Virtual Machine Preparation

1. Request OpenShift 4 Client VM from labs.opentlc.com

   

   prepare vm
2. You'll get an email after VM gets provisioned successfully. SSH to VM with the credential in the mail.

   

   prepare vm
3. After login to VM, switch to root user with this command.

   sudo -i

4. Verify if podman is installed.

   podman version

   Sample output:

   Version:            1.6.4
   RemoteAPI Version:  1
   Go Version:         go1.12.12
   OS/Arch:            linux/amd64

5. Install firewalld with this command so you can configure firewall rule.

   yum install -y firewalld

6. Start firewalld service with this command.

   systemctl start firewalld

7. Verify if firewalld service started successfully.

   systemctl status firewalld

   Sample output:

   ● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2022-10-25 15:39:44 UTC; 49min ago
       Docs: man:firewalld(1)
   Main PID: 30795 (firewalld)
   CGroup: /system.slice/firewalld.service
           └─30795 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopid

8. Allow incomming traffic on port 80.

   firewall-cmd --zone=public --add-port=80/tcp --permanent
   firewall-cmd --reload