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

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@michieltcs #StandWithUkraine DEPLOYING

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@michieltcs #StandWithUkraine ON A FRIDAY

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@michieltcs #StandWithUkraine DEPLOYING?

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@michieltcs #StandWithUkraine ON A FRIDAY??

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@michieltcs #StandWithUkraine

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@michieltcs #StandWithUkraine BUT WHY?

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@michieltcs #StandWithUkraine TRADITION

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@michieltcs #StandWithUkraine FEAR

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@michieltcs #StandWithUkraine RISK

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@michieltcs #StandWithUkraine CONTROL

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@michieltcs #StandWithUkraine CONFIDENCE & TRUST

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@michieltcs #StandWithUkraine TIME TO REPAIR / RECOVER

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@michieltcs #StandWithUkraine ON-CALL STRESS

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@michieltcs #StandWithUkraine SO

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

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@michieltcs #StandWithUkraine I USED TO SAY THAT TOO

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@michieltcs #StandWithUkraine I LIKE MY WEEKENDS

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@michieltcs #StandWithUkraine AND MY EVENINGS

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@michieltcs #StandWithUkraine WHAT ABOUT BUGS?

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@michieltcs #StandWithUkraine WHAT ABOUT 3 PM?

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@michieltcs #StandWithUkraine WHAT ABOUT THURSDAY?

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@michieltcs #StandWithUkraine FRIDAY IS 20% OF THE WEEK

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@michieltcs #StandWithUkraine IMPROVE!

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@michieltcs #StandWithUkraine IF IT HURTS DO IT MORE OFTEN

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@michieltcs #StandWithUkraine FAILURE IS NOT THE OPPOSITE OF SUCCESS

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

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@michieltcs #StandWithUkraine BIG STEPS

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@michieltcs #StandWithUkraine FAIL BIG

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@michieltcs #StandWithUkraine SMALL STEPS

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@michieltcs #StandWithUkraine FAIL SMALL

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@michieltcs #StandWithUkraine MAKE IT EFFORTLESS

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@michieltcs #StandWithUkraine REDUCE RISK

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

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@michieltcs #StandWithUkraine CONTINUOUS EVERYTHING

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@michieltcs #StandWithUkraine

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@michieltcs #StandWithUkraine DELIVERING VALUE TO USERS

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@michieltcs #StandWithUkraine SAFELY & QUICKLY

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@michieltcs #StandWithUkraine IN A SUSTAINABLE WAY

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@michieltcs #StandWithUkraine EASY TO DEPLOY

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@michieltcs #StandWithUkraine EASY TO TEST

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@michieltcs #StandWithUkraine EASY TO INSPECT

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

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@michieltcs #StandWithUkraine CODE IS ALWAYS IN A RELEASABLE STATE

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

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@michieltcs #StandWithUkraine IF YOU CAN DEPLOY ANY TIME

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@michieltcs #StandWithUkraine THEN YOU CAN DEPLOY ON FRIDAY

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@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

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@michieltcs #StandWithUkraine BUT OUR CODE IS OLD

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@michieltcs #StandWithUkraine BUT OUR CODE IS NOT UNDER TEST

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@michieltcs #StandWithUkraine BUT OUR CODE IS IMPOSSIBLE TO CHANGE

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@michieltcs #StandWithUkraine DEALING WITH "LEGACY"

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STRANGLER PATTERN

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@michieltcs #StandWithUkraine ORIGINAL MONOLITH DB @michieltcs

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

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

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BRANCH BY ABSTRACTION

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@michieltcs #StandWithUkraine CLIENT OLD MODULE CLIENT CLIENT @michieltcs

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

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

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

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

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

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@michieltcs #StandWithUkraine CLIENT NEW MODULE CLIENT CLIENT @michieltcs

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ON BRANCHES

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@michieltcs #StandWithUkraine CONFLICTS

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

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@michieltcs #StandWithUkraine

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@michieltcs #StandWithUkraine CONTINUOUS INTEGRATION

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@michieltcs #StandWithUkraine INTEGRATE TO MASTER AT LEAST DAILY

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@michieltcs #StandWithUkraine DELAYING INTEGRATION

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@michieltcs #StandWithUkraine TRUNK BASED DEVELOPMENT

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@michieltcs #StandWithUkraine ONLY COMMIT TO MASTER

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MERGING FEATURES?

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@michieltcs #StandWithUkraine DECOUPLE DEPLOYMENTS FROM RELEASES

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@michieltcs #StandWithUkraine FEATURE TOGGLES

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@michieltcs #StandWithUkraine

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

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@michieltcs #StandWithUkraine PULL REQUESTS?

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@michieltcs #StandWithUkraine CODE REVIEWS ARE USEFUL

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@michieltcs #StandWithUkraine BUT: FLOW DELAY

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PAIR PROGRAMMING

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@michieltcs #StandWithUkraine CONTINUOUS INLINE CODE REVIEW

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MOB PROGRAMMING

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@michieltcs #StandWithUkraine PIPELINES

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@michieltcs #StandWithUkraine AUTOMATION

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@michieltcs #StandWithUkraine AUTOMATION AUTOMATION

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@michieltcs #StandWithUkraine AUTOMATION AUTOMATION AUTOMATION

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@michieltcs #StandWithUkraine COMPILE CHECKOUT TEST PACKAGE

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

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@michieltcs #StandWithUkraine CONTINUOUS TESTING

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

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

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

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@michieltcs #StandWithUkraine NO TEST SUITE DETECTS EVERY ISSUE

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@michieltcs #StandWithUkraine PIPELINE SPEED = KEY

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@michieltcs #StandWithUkraine DEPLOYMENTS

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ROLLING UPDATE

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

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@michieltcs #StandWithUkraine LOAD BALANCER ROLLING UPDATE SERVICE V1.0 SERVICE V1.0 SERVICE V1.0 SERVICE V1.1 @michieltcs

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@michieltcs #StandWithUkraine LOAD BALANCER ROLLING UPDATE SERVICE V1.0 SERVICE V1.1 SERVICE V1.0 SERVICE V1.0 @michieltcs

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@michieltcs #StandWithUkraine LOAD BALANCER ROLLING UPDATE SERVICE V1.0 SERVICE V1.1 SERVICE V1.0 SERVICE V1.1 @michieltcs

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@michieltcs #StandWithUkraine LOAD BALANCER ROLLING UPDATE SERVICE V1.0 SERVICE V1.1 SERVICE V1.1 SERVICE V1.0 @michieltcs

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@michieltcs #StandWithUkraine LOAD BALANCER ROLLING UPDATE SERVICE V1.0 SERVICE V1.1 SERVICE V1.1 SERVICE V1.1 @michieltcs

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@michieltcs #StandWithUkraine LOAD BALANCER ROLLING UPDATE SERVICE V1.1 SERVICE V1.1 SERVICE V1.1 SERVICE V1.0 @michieltcs

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@michieltcs #StandWithUkraine LOAD BALANCER ROLLING UPDATE SERVICE V1.1 SERVICE V1.1 SERVICE V1.1 @michieltcs

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@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

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@michieltcs #StandWithUkraine

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@michieltcs #StandWithUkraine FEEDBACK!

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@michieltcs #StandWithUkraine DEPLOYING

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@michieltcs #StandWithUkraine ON A FRIDAY

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@michieltcs #StandWithUkraine YOU CAN DO IT TOO!

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@michieltcs #StandWithUkraine THANK YOU FOR LISTENING! @michieltcs / michiel@michielrook.nl / @michielrook@mastodon.nl www.michielrook.nl