The Road to Continuous Deployment: a case study (keynote at DevOpsPro Moscow 2017)

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THE ROAD TO CONTINUOUS DEPLOYMENT - A CASE STUDY MICHIEL ROOK @michieltcs

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▸ Developer, consultant, trainer, speaker ▸ @michieltcs

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SAY MICROSERVICES ONE MORE TIME

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WORKED FINE IN DEV OPS PROBLEM NOW

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DEVOPS

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DEVSECOPS

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DEVSECQAOPS

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DEVSECQABIZOPS

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DEVSECQABIZNETOPS

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DEVSECQABIZSYSNETOPS

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DEVTESTSECQABIZSYSNETOPS

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STORY TIME

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@michieltcs

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@michieltcs Large aging monolith

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@michieltcs Large aging monolith Generates income

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@michieltcs Large aging monolith Slow & complex Generates income

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@michieltcs Large aging monolith Slow & complex Generates income Technical debt

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@michieltcs

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@michieltcs Manual releases

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@michieltcs Manual releases Fragile tests

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@michieltcs Manual releases Frequent issues Fragile tests

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@michieltcs Manual releases Frequent issues Fragile tests Low velocity

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GOALS @michieltcs

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GOALS IMPROVE QUALITY 1 @michieltcs

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GOALS IMPROVE QUALITY REDUCE TIME TO MARKET 1 2 @michieltcs

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REFACTOR? REBUILD?

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APPROACH ▸ API ﬁrst ▸ Services per domain object (job, jobseeker, ...) ▸ Migrate individual pages @michieltcs

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ORIGINAL MONOLITH DB @michieltcs

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ORIGINAL MONOLITH PROXY SERVICE ORIGINAL MONOLITH DB DB DB @michieltcs

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ORIGINAL MONOLITH PROXY SERVICE ORIGINAL MONOLITH ORIGINAL MONOLITH SERVICE SERVICE SERVICE PROXY DB DB DB DB DB DB @michieltcs

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ARCHITECTURE FRONTENDS ARE SERVICES @michieltcs

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ARCHITECTURE FRONTENDS ARE SERVICES SERVICES BEHIND LOAD BALANCERS @michieltcs

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ARCHITECTURE FRONTENDS ARE SERVICES SERVICES BEHIND LOAD BALANCERS SERVICES IN CONTAINERS @michieltcs

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IMPROVING

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CONTINUOUS EVERYTHING

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DEV BUILD / TEST CONTINUOUS INTEGRATION @michieltcs

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DEV BUILD / TEST ACCEPTANCE PRODUCTION CONTINUOUS DELIVERY @michieltcs

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DEV BUILD / TEST STAGING / ACCEPTANCE PRODUCTION CONTINUOUS DEPLOYMENT @michieltcs

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EVERY COMMIT GOES TO PRODUCTION

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IF IT HURTS DO IT MORE OFTEN

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SMALL STEPS @michieltcs

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SMALL STEPS EARLY FEEDBACK @michieltcs

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SMALL STEPS EARLY FEEDBACK REDUCE TIME TO RECOVER @michieltcs

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SMALL STEPS EXPERIMENTS! EARLY FEEDBACK REDUCE TIME TO RECOVER @michieltcs

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ONLY COMMIT TO MASTER

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NO BRANCHES

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NO BRANCHES REALLY.

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DELAYING INTEGRATION

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CONFLICTS

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FEATURE TOGGLES

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DECOUPLE DEPLOYMENTS  FROM RELEASES

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@michieltcs

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FEATURE TOGGLE DEBT

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CODE REVIEWS?

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PAIR PROGRAMMING

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CONTINUOUS  INLINE CODE REVIEW

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BUILD PIPELINE

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CONNECT THE DOTS

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AUTOMATE REPEATABLE THINGS

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CONTINUOUS TESTING

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CONFIDENCE

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DEFENSE IN DEPTH UNIT TESTS INTEGRATION  TESTS ACCEPTANCE  TESTS UI TESTS @michieltcs

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DEFENSE IN DEPTH UNIT TESTS INTEGRATION  TESTS ACCEPTANCE UI TESTS @Test  public void jobCannotBeFound() {  when(jobRepository.getById(EXPECTED_JOB_ID))  .thenReturn(null);    JobService jobService = new JobService(jobRepository);    assertNull(jobService.getById(EXPECTED_JOB_ID));  verify(jobRepository).getById(EXPECTED_JOB_ID);  } @michieltcs

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DEFENSE IN DEPTH UNIT TESTS INTEGRATION  TESTS ACCEPTANCE  TESTS UI TESTS @Test  public void shouldFindJob() {  expectedJob = loadFixture('active_job.yml');  actualJob = repository.getById(expectedJob.getId());    assertThat(actualJob, isA(Job.class));  assertEquals(expectedJob.getId(), actualJob.getId());  } @michieltcs

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DEFENSE IN DEPTH UNIT TESTS INTEGRATION  TESTS ACCEPTANCE  TESTS UI TESTS Scenario: Link to related job  Given a job exists  And there are related jobs available  When that job is viewed  Then a list of related jobs is shown  And each related job links to the detail page of the related job @michieltcs

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DEFENSE IN DEPTH UNIT TESTS INTEGRATION  TESTS ACCEPTANCE  TESTS UI TESTS @michieltcs

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UNIT TESTS INTEGRATION TESTS ACCEPTANCE TESTS UI TESTS SMOKE  TESTS Cost Speed Exploratory  testing Monitoring @michieltcs

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GOOD ENOUGH

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PIPELINE SPEED = KEY

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DEPLOYMENT

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ROLLING UPDATE

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

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

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

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

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

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

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

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

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PIPELINE AS CODE node {  stage('Run tests') {  sh "phpunit"  sh "behat"  }    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"  }  } @michieltcs

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@michieltcs

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FEEDBACK!

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RESULTS

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@michieltcs Team acceptance

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Feature toggle cap @michieltcs Team acceptance

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Feature toggle cap Business alignment & agility @michieltcs Team acceptance

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Feature toggle cap Business alignment & agility Focus on replacing legacy @michieltcs Team acceptance

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Reduced number of issues 1 @michieltcs

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Reduced number of issues 1 Build time  < 10 min.  (50+ per day) 2 4 @michieltcs

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Reduced number of issues 1 Build time  < 10 min.  (50+ per day) Improved metrics & audience statistics 2 3 @michieltcs

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Reduced number of issues 1 Build time  < 10 min.  (50+ per day) Improved metrics & audience statistics Increased conﬁdence, velocity & fun 2 3 4 @michieltcs

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THANK YOU! @michieltcs / mrook@fourscouts.nl  www.fourscouts.nl  www.michielrook.nl