Oracle Fusion Middleware on Kubernetes > Oracle SOA Suite > Administration Guide > Set up a load balancer > NGINX

NGINX

This section provides information about how to install and configure the ingress-based NGINX load balancer to load balance Oracle SOA Suite domain clusters. You can configure NGINX for non-SSL, SSL termination, and end-to-end SSL access of the application URL.

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

See the official installation document for prerequisites.

Install the NGINX load balancer for non-SSL and SSL termination configuration
Generate secret for SSL access
Install NGINX load balancer for end-to-end SSL configuration
Configure NGINX to manage ingresses
Verify domain application URL access
Uninstall NGINX ingress
Uninstall NGINX

To get repository information, enter the following Helm commands:

  $ helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
  $ helm repo update

Install the NGINX load balancer for non-SSL and SSL termination configuration

Deploy the ingress-nginx controller by using Helm on the domain namespace:

 $ helm install nginx-ingress -n soans \
        --set controller.service.type=NodePort \
        --set controller.admissionWebhooks.enabled=false \
        ingress-nginx/ingress-nginx

Click here to see the sample output.

  NAME: nginx-ingress
  LAST DEPLOYED: Thu May  5 13:27:30 2022
  NAMESPACE: soans
  STATUS: deployed
  REVISION: 1
  TEST SUITE: None
  NOTES:
  The ingress-nginx controller has been installed.
  Get the application URL by running these commands:
  export HTTP_NODE_PORT=$(kubectl --namespace soans get services -o jsonpath="{.spec.ports[0].nodePort}" nginx-ingress-ingress-nginx-controller)
  export HTTPS_NODE_PORT=$(kubectl --namespace soans get services -o jsonpath="{.spec.ports[1].nodePort}" nginx-ingress-ingress-nginx-controller)
  export NODE_IP=$(kubectl --namespace soans get nodes -o jsonpath="{.items[0].status.addresses[1].address}")

  echo "Visit http://$NODE_IP:$HTTP_NODE_PORT to access your application via HTTP."
  echo "Visit https://$NODE_IP:$HTTPS_NODE_PORT to access your application via HTTPS."

  An example ingress that makes use of the controller:

    apiVersion: networking.k8s.io/v1
    kind: Ingress
    metadata:
      name: example
      namespace: foo
    spec:
      ingressClassName: nginx
      rules:
      - host: www.example.com
        http:
        paths:
          - pathType: Prefix
            backend:
              service:
                name: exampleService
                port:
                  number: 80
          path: /
   # This section is only required if TLS is to be enabled for the ingress
   tls:
    - hosts:
        - www.example.com
      secretName: example-tls

   If TLS is enabled for the ingress, a secret containing the certificate and key must also be provided:

  apiVersion: v1
  kind: Secret
  metadata:
    name: example-tls
    namespace: foo
  data:
   tls.crt: <base64 encoded cert>
   tls.key: <base64 encoded key>
  type: kubernetes.io/tls

Generate secret for SSL access

For secured access (SSL and E2ESSL) to the Oracle SOA Suite application, create a certificate and generate secrets:
```
 $ openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /tmp/tls1.key -out /tmp/tls1.crt -subj "/CN=domain1.org"
 $ kubectl -n soans create secret tls soainfra-tls-cert --key /tmp/tls1.key --cert /tmp/tls1.crt
```
Note: The value of CN is the host on which this ingress is to be deployed and secret name should be <domainUID>-tls-cert.

Install NGINX load balancer for end-to-end SSL configuration

Deploy the ingress-nginx controller by using Helm on the domain namespace:

 $ helm install nginx-ingress -n soans \
       --set controller.extraArgs.default-ssl-certificate=soans/soainfra-tls-cert \
       --set controller.service.type=NodePort \
       --set controller.admissionWebhooks.enabled=false \
       --set controller.extraArgs.enable-ssl-passthrough=true  \
        ingress-nginx/ingress-nginx

Click here to see the sample output.

Check the status of the deployed ingress controller:

$ kubectl --namespace soans get services | grep ingress-nginx-controller

Sample output:

 nginx-ingress-ingress-nginx-controller   NodePort    10.106.186.235   <none>        80:32125/TCP,443:31376/TCP   19m

Configure NGINX to manage ingresses

Choose an appropriate LOADBALANCER_HOSTNAME for accessing the Oracle SOA Suite domain application URLs.
```
$ export LOADBALANCER_HOSTNAME=<LOADBALANCER_HOSTNAME>
```
For example, if you are executing the commands from a master node terminal, where the master hostname is LOADBALANCER_HOSTNAME:
```
$ export LOADBALANCER_HOSTNAME=$(hostname -f)
```
Create an ingress for the domain in the domain namespace by using the sample Helm chart. Here path-based routing is used for ingress. Sample values for default configuration are shown in the file ${WORKDIR}/charts/ingress-per-domain/values.yaml. By default, type is TRAEFIK , sslType is NONSSL, and domainType is soa. These values can be overridden by passing values through the command line or can be edited in the sample file values.yaml.
If needed, you can update the ingress YAML file to define more path rules (in section spec.rules.host.http.paths) based on the domain application URLs that need to be accessed. Update the template YAML file for the NGINX load balancer located at ${WORKDIR}/charts/ingress-per-domain/templates/nginx-ingress.yaml.

Note: See here for all the configuration parameters.
```
 $ cd ${WORKDIR}
 $ helm install soa-nginx-ingress  charts/ingress-per-domain \
     --namespace soans \
     --values charts/ingress-per-domain/values.yaml \
     --set "nginx.hostname=${LOADBALANCER_HOSTNAME}" \
     --set type=NGINX
```
Sample output:
```
NAME: soa-nginx-ingress
LAST DEPLOYED: Fri Jul 24 09:34:03 2020
NAMESPACE: soans
STATUS: deployed
REVISION: 1
TEST SUITE: None
```

Install ingress-per-domain using Helm for SSL termination configuration:

 $ cd ${WORKDIR}
 $ helm install soa-nginx-ingress  charts/ingress-per-domain \
     --namespace soans \
     --values charts/ingress-per-domain/values.yaml \
     --set "nginx.hostname=${LOADBALANCER_HOSTNAME}" \
     --set type=NGINX --set sslType=SSL

Sample output:

 NAME: soa-nginx-ingress
 LAST DEPLOYED: Fri Jul 24 09:34:03 2020
 NAMESPACE: soans
 STATUS: deployed
 REVISION: 1
 TEST SUITE: None

Install ingress-per-domain using Helm for E2ESSL configuration.

Note: To use the E2ESSL configuration, you must have created the Oracle SOA Suite domain with sslEnabled set to true. See Create Oracle SOA Suite domains.

 $ cd ${WORKDIR}
 $ helm install soa-nginx-ingress  charts/ingress-per-domain \
     --namespace soans \
     --values charts/ingress-per-domain/values.yaml \
     --set type=NGINX --set sslType=E2ESSL

Sample output:

 NAME: soa-nginx-ingress
 LAST DEPLOYED: Fri Jul 24 09:34:03 2020
 NAMESPACE: soans
 STATUS: deployed
 REVISION: 1
 TEST SUITE: None

For NONSSL access to the Oracle SOA Suite application, get the details of the services by the ingress:

$ kubectl describe ingress soainfra-nginx -n soans

Click here to see the sample output of the services supported by the above deployed ingress.

Name:             soainfra-nginx
Namespace:        soans
Address:          100.111.150.225
Default backend:  default-http-backend:80 (<error: endpoints "default-http-backend" not found>)
Rules:
Host                                                   Path  Backends
----                                                   ----  --------
domain1.org
                                                     /console                   soainfra-adminserver:7001 (10.244.0.45:7001)
                                                     /em                        soainfra-adminserver:7001 (10.244.0.45:7001)
                                                     /weblogic/ready            soainfra-adminserver:7001 (10.244.0.45:7001)
                                                     /                          soainfra-cluster-soa-cluster:7003 (10.244.0.46:7003,10.244.0.47:7003)
                                                     /soa-infra                 soainfra-cluster-soa-cluster:7003 (10.244.0.46:7003,10.244.0.47:7003)
                                                     /soa/composer              soainfra-cluster-soa-cluster:7003 (10.244.0.46:7003,10.244.0.47:7003)
                                                     /integration/worklistapp   soainfra-cluster-soa-cluster:7003 (10.244.0.46:7003,10.244.0.47:7003)
Annotations:                                             <none>
Events:
Type    Reason  Age    From                      Message
----    ------  ----   ----                      -------
Normal  CREATE  2m32s  nginx-ingress-controller  Ingress soans/soainfra-nginx
Normal  UPDATE  94s    nginx-ingress-controller  Ingress soans/soainfra-nginx

For SSL access to the Oracle SOA Suite application, get the details of the services by the above deployed ingress:

 $ kubectl describe ingress soainfra-nginx -n soans

Click here to see the sample output of the services supported by the above deployed ingress.

 Name:             soainfra-nginx
 Namespace:        soans
 Address:          100.111.150.225
 Default backend:  default-http-backend:80 (<error: endpoints "default-http-backend" not found>)
 TLS:
   soainfra-tls-cert terminates domain1.org
 Rules:
    Host                                                   Path  Backends
    ----                                                   ----  --------
     domain1.org
                                                      /console                   soainfra-adminserver:7001 (10.244.0.45:7001)
                                                      /em                        soainfra-adminserver:7001 (10.244.0.45:7001)
                                                      /weblogic/ready            soainfra-adminserver:7001 (10.244.0.45:7001)
                                                      /                          soainfra-cluster-soa-cluster:7003 (10.244.0.46:7003,10.244.0.47:7003)
                                                      /soa-infra                 soainfra-cluster-soa-cluster:7003 (10.244.0.46:7003,10.244.0.47:7003)
                                                      /soa/composer              soainfra-cluster-soa-cluster:7003 (10.244.0.46:7003,10.244.0.47:7003)
                                                      /integration/worklistapp   soainfra-cluster-soa-cluster:7003 (10.244.0.46:7003,10.244.0.47:7003)
 Annotations:                                             kubernetes.io/ingress.class: nginx
                                                          nginx.ingress.kubernetes.io/configuration-snippet:
                                                          more_set_input_headers "X-Forwarded-Proto: https";
                                                          more_set_input_headers "WL-Proxy-SSL: true";
                                                          nginx.ingress.kubernetes.io/ingress.allow-http: false
 Events:
   Type    Reason  Age    From                      Message
   ----    ------  ----   ----                      -------
   Normal  CREATE  3m47s  nginx-ingress-controller  Ingress soans/soainfra-nginx
   Normal  UPDATE  3m25s  nginx-ingress-controller  Ingress soans/soainfra-nginx

For E2ESSL access to the Oracle SOA Suite application, get the details of the services by the above deployed ingress:

 $  kubectl describe ingress  soainfra-nginx-e2essl -n soans

Click here to see the sample output of the services supported by the above deployed ingress.

 Name:             soainfra-nginx-e2essl-admin
 Namespace:        soans
 Address:
 Default backend:  default-http-backend:80 (<error: endpoints "default-http-backend" not found>)
 TLS:
  soainfra-tls-cert terminates admin.org
 Rules:
   Host        Path  Backends
   ----        ----  --------
   admin.org
                       soainfra-adminserver-nginx-ssl:7002 (10.244.0.247:7002)
  Annotations:  kubernetes.io/ingress.class: nginx
                meta.helm.sh/release-name: soa-nginx-ingress
                meta.helm.sh/release-namespace: soans
                nginx.ingress.kubernetes.io/ssl-passthrough: true
 Events:
 Type    Reason  Age   From                      Message
 ----    ------  ----  ----                      -------
 Normal  Sync    4s    nginx-ingress-controller  Scheduled for sync

 Name:             soainfra-nginx-e2essl-soa
 Namespace:        soans
 Address:
 Default backend:  default-http-backend:80 (<error: endpoints "default-http-backend" not found>)
 TLS:
  soainfra-tls-cert terminates soa.org
 Rules:
  Host        Path  Backends
  ----        ----  --------
  soa.org
                 /   soainfra-cluster-soa-cluster:7004 (10.244.0.249:7004)
 Annotations:  kubernetes.io/ingress.class: nginx
               meta.helm.sh/release-name: soa-nginx-ingress
               meta.helm.sh/release-namespace: soans
               nginx.ingress.kubernetes.io/ssl-passthrough: true
Events:
   Type    Reason  Age   From                      Message
  ----    ------  ----  ----                      -------
 Normal  Sync    4s    nginx-ingress-controller  Scheduled for sync

Verify domain application URL access

NONSSL configuration

Get the LOADBALANCER_NON_SSLPORT NodePort of NGINX using the command:

$ LOADBALANCER_NON_SSLPORT=$(kubectl --namespace soans  get services -o jsonpath="{.spec.ports[0].nodePort}" nginx-ingress-ingress-nginx-controller)
$ echo ${LOADBALANCER_NON_SSLPORT}

Verify that the Oracle SOA Suite domain application URLs are accessible through the LOADBALANCER_NON_SSLPORT:

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

Get the LOADBALANCER_SSLPORT NodePort of NGINX using the command:

$ LOADBALANCER_SSLPORT=$(kubectl --namespace soans  get services -o jsonpath="{.spec.ports[1].nodePort}" nginx-ingress-ingress-nginx-controller)
$ echo ${LOADBALANCER_SSLPORT}

Verify that the Oracle SOA Suite domain application URLs are accessible through the LOADBALANCER_SSLPORT:

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

E2ESSL configuration

To access the SOA Suite domain application URLs from a remote browser, update the browser host config file /etc/hosts (In Windows, C:\Windows\System32\Drivers\etc\hosts) with the IP address of the host on which the ingress is deployed with below entries:
```
X.X.X.X  admin.domain.org
X.X.X.X  soa.domain.org
X.X.X.X  osb.domain.org
```
Note:
- The value of X.X.X.X is the host IP address on which this ingress is deployed.
- If you are behind any corporate proxy, make sure to update the browser proxy settings appropriately to access the host names updated /etc/hosts file.

Get the LOADBALANCER_SSLPORT NodePort of NGINX using the command:

$ LOADBALANCER_SSLPORT=$(kubectl --namespace soans  get services -o jsonpath="{.spec.ports[1].nodePort}" nginx-ingress-ingress-nginx-controller)
$ echo ${LOADBALANCER_SSLPORT}

Verify that the Oracle SOA Suite domain application URLs are accessible through LOADBALANCER_SSLPORT:

https://admin.org:${LOADBALANCER_SSLPORT}/weblogic/ready
https://admin.org:${LOADBALANCER_SSLPORT}/console
https://admin.org:${LOADBALANCER_SSLPORT}/em
https://soa.org:${LOADBALANCER_SSLPORT}/soa-infra
https://soa.org:${LOADBALANCER_SSLPORT}/soa/composer
https://soa.org:${LOADBALANCER_SSLPORT}/integration/worklistapp

Note: This is the default host name. If you have updated the host name in values.yaml, then use the updated values.

Uninstall NGINX ingress

Uninstall and delete the ingress-nginx deployment:

$ helm delete soa-nginx-ingress  -n soans

Uninstall NGINX

$ helm delete nginx-ingress -n soans