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DevOps at its CoreAnn Marie Fred
IBM July 15, 2015
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About Me
Duke BS CS 1999
UNC MS CS 2005
Husband and 2 daughters
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About MeIBMer since 1998
pervasive & mobile
web applications & portals
IT systems management
cloud computing
websites
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About MeDevOps practitioner and evangelist since 2011
5 very different DevOps teams:
SmartCloud Continuous Delivery dev/test
SmartCloud Orchestrator dev/test
IBM Cloud Orchestrator on Cloud dev/test
Service Engage dev/test/ops
Marketplace dev/test/ops > manager/squad lead
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Part 1: DevOps at its Core
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DevOps: Goals
Happy Developers
Happy IT Operators
Happy Business Stakeholders
Happy Consumers
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Happy DevsWork-Life Balance
Fun
Passion
Uptime
Quality
Velocity
Business Value
Sharing Knowledge & Experience
Broad & Deep Skills
Clear Communications
Continuous Process Improvement
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Happy OpsWork-Life Balance
Fun
Passion
Uptime
Quality
(maybe not Velocity)
Business Value
Sharing Knowledge & Experience
Broad & Deep Skills
Clear Communications
Continuous Process Improvement
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Happy BusinessWork-Life Balance
Fun
Passion
Uptime
Quality
Agility (+)
Velocity
Business Value
Sharing Knowledge & Experience
Broad & Deep Skills
Clear Communications
Continuous Process Improvement
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Happy ConsumersFun
Passion
Uptime
Quality
Agility
Velocity
Business Value
Clear Communications
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DevOps: Core ValuesWork-Life Balance
Fun
Passion
Clear Communications
Sharing Knowledge & Experience
Broad & Deep Skills
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DevOps: Core ValuesUptime
Quality
Agility
Velocity
Business Value
Continuous Process Improvement
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Warm Fuzzies: Work-Life Balance, Fun, and Passion
Attract & Retain Talent
Hire for the Warm Fuzzies.
Assess Management on the Warm Fuzzies.
Consciously make these happen.
The other DevOps Core Values help immensely.
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Clear Communications: Required
Talking
Chat Services
Wikis and Blogs
Forums
Bug Reporting & Tracking
Agile Planning & Tracking
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Clear Communications: Extras
Co-location
Social Media
Conferences
User Groups and Meetups
Email and Newsletters
Specific Agile Methodologies (Scrum, Kanban, etc.)
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Sharing Knowledge & Experience, Broad & Deep
Skills: RequiredSee: Clear Communications
Document as you build: how and why
Informal Training
Internet Resources
Code Reviews
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Sharing Knowledge & Experience, Broad & Deep
Skills: ExtrasWork on things you don’t know how to do.
Pair Programming
Mob Programming
Cross Pollination
Open Source Model
Formal Training
Books
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Uptime: Required
See: Quality
Monitoring
Graceful Fail-over
Sharing the Pager
Post-Mortems
Continuous Delivery
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Continuous Delivery
Automated Deployment into Production
Deployment Automation
Infrastructure as Code
Frequent Deployments (ideally, several per day)
Small, Incremental Changes
Zero Downtime
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Continuous Delivery
Automated Tests in Production or At Least Staging
Including NFRs: performance, security, etc.
Staged Rollouts
Dark Launches
Rolling Deployments
Green/Blue Deployments, etc.
Experiments
A/B Testing, etc.
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Uptime: Extras
See: Sharing Knowledge & Experiece, Broad & Deep Skills
Graceful degradation
Dedicated Support Team
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Quality: RequiredSee: Uptime
Bug Tracking
Source Control
Code Reviews
Testing NFRs: security, performance, etc.
Continuous Integration
Continuous Testing
Manual Testing
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Continuous Integration
On Every Check In of Source Code:
Build Automatically
Test the Source Code Automatically
Static Code Analysis
Linters for Code Style
API Tests
Anything that doesn’t require a running system
Package Build Artifacts for Deployment
Store Build Artifacts in a Library
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Continuous TestingRetrieve Build Artifacts from Library
Deploy Automatically in the Lab
As close to production as possible (Docker, VM images, Chef)
Automatically Test Running Systems
Report Test Results Quickly
Voting and Non-Voting Tests
Failed tests make the build fail
If the build fails, fix it before moving on
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Quality: Extras
See: Sharing Knowledge & Experience, Broad & Deep Skills
Dedicated Test Team
Continuous Delivery
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AgilitySee: Clear Communication
Agile Planning and Tracking
Frequent Releases
Continuous Delivery Helps
Short Feedback Loops
Autonomous, Empowered Teams
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Quality and Agility"Agile has not only improved our ability to plan effectively but it also has allowed us to spend more time working on user stories by improving the quality of the code we deliver." - Richard Gebhardt, Technical Team Lead for Service Engage.
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VelocitySlow at first, while building the frameworks for quality and uptime.
Faster in the long run.
Low Bug Count
Low Technical Debt
Frequent Releases
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Agility and Velocity
"By having daily scrum meetings, everyone knows who is working on what, resources quickly get directed to problem areas and impediments are addressed quickly and efficiently." - Chuck Brant, Service Engage Release Manager.
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Business ValueSee: Uptime, Quality, Agility, Velocity
The Right Stakeholders
Feedback from Consumers
User Centered Design
Data Driven Decision Making
Evaluate teams on business value.
Monitor business value.
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Agility and Business Value
"As a product line manager, working on one-week sprints gives me the flexibility to change priorities as things change. I can still get the big-ticket items delivered - but I can do so without getting locked into an unyielding plan and can react rapidly to shifting business priorities." - Pete Marshall, Product Manager, IBM Service Engage/Cloud Foundation Services.
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Continuous Process Improvement
See: Sharing Knowledge & Experience
Blameless Post Mortems
Sprint Retrospectives
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Part 2: How We DevOps
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Inspired by Spotify, Informed by
Scrum & KanbanSquads
Guilds
Most people have more than one role
Not exactly Spotify…
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Business: Managers
First-Line Managers handle:
Staffing
HR issues
Money
Compliance
Red tape & paperwork
Removing impediments
Career planning
Coaching
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Planning: Squad Leads
These are the stakeholders.
Loosely defined milestones and long term plans from upper management.
Define and prioritize the Story backlog.
“As a [who], I want to [what].”
Description, Business Value, Acceptance Criteria
Run weekly Story Scrub with the squad to ensure that stories are well defined.
Manage inter-squad dependencies.
Review what the squad delivers to make sure it meets the acceptance criteria.
Get customer feedback.
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Executing: Technical Leads
They own the implementation of the stories.
Which high-priority stories are ready to be worked on?
Story points: planning poker by the team
Story breakdown into tasks, with the team
Final choice of stories for the sprint, with the team
Adding tasks to the Kanban board
They also help coordinate work between squads, and define component boundaries and interfaces.
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Executing: Scrum Masters
Scrum Masters (rotating position) keep the process moving.
Run daily stand-up meetings
Reproduce defects, add valid defects to the Kanban board to be worked on
Investigate deployment errors, get them fixed
Run weekly group code review or learning activity
Run weekly retrospective
Present weekly playback
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Dev/Test/Review: Squad Members
Implement the tasks on the Kanban board.
Defects have higher priority than new tasks.
Pick up a new top-priority task when you’re ready. Your code is under review, and you’ve reviewed others’ code.
Prefer tasks you don’t know how to implement.
Tasks are often implemented with help.
Free time to work on what you like, once the tasks for the sprint are implemented.
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Review/Deploy/Operate: Committers
Strict code review process, based on the OpenStack model, using Gerrit.
Excellent code reviewers can earn a “+2” or “committer” designation.
Code changes must be reviewed/approved by at least two people other than the originator, one of whom must have a “+2” designation.
“+2s” handle the final merge to master, which kicks off the green/blue deployment to production.
“+2’s” are the ones on call for critical problems.
ALL squad members help fix problems, not just “+2s”.
Switching to Github pull request model now.
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TestIndividual squads own their own unit tests and functional tests.
Code coverage reports required, aim for 100%. Low coverage numbers are a risk to SVT/IVT.
SVT/IVT team writes automated tests for things like:
End to end, cross-component flows
Multi browser, multi geography, etc.
Performance, scalability, security, etc.
Automated tests can fail the build / prevent a deploy.
SVT/IVT also does manual and free-form testing.
The same team sets up frameworks for running experiments (A/B tests, etc.)
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OperationsCombination of DevOps squads and dedicated Ops teams
PaaS (Bluemix, Heroku): Fewer low-level operational concerns
Docker containers: Portable across deployment platforms
Monitoring & Alerting (New Relic, Pingdom, PagerDuty)
Logs (ELK stack, Logentries, custom tools)
Site performance testing (Sitespeed, Webpagetest, Yahoo, Google PageSpeed…)
Security testing (AppScan, etc.)
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ResourcesMe: [email protected], Twitter @DukeAMO
DevOps Days conferences
Code as Craft, Etsy’s Engineering Blog
Spotify Squad Model
Blogs from Netflix, Facebook, IBM
Books from O’Reilly Media