Chapter 2. Installing and starting the employee rostering starter application on OpenShift

Procedure

1. Determine whether Red Hat OpenShift Container Platform is configured with the user name and password for Red Hat registry access. For details about the required configuration, see Configuring a Registry Location. If you are using an OpenShift Online subscription, it is configured for Red Hat registry access.

2. If Red Hat OpenShift Container Platform is configured with the user name and password for Red Hat registry access, run the following command:

   $ oc get imagestreamtag -n openshift | grep rhdm73-optaweb-employee-rostering

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   If the output of the command is not empty, the required image streams are available in the openshift namespace and no further action is required.

3. If the output of the command is empty or if OpenShift is not configured with the user name and password for Red Hat registry access, complete the following steps:

   1. Ensure you are logged in to OpenShift with the oc command and that your project is active.
   2. Complete the steps documented in Registry Service Accounts for Shared Environments. You must log on to Red Hat Customer Portal to access the document and to complete the steps to create a registry service account.
   3. Select the OpenShift Secret tab and click the link under Download secret to download the YAML secret file.
   4. View the downloaded file and note the name that is listed in the name: entry.

   5. Run the following commands:

      oc create -f <file_name>.yaml
      oc secrets link default <secret_name> --for=pull
      oc secrets link builder <secret_name> --for=pull

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      Where <file_name> is the name of the downloaded file and <secret_name> is the name that is listed in the name: entry of the file.

   6. Download the rhdm-7.3.0-openshift-templates.zip file from the Software Downloads page for Red Hat Decision Manager 7.3.
   7. Extract the rhdm73-image-streams.yaml file.

   8. Complete one of the following actions:

      • Run the following command:

        $ oc create -f rhdm73-image-streams.yaml

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      • Using the OpenShift Web UI, select Add to Project Import YAML / JSON and then choose the file or paste its contents.

Procedure

1. Generate an SSL keystore with a private and public key for SSL encryption for the Employee Rostering application. In a production environment, generate a valid signed certificate that matches the expected URL of the application. Save the keystore in a file named keystore.jks. Record the name of the certificate and the password of the keystore file.

   See Generate a SSL Encryption Key and Certificate for more information on how to create a keystore with self-signed or purchased SSL certificates.

2. Use the oc command to generate a secret named optaweb-employee-rostering-app-secret from the new keystore file:

   $ oc create secret generic optaweb-employee-rostering-app-secret --from-file=keystore.jks

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Procedure

1. Download the rhdm-7.3.0-openshift-templates.zip file from the Software Downloads page for Red Hat Decision Manager 7.3.
2. Unzip the downloaded archive and locate the rhdm73-optaweb-employee-rostering.yaml file.

3. Use one of the following methods to deploy the template:

   • In the OpenShift Web UI, select Add to Project Import YAML / JSON and then select or paste the rhdm73-optaweb-employee-rostering.yaml file. In the Add Template window, ensure Process the template is selected and click Continue.

   • To use the OpenShift command line console, prepare the following command line:

     oc new-app -f <template-path>/rhdm73-optaweb-employee-rostering.yaml -p OPTAWEB_HTTPS_SECRET=optaweb-employee-rostering-app-secret

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     In this command line:

     • Replace <template-path> with the path to the downloaded template file.
     • Add as many -p PARAMETER=value pairs as needed to set the required parameters. You can view the template file to see descriptions for all parameters.

4. Set the following parameters as necessary:

   • Optaweb Employee Rostering Keystore Secret Name (OPTAWEB_HTTPS_SECRET): The name of the secret for HTTPS connections, as created in Section 2.1.2, “Creating the secrets for Employee Rostering”.
   • Application Name (APPLICATION_NAME): The name of the OpenShift application. It is used in the default URL for the application.
   • OptaWeb Admin User (OPTAWEB_ADMIN_USER): The user name for the administrative user in the application. The default user name is adminUser.
   • OptaWeb Admin Password (OPTAWEB_ADMIN_PWD): The password for the administrative user in the application. The default password is RedHat.
   • ImageStream Namespace (IMAGE_STREAM_NAMESPACE): The namespace where the image streams are available. If the image streams were already available in your OpenShift environment (see Section 2.1.1, “Ensuring the availability of image streams and the image registry”), the namespace is openshift. If you installed the image streams file, the namespace is the name of the OpenShift project.
   • Optaweb Employee Rostering Container Memory Limit (OPTAWEB_MEMORY_LIMIT): The memory limit for the application container. The higher the limit, the more employees and shifts are supported. The default is 1 Gi.
   • Optaweb Employee Rostering Generator Zone ID (OPTAWEB_GENERATOR_ZONE_ID): The time zone that is set in the generated example data sets in the application. The default is the local time zone of the OpenShift server.

5. Complete the creation of the environment, depending on the method that you are using:

   • In the OpenShift Web UI, click Create.

     • If the This will create resources that may have security or project behavior implications pop-up message is displayed, click Create Anyway.
   • Complete and run the command line.