Install CentOS 7.6 Minimal

Prerequisites

• Internet access and web browser
• VMware (Workstation or Player) or another VM platform
• The CentOS host should have the following firewall configuration:

  Direction	Port	Protocol	Source	Destination	Purpose
  Outbound	443	HTTPS	Open Collector	raw.githubusercontent.com	Identify latest container versions.
  Outbound	443	HTTPS	Open Collector	*.gcr.io	Download latest Open Collector software.
  Outbound	443	HTTPS	Open Collector	get.docker.com	Download docker repositories.
  Outbound	443	HTTPS	Open Collector	cloud.google.com	Pull container images.
  Outbound	443	HTTPS	Open Collector	storage.googleapis.com	Auto-update feature.
  Outbound	443	HTTPS	Open Collector	console.cloud.google.com	Auto-update feature.
  Outbound	514	TCP - Syslog	Open Collector	Windows System Monitor Agent	Syslog feed of data to LogRhythm SIEM.
  Outbound**	6514	TCP+TLS - Secure Syslog	Open Collector	Windows System Monitor Agent	Secure syslog feed of data to LogRhythm SIEM.
  Outbound	8076	TCP - Influx/Vitals	Open Collector	Platform Manager	Data feed for Centralized Metrics (LogRhythm 7.5+ only).
  Inbound	3000	HTTP	User machine	Open Collector	View Open Collector metrics in Grafana.
  Inbound	22	SSH	User machine	Open Collector	Interact with Open Collector.
  Inbound	5044	TCP - Lumberjack	Beats	Open Collector	Method to send data from Beats collected outside the Open Collector.

  **indicates optional setting

Install CentOS 7 Minimal

1. Download CentOS 7 Minimal from http://isoredirect.centos.org/centos/7/isos/x86_64/.
2. Create a VM with the following settings:
   • CPU: 8 cores (or more)
   • RAM: 8 GB (or more)
   • HDD: 50 GB (or more)
   • DVD: CentOS-7-x86_64-Minimal-1908.iso
   • User: In addition to the root user, create the following user:

     • username: logrhythm

     • password: <enter a password of your choice>

3. On initial boot, log in as the root user.

4. Add the new logrhythm user to the sudoers wheel:

   CODE

   usermod -aG wheel logrhythm

5. Reboot the VM, and log in as the logrhythm user.

OS Installation

1. Boot your VM with your installation media attached to the virtual CD-ROM drive (.iso format).
   

   

2. Select Install CentOS 7.
3. Wait for the media check to complete.
   

   

4. Once the CentOS 7 installer GUI starts, select your language localization settings, and click Continue.
   

   

   
   The Installation Summary screen appears.
   

   

5. In the System section, click Network & Host Name. (This is required to get networking on your VM without manual configuration.)
6. In the upper-right corner, click the toggle switch to On.  
   

   

   
   The VM retrieves an IP address and DNS settings using DHCP (IPs and MAC redacted for security reasons).
7. In the upper-left corner, click Done.
   The Installation Summary screen appears.
8. In the Localization section, click Date & Time.  
   The Date & Time screen appears.
   

   

9. Confirm the date and time are correct. 

   

   You can also use the Network Time (NTP) option (networking must be configured to use this option).
10. In the upper-left corner, click Done.
    The Installation Summary screen appears.
11. In the System section, click Installation Destination.  
    The Installation Destination screen appears.
    

    

12. Ensure your local disk is selected. The recommended disk capacity is 50GB.
13. In the upper-left corner, click Done.
    The Installation Summary screen appears
14. In the bottom-right corner, click Begin Installation.
15. During the installation process, you can configure a root password and additional users.
    

    

16. To set a root password, click Root Password.

17. Click User Creation, and create a logrhythm user with a strong password. 

    

    You can also create a logrhythm user manually after installation.

18. Once installation is complete, click Reboot in the lower-right corner.
    

    

    

    Make sure to remove the installation media. The method for removal is hypervisor-specific.