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DevOps, Continuous Integration & Automated Testing: Rule Them All

SAMIR BEHARASolution ArchitectEBSCO, Birmingham, AL

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DATABASE RELEASE?

EMAIL THE SCRIPTS & I WILL EXECUTE IT

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Database Lifecycle Management Overview

SHIFT LEFT – Catch issues as early as possible

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Automated CI/CD Pipelines

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Azure DevOps

An end-to-end solution for organizations looking for an enterprise-grade toolchain

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Azure Pipelines and GitHub Integration

Cloud-hosted pipelines for Linux, Windows and macOS, with unlimited minutes for open source

Any language, any platform, any cloud

Extensible

Containers and Kubernetes

Best-in-class for open source

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Microservices CI/CD Ecosystem

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Test Driven Development

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Testing your Microservices Applications

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Continuous Inspection of Code Quality

Identify Code Smells, Bugs and Vulnerabilities

Analyzers for 20+ Programming Languages

DevOps Integration

Reject Check-in when Quality Gate not met

Static Code Analysis - SonarQube

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Release Pipeline

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Continuous Integration

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Continuous Delivery

Continuous Deployment

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Potential alternative to maintaining multiple feature branches.

Reduces the need for constant branching and merging.

Enables releases with unfinished features at no risk.

Feature Flags

Scenario: Incremental feature deployment

PRODMOCKQADEV

Feature A

Feature B.1

Feature B.2

Feature A

Feature B

FEATURE FLAGS – DEPLOYMENT SCENARIO 1

Scenario: One passes QA and one fails QA

PRODMOCKQADEV

Feature A

Feature B

Feature A

Feature B

Bug Created

Feature A Bug Fix

Feature A Bug Fix

Even though feature A did not receive QA approval, we can still deliver feature B to the customer. We simply switch off the offending feature and create a new task to fix the bug.

FEATURE FLAGS – DEPLOYMENT SCENARIO 2

Scenario: Comparative Performance Enhancement Testing

PRODMOCKQADEV

Feature A

Feature A

Gather Performance Data: OriginalGather Performance Data: New Feature

< Compare >

FEATURE FLAGS – DEPLOYMENT SCENARIO 3

Scenario: Selectively flipping a feature on need basis in Production

PRODMOCKQADEV

Processing Override

Processing Override

We keep this feature flag in production to act as a toggle switch.

During busy season we turn it for alternative processing.

After busy season, we turn it off and resume normal order processing.

FEATURE FLAGS – DEPLOYMENT SCENARIO 4

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Blue-Green Deployment

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Canary Release

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Dark Release

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Source Control is the system of truth

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Database is the system of truth

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• System of Truth is the Source Code

• Suited for frequent database changes

• Suited for large sized teams

• Source Code contains the current state of the database

• Less control on the migration script

• Complex refactoring might take multiple steps

• System of Truth is the Database

• Suited for infrequent database changes

• Suited for small sized teams

• Have to maintain a long list of migration scripts within the source control

• More fine grain control on the migration script

• Complex refactoring can be handled by a single script

• STATE BASED APPROACH

State Based Approach Migration Based Approach

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Any change to the database schema or

reference data

that was made directly in the database

environment,

outside of the normal automated delivery

pipeline.Ensure that all migrations are idempotent – meaning that running a script more than once has no additional impact.

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Content goes here. Content goes here.✓ Renaming a Column/Table/Stored Procedure/ View/ Function✓ Dropping a Column/Table✓ Remove a Stored Procedure/ View/ Function✓ Moving a Column from one table

✓ Adding a Column/Table/Stored Procedure/ View/ Function

Non-Breaking Database Change

Breaking Database Change

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Expand and Contract Pattern

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VERSION CONTROL

DISCONNECTED DATABASE

DEVELOPMENT

DECLARATIVE APPROACH

DACPAC DEPLOPYMENTS

CODE EDITING EXPERIENCE

SCHEMA & DATA COMPARE

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INCREMENTAL CHANGE

SHIFT LEFTMORE CONTROL ON MIGRATION

SCRIPT

HYBRID APPROACH

PROGRAMMABLE OBJECTS

OFFLINE SCHEMA MODEL

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Flyway is free and open source.

Flyway facilitates the Automatic Deployment of database changes.

Flyway creates a table name ‘schema_version‘ in your database.

Flyway supports number of databases – Oracle, SQL Server, MySQL, PostgreSQL, MariaDB, SQLite, Redshift and more.

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Additional Resources

Continuous Integration with SQL Server Data Tools in Visual Studio 2017

Database Static Code Analysis using SQL Cop

Managing your Technical Debt using SonarQube

Continuous Integration, Continuous Delivery and Continuous Deployment

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Thank You

@samirbehara dotnetvibes.com