Роман Яворский "Introduction to DevOps"

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Introduction to DevOps
Roman Yavorskiy
2016 / 04 / 28

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DEFINITION

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DevOps Definition
 Fancy name for SysAdmins
 Dev doing Ops job
 Having CI in place
 Using Chef (or similar tool)
 Automated Deployment
What is DevOps?

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DevOps Definition
 DevOps integrates developers and operations teams in order to improve collaboration and
productivity automating infrastructure, automating workflows and continuously measuring
application performance
A good attempt of DevOps definition

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PRINCIPLES

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DevOps Principles
 Collaboration
 Automation
 Self service
 Holistic system view
Most common principles

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DevOps Principles
 DevOps movement starts from people
 Improved communication
 Silo’s elimination
 Common ways of doing things
Collaboration

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DevOps Principles
 Not about having CI
 Starts from automating infrastructure
 All the way up to automated testing, deployment
 Doesn't mean automate everything
Automation

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DevOps Principles
 Eliminate intermediate links
 Having buffer/shared resource over request
 Make possible to dev’s to do on their own
Self service

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DevOps Principles
 Not all problem should be solved with code
 Infrastructure is also part of application
 Think about product not application
“Holistic system thinking is about, as a member of
an organisation, being able to think about how that
problem can be solved in as many ways as
possible, and taking into consideration every aspect
of the product, the customer, the infrastructure and
so forth”
Holistic system view

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PRACTICES

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DevOps Practices
 Configuration Management
 Continuous Delivery
 Monitoring and metrics collection
 Version Control
Useful practices

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DevOps Practices
 Infrastructure as a code
 One source of truth
 Idempotence
Configuration management

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DevOps Practices
 Automate build/testing/integration/deployment
 Every commit should build on an integration machine
 Test in a clone of the production environment
 Iterative
 Visibility
Continuous delivery

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DevOps Practices
 Live view
 Quick reaction on unavailable service
 Time + value + name
 Events
 See performance changes in dev
Monitoring and metrics collection

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DevOps Practices
 Keeping history
 Incremental changes
 Versioning
 Backup
 Track differences
 And much more
Version control

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TOOLS

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DevOps Tools
 Infrastructure as code
 Built-in modules and custom scripts
 Provision multiple servers
 “Solo” mode
 Push/pull
Configuration management

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DevOps Tools
Configuration example

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DevOps Tools

Run with “ansible-playbook <PLAYBOOK_NAME>.yml“
Configuration example

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DevOps Tools
Comparison

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DevOps Tools
Workflow example

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WHEN DO YOU NEED DEVOPS

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When do you need DevOps
 Works in dev environment,
but doesn’t work in production
 Complicated deployment procedure
 Took long time to recover
 Can’t deploy as frequently as feature
 Load testing in production
 Retrieving information from prod is
complex procedure
Signs

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BENEFITS

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Benefits of DevOps
 "Analysis of more than 20 000 people (from 110 countries), technical professionals around the
world, making this the largest and most comprehensive DevOps study to date"
 "Respondents came from organizations of all sizes: from tiny startups to 10,000-employee
companies"
 High-performing IT organizations experience 60X fewer failures and recover from failure 168X
faster than their lower-performing peers. They also deploy 30X more frequently with 200X
shorter lead times.
 “Job satisfaction also highly correlates with DevOps practices and culture”
 “DevOps practices increase employee satisfaction, which leads to better business outcomes“
State of DevOps

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Benefits of DevOps
 Faster delivery
 Lower failure rate
 More stable infrastructure
 Reduced costs
 Happier lives for everybody
Why does it worth

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THANK YOU

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QUESTIONS ?