add single cluster config

Author: chrisakker

docs/http/http-installation-guide.md

@@ -207,15 +207,22 @@ This can be any standard Linux OS system, based on the Linux Distro and Technica
 
       >NOTE:  This Solution will only work with NGINX Plus, as NGINX OpenSource does not have the API that is used in this Solution.  Installation on unsupported Linux Distros is not recommended.
 
+    1. If you need a license for NGINX Plus, a 30-day Trial license is available here:
+
+      https://www.nginx.com/free-trial-request/
+      
   1. Install the NGINX Javascript module (njs).  This is required for exporting Prometheus Metrics from NGINX Plus.
 
   ```bash
   yum install nginx-plus-module-njs
+
   ```
 
-  1. If you need a license for NGINX Plus, a 30-day Trial license is available here:
+  1. Install Nginx Javascript for Prometheus
+  ```bash
+  yum install nginx-plus-module-prometheus
 
-      https://www.nginx.com/free-trial-request/
+  ```
 
 <br/>
 

docs/http/split-test.conf

@@ -0,0 +1,121 @@
+# NGINX Loadbalancer for K8s HTTP configuration, for L7 load balancing
+# Chris Akker, Apr 2023
+# HTTP Proxy and load balancing
+# MultiCluster Load Balancing with http split clients 0-100%
+# Upstream servers managed by NLK Controller
+# Nginx Key Value store for Split ratios
+#
+#### clusters.conf
+
+# Define Key Value store, backup state file, timeout, and enable sync
+
+keyval_zone zone=split:1m state=/var/lib/nginx/state/split.keyval timeout=30d sync;
+keyval $host $split_level zone=split;
+
+# Main Nginx Server Block for cafe.example.com, with TLS
+
+server {
+   listen 443 ssl;
+   status_zone https://cafe.example.com;
+   server_name cafe.example.com;
+   
+   ssl_certificate /etc/ssl/nginx/default.crt;  # self-signed for example only
+   ssl_certificate_key /etc/ssl/nginx/default.key;
+   
+   location / {
+   status_zone /;
+   
+   proxy_set_header Host $host;
+   proxy_http_version 1.1;
+   proxy_set_header   "Connection" "";
+   proxy_pass https://$upstream;
+   
+   }
+
+   location @health_check_cluster1_cafe {
+
+   health_check interval=10 match=cafe;
+   proxy_connect_timeout 2s;
+   proxy_read_timeout 3s;
+   proxy_set_header Host cafe.example.com;
+   proxy_pass https://cluster1-https;
+   }
+ 
+   location @health_check_cluster2_cafe {
+
+   health_check interval=10 match=cafe;
+   proxy_connect_timeout 2s;
+   proxy_read_timeout 3s;
+   proxy_set_header Host cafe.example.com;
+   proxy_pass https://cluster2-https;
+   }
+}
+
+match cafe {
+  status 200-399;
+  }
+
+# Cluster1 upstreams
+
+upstream cluster1-https {
+   zone cluster1-https 256k;
+   least_time last_byte;
+   keepalive 16;
+   #servers managed by NLK Controller
+   state /var/lib/nginx/state/cluster1-https.state; 
+}
+
+# Cluster2 upstreams
+
+upstream cluster2-https {
+   zone cluster2-https 256k;
+   least_time last_byte;
+   #servers managed by NLK Controller
+   state /var/lib/nginx/state/cluster2-https.state; 
+}
+
+# HTTP Split Clients Configuration for Cluster1/Cluster2 ratios
+
+split_clients $request_id $split0 { 
+   * cluster2-https;
+   }
+
+split_clients $request_id $split1 { 
+   1.0% cluster1-https;
+   * cluster2-https;
+   }
+
+split_clients $request_id $split1000 { 
+   0.1% cluster1-https;
+   * cluster2-https;
+   }
+
+split_clients $request_id $split10000 { 
+   0.01% cluster1-https;
+   * cluster2-https;
+   }
+
+split_clients $request_id $split100000 { 
+   0.001% cluster1-https;
+   * cluster2-https;
+   }
+
+split_clients $request_id $split1000000 { 
+   0.0001% cluster1-https;
+   * cluster2-https;
+   }
+
+split_clients $request_id $split100 {
+   * cluster1-https;
+   }
+
+map $split_level $upstream { 
+   0 $split0;
+   1.0 $split1;
+   0.1 $split1000;
+   0.01 $split10000;
+   0.001 $split100000;
+   0.0001 $split1000000;
+   100 $split100;
+   default $split50;
+   }