Chapter 2. Build and Run a Java Application on the JBoss EAP for OpenShift Image

Create a new project in OpenShift.

A project allows a group of users to organize and manage content separately from other groups. You can create a project in OpenShift using the following command.

oc new-project PROJECT_NAME

$ oc new-project PROJECT_NAME

For example, for the kitchensink quickstart, create a new project named eap-demo using the following command.

oc new-project eap-demo

$ oc new-project eap-demo

Create a service account for this deployment.

Service accounts are API objects that exist within each OpenShift project. You can create a service account using the following command.

oc create serviceaccount SERVICE_ACCOUNT_NAME

$ oc create serviceaccount SERVICE_ACCOUNT_NAME

For example, for the kitchensink quickstart, create a new service account named eap-service-account using the following command.

oc create serviceaccount eap-service-account

$ oc create serviceaccount eap-service-account

Add the view role to the service account.

This enables the service account to view all the resources in the project namespace, which is necessary for managing the cluster. You can add the view role to a service account using the following command.

oc policy add-role-to-user view system:serviceaccount:PROJECT_NAME:SERVICE_ACCOUNT_NAME

$ oc policy add-role-to-user view system:serviceaccount:PROJECT_NAME:SERVICE_ACCOUNT_NAME

For example, for the kitchensink quickstart, add the view role to the service account using the following command.

oc policy add-role-to-user view system:serviceaccount:eap-demo:eap-service-account

$ oc policy add-role-to-user view system:serviceaccount:eap-demo:eap-service-account

Create a keystore.

JBoss EAP for OpenShift requires a keystore to be imported to properly install and configure the image on your OpenShift instance.

You can use the Java keytool command to generate a keystore using the following command.

keytool -genkey -keyalg RSA -alias ALIAS_NAME -keystore KEYSTORE_FILENAME.jks -validity 360 -keysize 2048

$ keytool -genkey -keyalg RSA -alias ALIAS_NAME -keystore KEYSTORE_FILENAME.jks -validity 360 -keysize 2048

For example, for the kitchensink quickstart, use the following command to generate a keystore.

keytool -genkey -keyalg RSA -alias eapdemo-selfsigned -keystore keystore.jks -validity 360 -keysize 2048

$ keytool -genkey -keyalg RSA -alias eapdemo-selfsigned -keystore keystore.jks -validity 360 -keysize 2048

Create a secret from the keystore.

Create a secret from the previously created keystore using the following command.

oc secret new SECRET_NAME KEYSTORE_FILENAME.jks

$ oc secret new SECRET_NAME KEYSTORE_FILENAME.jks

For example, for the kitchensink quickstart, use the following command to create a secret.

oc secrets new eap-app-secret keystore.jks

$ oc secrets new eap-app-secret keystore.jks

Add the secret to the service account.

Add the secret to your project’s service accoung using the following command.

oc secrets link SERVICE_ACCOUNT_NAME SECRET_NAME

$ oc secrets link SERVICE_ACCOUNT_NAME SECRET_NAME

For example, for the kitchensink quickstart, use the following command to add the previously created eap-app-secret secret to the eap-service-account service account.

oc secrets link eap-service-account eap-app-secret

$ oc secrets link eap-service-account eap-app-secret

Create a new OpenShift application using the JBoss EAP for OpenShift image and your Java application’s source code.

Using the following command, specify the image stream and the path to the application source code.

oc new-app IMAGE_STREAM~PATH_TO_SOURCE_CODE

$ oc new-app IMAGE_STREAM~PATH_TO_SOURCE_CODE

For example, for the kitchensink quickstart, use the following command to use the JBoss EAP image stream with the kitchensink source code on GitHub.

oc new-app jboss-eap70-openshift~https://github.com/jboss-developer/jboss-eap-quickstarts.git#7.0.0.GA --context-dir=kitchensink

$ oc new-app jboss-eap70-openshift~https://github.com/jboss-developer/jboss-eap-quickstarts.git#7.0.0.GA --context-dir=kitchensink

Retrieve the name of the build configuration.

oc get bc -o name

$ oc get bc -o name

Use the name of the build configuration from the previous step to view the Maven progress of the build.

oc logs -f buildconfig/BUILD_CONFIG_NAME

$ oc logs -f buildconfig/BUILD_CONFIG_NAME

For example, for the kitchensink quickstart, the following command shows the progress of the Maven build.

oc logs -f buildconfig/jboss-eap-quickstarts

$ oc logs -f buildconfig/jboss-eap-quickstarts

Get the service name of your application using the following command.

oc get service

$ oc get service

Expose the service as a route so you can access your application from outside of OpenShift. For example, for the kitchensink quickstart, use the following command to expose the required service and port.

oc expose service/jboss-eap-quickstarts --port=8080

$ oc expose service/jboss-eap-quickstarts --port=8080

Get the URL of the route.

oc get route

$ oc get route

Optionally, you can also scale up the application instance by running the following command. This increases the number of replicas to 3.

oc scale deploymentconfig DEPLOYMENTCONFIG_NAME --replicas=3

$ oc scale deploymentconfig DEPLOYMENTCONFIG_NAME --replicas=3

For example, for the kitchensink quickstart, use the following command to scale up the application.

oc scale deploymentconfig jboss-eap-quickstarts --replicas=3

$ oc scale deploymentconfig jboss-eap-quickstarts --replicas=3