1.
Continuous DB Changes Delivery
With Liquibase
Presented by Aidas Dragunas

2.
Agenda
• The short overview of Continuous Delivery process
• The overview of Liquibase technology as one of open source
technologies, designed for DB changes migration
• Live demonstration of how Liquibase could be used in Continuous
Delivery process

3.
Continuous Delivery Overview
How to continuously deliver application changes to the
testing and production environment

4.
Deployment automation stages
Commit Code
Perform Unit &
Integration
testing
Deploy to
testing
environment
Perform
Acceptance
testing
Deploy to
production
environment
Continuous Integration
Continuous Delivery
Continuous Deployment

5.
Continuous integration process
3
2
4
CI Server
(Jenkins)
Development team
SCM repository
(GIT, SVN)
1
Notification
Binary repository
(Nexus)

6.
Continuous delivery process
2
5
4
3
CI Server
(Jenkins)
Testing
Environment
Development team
SCM repository
(GIT, SVN)
1
Notification
Binary repository
(Nexus)

7.
Continuous deployment
process
2
4
5
3
7
6
CI Server
(Jenkins)
Testing
Environment
Development team
SCM repository
(GIT, SVN)
1
Stakeholders
Production
Environment
Notification
Notification
Binary repository
(Nexus)

8.
Continuous delivery key notes
• DB changes and web changes are committed into the SCM
repository together
• DB changes are created and stored incrementally
• DB changes are deployed incrementally
• DB changes and web changes are deployed together

9.
Liquibase Overview
Overview of Liquibase - one of DB changes deployment tools

10.
Introduction
• Purpose
• Provide structure to track and
manage DB changes
• Deploy DB changes to the
database
• Main keywords
• Master Changelog
• Incremental Changelog
• Changeset
• Latest version
• 3.4.2 (November 24, 2015)
• License
• Liquibase - Apache 2.0
• Datical DB - Commerce
version of Liquibase
• Principles
• Manage DB changes in small chunks – Changesets
• Store DB changes in Changelog files (preferably one Changeset in one file).
• Use Changelog tables in the DB to track and manage DB changes
deployment process.

11.
Features
• Changeset descripton formats
• XML
• SQL
• JSON
• YAML
• Changeset description types
• Inside Changelog file
• Outside Changelog file
• Changeset types
• DB structure changes
• Methods
• Data changes
• Database types
• Oracle
• PostgreSQL
• SQL Server
• MySQL
• Other
• Additional features
• DB changes file generation
• DB changes rollback
• DB difference generation
• DB documentation
• Plugins
• Ant, Maven, Gradle (third
party provider)
• Spring

12.
Benefits
• Flexible
• Plugins for main deployment engines (Ant, Maven, Gradle)
• Suitable for beginners and for experienced developers
• Abiliy to load data and compile methods
• Ability to rollback changes
• Ability to review changes SQL file
• Ability to generate documentation
• Manually defining the order of changes
• Supports various changelog formats
• Supports the majority of database vendors

13.
Drawbacks
• Sometimes too complex, especially for datasets deployment
• Manually defining the order of changes
• Different plugins features for Gradle, Maven and Ant
• Poorly formated output log
• Change locks happen. When manual lock release should be
performed directly in the database
• Limited by JDBC
• Doesn‘t support Slonik files, so PostgreSQL built-in streaming
replication should be enabled

14.
Liquibase vs Flyway
Feature Liquibase Flyway
Incremental migration x x
Migration SQL preview x
Migration formats XML, SQL, YAML, JSON SQL, Java
Migration order
management strategy
Manual Automatic
Migration rollback x
Repeated change
execution
x
Context based change
deployment
x

15.
Documentation
• http://www.liquibase.org/documentation/index.html
• http://www.datical.com/wp-content/uploads/2013/09/3-
Technical-Brief-Datical-DB.pdf

16.
Continuous Delivery With Liquibase
Demo
How to continuously deliver DB changes to the PostgreSQL
database using Liquibase

17.
Solutions Pie
PostgreSQL
Jenkins/Nexus
Git
Maven/Ant/Gradle
Liquibase
(Changelogs/Changesets)

18.
Changelogs catalog structure
• changes
• change-20151009142310
• change.sql
• change.xml
• change-20151009143745
• ....
• changelog.xml
• datasets
• dataset-0001
• dataset.xml
• dataset-0002
• ....
• changelog.xml
• methods
• changelog.xml
• env
• local.properties
• development.properties
• qa.properties
• production.properties
• gradle
• libs

19.
Live Example

20.
Questions?