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container-solutions.com info@container-solutions.com Testing Cloud Native Applications @pini42

What is Cloud Native?

Containers - Docker

Fast / Customer-Centric

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

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?

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