Set Up a Load Balancer for Orchestrator Clustering › NGINX Load Balancer › Configure NGINX Load Balancer for Agent Scalability

Configure NGINX Load Balancer for Agent Scalability

You can configure NGINX load balancer to increase the number of agents in a cluster setup for secure and non-secure communication.

Follow these steps:

1. Navigate to the folder (for example, nginx_install_dir/conf/NGINX.conf) that contains the NGINX.conf file.
2. Add the worker_rlimit_nofile property and set the value to 30000 in the NGINX.conf file.
3. Add the accept_mutex property in the NGINX.conf file as follows:

   events {
       accept_mutex off;}
   

4. Edit the worker_connections and the worker_processes property value in the NGINX.conf file based on the following factors:
   • Number of agents you want to install
   • Number of processors

   wherein:

   • worker_connections: Indicates the maximum number of simultaneous connections that a worker process establishes.
   • worker_processes: Indicates the optimal value that depends on the number of CPU cores.

   For example:

   To find out the number of cores in your setup; enter the following command using the Linux Shell prompt:

   grep processor /proc/cpuinfo | wc –l

   Assuming the value that is returned from the command is "2". That means, the number of CPU cores in the server of your setup is 2.

   The value of worker_connections is calculated as follows:

   Wc = 2NA/Wp

   Where:

   N=Total number of nodes in a cluster.

   A=Total number of agents you want to install.

   Wp=Total number of CPU processors as calculated in step 4.

   • Example 1:

     When you want to install 4000 agents in a two-node cluster setup and the number of CPU cores in the server of your setup is 2, edit the worker_processes property to 2.

     Substituting the values in the formula:

     Wc = 2*2*4000)/2

     To install 4000 agents, edit the worker_connections property to 8000.

   • Example 2:

     When you want to install 2500 agents with a standalone orchestrator and the number of CPU cores in the server of your setup is 4, edit the worker_processes property to 4.

     Substituting the values in the formula:

     Wc = 2*1*2500/4

     To install 2500 agents, edit the worker_connections property to 1250.

   • Example 3:

     When you want to install 3000 agents in a three-node cluster setup and the number of CPU cores in the server of your setup is 1, edit the worker_processes property to 1.

     Substituting the values in the formula:

     Wc = 2*3*3000/1

     To install 3000 agents, edit the worker_connections property to 18000.

5. Restart the NGINX load balancer.