Setting up the CentOS 8KVM hypervisor and CentOS virtual machine
Setting up the CentOS 8KVM hypervisor and CentOS virtual machine
CentOS installation
Install the OS on the server machine by various methods We connect the display and mouse and install from the USB memory with GUI Server installation Allocate to / usr / local
network settings
Fixed IP 192.168.1.50/24
[root@centos8 ~]# nmcli connection modify ens3 ipv4.address 192.168.10.50/24
Default gateway 192.168.1.1
[root@centos8 ~]# nmcli connection modify ens3 ipv4.gateway 192.168.10.1
dns 192.168.1.1
[root@centos8 ~]# nmcli connection modify ens3 ipv4.dns 192.168.10.1
Fixed device
[root@centos8 ~]# nmcli connection modify ens3 ipv4.method manual
Reboot the configured device
nmcli connection up
Change host name (no reboot)
sudo hostnamectl set-hostname kvm.flownetsecure.com
yum update
yum update
KVM installation
Install KVM and related packages
dnf update
dnf install @virt
dnf install virt-top libguestfs-tools
dnf install qemu-kvm libvirt virt-install
systemctl enable --now libvirtd
Create a bridge interface (br0)
nmcli con add type bridge ifname br0 con-name br0
Connection'br0' (ef4529c7-d511-4331-a193-8150e1ed707e)Was added successfully.
Display / confirmation of connection
# nmcli con show
NAME UUID TYPE DEVICE
br0 ef4529c7-d511-4331-a193-8150e1ed707e bridge br0
enp2s0 c72c2593-0ddb-4cb1-93cb-5863cdd76c11 ethernet enp2s0
virbr0 e18f2616-7c18-4cde-88d0-18dd8bcb1b86 bridge virbr0
Set the IP address, gateway, and DNS in br0 (this will be the KVM address)
nmcli con mod br0 bridge.stp no
nmcli con mod br0 ipv4.method manual ipv4.address "192.168.10.51/24" ipv4.gateway "192.168.10.1" ipv4.dns 192.168.10.1
Create virtual bridge
nmcli con add type bridge-slave ifname eno1 con-name eno1-br0 master br0
nmcli con show
NAME UUID TYPE DEVICE
br0 ef4529c7-d511-4331-a193-8150e1ed707e bridge br0
enp2s0 c72c2593-0ddb-4cb1-93cb-5863cdd76c11 ethernet enp2s0
virbr0 e18f2616-7c18-4cde-88d0-18dd8bcb1b86 bridge virbr0
eno1-br0 863898d3-004a-4fb4-ab5f-e83767bd6442 ethernet --
eno1-br0 is added
Delete physical port
nmcli con del eno1
Reboot
reboot
nmcli con show
NAME UUID TYPE DEVICE
br0 8f659364-cbe0-4c6e-8211-c3091e6c0942 bridge br0
virbr0 f463bfbb-0030-4fd4-b42b-ccdf528e5718 bridge virbr0
bridge-slave-enp2s0 45c0907e-6db7-41ae-a11d-763448dc36e0 ethernet enp2s0
KVM completed!
Create a virtual machine on KVM
Creating a storage pool (storage location for virtual machine images)
# mkdir -p /var/kvm/images
Virtual machine installation
VM_NAME="compute-vm01"
virt-install
--name ${VM_NAME}
--hvm
--arch x86_64
--os-type linux
--os-variant centos8
--vcpus 1
--ram 8192
--disk path=/var/lib/libvirt/images/${VM_NAME}.img,format=qcow2,size=284
--network bridge=br0
--graphics vnc,keymap=ja
--noautoconsole
--location /iso/centos82.iso
--check all=off
--extra-args ro
Starting install...
Installation will start
Without `` `--extra-args ro```, the following error will occur during virtual OS installation
The following error occurred during installation: Cancel the installation as it will result in a fatal error.
DNF error: Error in POSTTRANS scriptlet in rpm package Kernel-core
Browser connection to Cockpit of host OS (http://192.168.10.51:9090/)
log in
Connect to the created virtual machine and continue installing the virtual machine OS
