9.5 KiB
Bitnami package for JRuby
What is JRuby?
JRuby is a 100% Java implementation of the Ruby programming language. It is Ruby for the JVM. JRuby provides a complete set of core built-in classes and syntax for the Ruby language.
Overview of JRuby Trademarks: This software listing is packaged by Bitnami. The respective trademarks mentioned in the offering are owned by the respective companies, and use of them does not imply any affiliation or endorsement.
TL;DR
docker run -it --name jruby bitnami/jruby:latest
Docker Compose
curl -sSL https://raw.githubusercontent.com/bitnami/containers/main/bitnami/jruby/docker-compose.yml > docker-compose.yml
docker-compose up -d
Why use Bitnami Images?
- Bitnami closely tracks upstream source changes and promptly publishes new versions of this image using our automated systems.
- With Bitnami images the latest bug fixes and features are available as soon as possible.
- Bitnami containers, virtual machines and cloud images use the same components and configuration approach - making it easy to switch between formats based on your project needs.
- All our images are based on minideb -a minimalist Debian based container image that gives you a small base container image and the familiarity of a leading Linux distribution- or scratch -an explicitly empty image-.
- All Bitnami images available in Docker Hub are signed with Docker Content Trust (DCT). You can use
DOCKER_CONTENT_TRUST=1to verify the integrity of the images. - Bitnami container images are released on a regular basis with the latest distribution packages available.
Looking to use JRuby in production? Try VMware Tanzu Application Catalog, the enterprise edition of Bitnami Application Catalog.
Supported tags and respective Dockerfile links
Learn more about the Bitnami tagging policy and the difference between rolling tags and immutable tags in our documentation page.
You can see the equivalence between the different tags by taking a look at the tags-info.yaml file present in the branch folder, i.e bitnami/ASSET/BRANCH/DISTRO/tags-info.yaml.
Subscribe to project updates by watching the bitnami/containers GitHub repo.
Get this image
The recommended way to get the Bitnami JRuby Docker Image is to pull the prebuilt image from the Docker Hub Registry.
docker pull bitnami/jruby:latest
To use a specific version, you can pull a versioned tag. You can view the list of available versions in the Docker Hub Registry.
docker pull bitnami/jruby:[TAG]
If you wish, you can also build the image yourself by cloning the repository, changing to the directory containing the Dockerfile and executing the docker build command. Remember to replace the APP, VERSION and OPERATING-SYSTEM path placeholders in the example command below with the correct values.
git clone https://github.com/bitnami/containers.git
cd bitnami/APP/VERSION/OPERATING-SYSTEM
docker build -t bitnami/APP:latest .
Entering the JRuby Interactive Console
By default, running this image will drop you into the JRuby Interactive Console (jirb), where you can interactively test and try things out in JRuby.
docker run -it --name jruby bitnami/jruby:latest
Further Reading:
Configuration
Running your Ruby script
The default work directory for the JRuby image is /app. You can mount a folder from your host here that includes your Ruby script, and run it normally using the ruby command.
docker run -it --name jruby -v /path/to/app:/app bitnami/jruby:latest \
ruby script.rb
Running a Ruby app with gems
If your Ruby app has a Gemfile defining your app's dependencies and start script, you can install the dependencies before running your app.
docker run -it --name jruby -v /path/to/app:/app bitnami/jruby:latest \
sh -c "bundle install && jruby script.rb"
or by modifying the docker-compose.yml file present in this repository:
jruby:
...
command: "sh -c 'bundle install && jruby script.rb'"
volumes:
- .:/app
...
Further Reading:
Accessing a Ruby app running a web server
This image exposes port 3000 in the container, so you should ensure that your web server is binding to port 3000, as well as listening on 0.0.0.0 to accept remote connections from your host.
Below is an example of a Sinatra app listening to remote connections on port 3000:
require 'sinatra'
set :bind, '0.0.0.0'
set :port, 3000
get '/hi' do
"Hello World!"
end
To access your web server from your host machine you can ask Docker to map a random port on your host to port 3000 inside the container.
docker run -it --name jruby -P bitnami/jruby:latest
Run docker port to determine the random port Docker assigned.
$ docker port jruby
3000/tcp -> 0.0.0.0:32769
You can also manually specify the port you want forwarded from your host to the container.
docker run -it --name jruby -p 8080:3000 bitnami/jruby:latest
Access your web server in the browser by navigating to http://localhost:8080.
Connecting to other containers
If you want to connect to your Ruby web server inside another container, you can use Docker networking to create a network and attach all the containers to that network.
Serving your Ruby app through an nginx frontend
We may want to make our Ruby web server only accessible via an nginx web server. Doing so will allow us to setup more complex configuration, serve static assets using nginx, load balance to different Ruby instances, etc.
Step 1: Create a network
docker network create app-tier --driver bridge
or using Docker Compose:
version: '2'
networks:
app-tier:
driver: bridge
Step 2: Create a virtual host
Let's create an nginx virtual host to reverse proxy to our JRuby container.
server {
listen 0.0.0.0:80;
server_name yourapp.com;
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header HOST $http_host;
proxy_set_header X-NginX-Proxy true;
# proxy_pass http://[your_jruby_container_link_alias]:3000;
proxy_pass http://myapp:3000;
proxy_redirect off;
}
}
Notice we've substituted the link alias name myapp, we will use the same name when creating the container.
Copy the virtual host above, saving the file somewhere on your host. We will mount it as a volume in our nginx container.
Step 3: Run the JRuby image with a specific name
docker run -it --name myapp \
--network app-tier \
-v /path/to/app:/app \
bitnami/jruby:latest jruby script.rb
or using Docker Compose:
version: '2'
myapp:
image: bitnami/jruby:latest
command: jruby script.rb
networks:
- app-tier
volumes:
- .:/app
Step 4: Run the nginx image
docker run -it \
-v /path/to/vhost.conf:/bitnami/nginx/conf/vhosts/yourapp.conf \
--network app-tier \
bitnami/nginx:latest
or using Docker Compose:
version: '2'
nginx:
image: bitnami/nginx:latest
networks:
- app-tier
volumes:
- /path/to/vhost.conf:/bitnami/nginx/conf/vhosts/yourapp.conf
Maintenance
Upgrade this image
Bitnami provides up-to-date versions of JRuby, including security patches, soon after they are made upstream. We recommend that you follow these steps to upgrade your container.
Step 1: Get the updated image
docker pull bitnami/jruby:latest
Step 2: Stop the running container
Stop the currently running container using the command
docker stop jruby
Step 3: Remove the currently running container
docker-compose rm -v jruby
Step 4: Run the new image
Re-create your container from the new image.
docker run --name jruby bitnami/jruby:latest
or using Docker Compose:
docker-compose up ruby
Contributing
We'd love for you to contribute to this container. You can request new features by creating an issue or submitting a pull request with your contribution.
Issues
If you encountered a problem running this container, you can file an issue. For us to provide better support, be sure to fill the issue template.
License
Copyright © 2023 VMware, Inc.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.