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• Internal Lab Network (RFC 1918 space)
• Internet access (NAT'd)
• IP routing in the Lab Network to reach VM interfaces

Software Prerequisites

Installation High-Level Overview

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1. Connect to Host Server iLO interface.
2. Start Virtual Console.
3. Mount Virtual Media with CentOS 7 ISO.
4. Install CentOS
   1. Assign correct IP address, Subnet, Gateway and DNS to the NIC.
   2. Include OpenSSH Server.
   3. Install KVM/virtualization.

Prepare Host Server for EMCO Deployment

Step 1. Enable sudo without entering sudo password

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Code Block
language bash
sudo -i visudo # Uncomment the line below %wheel ALL=(ALL) NOPASSWD: ALL

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Code Block
language bash
usermod –aG wheel onaplab

Step 3. Enable nested virtualization

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Code Block
language bash
# Login as super user sudo -i # Check for the following parameter cat /sys/module/kvm_intel/parameters/nested N # If it is Y, there is nothing else to be done. It is already enabled! # If it is N, do the following: # Edit /etc/default/grub file, and include kvm-intel.nested=1 GRUB_CMDLINE_LINUX parameter GRUB_CMDLINE_LINUX="crashkernel=auto console=ttyS0,38400n8,kvm-intel.nested=1" # Rebuild your GRUB configuration sudo grub2-mkconfig -o /boot/grub2/grub.cfg # Enable nested KVM capabilities in /etc/modprobe.d/kvm.conf # By uncommenting the below line options kvm_intel nested=1 ### Reboot the server reboot # Now, we should have the nested KVM capabilities enabled cat /sys/module/kvm_intel/parameters/nested Y

Step 4. Install VNC Server

Follow instructions at:

https://www.tecmint.com/install-and-configure-vnc-server-in-centos-7/

Step 5. Modify libvirt bridge IP and route mode

This will allow connecting to VMs and pods directly from the Lab Network. Please replace the sample IPs with your IP addresses.

cat <<\EOF >> netdefault.xml
<network>
  <name>default</name>
  <bridge name="vmbr0"/>
  <forward mode='route' dev='eno24'/>
 # <forward/>
  <ip address="10.121.7.129" netmask="255.255.255.224">
    <dhcp>
      <range start="10.121.7.144" end="10.121.7.158"/>
    </dhcp>
  </ip>
</network>
EOF

sudo virsh net-list
sudo virsh net-destroy default
sudo virsh net-undefine default
sudo virsh net-define netdefault.xml
sudo virsh net-start default
sudo virsh net-autostart default

Add necessary routes to your Lab Network routers. The example below assumes the the Host Server IP address is 10.121.1.12:

ip route 10.121.7.128 255.255.255.224 10.121.1.12

Deploy EMCO

Deployment Verification

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