The DevOps handbook

The DevOps handbook

1. technical debt

   • Dev and Ops goals
     • Dev: respond to changes in market
     • Ops: provide stable and secure service
     • The Corre chronic conflict
       • The downward spiral
         • every company is a technology company
         • 3 Acts
           • Act 1: Tech Debt + Ethernal Promise to fix + sys more prone to failure are the most important Act 2: Compensate broken promise with not planned/analysed new promises (+ tech debt) Act 3: Everything becomes more difficult/slower and tightly coupled. getting worse until we lose in the marketplace
         • Costs: Learned helplessness + burnout And Lost in value creation

2. DEV

   • Posibles elementos a incluir desde Desarrollo para evitar el downward spiral
   • Small development teams
     • Lower stress and higher satisfaction
     • frequent deployments even during the day
       • Dark Launches
     • Long term
       • No culture of fear
     • Peer reviews

3. DevOps Movement

   • Value streams
     • The sequence of activities required to design, produce, and deliver a good or service to a customer, including the dual flows of information and material.
     • Tech VS. The process required to convert a business hypothesis into a Technology-enabled service that delivers value to the customer
     • Metrics
       • Deployment Lead Time
         • From Check In to Version Control to running in production, includes testing and operation. More predictable and Mechanic. The one we should focus on
       • Process Time
         • Process time starts when someone begins working on the request
       • % C/A
         • Percent Complete and Accurate. It reflects the quality of output of each step in our value stream
       • Total Lead Time
         • Lead time starts when the request is made and ends when it's fulfilled (what the user experiences)
   • The Three Ways
     • Flow
       • Fast Flow of work from development to operations to the customer (deliver value quickly)
       • Goal: Reduce Lead Time
       • Continuous Build, integration, test & deployment
       • Environments on demand
       • Limit WIP
         • Reduce negative impact of multitasking
         • Limit # cards on columns
       • Make Our Work Visible
         • To see where work is flowing well and where work is queued or stalled
         • Visual work boards
       • Reduce Batch Sizes
         • Large batch sizes -> skyrocketing levels of WIP and variability in flow
         • Small batch sizes -> less WIP, faster lead times, faster error detection, less rework
         • Continuous deployment
       • Reduce # of Handoffs
         • Automate portions of work
         • Reorganize teams
           • Reorganize teams so they can deliver value without dependencies
     • Feedback
       • Enable Fast & constant flow of feedback from ops to dev at all stages of the value stream
       • Continually shorten & amplify feedback loops
     • Continual Learning and Experimentation
       • Enables the creation of a generative, high trust culture that supports a dynamic, discipined & scientific approach to experimentation and risk-taking, facilitating the creation of organizational learning
   • convergence of DevOps
     • Theory of Constraints
     • Toyota Kata Movement
     • continuous delivery
     • Lean
       • Lean Principles
     • Agile
     • Infraestructure as a code

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