I tried using Wercker to create and publish a Docker image that launches GlassFish 5.

Use Wercker to create a Docker image of an environment running GlassFish5 on CentOS.

Description

Wercker is a Docker-based CI / CD automation platform.

GlassFish 5 is an application server that is a reference implementation of Java EE 8. Currently, development is underway for the official release, and it has been built and released as a beta version.

I explained below about creating an image of this GlassFish 5 environment built on Docker:

-I made a Dockerfile to start Glassfish 5 using Oracle Java

In the above, the procedure for creating a Docker image is defined in the Dockerfile, and the Docker image is created and published by the Automated Build of Docker Hub.

This time, we will use Wercker to define the procedure for creating a Docker image and publish it to Docker Hub.

Also, in the previous procedure, it was a combination of Oracke Java and Oracle Linux, but this time it will be an environment using CentOS and OpenJDK.

Operation image

Environmental information to be built

Premise

Owning the following accounts:

procedure

1. Get the repository published on GitHub

2. Edit wercker.xml

Change the following part of wercker.xml to your own information.

--USERNAME: DockerHub account name --PASSWORD: DockerHub password --DOCKER_IMAGE_NAME: Image name to publish --DOCKER_IMAGE_TAG: Tags attached to images to be published --DOCKER_IMAGE'S_AUTHOR_NAME: Creator information

- internal/docker-push:
     username: [USERNAME]
     password: [PASSWORD]
     repository: [DOCKER_IMAGE_NAME]
     tag: [DOCKER_IMAGE_TAG]
     author: [DOCKER_IMAGE'S_AUTHOR_NAME]
     cmd: /bin/bash --login

This information can also be set in Wercker as an environment variable without having to write it directly in wercker.xml.

3. Definition of Wercker Application

3.1. Create Application

Select "Create"-> "Application" from the menu at the top of the screen

3.2. Repository settings

Select GitHub or Bitbucket and select the Wercker application repository you manage there.

With it selected, click Use selected repo.

3.3. Access method settings

Leave the default (do not use the SSH key) and click Next Step.

3.4. Public / Private selection

Select whether to make the Wercker application defined here publicly available or private. If you want to publish it, select "Make my app public".

3.5. Build

After transitioning to the Build tab screen, click "Trigger a build now" at the bottom of the screen.

3.6. Definition of environment variables

If you used environment variables in step 2, define them on the ** Environment ** tab. Information that you do not want to disclose, such as passwords, can be hidden.

3.7. Check the build status

You can check the build status in real time with the Build tag.

4. Obtaining and using images from Docker Hub

If the build is successful with Wercker, it will be published to DockerHub with the defined image name. From here, do docker pull to use the image.

5. Start the Docker container

The Docker Hub image I publish launches like this:

docker run -it --rm -p 4848:4848 -p 8080:8080 shinyay/centos7-openjdk8-glassfish5

When you start it, the startup shell ** start-domain.sh ** is placed in the directory immediately after it is started to simplify the startup of GlassFish 5. Doing this launches the default domain (domain1).

[root@4e1fb53e79af ~]# ls
anaconda-ks.cfg  start-domain.sh

[root@4e1fb53e79af ~]# ./start-domain.sh

I will check the startup

[root@4e1fb53e79af ~]# asadmin list-domains
domain1 running
Command list-domains executed successfully.

Public repository

Summary

This time, we are using a single pipeline without considering the workflow. In that pipeline, we even build and publish images. I'm thinking of making this a separate pipeline and creating a pipeline that creates and publishes images of different versions and environments in parallel.

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