Run Azul Zulu in a Docker Container
This section shows how to run Azul Zulu inside a Docker container.
Prerequisites
Install Docker by following the Docker documentation.
Azul Docker images
Azul provides Docker images with Azul Zulu Builds of OpenJDK pre-installed on one of the following operating systems:
OS | Image Name |
---|---|
Ubuntu |
|
Debian |
|
Alpine Linux |
|
CentOS |
|
To pull a specific image, use the corresponding image name in the docker pull
command.
For example, to pull the Alpine Linux image with Azul Zulu JDK 21, run:
docker pull azul/zulu-openjdk-alpine:21
Run Java apps
You can test the Docker image by running the following command in a terminal:
docker run -it --rm azul/zulu-openjdk:21 java -version
The command allocates a terminal and runs java
.
It prints a message similar to this:
openjdk version "21.0.4" 2024-07-16 LTS
OpenJDK Runtime Environment Zulu21.36+17-CA (build 21.0.4+7-LTS)
OpenJDK 64-Bit Server VM Zulu21.36+17-CA (build 21.0.4+7-LTS, mixed mode, sharing)
If you see this message in your terminal, you’ve successfully executed java
inside a container.
The command above simply executes java
.
To run a Java application, you must provide your application classes and resources to the java
command.
You do this by mounting a local directory from the container.
As an example, let’s assume that your application files are located in a single directory.
You would normally run the app by executing java MyApp
in that directory.
Use the -v
option of docker run
to make the directory available inside the container.
The command might look like this:
docker run -it --rm \
-v ${PWD}:/usr/src/project \
-e CLASSPATH=/usr/src/project \
azul/zulu-openjdk:11 java MyApp