Complex systems fail in complex ways

Some issues will only happen in production. Large scale

exposes a failure that was built into the design and hidden by

safety measures. But erosion of the safety measures,

eventually leads to series of events build up until something

trips the systems into a failure

Adrian Cockcroft


Questions?


Date post:	14-Aug-2020
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