Install NGINX.

yum install epel-release
yum install nginx

Install PHP.

If the host machine's underlying operating system is CentOS 7.x, install PHP7.3, because the default PHP version on CentOS 7 is PHP 5.4, which isn't supported by Matomo.

yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm
yum install --enablerepo=remi-php73 php php-mcrypt php-cli php-gd php-curl php-mysql php-ldap php-zip php-fileinfo php-fpm php-mbstring php-dom php-xml php-simplexml

Create a user and database for Matomo and connect it to Unravel. Perform only one of the following steps based up the database you are using.

Configure PHP.

On the Matomo host, edit /etc/php-fpm.d/www.conf as follows:

1. Change these lines:

   Old	New
   user = apache	user = nginx
   group = apache	group = nginx

2. Add the following line after listen = 127.0.0.1:9000.

   listen = /var/run/php-fpm/php-fpm.sock

3. Change these lines (notice the removal of the semicolon):

   Old	New
   ;listen.owner = nobody	listen.owner = nginx
   ;listen.group	listen.group = nginx
   ;listen.mode = 0660	listen.mode = 0660

Configure nginx.

1. On the Matomo host, create the directory /etc/nginx/snippets.

   mkdir /etc/nginx/snippets

2. Create /etc/nginx/snippets/fastcgi-php.conf with the contents shown below.

   fastcgi_connect_timeout 60;
   fastcgi_send_timeout 180;
   fastcgi_read_timeout 180;
   fastcgi_buffer_size 512k;
   fastcgi_buffers 512 16k;
   fastcgi_busy_buffers_size 1m;
   fastcgi_temp_file_write_size 4m;
   fastcgi_max_temp_file_size 4m;
   fastcgi_intercept_errors off;
   
   fastcgi_param SCRIPT_FILENAME   $request_filename;
   fastcgi_param PATH_INFO         $fastcgi_path_info;
   fastcgi_param PATH_TRANSLATED   $document_root$fastcgi_path_info;
   fastcgi_param QUERY_STRING      $query_string;
   fastcgi_param REQUEST_METHOD    $request_method;
   fastcgi_param CONTENT_TYPE      $content_type;
   fastcgi_param CONTENT_LENGTH    $content_length;
   fastcgi_param SCRIPT_NAME       $fastcgi_script_name;
   fastcgi_param REQUEST_URI       $request_uri;
   fastcgi_param DOCUMENT_URI      $document_uri;
   fastcgi_param DOCUMENT_ROOT     $document_root;
   fastcgi_param SERVER_PROTOCOL   $server_protocol;
   fastcgi_param REQUEST_SCHEME    $scheme;
   fastcgi_param HTTPS             $https if_not_empty;
   fastcgi_param HTTP_PROXY        "";
   fastcgi_param GATEWAY_INTERFACE CGI/1.1;
   fastcgi_param SERVER_SOFTWARE   nginx/$nginx_version;
   fastcgi_param REMOTE_ADDR       $remote_addr;
   fastcgi_param REMOTE_PORT       $remote_port;
   fastcgi_param SERVER_ADDR       $server_addr;
   fastcgi_param SERVER_PORT       $server_port;
   fastcgi_param SERVER_NAME       $server_name;
   fastcgi_param REDIRECT_STATUS   200;

3. Create /etc/nginx/conf.d/matomo.conf with the contents shown below.

   server {
       listen [::]:80; # remove this if you don't want Matomo to be reachable from IPv6
       listen 80;
       server_name YOUR_SERVER.YOUR_DOMAIN; # list all domains Matomo should be reachable from
       access_log /var/log/nginx/matomo.access.log;
       error_log /var/log/nginx/matomo.error.log;
   
       ## uncomment if you want to enable HSTS with 6 months cache
       ## ATTENTION: Be sure you know the implications of this change (you won't be able to disable HTTPS anymore)
   #    add_header Strict-Transport-Security max-age=15768000;
   
       ## replace with your SSL certificate
   #    ssl_certificate /path/to/fullchain.pem;
   #    ssl_certificate_key /path/to/privkey.pem;
   #    include ssl.conf; # if you want to support older browsers, please read through this file
   
       add_header Referrer-Policy origin; # make sure outgoing links don't show the URL to the Matomo instance
       
       root /var/www/matomo/; # replace with path to your matomo instance
       
       index index.php;
           
       ## only allow accessing the following php files
       location ~ ^/(index|matomo|piwik|js/index).php {
           include snippets/fastcgi-php.conf; # if your Nginx setup doesn't come with a default fastcgi-php config replace this with the one from this repository
           fastcgi_param HTTP_PROXY ""; # prohibit httpoxy: https://httpoxy.org/
           fastcgi_pass unix:/var/run/php-fpm/php-fpm.sock; #replace with the path to your PHP socket file
           #fastcgi_pass 127.0.0.1:9000; # uncomment if you are using PHP via TCP sockets
       }
       
       ## needed for HeatmapSessionRecording plugin
       location = /plugins/HeatmapSessionRecording/configs.php { 
           include snippets/fastcgi-php.conf;
           fastcgi_param HTTP_PROXY "";
           fastcgi_pass unix:/var/run/php-fpm/php-fpm.sock; #replace with the path to your PHP socket file
   #       fastcgi_pass 127.0.0.1:9000; # uncomment if you are using PHP via TCP sockets
       }
       
       ## deny access to all other .php files
       location ~* ^.+\.php$ {
           deny all;
           return 403;
       }
   
       ## serve all other files normally
       location / {
           try_files $uri $uri/ =404;
       }
       
       ## disable all access to the following directories
       location ~ /(config|tmp|core|lang) {
           deny all;
           return 403; # replace with 404 to not show these directories exist
       }
       location ~ /\.ht {
           deny  all;
           return 403;
       }
   
       location ~ \.(gif|ico|jpg|png|svg|js|css|htm|html|mp3|mp4|wav|ogg|avi|ttf|eot|woff|woff2|json)$ {
           allow all;
           ## Cache images,CSS,JS and webfonts for an hour
           ## Increasing the duration may improve the load-time, but may cause old files to show after an Matomo upgrade
           expires 1h;
           add_header Pragma public;
           add_header Cache-Control "public";
       }
   
       location ~ /(libs|vendor|plugins|misc/user) {
           deny all;
           return 403;
       }
   
       ## properly display textfiles in root directory
       location ~/(.*\.md|LEGALNOTICE|LICENSE) {
           default_type text/plain;
       }
   }
   

4. In /etc/nginx/conf.d/matomo.conf, replace server_name with the name of your Matomo server.

On the Matomo host, enable and start all services.

systemctl enable php-fpm
systemctl start php-fpm
systemctl enable nginx
systemctl start nginx

On the Matomo host, install Matomo.

1. Download the latest version of Matomo.

   curl https://builds.matomo.org/matomo-latest.tar.gz -o /tmp/matomo-latest.tar.gz

2. Install it in /var/www.

   tar zxf /tmp/matomo-latest.tar.gz -C /var/www/

3. Change the owner to nginx.

   chown -R nginx /var/www/

Configure Matomo.

Using a web browser, go to http://server_name (as configured in /etc/nginx/conf.d/matomo.conf) and enter the following information at the prompts.

Confirm Matomo's connection to Unravel.

On the Matomo UI, you should see the dashboard, which gives you a single pane of glass overview of Unravel UI usage:

Visitors | Visits Log shows you what pages visitors have looked at in Unravel UI.