Adjustments, apt key and repo line fixes. Added OpenSearch service parameters.

graylog/readme.md

@@ -1,3 +1,9 @@
+# Requirements:
+
+This script makes no additional requirments other than the following. The script will automatically install all dependencies and make the additional required system modifications.
+
+# Installation:
+
 To run this script:
 
 1. Use wget to grab the latest version:
@@ -6,10 +12,40 @@ To run this script:
 
 2. CHMOD the script to make it executable:
    
-   `chmod +x install.sh`
+   `sudo chmod +x install.sh`
 
 3. Run the script:
    
-   `./install.sh`
+   `sudo ./install.sh`
+
+# Script Process:
+
+This script makes the following checks (in order):
+
+Checks the script is being run as root.
+
+Installs required dependencies.
+
+Checks the system meets the minimum system requirements.
+
+Disables Huge Pages Support if Enabled (OpenSearch).
+
+Sets Maximum File Count (OpenSearch).
+
+Adds all required respitory keys & Updates the package index.
+
+Adds the OpenSearch user.
+
+Installs OpenSearch.
+
+Creates required OpenSearch directories & log file. Ensures their permissions.
+
+Installs MongoDB.
+
+Installs Graylog
+
+
+
+