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27 août 2023

Get Started with Liberty Runtime in Minutes: Download, Install, and Deploy

Introduction

Liberty runtime is a lightweight Java application server that is ideal for building microservices, modern monolithic applications, and anything in between. It is built on the open source Open Liberty runtime and is compatible with MicroProfile and Jakarta EE standards. It was created by IBM in 2012 as a next-generation application server that accelerates the delivery of cloud-native applications. It offers a fast, dynamic, and easy-to-use Java runtime environment that requires less infrastructure, saves costs, and provides the flexibility to deploy on any cloud.

How to download and install Liberty runtime

There are multiple ways to download and install the Liberty runtime packages. You can choose the method that suits your needs and preferences.

download liberty runtime

Download Zip

ZIP file

If you want to install Liberty runtime from a ZIP file, you can follow these steps:

Download one of the from the IBM website.

Unzip the file to a location of your choice.

Add the wlp/bin folder to your system path.

You can now use the server command to create, start, stop, or manage your Liberty servers.

Maven, Gradle, or Docker

If you are using Maven, Gradle, or Docker as your build tool or container platform, you can also download and install Liberty runtime using them. Here are some examples:

Maven

If you are using Maven, you can add the following dependency to your pom.xml file:

<dependency> <groupId>com.ibm.websphere.appserver.runtime</groupId> <artifactId>wlp-kernel</artifactId> <version>23.0.0.4</version> <type>zip</type> </dependency>

To install additional features with Maven, you can use the .

Gradle

If you are using Gradle, you can add the following dependency to your build.gradle file:

dependencies libertyRuntime group: 'com.ibm.websphere.appserver.runtime', name: 'wlp-kernel', version: '23.0.0.4'

To install additional features with Gradle, you can use the Docker

If you are using Docker, you can pull the Liberty runtime image from the or build your own image using a Dockerfile. Here is an example of a Dockerfile that uses the Liberty runtime image:

FROM open-liberty:23.0.0.4-kernel COPY --chown=1001:0 server.xml /config/ RUN features.sh COPY --chown=1001:0 target/my-app.war /config/dropins/

To build and run the image, you can use the following commands:

docker build -t my-liberty-app . docker run -d -p 9080:9080 -p 9443:9443 my-liberty-app

Eclipse

If you are using Eclipse as your IDE, you can download and install Liberty runtime from within Eclipse using the . You can follow these steps:

How to download liberty runtime for microservices

Download liberty runtime zip file from IBM

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Install WDT from the Eclipse Marketplace or from the IBM Installation Manager.

Create a new Liberty server by right-clicking on the Servers view and selecting New > Server.

Select WebSphere Application Server Liberty and click Next.

Select Install from an archive or a repository and click Next.

Select a Liberty runtime package from the list or browse to a ZIP file and click Next.

Specify a name and location for the Liberty server and click Finish.

Benefits of Liberty runtime

Liberty runtime offers many benefits for Java developers and enterprises. Here are some of them:

Performance and efficiency

Liberty runtime is designed to be fast, lightweight, and scalable. It has a low memory footprint, high throughput, and quick startup time. It can run on any hardware, from laptops to mainframes, and on any operating system, from Windows to Linux. It can also run on any cloud platform, such as IBM Cloud, AWS, Azure, or Google Cloud. Liberty runtime helps you reduce infrastructure costs, optimize resource utilization, and deliver high-performance applications.

Cloud-native and open standards

Liberty runtime is built for cloud-native development. It supports microservices architecture, containerization, DevOps practices, and continuous delivery. It also supports open standards such as MicroProfile and Jakarta EE, which provide common APIs and specifications for developing portable and interoperable Java applications. With Liberty runtime, you can avoid vendor lock-in, leverage existing skills and code, and benefit from the innovation of the open source community.

Developer experience

Liberty runtime provides a great developer experience. It offers tools and features that enhance developer productivity and satisfaction. For example, it has a dynamic configuration that allows you to add or remove features without restarting the server. It also has a zero migration policy that ensures backward compatibility and minimizes migration efforts. It also has a developer mode that enables hot reload, testing, debugging, and live coding. With Liberty runtime, you can focus on writing code rather than managing servers.

Features of Liberty runtime

Liberty runtime has many features that make it a powerful and flexible Java application server. Here are some of them:

Modular structure

Liberty runtime is based on features that enable the required capabilities for applications. Features are modular components that provide specific functionality such as web container, security, database access, messaging, etc. You can choose the features that you need for your application and add or remove them as needed. This way, you can create a customized runtime that suits your application requirements and avoids unnecessary overhead.

Open Liberty and WebSphere Liberty

Liberty runtime has two versions: Open Liberty and WebSphere Liberty. Open Liberty is the open source version of Liberty runtime that is available for free under the Eclipse Public License v1. You can download Open Liberty from .

Jakarta EE, MicroProfile, and Java EE

Liberty runtime supports various standards and specifications for developing Java applications. Jakarta EE is the successor of Java EE that provides a set of APIs for developing enterprise applications such as web services, security, persistence, etc. MicroProfile is a set of specifications that complement Jakarta EE and provide additional features for developing microservices such as fault tolerance, health check, metrics, etc. Java EE is the predecessor of Jakarta EE that provides similar APIs but is no longer maintained by Oracle. Liberty runtime supports all these standards and allows you to develop applications that are portable and interoperable across different platforms and vendors.

Liberty runtime vs Tomcat

Tomcat is another popular Java application server that is widely used by developers and enterprises. How does Liberty runtime compare to Tomcat? Here are some similarities and differences: