The document discusses deploying Spring Boot applications to Open Liberty. It begins with an introduction of the presenters, Michael Thompson and Thomas Watson. It then discusses how Spring Boot applications are typically deployed as WAR files, but this has some disadvantages. The document promotes deploying Spring Boot applications to Open Liberty as executable JAR files instead of WAR files. It introduces the Open Liberty Boost plugin, which can package a Spring Boot application with Liberty as a single executable JAR. Finally, it briefly discusses building Docker images for Spring Boot applications and the large file sizes that can result from including the entire application and dependencies in a single layer.

1. WebSphere on Pivotal Cloud Foundry
Michael Thompson @barecode
Thomas Watson @TomWatson5150

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Who We Are

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Michael Thompson
Senior Developer & Offering Manager
IBM at Austin, TX
3
Thomas Watson
Senior Developer & Spec Lead
IBM at Austin, TX

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We’re Going To Do Some Roleplay

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Michael Thompson
Senior Developer & Offering Manager
IBM at Austin, TX
5
Thomas Watson
Senior Developer & Spec Lead
IBM at Austin, TX

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Please, Interrupt Us.
We Love Questions

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Deploying Spring Boot Apps

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We Love Spring Boot

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What Do You Love About It?

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Get Up And Running Quickly

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Build Apps That “Just Run”

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Minimal To No Configuration

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We Get It, Spring Boot Is Great …

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Did You Know Open Liberty
Supports Spring Boot Applications?

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Spring Boot WAR
15
<packaging>war</packaging>
https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#howto-create-a-deployable-war-file
@SpringBootApplication
public class Application extends SpringBootServletInitializer {
protected SpringApplicationBuilder
configure(SpringApplicationBuilder application) {
return application.sources(Application.class);
}
public static void main(String[] args) throws Exception {
SpringApplication.run(Application.class, args);
}
}

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Executable WAR
16
Spring Libs.Other LibsApplication
java -jar myapp.war OR
Liberty
deploy

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I Don’t Like WARs

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Why Not?

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WARs Suck

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Requires Server Configuration

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No WebFlux Support

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I Like Serverless!

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Let’s Forget The Elephant …
For Now

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Let’s Try This Again:
Did You Know Open Liberty
Supports Spring Boot Applications?

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Make JAR Not WAR

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Executable FAT JARs
26
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>

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Spring Libs
Executable FAT JARs
27
mvn package
Tomcat .
Other Libs
Application
java -jar myapp.jar

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Spring Libs
Executable FAT JARs
28
Tomcat .
Other Libs
Application
JAR
Liberty
deploy
No Limits – Uses your Spring Boot Config! WebFlux is
Supported.

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Demo 1
Deploy Spring Boot JAR To
Liberty
https://github.com/barecode/spring-petclinic/blob/master/Demo-
SpringOne2018.md

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Are You Putting The Server
Back In Serverless?

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Was The Server Ever REALLY Gone?

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Maybe ... But Spring Boot
Allows Me To Forget

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Enter Open Liberty Boost
https://github.com/OpenLiberty/boost-maven

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Boost Your Spring Boot App
Simplify the use of Liberty for “serverless” applications
34
https://github.com/OpenLiberty/boost-maven
<plugin>
<groupId>io.openliberty.boost</groupId>
<artifactId>boost-maven-plugin</artifactId>
<version>0.1</version>
</plugin>

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Spring Libs
Other Libs
Application
Boost Your Spring Boot App
Package Liberty + Spring Boot App in a familiar Executable JAR
35
https://github.com/OpenLiberty/boost-maven
mvn package boost:package
Liberty

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Boost Your Spring Boot App
36
https://github.com/OpenLiberty/boost-maven
<plugin>
<!-- boost plugin -->
<executions>
<execution>
<goals>
<goal>package</goal>
</goals>
</execution>
</executions>
</plugin>
mvn package
Spring Libs
Other Libs
Application
Liberty
java -jar myapp.jar

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Demo 2
https://github.com/barecode/spring-petclinic/blob/master/Demo-
SpringOne2018.md
Boost Your Spring Boot App
With Open Liberty

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We Use Docker

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We Love Docker

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What Can You Do For Me?

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Spring Boot and Docker
41
FROM openjdk:8-jdk-alpine
VOLUME /tmp
ARG JAR_FILE
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java",
"-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

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Simple.
docker build …
Done.

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Yes … But Look At
Your Docker Layers

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The Application Layer
Is Pretty FAT
~15 MbSpring Libs
Tomcat .
Other Libs
Application

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Simple Hello World
App Has 15 MB
Docker Layer?!
~15 MbSpring Libs
Tomcat .
Other Libs
Application

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Oh Well, So What?

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How Often Do You
Update Your App?

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All The Time,
We LOVE DevOps
Also

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A Simple Update
Requires An Update To
That FAT App Layer Each
Time

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Big Layers Increase
Deployment Cost

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Enter Open Liberty Boost
https://openliberty.io/blog/2018/09/12/build-and-push-spring-boot-docker-images.html

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Boost Your Application Layer
Simplify the use of Docker for “serverless” applications
52
<plugin>
<groupId>io.openliberty.boost</groupId>
<artifactId>boost-maven-plugin</artifactId>
<version>0.1</version>
</plugin>
https://openliberty.io/blog/2018/09/12/build-and-push-spring-boot-docker-images.html

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Boost Your Application Layer
Layer the Docker image for DevOps
53
mvn package boost:docker-build
~15 Mb
< 1 MbApplication
Spring Libs
Other Libs
Liberty
https://openliberty.io/blog/2018/09/12/build-and-push-spring-boot-docker-images.html

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Boost Your Application Layer
54
<plugin>
<!-- boost plugin -->
<executions>
<execution>
<goals>
<goal>docker-build</goal>
</goals>
</execution>
</executions>
</plugin>
mvn package
Application
Spring Libs
Other Libs
Liberty
https://openliberty.io/blog/2018/09/12/build-and-push-spring-boot-docker-images.html

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Demo 3
https://github.com/barecode/spring-petclinic/blob/master/Demo-
SpringOne2018.md
DevOps Layering Done Easy

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Role Swap!

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I Thought This Was Cloud Talk

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What Cloud Do You Use?

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Cloud Foundry Of Course!

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We Love Buildpacks

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Did You Know Liberty Has A Buildpack?

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Liberty Buildpack
62
applications:
- instances: 1
name: liberty-app
buildpack: liberty-for-java
path: ./target/liberty-app(.war|.ear)
manifest.yml
https://github.com/cloudfoundry/ibm-websphere-liberty- buildpack

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Liberty Buildpack
63
cf push
Liberty
Application
Very simple
• Default server config
• Service auto-wiring
• Works in most cases
Push .war/.ear
https://github.com/cloudfoundry/ibm-websphere-liberty- buildpack

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Liberty Buildpack
64
cd …/myServer
cf push
Application
Liberty
Push server directory
Customizable server config
• Still auto-wired
https://github.com/cloudfoundry/ibm-websphere-liberty- buildpack

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Liberty Buildpack
65
package myServer
cf push myServer.zip
Application
Liberty
Push server package
Highly customizable
• Customize server config
• Shared resources, user
features, etc.
• Still auto-wired
https://github.com/cloudfoundry/ibm-websphere-liberty- buildpack

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Liberty Buildpack
66
cf push myApp.jar
Push Spring Boot w/ embedded Liberty
Spring Libs
Other Libs
Application
Liberty
Under Construction!
We’re updating Liberty & the
buildpack to support this officially
https://github.com/cloudfoundry/ibm-websphere-liberty- buildpack

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Demo 4
https://github.com/barecode/spring-petclinic/blob/master/Demo-
SpringOne2018.md
cf push

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What About That Docker Stuff?

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I’m Glad You Asked! :)

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Deploy The Docker Image
To
Pivotal Container Service
(Or Any *KS)

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Boost Your Application Layer
Layer the Docker image for DevOps
Save Your Docker Registry!
• Up to 30% Build Time Reduction
• Up to 90% Deployment Time Reduction
• Up to 99% Registry Space Reduction
71
~15 Mb
< 1 MbApplication
Spring Libs
Other Libs
Liberty
https://openliberty.io/blog/2018/09/12/build-and-push-spring-boot-docker-images.html

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Demo 5
https://github.com/barecode/spring-petclinic/blob/master/Demo-
SpringOne2018.md
docker push

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As We Said:
We Love Spring Boot

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Spring Boot With Tomcat + OpenJDK
Are Tried And True

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We Love OpenJDK Too

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What If You Could Get A
Better JVM For OpenJDK?

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What’s Wrong With OpenJDK?

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In The Cloud
More Resources = More $$$

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Small Footprint & Faster Start-up
= Less $$$

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More Throughput
= Less $$$

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Sounds Nice… But How?

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Eclipse OpenJ9 Is Optimized For Cloud

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Aggressive Focus On Memory Footprint

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Petclinic Uses 2/3 LESS Memory
With OpenJ9

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Replace Your JVM With OpenJ9

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Build with OpenJDK + Eclipse OpenJ9
86
Footprint is 60% smaller with OpenJ9
Hotspot OpenJ9 OpenJ9 -Xshareclasses -
Xquickstart
Hotspot OpenJ9 OpenJ9 -Xshareclasses -Xquickstart
Hotspot OpenJ9 OpenJ9 -Xshareclasses -
Xquickstart
Hotspot OpenJ9 OpenJ9 -Xshareclasses -Xquickstart
Startup time is 30% faster with OpenJ9 –Xshareclasses -Xquickstart
https://adoptopenjdk.net/?variant=openjdk8-openj9http://www.eclipse.org/openj9
0 200 400 600 800 1000 1200 1400 1600
Throughput(transactions/sec)
Time (sec)
OpenJDK9 with HotSpot
OpenJDK9 with OpenJ9
OpenJDK9 with OpenJ9 w/AOT -Xtune:virtualized
Achieve peak throughput 70% faster with OpenJ9

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Are You Going To Sell Me On Liberty Now?

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Well, This Is A WebSphere Talk ;)

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Liberty
“Tiny But Powerful” ™
™ Steve Poole :P

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Inc. 90
The Five W’s Of Open Liberty

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Open Liberty
Who?
An IBM Open Source
Project

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Open Liberty
What?
The Foundation Of WebSphere
Out-of-the-box Java EE, MicroProfile & Spring

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Open Liberty
What?
The Foundation Of WebSphere
Out-of-the-box Java EE, MicroProfile & Spring
Where?
https://openliberty.io/

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Open Liberty
What?
The Foundation Of WebSphere
Out-of-the-box Java EE, MicroProfile & Spring
Why?
Security
Performance
Auto-tuning Thread Pool & Connection Pool
Zero Migration
IBM Support
Where?
https://openliberty.io/

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Open Liberty
What?
The Foundation Of WebSphere
Out-of-the-box Java EE, MicroProfile & Spring
Why?
Security
Performance
Auto-tuning Thread Pool & Connection Pool
Zero Migration
IBM Support
Where?
https://openliberty.io/
When?
It’s Free, Get It Now!

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Liberty Loves Spring

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We Want To Make It Easy
For You To Love Liberty

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Liberty ♥ Spring
98
Server first
Spring Boot App .
Open Liberty
UpdateFrequency
Spring Libs. Other Libs
Application
+
Open Liberty
Dual Layer with Liberty & OpenJ9
> mvn package
> mvn boost:docker-build
> docker run
> cp app.jar …/apps
> server run
<feature>springBoot-2.0</feature>
<feature>servlet-4.0</feature>
<springBootApplication location=“app.jar” />
Easy, opinionated Docker
Build Docker images with
your preferred build tool
Meet you where you are
Use Liberty in your existing
Spring developer experience
Spring Boot App .
Open Liberty
♥
Spring Boot and Liberty, everywhere
> cf push

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Liberty …
Now With More Cup Holders!

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After All, A Cup Is A Container, Right? :)

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We Want To Make It Easy
For You To Love Spring Boot & Docker

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Boost Your Application Layer
Layer the Docker image for DevOps
Performance for the Cloud
• Open Liberty
• OpenJDK + Eclipse OpenJ9
Save Your Docker Registry!
• Up to 30% Build Time Reduction
• Up to 90% Deployment Time Reduction
• Up to 99% Registry Space Reduction
102
~15 Mb
< 1 MbApplication
Spring Libs
Other Libs
Liberty
https://openliberty.io/blog/2018/09/12/build-and-push-spring-boot-docker-images.html

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We Want Your Feedback

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Tell Us How We’re Doing!

105. > Stay Connected.
https://gitter.im/OpenLiberty/boost
@barecode @TomWatson5150 @openlibertyio
#springone@s1p
Take the QuickLab - we want your feedback!
https://github.com/barecode/Boost-Spring-Boot