Preparing the Host and the Client

Use this information to install required tools on the host and the client.

Before you begin

Make sure that you have:

Disabled the firewall on the host and the client.
```
systemctl disable --now firewalld
```

About this task

Note: The following prompts are used to indicate which part of the system to run the provided commands on.

host#: The server where the IPU is installed.
client#: The remote server where user traffic is generated.

Procedure

On the host, install nginx.
It is required to run two nginx instances on the host: one as a web server, the other as a proxy. When the test script is executed, the web server script http_obj_gen.py is copied using scp from the test server to the destination path /usr/share/nginx/ on the host. The test script ensures that the correct nginx configuration is applied. Various configuration files are stored in the nginx/ directory.
Install nginx using the following command.
```
host# dnf install nginx
```

Check the installed nginx version.

host# nginx -v
nginx version: nginx/1.24.0

To ensure compatibility with the nginx configuration, make sure you have nginx version 1.24 or newer.

If the installed version is older than 1.24, install the latest version as follows.

# Remove the existing version.
host# dnf remove nginx

# Install prerequisites.
host# yum install yum-utils

# Create a file.
host# vim /etc/yum.repos.d/nginx.repo

Copy and paste the following content into the file to set up the yum repository.

[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true

[nginx-mainline]
name=nginx mainline repo
baseurl=http://nginx.org/packages/mainline/centos/$releasever/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true

Install nginx.

host# yum install nginx

For more information on installing nginx, see the official documentation at https://nginx.org/en/linux_packages.html#RHEL.

On the host, install required tools.
```
host# dnf install sysstat
host# dnf install python3-pip
host# pip3 install numpy
host# dnf install net-tools
```
The following tools are required.
- sar : Used for logging. The tool is included in the sysstat package.
- numpy: Installed using pip3.
- nstat and netstat: Typically installed on most Linux systems.
On the client, install required tools.
```
client# dnf install lua-devel luajit-devel
client# git clone https://github.com/wg/wrk.git
client# cd wrk
client# make
client# cp wrk /usr/local/bin/
client# dnf install sysstat
```
The following tools are required.
- sar: Used for logging. The tool is included in the sysstat package.
- wrk: It is an HTTP benchmarking tool. The customized query.lua script is used with wrk. The test script copies the query.lua script to the <WRK_PATH>/scripts/ directory. The query.lua script can be found in the wrk/directory of the Link-Security™ Software package.
  Note: WRK_PATH is configured in constants.py. See Step 7 in Configuring the Test Server.
  
  Note: The setup is tested with wrk 4.2.
- nstat and netstat: Typically installed on most Linux systems.