Chapter 28. Red Hat Decision Manager clusters in a development (authoring) environment

Procedure

1. Navigate to the Software Downloads page in the Red Hat Customer Portal (login required), and select the product and version from the drop-down options:

   • Product: Data Grid
   • Version: 7.3

2. Download and unzip the Red Hat JBoss Data Grid 7.3.0 Server (jboss-datagrid-7.3.0-1-server.zip) installation file to the preferred location on your system.

   The unzipped directory is referred to as JDG_HOME.

3. Update Red Hat Data Grid to the latest version. For more information, see Red Hat Data Grid Red Hat Data Grid User Guide.

4. To run Red Hat Data Grid, navigate to JDG_HOME/bin and enter the following command:

   $ ./standalone.sh -c clustered.xml -b <HOST>

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   Replace <HOST> with the IP address or host name of the server where you installed Red Hat Data Grid.

Procedure

1. Navigate to the Software Downloads page in the Red Hat Customer Portal (login required), and select the product and version from the drop-down options:

   • Product: AMQ Broker
   • Version: 7.7.0
2. Click Download next to Red Hat AMQ Broker 7.7.0 (amq-broker-7.7.0-bin.zip).
3. Extract the amq-broker-7.7.0-bin.zip file.
4. Change directory to amq-broker-7.7.0-bin/amq-broker-7.7.0/bin.

5. Enter the following command and replace the following placeholders to create the broker and broker user:

   • <HOST> is the IP address or host name of the server where you installed AMQ Broker.
   • <AMQ_USER> and <AMQ_PASSWORD> is a user name and password combination of your choice.

   • <BROKER_NAME> is a name for the broker that you are creating.

     ./artemis create --host <HOST> --user <AMQ_USER> --password <AMQ_PASSWORD> --require-login <BROKER_NAME>

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6. To run AMQ Broker, enter the following command in the amq-broker-7.7.0-bin/amq-broker-7.7.0/bin directory:

   <BROKER_NAME>/bin/artemis run

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Procedure

1. Configure a server to export NFS version 4 shares. For instructions about exporting NFS shares on Red Hat Enterprise Linux, see Exporting NFS shares in Managing file systems. For more information about creating the NFS server, see How to configure NFS in RHEL 7.

2. On the server, create an /opt/kie/data share with the rw,sync,no_root_squash options by adding the following line to the /etc/exports file:

   /opt/kie/data *(rw,sync,no_root_squash)

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   In this example, /opt/kie/data is the shared folder, * are the IP addresses allowed to connect to the NFS server, and (rw,sync,no_root_squash) are the minimum options required for NFS. For example:

   /opt/kie/data 192.268.1.0/24(rw,sync,no_root_squash)

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   Note

   You can use another share name instead of '/opt/kie/data'. In this case, you must use this name when configuring all nodes that run Business Central.

Procedure

1. Download Red Hat JBoss EAP 7.3 on each node of the cluster:

   1. Navigate to the Software Downloads page in the Red Hat Customer Portal (login required), and select the product and version from the drop-down options:

      • Product: Enterprise Application Platform
      • Version: 7.3
   2. Click Download next to Red Hat JBoss Enterprise Application Platform 7.3.0. (JBEAP-7.3.0/jboss-eap-7.3.0.zip).
2. Extract the jboss-eap-7.3.0.zip file. In the following steps, EAP_HOME is the jboss-eap-7.3/jboss-eap-7.3 directory.
3. Download and apply the latest Red Hat JBoss EAP patch, if available.

4. Download Red Hat Decision Manager on each node of the cluster:

   1. Navigate to the Software Downloads page in the Red Hat Customer Portal, and select the product and version from the drop-down options:

      • Product: Decision Manager
      • Version: 7.9
   2. Download Red Hat Decision Manager 7.9.1 Business Central Deployable for Red Hat JBoss EAP 7 (rhdm-7.9.1-decision-central-eap7-deployable.zip).
5. Extract the rhdm-7.9.1-decision-central-eap7-deployable.zip file to a temporary directory. In the following commands this directory is called TEMP_DIR.
6. Copy the contents of TEMP_DIR/rhdm-7.9.1-decision-central-eap7-deployable/jboss-eap-7.3 to EAP_HOME.
7. Download and apply the latest Red Hat Decision Manager patch, if available.
8. Configure Red Hat Single Sign-On for your high availability environment. For more information, see Integrating Red Hat Decision Manager with Red Hat Single Sign-On and the Red Hat Single Sign-On Server Administration Guide.

Procedure

1. Mount the directory shared over NFS as /data. Enter the following commands as the root user:

   mkdir /data
   mount <NFS_SERVER_IP>:<DATA_SHARE> /data

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   Replace <NFS_SERVER_IP> with the IP address or hostname of the NFS server machine. Replace <DATA_SHARE> with the share name that you configured (for example, /opt/kie/data).

2. Create a kie-wb-playground directory in the /data NFS directory:

   mkdir /kie-wb-playground

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3. Create a kie-wb-playground directory in the EAP_HOME/bin directory and mount the directory:

   mount -o rw,sync,actimeo=1 <NFS_SERVER_IP>:<DATA_SHARE>/kie-wb-playground kie-wb-playground

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4. Open the EAP_HOME/standalone/configuration/standalone-full.xml file in a text editor.

5. Edit or add the properties under the <system-properties> element and replace the following placeholders:

   • <AMQ_USER> and <AMQ_PASSWORD> are the credentials that you defined when creating the AMQ Broker.
   • <AMQ_BROKER_IP_ADDRESS> is the IP address of the AMQ Broker.

   • <DATA_GRID_NODE_IP> is the IP address where Red Hat Data Grid is installed.

     <system-properties>
       <property name="appformer-jms-connection-mode" value="REMOTE"/>
       <property name="appformer-jms-username" value="<AMQ_USER>"/>
       <property name="appformer-jms-password" value="<AMQ_USER_PASSWORD>"/>
       <property name="appformer-jms-url"
          value="tcp://<AMQ_BROKER_IP_ADDRESS>:61616?ha=true&amp;retryInterval=1000&amp;retryIntervalMultiplier=1.0&amp;reconnectAttempts=-1"/>
       <property name="org.appformer.ext.metadata.infinispan.port"
          value="11222"/>
       <property name="org.appformer.ext.metadata.infinispan.host"
          value="<DATA_GRID_NODE_IP>"/>
       <property name="org.appformer.ext.metadata.infinispan.realm"
          value="ApplicationRealm"/>
       <property name="org.appformer.ext.metadata.infinispan.cluster"
          value="kie-cluster"/>
       <property name="org.appformer.ext.metadata.index"
          value="infinispan"/>
       <property name="org.uberfire.nio.git.dir"
          value="/data"/>
       <property name="es.set.netty.runtime.available.processors"
          value="false"/>
     </system-properties>

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6. Optional: If the Red Hat Data Grid deployment requires authentication, edit or add the properties under the <system-properties> element and replace the following placeholders:

   • <SERVER_NAME> is the server name specified in your Red Hat Data Grid server configuration.

   • <SASL_QOP> is the combination of auth, auth-int and auth-conf values for your Red Hat Data Grid server configuration.

     <property name="org.appformer.ext.metadata.infinispan.server.name"
        value="<SERVER_NAME>"/>
     <property name="org.appformer.ext.metadata.infinispan.sasl.qop"
        value="<SASL_QOP>"/>
     <property name="org.appformer.ext.metadata.infinispan.username"
        value=""/>
     <property name="org.appformer.ext.metadata.infinispan.password"
        value=""/>

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7. Save the standalone-full.xml file.

8. To start the cluster, navigate to EAP_HOME/bin and enter the following command:

   $ ./standalone.sh -c standalone-full.xml -b <HOST>

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   Replace <HOST> with the IP address or host name of the server where you installed Red Hat Decision Manager.

Procedure

1. Test the network speed by following these steps:

   1. In the command terminal of each server node, install iPerf3:

      $ dnf install iperf3

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   2. In the command terminal of the NFS server node (server node 3), start iPerf3 in server mode:

      $ iperf3 -s

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   3. In the command terminal of each Business Central server node, start iPerf3 in client mode with the NFS server node set as the host:

      $ iperf3 -c <NFS_SERVER_IP>

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   4. Compare the results from each server node with the following example of minimum values:

      iperf3 -c 172.31.47.103
      Connecting to host 172.31.47.103, port 5201
      [  5] local 172.31.39.4 port 44820 connected to 172.31.47.103 port 5201
      [ ID] Interval           Transfer     Bitrate         Retr  Cwnd
      [  5]   0.00-1.00   sec   143 MBytes  1.20 Gbits/sec    0    419 KBytes
      [  5]   1.00-2.00   sec   111 MBytes   928 Mbits/sec    6    848 KBytes
      [  5]   2.00-3.00   sec  53.8 MBytes   451 Mbits/sec    0   1.08 MBytes
      [  5]   3.00-4.00   sec  52.5 MBytes   440 Mbits/sec    1   1022 KBytes
      [  5]   4.00-5.00   sec  53.8 MBytes   451 Mbits/sec    1    935 KBytes
      [  5]   5.00-6.00   sec  53.8 MBytes   451 Mbits/sec    1    848 KBytes
      [  5]   6.00-7.00   sec  52.5 MBytes   440 Mbits/sec    0   1.08 MBytes
      [  5]   7.00-8.00   sec  53.8 MBytes   451 Mbits/sec    1   1.01 MBytes
      [  5]   8.00-9.00   sec  53.8 MBytes   451 Mbits/sec    1    953 KBytes
      [  5]   9.00-10.00  sec  52.5 MBytes   440 Mbits/sec    1    856 KBytes
      - - - - - - - - - - - - - - - - - - - - - - - - -
      [ ID] Interval           Transfer     Bitrate         Retr
      [  5]   0.00-10.00  sec   680 MBytes   570 Mbits/sec   12             sender
      [  5]   0.00-10.04  sec   677 MBytes   566 Mbits/sec                  receiver
      
      iperf Done.

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2. Verify the NFS information by following these steps:

   1. In the command terminal of each Business Central server node, mount the NFS node:

      $ mount -o actimeo=1 <NFS_SERVER_IP>:/opt/nfs/kie /opt/kie/niogit

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   2. In the command terminal of each mounted node, enter nfsiostat:

      $ nfsiostat

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   3. Compare the results from each server node with the following example of minimum values:

      nfsiostat
      ops/s	rpc bklog
      6.415	0.000
      
      read:
      ops/s	kB/s	kB/op	retrans	avg RTT (ms)	avg exe (ms)	avg queue (ms)	errors
      0.031	0.045	1.452	0 (0.0%)	0.129		0.166		0.019		0 (0.0%)
      
      write:
      ops/s	kB/s	kB/op	retrans	avg RTT (ms)	avg exe (ms)	avg queue (ms)	errors
      0.517	0.467	0.903	0 (0.0%)	1.235		1.269		0.01 8		0 (0.0%)

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3. Verify that the disk is an SSD by following these steps:

   1. In the command terminal of the NFS server, enter df -h to identify the disk as shown in the following example:

      $ df -h
      Filesystem               Size  Used Avail Use% Mounted on
      devtmpfs                 3.8G     0  3.8G   0% /dev
      tmpfs                    3.9G     0  3.9G   0% /dev/shm
      tmpfs                    3.9G   33M  3.8G   1% /run
      tmpfs                    3.9G     0  3.9G   0% /sys/fs/cgroup
      /dev/xvda2                25G  3.2G   22G  13% /
      tmpfs                    781M     0  781M   0% /run/user/1000
      172.31.47.103:/root/nfs   25G  2.1G   23G   9% /root/nfs

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   2. Enter lsblk -d to verify that the disk is an SSD:

      $ lsblk -d

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   3. Enter hdparm -Tt to test the disk:

      $ hdparm -Tt /dev/xvda2

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   4. Compare the results from each server node with the following example of minimum values:

      $ hdparm -Tt /dev/xvda2
      
      /dev/xvda2:
       Timing cached reads:   18670 MB in  1.99 seconds = 9389.01 MB/sec
       Timing buffered disk reads: 216 MB in  3.03 seconds =  71.40 MB/sec

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Procedure

1. In a web browser, enter <node-IP-address>:8080/decision-central. Replace <node-IP-address> with the IP address of a particular node.
2. Enter the admin user credentials that you created during installation. The Business Central home page appears.
3. Select Menu Design Projects.
4. Open the MySpace space.
5. Click Try Samples Mortgages OK. The Assets window appears.
6. Click Add Asset Data Object.
7. Enter MyDataObject in the Data Object field and click OK.
8. Click Spaces MySpace Mortgages and confirm that MyDataObject is in the list of assets.

9. Enter the following URL in a web browser, where <node_IP_address> is the address of a different node of the cluster:

   http://<node_IP_address>:8080/decision-central

10. Enter the same credentials that you used to log in to Business Central on the first node, where you created the MyDataObject asset.
11. Select Menu→ Design Projects.
12. Open the MySpace space.
13. Select the Mortgages project.
14. Verify that MyDataObject is in the asset list.
15. Delete the Mortgages project.