13. Dynamic requirements
Test and learn
Be flexible – change is inevitable
Progressive Refinement
Effective engineering & change
control
Evolutionary
Architecture & Engineering
@dwmkerr
14. Dynamic requirements
Test and learn
Be flexible – change is inevitable
Progressive Refinement
Effective engineering & change
control
Classical
Architecture & Engineering
Evolutionary
Architecture & Engineering
Static requirements
Well known strategies
Plan well – change is expensive
Detailed Roadmap
Effective management & planning
@dwmkerr
24. Development
Responsible for building
new products and services
Assigned to build things
Operations
Responsible for maintaining
existing products and services
Assigned to maintain stability
@dwmkerr
25. Change is the casus belli for a
secret war in many organisations
@dwmkerr
37. Development Operations
Responsible for building
new products and services
Assigned to build things
Responsible for maintaining
existing products and services
Assigned to maintain stability
@dwmkerr
38. DevOps
Responsible for building and
maintaining new products and services
Assigned to build and maintain
robust and resilient things
@dwmkerr
5m mark:
Serving clients across the world, deploying in airports, writing code.
To me, this is important.
This is about allowing us to do what we love the most – build things, tinker, experiment, learn
It’s about reducing conflict, making the places we work more exciting and enjoyable places to work out.
Cannot escape the nerves that I've missed something out because there is no code, and I am not the only one!!
- Before we talk about what DevOps is, why we should care, and if we do, what we do about it, it is important to understand where it has come from.
The way we build has changed dramatically.
Traditional, building software was like classical architecture
Very expensive materials, very expensive construction
Known use case, build perfectly, rarely change.
Build upon a rickety structure, software made of a foundation which was never designed to be adapted
A lot more change is happening
Nowadays, requirements of users are much more flexible
Technology is cheaper & faster, change is much more common
Now more like city planning: evolutionary architecture
Hosting, Zoning, Infrastructure, Traffic, Capacity
In the world of software this might be about designing small, modular components which we can swap in and out, or plugin like systems, or APIs which we can have multiple versions of
In architecture, this might be containers, service orientation etc etc
A lot more change is happening
A lot more change is happening
Complicated systems
Deterministic and predictable, laws are applicable again and again, learn to get *very* good at designing a bridge
Role defining – setting job and task descriptions
Decision making – find the ‘best’ choice
Tight structuring – use chain of command and prioritise or limit simple actions
Knowing – decide and tell others what to do
Staying the course – align and maintain focus
Complex adaptive systems
Many interacting parts, which might be deterministic but chaotic, unexpected results, difficult to predict.
Relationship building – working with patterns of interaction
Sense making – collective interpretation
Loose coupling – support communities of practice and add more degrees of freedom
Learning – act/learn/plan at the same time
Notice emergent directions – building on what works
- Before we talk about what DevOps is, why we should care, and if we do, what we do about it, it is important to understand where it has come from.
A lot more change is happening
We enter a feedback loop
We do whatever we can to build faster, better tech, better process, whatever
A lot more change is happening
We enter a feedback loop
We do whatever we can to build faster, better tech, better process, whatever
A lot more change is happening
We enter a feedback loop
We do whatever we can to build faster, better tech, better process, whatever
A lot more change is happening
A lot more change is happening
A lot more change is happening
Business attack anyone with a computer
Business attack anyone with a computer
Business attack anyone with a computer
Business attack anyone with a computer
Business attack anyone with a computer
Business attack anyone with a computer
Business attack anyone with a computer
Business attack anyone with a computer
Business attack anyone with a computer
A lot more change is happening
A lot more change is happening
This bullshit slows you down. It’s not fun. And in an organization where you are not learning, you are moving backwards.
You can tell how happy I am by how much of my day I am in tmux.
Healthy work environment.
Familiarise yourself with this. Read the books. Learn about lean. Come to conferences. Talk to people. Blog about it.
There’s a lot of stuff in devops, getting it to work is not easy, learn about how other people have done it, and learn the skills to do it yourself.
A lot more change is happening
A lot more change is happening
- When someone objects to what you are doing, try to understand why
This change takes a while to happen, as you go through it, peoples roles will change, peoples goals will change
This is a cultural change
- Story: talking to a colleague who was paying to do his own exam
Think about the ‘human case’, when things fall back to human beings
