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01-moving-existing-apps.md
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README.md

README.md

Scenario Index

Monoliths to Microservices: App Transformation Hands-on Workshop

These documents contains a complete set of instructions for running the workshop, split into different scenarios. You can use these documents as a companion as you progress through the scenarios, but keep in mind that some of the links in this document may not work as they will be specific to your online environment. You will be expected to substitute your own values for the following URLs:

  • $OPENSHIFT_MASTER - When you see this variable, replace it with the value of your own OpenShift master hostname/port, such as https://master.openshift.com:8443 (be sure to include the port!).

  • $ROUTE_SUFFIX - When you see this variable, replace it with the value of your own OpenShift default routing suffix. For example, if you see http://coolstore-dev.$ROUTE_SUFFIX then you would replace this with http://coolstore-dev.apps.mycompany.com assuming your OpenShift cluster uses a default routing suffix of apps.mycompany.com.

Intro

As modern application requirements become more complex, it’s apparent that one runtime, one framework, or one architectural style is no longer a feasible strategy. Organizations must figure out how to manage the complexity of distributed app development with diverse technologies, a lack of skilled resources, and siloed processes.

In this hands-on workshop you’ll learn about:

Prerequisites

You can complete this workshop using either a Linux-based system such as RHEL or CentOS, or Windows 7 or later. Windows users should be aware of the Prequisites and notes for Windows Users to understand how to execute commands and refer to environment variables.

To complete this exercise using your own environment, you'll need to install the following software:

  • Red Hat Container Development Kit - this includes OpenShift and the oc command line utility. Follow the instructions for installing it and be sure you have access to the oc command and can login (e.g. oc login -u developer -p developer). You can also use other versions of OpenShift version 3.7 or later, including OpenShift Origin.

NOTE: When using your own OpenShift cluster, you must run additional setup outlined in the Additional OpenShift Configuration section.

  • JBoss EAP 7.1.0 GA - save the .zip file to your ${HOME} directory (it will be used in the first scenario)
  • OpenJDK 1.8 or later with its bin directory on your $PATH
    • Run java -version and it should be 1.8.x or later
  • Maven 3.3.9 or later
    • Run mvn --version and it should be 3.3.9 or later
  • Git 2.7.2 or later
    • Run git --version and it should be 2.7.2 or later
  • Various common Linux developer utilities (unzip, curl, tree, etc)
  • A text editor or IDE for editing code
  • Red Hat Application Migration Toolkit 4.0.0.Beta4. Download and unzip into the ${HOME}/rhamt-cli-4.0.0.Beta4 directory (you can install it elsewhere, but you'll need to specify the path when running the tool during the first lab).
  • A copy of the source code for exercises at ${HOME}/projects (see below)
    • You can open the project(s) in your favorite IDE for editing as needed.

Source code for exercises

The source code required for the exercises in this guide is in a Git repository on github.com. To use this source code, you must clone the repository into your $HOME/projects directory.

For example, the following command will clone the source code into the appropriate directory for use with the guide:

git clone https://github.com/RedHat-Middleware-Workshops/modernize-apps-labs $HOME/projects

There is also a solution branch in this repository, which refers to the source code of the solution for each exercise. To access the solution, you can use git checkout solution. Be sure to switch back to the master branch when done viewing the solution using git checkout master.

References to /root, ~ and $HOME

In various places throughout the exercises, commands are run using paths that refer to /root and ~ and $HOME - this directory is the user's home directory and will be different, depending on your OS and referred to as %USER_HOME% on Windows. You'll need to take care to replace the paths appropriately if you've installed the tools and source code in somewhere other than ${HOME} and be sure to replace /root/, $HOME or ~ with %USER_HOME% as needed on Windows.

Additional OpenShift Configuration

This lab makes use of OpenShift features and Linux container images available on the Red Hat Container Catalog and Docker Hub. To install and configure OpenShift to use them, run the following commands:

oc login -u system:admin # login as cluster admin

# Add admin privileges for admin and developer
oc adm policy add-role-to-user system:image-puller system:anonymous
oc adm policy add-cluster-role-to-user cluster-admin admin
oc adm policy add-cluster-role-to-user sudoer developer

# Import jenkins images and re-tag for 3.7
oc import-image jenkins:v3.7 --from='registry.access.redhat.com/openshift3/jenkins-2-rhel7:v3.7' --confirm -n openshift
oc export template jenkins-persistent -n openshift -o json | sed 's/jenkins:latest/jenkins:v3.7/g' | oc replace -f - -n openshift
oc export template jenkins-ephemeral -n openshift -o json | sed 's/jenkins:latest/jenkins:v3.7/g' | oc replace -f - -n openshift

# import Monolith templates and JBoss Imagestreams
oc create -n openshift -f https://raw.githubusercontent.com/openshift/openshift-ansible/release-3.9/roles/openshift_examples/files/examples/v3.9/xpaas-streams/jboss-image-streams.json
oc create -n openshift -f https://raw.githubusercontent.com/RedHat-Middleware-Workshops/modernize-apps-labs/master/monolith/src/main/openshift/template-binary.json
oc create -n openshift -f https://raw.githubusercontent.com/RedHat-Middleware-Workshops/modernize-apps-labs/master/monolith/src/main/openshift/template-prod.json

# Disable namespace ownership for router
oc env dc/router ROUTER_DISABLE_NAMESPACE_OWNERSHIP_CHECK=true -n default

echo "Importing images" 
for is in {"registry.access.redhat.com/jboss-eap-7/eap70-openshift","registry.access.redhat.com/rhscl/postgresql-94-rhel7","registry.access.redhat.com/redhat-openjdk-18/openjdk18-openshift"}
do 
  oc import-image $is --all --confirm --as=system:admin 
done