I deploy on Fridays (and maybe you should too) (ConFoo 2024)

I DEPLOY ON FRIDAYS (AND MAYBE YOU SHOULD TOO) MICHIEL
ROOK @MICHIELTCS

@michieltcs #StandWithUkraine DEPLOYING

@michieltcs #StandWithUkraine ON A FRIDAY

@michieltcs #StandWithUkraine DEPLOYING?

@michieltcs #StandWithUkraine ON A FRIDAY??

@michieltcs #StandWithUkraine

@michieltcs #StandWithUkraine BUT WHY?

@michieltcs #StandWithUkraine TRADITION

@michieltcs #StandWithUkraine FEAR

@michieltcs #StandWithUkraine RISK

@michieltcs #StandWithUkraine CONTROL

@michieltcs #StandWithUkraine CONFIDENCE & TRUST

@michieltcs #StandWithUkraine TIME TO REPAIR / RECOVER

@michieltcs #StandWithUkraine ON-CALL STRESS

@michieltcs #StandWithUkraine SO

@michieltcs #StandWithUkraine DON'T DEPLOY ON A FRIDAY!

@michieltcs #StandWithUkraine I USED TO SAY THAT TOO

@michieltcs #StandWithUkraine I LIKE MY WEEKENDS

@michieltcs #StandWithUkraine AND MY EVENINGS

@michieltcs #StandWithUkraine WHAT ABOUT BUGS?

@michieltcs #StandWithUkraine WHAT ABOUT 3 PM?

@michieltcs #StandWithUkraine WHAT ABOUT THURSDAY?

@michieltcs #StandWithUkraine FRIDAY IS 20% OF THE WEEK

@michieltcs #StandWithUkraine IMPROVE!

@michieltcs #StandWithUkraine IF IT HURTS DO IT MORE OFTEN

@michieltcs #StandWithUkraine FAILURE IS NOT THE OPPOSITE OF SUCCESS

SUCCESS CONSISTS OF GOING FROM FAILURE TO FAILURE WITHOUT LOSS
OF ENTHUSIASM. Winston Churchill

@michieltcs #StandWithUkraine BIG STEPS

@michieltcs #StandWithUkraine FAIL BIG

@michieltcs #StandWithUkraine SMALL STEPS

@michieltcs #StandWithUkraine FAIL SMALL

@michieltcs #StandWithUkraine MAKE IT EFFORTLESS

@michieltcs #StandWithUkraine REDUCE RISK

@michieltcs #StandWithUkraine $ = REALIZED VALUE CREDITS TO @FGOULDING

@michieltcs #StandWithUkraine CONTINUOUS EVERYTHING

@michieltcs #StandWithUkraine DELIVERING VALUE TO USERS

@michieltcs #StandWithUkraine SAFELY & QUICKLY

@michieltcs #StandWithUkraine IN A SUSTAINABLE WAY

@michieltcs #StandWithUkraine EASY TO DEPLOY

@michieltcs #StandWithUkraine EASY TO TEST

@michieltcs #StandWithUkraine EASY TO INSPECT

@michieltcs #StandWithUkraine DEV BUILD / TEST ACCEPTANCE PRODUCTION CONTINUOUS DELIVERY

@michieltcs #StandWithUkraine CODE IS ALWAYS IN A RELEASABLE STATE

@michieltcs #StandWithUkraine DEV BUILD / TEST ACCEPTANCE PRODUCTION CONTINUOUS DEPLOYMENT

@michieltcs #StandWithUkraine IF YOU CAN DEPLOY ANY TIME

@michieltcs #StandWithUkraine THEN YOU CAN DEPLOY ON FRIDAY

@michieltcs #StandWithUkraine ELITE PERFORMERS Comparing the elite group against the
low performers, we find that elite performers have… frequent code deployments 208 TIMES MORE time to recover from incidents 2,604 TIMES FASTER lead time from commit to deploy 106 TIMES FASTER change failure rate (changes are 1/7 as likely to fail) 7 TIMES LOWER Throughput Stability Source: 2019 State Of DevOps report

@michieltcs #StandWithUkraine BUT OUR CODE IS OLD

@michieltcs #StandWithUkraine BUT OUR CODE IS NOT UNDER TEST

@michieltcs #StandWithUkraine BUT OUR CODE IS IMPOSSIBLE TO CHANGE

@michieltcs #StandWithUkraine DEALING WITH "LEGACY"

STRANGLER PATTERN

@michieltcs #StandWithUkraine ORIGINAL MONOLITH DB @michieltcs

@michieltcs #StandWithUkraine ORIGINAL MONOLITH PROXY SERVICE ORIGINAL MONOLITH DB DB
DB @michieltcs

@michieltcs #StandWithUkraine ORIGINAL MONOLITH PROXY SERVICE ORIGINAL MONOLITH ORIGINAL MONOLITH
SERVICE SERVICE SERVICE PROXY DB DB DB DB DB DB @michieltcs

BRANCH BY ABSTRACTION

@michieltcs #StandWithUkraine CLIENT OLD MODULE CLIENT CLIENT @michieltcs

@michieltcs #StandWithUkraine CLIENT ABSTRACTION LAYER OLD MODULE CLIENT CLIENT @michieltcs

@michieltcs #StandWithUkraine CLIENT ABSTRACTION LAYER OLD MODULE CLIENT CLIENT ABSTRACTION
LAYER NEW MODULE @michieltcs

@michieltcs #StandWithUkraine CLIENT ABSTRACTION LAYER CLIENT CLIENT NEW MODULE @michieltcs

@michieltcs #StandWithUkraine CLIENT NEW MODULE CLIENT CLIENT @michieltcs

ON BRANCHES

@michieltcs #StandWithUkraine CONFLICTS

@michieltcs #StandWithUkraine "This pull request affects 31 files... could be
a lot of conflicts if we don't merge it soon"

@michieltcs #StandWithUkraine CONTINUOUS INTEGRATION

@michieltcs #StandWithUkraine INTEGRATE TO MASTER AT LEAST DAILY

@michieltcs #StandWithUkraine DELAYING INTEGRATION

@michieltcs #StandWithUkraine TRUNK BASED DEVELOPMENT

@michieltcs #StandWithUkraine ONLY COMMIT TO MASTER

MERGING FEATURES?

@michieltcs #StandWithUkraine DECOUPLE DEPLOYMENTS FROM RELEASES

@michieltcs #StandWithUkraine FEATURE TOGGLES

@michieltcs #StandWithUkraine if (FeatureManager.isActive("my-feature")) {  runSomeCodeForThisFeature();  } else {  runSomeOtherCodeNotForThisFeature(); 
} @michieltcs

@michieltcs #StandWithUkraine PULL REQUESTS?

@michieltcs #StandWithUkraine CODE REVIEWS ARE USEFUL

@michieltcs #StandWithUkraine BUT: FLOW DELAY

PAIR PROGRAMMING

@michieltcs #StandWithUkraine CONTINUOUS INLINE CODE REVIEW

MOB PROGRAMMING

@michieltcs #StandWithUkraine PIPELINES

@michieltcs #StandWithUkraine AUTOMATION

@michieltcs #StandWithUkraine AUTOMATION AUTOMATION

@michieltcs #StandWithUkraine AUTOMATION AUTOMATION AUTOMATION

@michieltcs #StandWithUkraine COMPILE CHECKOUT TEST PACKAGE

@michieltcs #StandWithUkraine DEPLOY ACC VERIFY ACC DEPLOY PROD VERIFY PROD

@michieltcs #StandWithUkraine CONTINUOUS TESTING

@michieltcs #StandWithUkraine CONTINUOUS TESTING UNIT TESTS ACCEPTANCE TESTS E2E TESTS
Cost Speed INTEGRATION TESTS

@michieltcs #StandWithUkraine CONTINUOUS TESTING UNIT TESTS ACCEPTANCE TESTS E2E TESTS
Cost Speed Exploratory testing & user feedback Monitoring & alerting INTEGRATION TESTS

#StandWithUkraine @michieltcs "Testing shows the presence, not absence, of bugs."
E D S G E R W. D I J K S T RA

@michieltcs #StandWithUkraine NO TEST SUITE DETECTS EVERY ISSUE

@michieltcs #StandWithUkraine PIPELINE SPEED = KEY

@michieltcs #StandWithUkraine DEPLOYMENTS

ROLLING UPDATE

@michieltcs #StandWithUkraine LOAD BALANCER ROLLING UPDATE SERVICE V1.0 SERVICE V1.0
SERVICE V1.0 @michieltcs

SERVICE V1.0 SERVICE V1.1 @michieltcs

SERVICE V1.1 @michieltcs

@michieltcs #StandWithUkraine pipeline {  stages {  stage('Run tests') {  sh
"gradle check"  }    stage('Build docker image') {  sh "docker build -t jobservice:${env.BUILD_NUMBER} ."  sh "docker push jobservice:${env.BUILD_NUMBER}"  }    stage('Deploy staging') {  sh "ansible-playbook -e BUILD=${env.BUILD_NUMBER}  -i staging deploy.yml"  }    stage('Deploy production') {  sh "ansible-playbook -e BUILD=${env.BUILD_NUMBER}  -i prod deploy.yml"  }  }  PIPELINE AS CODE image: registry.local/runner:latest    stages:  - test  - images  - deploy    phpunit:  stage: test  script:  - bin/phpunit    images:  stage: images  script:  - make images publish  only:  - master    deploy:  stage: deploy  script:  - make deploy  only:  - master

@michieltcs #StandWithUkraine FEEDBACK!

@michieltcs #StandWithUkraine DEPLOYING

@michieltcs #StandWithUkraine ON A FRIDAY

@michieltcs #StandWithUkraine YOU CAN DO IT TOO!

@michieltcs #StandWithUkraine THANK YOU FOR LISTENING! @michieltcs / [email protected] /
@[email protected] www.michielrook.nl

I deploy on Fridays (and maybe you should too) ...

I deploy on Fridays (and maybe you should too) (ConFoo 2024)

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