Wildfly - CentOS Docker image

This repository contains the source for building various versions of the WildFly application as a reproducible Docker image using source-to-image. The resulting image can be run using Docker.

Versions

WildFly versions currently provided are:

WildFly v8.1 (deprecated)
WildFly v9.0 (deprecated)
WildFly v10.0 (10.0.0 Final)
WildFly v10.1

CentOS versions currently provided are:

CentOS7

Installation

This image is available on DockerHub. To download it, run:

$ docker pull openshift/wildfly-101-centos7

$ docker pull openshift/wildfly-100-centos7

To build a WildFly image from scratch, run:

$ git clone https://github.com/openshift-s2i/s2i-wildfly.git
$ cd s2i-wildfly
$ make build VERSION=10.1

** Note: by omitting the VERSION parameter, the build/test action be performed on all provided versions of WildFly.**

Usage

To build a simple jee application using standalone S2I and then run the resulting image with Docker execute:

$ s2i build git://github.com/bparees/openshift-jee-sample openshift/wildfly-101-centos7 wildflytest
$ docker run -p 8080:8080 wildflytest

Accessing the application:

$ curl 127.0.0.1:8080

Test

This repository also provides a S2I test framework, which launches tests to check functionality of a simple WildFly application built on top of the wildfly image.

CentOS based image

$ cd s2i-wildfly
$ make test VERSION=10.1

Notice: By omitting the VERSION parameter, the build/test action will be performed on all provided versions of WildFly.

Repository organization

<WildFly-version>

Dockerfile

CentOS based Dockerfile

s2i/bin/

This folder contains scripts that are run by S2I:

assemble

Is used to restore the build artifacts from the previous build (in case of
'incremental build'), to install the sources into location from where the
application will be run and prepare the application for deployment (eg.
installing maven dependencies, building java code, etc..).

In addition, the assemble script will distribute artifacts provided in the
application source project into the Wildfly installation:

Wildfly configuration files from the <application source>/cfg are copied
into the wildfly configuration directory.

Pre-built war files from the <application source>/deployments are moved
into the wildfly deployment directory.

Wildfly modules from the <application source>/provided_modules are copied
into the wildfly modules directory.

run

This script is responsible for running the application, by using the
Wildfly application server.

save-artifacts

In order to do an *incremental build* (iow. re-use the build artifacts
from an already built image in a new image), this script is responsible for
archiving those. In this image, this script will archive the
maven dependencies and previously built java class files.

contrib/

This folder contains commonly used modules
- wfbin/
  
  Contains script used to launch wildfly after performing environment variable substitution into the standalone.xml configuration file.
- wfcfg/
  
  Contains the default standalone.xml configuration which can be overriden by applications that provide a standalone.xml in <application_src>/cfg.
- wfmodules/ Contains commonly used modules such as postgres and mysql database drivers.
test/

This folder contains the S2I test framework with a simple JEE application.
- test-app/
  
  A simple Node.JS echo server used for testing purposes by the S2I test framework.
- run
  
  This script runs the S2I test framework.

hack/

Folder containing scripts which are responsible for the build and test actions performed by the Makefile.

Hot Deploy

Hot deploy is enabled by default for all WildFly versions.
To deploy a new version of your web application without restarting, you will need to either rsync or scp your war/ear/rar/jar file to the /wildfly/standalone/deployments directory within your pod.

Image name structure

Structure: openshift/1-2-3

Platform name (lowercase) - wildfly
Platform version(without dots) - 101
Base builder image - centos7

Example: `openshift/wildfly-101-centos7` Environment variables

To set environment variables, you can place them as a key value pair into a .s2i/environment file inside your source code repository.

MAVEN_ARGS

Overrides the default arguments passed to maven during the build process
MAVEN_ARGS_APPEND

This value will be appended to either the default maven arguments, or the value of MAVEN_ARGS if MAVEN_ARGS is set.
MAVEN_OPTS

Contains JVM parameters to maven. Will be appended to JVM arguments that are calculated by the image itself (e.g. heap size), so values provided here will take precedence.
JAVA_GC_OPTS

When set to a non-null value, this value will be passed to the JVM instead of the default garbage collection tuning values defined by the image.
CONTAINER_CORE_LIMIT

When set to a non-null value, the number of parallel garbage collection threads will be set to this value.
USE_JAVA_DIAGNOSTICS

When set to a non-null value, various JVM related diagnostics will be turned on such as verbose garbage collection tracing.
AUTO_DEPLOY_EXPLODED

When set to true, Wildfly will automatically deploy exploded war content. When unset or set to false, a .dodeploy file must be touched to trigger deployment of exploded war content.
MYSQL_DATABASE

If set, WildFly will attempt to define a MySQL datasource based on the assumption you have an OpenShift service named "mysql" defined. It will attempt to reference the following environment variables which are automatically defined if the "mysql" service exists: MYSQL_SERVICE_PORT MYSQL_SERVICE_HOST MYSQL_PASSWORD MYSQL_USER
POSTGRESQL_DATABASE

If set, WildFly will attempt to define a PostgreSQL datasource based on the assumption you have an OpenShift service named "postgresql" defined. It will attempt to reference the following environment variables which are automatically defined if the "postgresql" service exists: POSTGRESQL_SERVICE_PORT POSTGRESQL_SERVICE_HOST POSTGRESQL_PASSWORD POSTGRESQL_USER

Copyright

Released under the Apache License 2.0. See the LICENSE file.

asad-shmoghadam/s2i-wildfly