Getting Started with the NGINX Ingress Operator on Red Hat OpenShift

In the partnership between F5 with Red Hat, F5 continue to focus on supporting enterprise users who require a high‑performance, scalable, long‑term solution for DevOps‑compatible service delivery in OpenShift. The NGINX Ingress Operator for OpenShift is a supported and certified mechanism for deploying NGINX Plus Ingress Controller for Kubernetes alongside the default router in an OpenShift environment, with point-and-click installation and automatic upgrades. You can leverage the Operator Lifecycle Manager (OLM) to perform installation, upgrade, and configuration of the NGINX Ingress Operator.

We install the NGINX Ingress Operator from the OpenShift console.

1. Log into the OpenShift console as an administrator.
2. In the left navigation column, click Operators and then OperatorHub. Type nginx in the search box, and click on the Nginx Ingress Operator box that appears.
   
3. After reviewing the product information, click the  Install  button.
   
4. On the Create Operator Subscription page that opens, specify the cluster namespace in which to install the operator (in this example it’s nginx-ingress). Also click the Automatic radio button under Approval Strategy, to enable automatic updates of the running Operator instance without manual approval from the administrator. Click the  Subscribe  button.
   
5. After the installation completes, run this command in a terminal to verify that the Operator is running:
   
6. Click Installed Operators in the left navigation column. On the page that opens, click the NginxIngressController link in the Provided APIs column. NginxIngressController is a custom resource which the Operator uses to deploy the NGINX Plus Ingress Controller on the OpenShift cluster.
   
7. On the page that opens, paste a manifest like the following example into the text field, and click the  Create  button to deploy the NGINX Plus Ingress Controller for Kubernetes deployment.Note that we are embedding a Secret with a TLS certificate and key in the defaultSecret and wildcardTLS fields. This enables TLS termination and passthrough without requiring the Secret to be included in the Ingress policies.There are numerous options you can set when configuring the NGINX Plus Ingress Controller for Kubernetes, as listed at our GitHub repo.
   
8. To verify the deployment, run the following commands in a terminal. As shown in the output, the manifest we used in the previous step deployed two replicas of the NGINX Plus Ingress Controller and exposed them with a LoadBalancer service. (The output from the get command is spread across multiple lines for legibility.)
   
9. Run the following command to verify that the NGINX Plus Ingress Controller responds to requests. For public_IP_address substitute the external IP address of the LoadBalancer service exposing the NGINX Plus Ingress Controller.Notice that at this point the command returns 404 Not Found. That’s because we haven’t yet configured and deployed an Ingress resource to route traffic to the backend Pods. For more information, see our documentation.
   

   Note that end users can submit multiple manifests of the NginxIngressController resource and a separate deployment is created for each one. The Operator also supports deployments across different namespaces. The namespace can be specified in the metadata section of the manifest.

What’s Next?

The NGINX Ingress Operator helps you manage your NGINX Plus Ingress Controller deployment, in particular with:

• Configuration – Launch a basic deployment with just a few input parameters and one manifest
• Scaling – Add and remove replicas seamlessly
• Upgrading – Leverage rolling updates with no downtime
• Uninstalling – Ensure that all Operator and Kubernetes Ingress Controller objects are properly and safely removed

Now that you have the NGINX Plus Ingress Controller ready and deployed, see our documentation and GitHub repo to use the advanced capabilities of NGINX Plus in OpenShift.

Article Source: Amir Rawdat of F5, published on April 30, 2020, https://www.nginx.com/blog/getting-started-nginx-ingress-operator-red-hat-openshift/                                                                                                                          Tags: Red Hat, OpenShift, NGINX Ingress Controller

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