Container support for Ballerina provides the implementation for the following functionality.
- Package Ballerina programs with Docker using
ballerina dockercommand.
This is available as part of the Ballerina Tools distribution.
Docker is required to build and enable Ballerina Container Support. To install Docker, follow the instructions on the Docker Engine Installation Guide. Make sure
dockercommands can be run without root/admin privileges.
Navigate to the source root and execute the following command.
mvn clean installThis will create a fat JAR file with the dependencies included, inside the target folder.
Add the ballerina-container-support-0.8.1.jar file to bre/lib/ folder in the Ballerina distribution.
create docker images for Ballerina program archives
Usage:
ballerina docker <package-name> [--tag | -t <image-name>] [--host | -H <docker-hostURL>] --help | -h --yes | -y
Flags:
--tag, -t docker image name. <image-name>:<version>
--yes, -y assume yes for prompts
--host, -H docker Host. http://<ip-address>:<port>
The docker command will detect the Ballerina archive type (main vs service) from the archive file extension provided.
To create a Docker image from a Ballerina package, simply provide the package name as an argument.
$ ./ballerina docker helloWorld.bmz
Build docker image [helloworld:latest] in docker host [localhost]? (y/n): y
Docker image helloworld:latest successfully built.
Use the following command to execute the archive in a container.
docker run --name dirty_bubble -it helloworld:latest
Creating a Docker image for a Ballerina Service.
$ ./ballerina docker helloWorldService.bsz
Build docker image [helloworldservice:latest] in docker host [localhost]? (y/n): y
Docker image helloworldservice:latest successfully built.
Use the following command to start a container.
docker run -p 44558:9090 --name associated_bile -d helloworldservice:latest
Use the following command to inspect the logs.
docker logs associated_bile
Use the following command to retrieve the IP address of the container
docker inspect associated_bile | grep IPAddress
Ballerina service will be running on the following ports.
http://localhost:44558
http://<container-ip>:9090
Make requests using the format [curl -X <http-method> http://localhost:44558/<service-name>]
You can additionally provide a customized image name.
$ ./ballerina docker helloWorld.bmz -t myhelloworld:0.1
Build docker image [myhelloworld:0.1] in docker host [localhost]? (y/n): y
Docker image myhelloworld:0.1 successfully built.
Use the following command to execute the archive in a container.
docker run --name annual_avenue -it myhelloworld:0.1
If the operating system is Windows or Docker daemon is not available on localhost, specify the Docker host as follows:
$ ./ballerina docker helloWorld.bmz -H https://<docker-host>:<docker-port>
Build docker image [helloworld:latest] in docker host [https://<docker-host>:<docker-port>]? (y/n): y
Docker image helloworld:latest successfully built.
Use the following command to execute the archive in a container.
docker run --name foolish_bronze -it helloworld:latest
The Docker distribution for Ballerina is available on Docker Hub as ballerinalang/ballerina. To run a Ballerina package using the Ballerina Docker image, simply mount the folder containing the package(s) to /ballerina/files folder inside the container.
# Create a directory and copy the packages needed to be run.
mkdir -p ~/ballerina/packages/
cp mypackage.bmz ~/ballerina/packages/
chmod +r ~/ballerina/packages/mypackage.bmz
# Run container with the volume mount
docker run -v ~/ballerina/packages:/ballerina/files -it ballerinalang/ballerina:0.8.1If you are running a Ballerina Service, set the SVC_MODE environment variable to true.
cp mysvcpackage.bsz ~/ballerina/packages/
chmod +r ~/ballerina/packages/mysvcpackage.bsz
docker run -v /tmp/testb:/ballerina/files -e "SVC_MODE=true" -p 9090:9090 -it ballerinalang/ballerina:0.8.1Ballerina Container Support is licensed under Apache License v2.
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