Oracle Fusion Middleware on Kubernetes > Oracle SOA Suite > Administration Guide > Set up a load balancer > Apache web tier

Apache web tier

This section provides information about how to install and configure the Apache web tier to load balance Oracle SOA Suite domain clusters. You can configure Apache web tier for non-SSL and SSL termination access of the application URL.

Follow these steps to set up the Apache web tier as a load balancer for an Oracle SOA Suite domain in a Kubernetes cluster:

Build the Apache web tier image
Create the Apache plugin configuration file
Prepare the certificate and private key
Install the Apache web tier Helm chart
Verify domain application URL access
Uninstall Apache web tier

Build the Apache web tier image

Refer to the sample, to build the Apache web tier Docker image.

Create the Apache plugin configuration file

The configuration file named custom_mod_wl_apache.conf should have all the URL routing rules for the Oracle SOA Suite applications deployed in the domain that needs to be accessible externally. Update this file with values based on your environment. The file content is similar to below.

Click here to see the sample content of the configuration file custom_mod_wl_apache.conf for soa domain


 # Copyright (c) 2020 Oracle and/or its affiliates.
 #
 # Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl.
 #

 <IfModule mod_weblogic.c>
 WebLogicHost <WEBLOGIC_HOST>
 WebLogicPort 7001
 </IfModule>

 # Directive for weblogic admin Console deployed on WebLogic Admin Server

 <Location /console>
 SetHandler weblogic-handler
 WebLogicHost soainfra-adminserver
 WebLogicPort 7001
 </Location>

 <Location /em>
 SetHandler weblogic-handler
 WebLogicHost soainfra-adminserver
 WebLogicPort 7001
 </Location>

 <Location /servicebus>
 SetHandler weblogic-handler
 WebLogicHost soainfra-adminserver
 WebLogicPort 7001
 </Location>

 <Location /lwpfconsole>
 SetHandler weblogic-handler
 WebLogicHost soainfra-adminserver
 WebLogicPort 7001
 </Location>

 <Location /xbusrouting>
 SetHandler weblogic-handler
 WebLogicHost soainfra-adminserver
 WebLogicPort 7001
 </Location>

 <Location /xbustransform>
 SetHandler weblogic-handler
 WebLogicHost soainfra-adminserver
 WebLogicPort 7001
 </Location>

 <Location /weblogic/ready>
 SetHandler weblogic-handler
 WebLogicHost soainfra-adminserver
 WebLogicPort 7001
 </Location>
# Directive for all applications deployed on weblogic cluster with a prepath defined by LOCATION variable.
# For example, if the LOCATION is set to '/weblogic', all applications deployed on the cluster can be accessed via
# http://myhost:myport/weblogic/application_end_url
# where 'myhost' is the IP of the machine that runs the Apache web tier, and
#       'myport' is the port that the Apache web tier is publicly exposed to.
# Note that LOCATION cannot be set to '/' unless this is the only Location module configured.
<Location /soa-infra>
WLSRequest On
WebLogicCluster soainfra-cluster-soa-cluster:7003
PathTrim /weblogic1
</Location>

<Location /soa/composer>
 WLSRequest On
 WebLogicCluster soainfra-cluster-soa-cluster:7003
 PathTrim /weblogic1
</Location>

<Location /integration/worklistapp>
WLSRequest On
WebLogicCluster soainfra-cluster-soa-cluster:7003
PathTrim /weblogic1
</Location>

<Location /ess>
WLSRequest On
WebLogicCluster soainfra-cluster-soa-cluster:7003
PathTrim /weblogic1
</Location>

<Location /EssHealthCheck>
WLSRequest On
WebLogicCluster soainfra-cluster-soa-cluster:7003
PathTrim /weblogic1
</Location>

# Directive for all application deployed on weblogic cluster with a prepath defined by LOCATION2 variable
# For example, if the LOCATION2 is set to '/weblogic2', all applications deployed on the cluster can be accessed via
# http://myhost:myport/weblogic2/application_end_url
# where 'myhost' is the IP of the machine that runs the Apache web tier, and
#       'myport' is the port that the Apache webt ier is publicly exposed to.
#<Location /weblogic2>
#WLSRequest On
#WebLogicCluster domain2-cluster-cluster-1:8021
#PathTrim /weblogic2
#</Location>

Create a PV and PVC (pv-claim-name) that can be used to store the custom_mod_wl_apache.conf. Refer to the Sample for creating a PV or PVC.

Prepare the certificate and private key

(For the SSL termination configuration only) Run the following commands to generate your own certificate and private key using openssl.

 $ cd ${WORKDIR}
 $ cd charts/apache-samples/custom-sample
 $ export VIRTUAL_HOST_NAME=WEBLOGIC_HOST
 $ export SSL_CERT_FILE=WEBLOGIC_HOST.crt
 $ export SSL_CERT_KEY_FILE=WEBLOGIC_HOST.key
 $ sh certgen.sh

NOTE: Replace WEBLOGIC_HOST with the host name on which Apache web tier is to be installed.

Click here to see the output of the certifcate generation

Prepare input values for the Apache web tier Helm chart.

Run the following commands to prepare the input value file for the Apache web tier Helm chart.

$ base64 -i ${SSL_CERT_FILE} | tr -d '\n'
$ base64 -i ${SSL_CERT_KEY_FILE} | tr -d '\n'
$ touch input.yaml

Update the input parameters file, charts/apache-samples/custom-sample/input.yaml.

Click here to see the snapshot of the sample input.yaml file

Install the Apache web tier Helm chart

Install the Apache web tier Helm chart to the domain namespace (for example soans) with the specified input parameters:

$ cd ${WORKDIR}/charts
$ helm install apache-webtier --values apache-samples/custom-sample/input.yaml --namespace soans apache-webtier --set image=oracle/apache:12.2.1.3

Check the status of the Apache web tier:

 $ kubectl get all -n soans | grep apache

Sample output of the status of the Apache web tier:

pod/apache-webtier-apache-webtier-65f69dc6bc-zg5pj   1/1     Running     0          22h
service/apache-webtier-apache-webtier   NodePort       10.108.29.98     <none>        80:30305/TCP,4433:30443/TCP   22h
deployment.apps/apache-webtier-apache-webtier   1/1     1            1           22h
replicaset.apps/apache-webtier-apache-webtier-65f69dc6bc   1         1         1       22h

Verify domain application URL access

After the Apache web tier load balancer is running, verify that the domain applications are accessible through the load balancer port 30305/30443. The application URLs for domain of type soa are:

Note: Port 30305 is the LOADBALANCER-Non-SSLPORT and port 30443 is LOADBALANCER-SSLPORT.

NONSSL configuration

 http://${LOADBALANCER-HOSTNAME}:${LOADBALANCER-Non-SSLPORT}/weblogic/ready
 http://${LOADBALANCER-HOSTNAME}:${LOADBALANCER-Non-SSLPORT}/console
 http://${LOADBALANCER-HOSTNAME}:${LOADBALANCER-Non-SSLPORT}/em
 http://${LOADBALANCER-HOSTNAME}:${LOADBALANCER-Non-SSLPORT}/soa-infra
 http://${LOADBALANCER-HOSTNAME}:${LOADBALANCER-Non-SSLPORT}/soa/composer
 http://${LOADBALANCER-HOSTNAME}:${LOADBALANCER-Non-SSLPORT}/integration/worklistapp

SSL configuration

https://${LOADBALANCER-HOSTNAME}:${LOADBALANCER-SSLPORT}/weblogic/ready
https://${LOADBALANCER-HOSTNAME}:${LOADBALANCER-SSLPORT}/console
https://${LOADBALANCER-HOSTNAME}:${LOADBALANCER-SSLPORT}/em
https://${LOADBALANCER-HOSTNAME}:${LOADBALANCER-SSLPORT}/soa-infra
https://${LOADBALANCER-HOSTNAME}:${LOADBALANCER-SSLPORT}/soa/composer
https://${LOADBALANCER-HOSTNAME}:${LOADBALANCER-SSLPORT}/integration/worklistapp

Uninstall Apache web tier

$ helm delete apache-webtier -n soans