Sunday, September 4, 2016

Add a new runtime to a existing app type in WSO2 App Cloud

This blog post explains how you can add a new runtime to a existing app type. Recently WSO2 Carbon team released WSO2 AS 6.0.0 M3 release. I'm gonna explain how we can add this WSO2 AS 6.0.0 M3 as a new runtime of war app type.

Step 1: get a clone of app-cloud code base
git clone https://github.com/wso2/app-cloud


Step 2: Create required docker files
When creating docker files, please refer the existing docker files we have created for other runtimes and get an idea.

You can find the existing docker files here
https://github.com/wso2/app-cloud/tree/master/modules/resources/dockerfiles

You can find the wso2as docker files here. We need to add dockefiles related to WSO2AS 6.0.0 M3 dockerfiles here
https://github.com/wso2/app-cloud/tree/master/modules/resources/dockerfiles/wso2as



dockerfiles/wso2as/base 
This folder contains docker files required to build wso2as base images

dockerfiles/wso2as/default 
This folder contains docker files which require to build a images with wso2as base image and the war file we upload when we do create application.

dockerfiles/wso2as/url 
This folder contains docker files which require to build a images with wso2as base image and the war file we upload via url when we do create application.


Step 3: Database changes required
When adding a new runtime, you will need to update the database schema, following diagram explains the relationships with AC_RUNTIME table.

AC_RUNTIME defines the runtimes
AC_CONTAINER_SPECIFICATIONS defines the container specs we allow in our App Cloud setup
AC_TRANSPORT defines the ports we expose, to end users to access
AC_APP_TYPE defines the app types


Database queries required to add WSO2 AS 6.0.0 M3 runtime

-- add WSO2 AS 6.0.0 M3 runtime to the AC_RUNTIME table
INSERT INTO `AC_RUNTIME` (`id`, `name`, `repo_url`, `image_name`, `tag`, `description`) VALUES
(10, 'Apache Tomcat 8.0.28 / WSO2 Application Server 6.0.0-M3','registry.docker.appfactory.private.wso2.com:5000', 'wso2as', '6.0.0-m3', 'OS:Debian, JAVA Version:8u72');

-- add app type-runtime mapping
INSERT INTO `AC_APP_TYPE_RUNTIME` (`app_type_id`, `runtime_id`) VALUES
(1, 10);

-- add relavent container spec mappings
INSERT INTO `AC_RUNTIME_CONTAINER_SPECIFICATIONS` (`id`, `CON_SPEC_ID`) VALUES
(10, 3),
(10, 4);

-- add relavent transport mappings
INSERT INTO AC_RUNTIME_TRANSPORT (`transport_id`, `runtime_id`) VALUES
(3, 10),
(4, 10);

Step 4: integration above changes to App Cloud
Once you complete the above changes, you can send us a pull request :)


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