Merge pull request #401 from bgraef/main

update haproxy podman post

content/posts/ol/virt/post-33/index.md

@@ -2,7 +2,7 @@
 title: "Deploy HAProxy"
 date: 2023-03-09
 draft: false
-summary: "Learn how to deploy and run HAProxy from a container using Podman."
+summary: "Learn to run and configure HAProxy in a container using Podman."
 tags: ["ol","lab","tutorial","ol-podman"]
 showDate: true
 ---
@@ -11,30 +11,32 @@ showDate: true
 
 :crescent_moon: [Lab](https://luna.oracle.com/lab/a9eb9ff9-b56d-4ddc-9283-b72467d78128)
 
-:spiral_notepad: [Tutorial](https://docs.oracle.com/en/learn/podman-haproxy/)
+:spiral_notepad: [Tutorial](https://docs.oracle.com/en/learn/ol-podman-haproxy/)
 
 ## Details
 
-HAProxy is a well known, and widely used, open source solution delivering load balancing and proxy services for both HTTP (Layer 7) and TCP (Layer 4) which is achieved by spreading  incoming request across multiple servers.  For more details of the services that HAProxy _does_ and _does not_ provide please refer to the [upstream documentation](https://docs.haproxy.org).  HAProxy can be installed locally on [Oracle Linux](https://docs.oracle.com/en/operating-systems/oracle-linux/8/balancing/balancing-SettingUpLoadBalancingbyUsingHAProxy.html), or run as a container using Podman.  This lab describes how to use HAProxy with Podman.
-
-> **Clarification:** This document follows the long established custom which suggests that the term _"HAProxy"_ is used to represent the product, whereas _"haproxy"_ is used to represent the executable.  Although many other sources use these forms interchangeably.
+HAProxy is a well-known and widely used open-source solution that delivers load balancing and proxy services for HTTP (Layer 7) and TCP (Layer 4), achieved by spreading incoming requests across multiple servers. The load balancer can also detect if any servers in its pool become unresponsive and automatically stop forwarding incoming traffic to them. For more details on the services HAProxy *does* and *does not* provide, please refer to the [upstream documentation](https://docs.haproxy.org). You can install HAProxy locally using packages provided by Oracle or run as a container. This tutorial covers the latter using Podman.
 
 ### Objectives
 
-This lab shows how to:
+In this tutorial, you'll learn how to:
 
-  - Use HAProxy as a Podman-based container
-  - Configure a simple deployment using three back-end servers
+  - Use HAProxy as a Podman-based container 
+  - Configure a simple deployment using three backend servers
   - Confirm the deployment runs as expected
 
-  > **Note:** The steps provided do not include how to configure HAProxy to use certificates.  Therefore its recommended for non-production purposes or an internal/air-gapped environment.
+ > **Note:** The steps do not include configuring HAProxy to use certificates, which we recommend for production environments.
+
+### Prerequisites
 
-### Requirements
+- Minimum of 4 Oracle Linux systems
 
-Four systems with Oracle Linux and Podman installed, whose responsibilities are divided like this:
+   - HAProxy node
+   - 3 Web Application nodes
 
-   | Server Name | Role/Purpose                |
-   |:------------|:----------------------------|
-   | _ol-server_ | Hosts HAProxy load balancer |
-   | _web01_, _web02_, _web03_ | Hosts the web application |
+- Each system should have Oracle Linux installed and configured with:
+    - A non-root user account with sudo access
+    - Key-based SSH, also known as password-less SSH, between the hosts
+    - Podman and cURL packages
+    - Access to the Internet