DEPLOYMENT PIPELINE FOR DATABASES Eduardo Piairo @EdPiairo #WinOps Azure SQL Database, SQL Server 

ABOUT ME Deployment pipeline for databases @EdPiairo, #WinOps @EdPiairo https://pt.linkedin.com/in/jesuspiairo [email protected] http://www.eduardopiairo.com/ Eduardo Piairo Friend of Redgate Operations Engineer DevOps Porto Founder 

INDEX 1. Deployment pipeline 2. Database challenges 3. Deployment pipeline stages 4. Deployment pipeline scenarios 5. Final thoughts Deployment pipeline for databases @EdPiairo, #WinOps 

PIPELINE DEFINITION In software engineering, a pipeline consists of a chain of processing elements (processes, threads, coroutines, functions, etc.), arranged so that the output of each element is the input of the next. by Wikipedia @ https://en.wikipedia.org/wiki/Pipeline_(software) Deployment pipeline for databases @EdPiairo, #WinOps 

DEPLOYMENT PIPELINE DEFINITION A deployment pipeline should enable collaboration between the various groups involved in delivering software and provide everyone visibility about the flow of changes in the system, together with a thorough audit trail. by Martin Fowler @ https://martinfowler.com/bliki/DeploymentPipeline.html Deployment pipeline for databases @EdPiairo, #WinOps 

DEPLOYMENT PIPELINE STAGES Deployment pipeline for databases Stage 1 – Change description (Source Control) Stage 2 – Change validation (Continuous Integration) Stage 3 – Change implementation (Continuous Delivery) Source Control Continuous Integration Continuous Delivery @EdPiairo, #WinOps 

DATABASE & DEPLOYMENT PIPELINE Deployment pipeline for databases Source Control Continuous Integration Continuous Delivery Database + Application @EdPiairo, #WinOps 

WHAT’S SO SPECIAL ABOUT DATABASES? Deployment pipeline for databases @EdPiairo, #WinOps 

DATABASE CHALLENGES Deployment pipeline for databases • Database and application changes (most of the time) are handled differently • Different deployment pipeline • Synchronization needed • Database is not included (manual work) @EdPiairo, #WinOps 

DATABASE CHALLENGES Deployment pipeline for databases • Manual work … • Lack of traceability of database changes (changes history) • It’s the most expensive and risky work type • Prevent CI and CD utilization in their full extent • Promote the fear of changes @EdPiairo, #WinOps 

DATABASE CHALLENGES Deployment pipeline for databases Databases become a bottleneck in an agile delivery process @EdPiairo, #WinOps 

AUTOMATION Deployment pipeline for databases @EdPiairo, #WinOps 

THE VALUE OF AUTOMATION Deployment pipeline for databases • Enable control over database development • Increase speed of response to change • Greater reliability of the release process • Remove/reduce human intervention in the release process From (Re)Learn and forget it to Improve and forget it @EdPiairo, #WinOps 

THE VALUE OF AUTOMATION Deployment pipeline for databases Fearless database changes @EdPiairo, #WinOps 

SOURCE CONTROL Deployment pipeline for databases @EdPiairo, #WinOps SQL Script Fundamental resource 

SOURCE CONTROL Deployment pipeline for databases • First step in your database deployment pipeline • Traceability through change history • SQL as documentation • Shared code-base and shared process • Enforceable standards to reduce conflicts @EdPiairo, #WinOps 

• State based solutions • How the database should be • Migrations based solutions • How the database should change MIGRATIONS VS STATE Deployment pipeline for databases SQL Source Control @EdPiairo, #WinOps Migration Migration State Delta 

SCRIPTING GUIDELINES Deployment pipeline for databases • One script, one operation type, one object (small batches) • Merge conflicts management • Patterns identification • File system scripts history search @EdPiairo, #WinOps 

CONTINOUS INTEGRATION Deployment pipeline for databases • Integrate and validate changes • Tests: Unit, Integration • Small batches, less risk • Considerations: • What should be tested? And When? • Can the application help on this? @EdPiairo, #WinOps 

CONTINUOUS DELIVERY Deployment pipeline for databases • Delivering change(s) in the target environment • Considerations • Downtime • Time to recover • Small batches – low risk • Affected applications @EdPiairo, #WinOps 

FAILED DEPLOYMENT Deployment pipeline for databases • Rollback/roll forward scripts • Very fast • Please, do not make mistakes • It’s like working backwards • Backups (before deploy) • Safer but slower • Keep databases small • Avoid share databases between applications @EdPiairo, #WinOps 

SCENARIO #1 Deployment pipeline for databases Source Control Continuous Integration Continuous Delivery APP DB @EdPiairo, #WinOps • Independent deployment pipelines • High need of synchronization between DBA and development team 

SCENARIO #2 Deployment pipeline for databases Source Control Continuous Integration Continuous Delivery APP DB @EdPiairo, #WinOps • Different code repositories • Independent CI process • The contact point will be the deployment moment 

SCENARIO #3 Deployment pipeline for databases Source Control Continuous Integration Continuous Delivery APP DB @EdPiairo, #WinOps • Different code repositories • Connected/dependent CI process 

SCENARIO #4 Deployment pipeline for databases Source Control Continuous Integration Continuous Delivery APP DB @EdPiairo, #WinOps • Share the some code repository, CI process and CD process • No need of synchronization • Promotes learning within teams (database code reviews) 

DEMO Deployment pipeline for databases @EdPiairo, #WinOps 

MY DEPLOYMENT PIPELINE DEFINITION Pipeline: Cultural and technical tool for managing changes in the software development process (should contemplate databases, applications and infrastructure). by me ;) Show me your pipeline and I will tell you the way you work! Deployment pipeline for databases @EdPiairo, #WinOps 

DEVOPS AND DATABASES Deployment pipeline for databases • DevOps way • Increase flow visibility • Increase feedback • Increase knowledge base @EdPiairo, #WinOps 

READING MATERIAL Deployment pipeline for databases @EdPiairo, #WinOps 

Q&A Deployment pipeline for databases @EdPiairo, #WinOps @EdPiairo https://pt.linkedin.com/in/jesuspiairo [email protected] http://www.eduardopiairo.com/