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kvm_centos.md

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Setup KVM and Install Centos VM with Console Access

yum install epel-release
yum update
yum install qemu libvirt libvirt-devel ruby-devel gcc qemu-kvm
yum groupinstall "Development Tools"
yum groupinstall "Virtualization Tools"
yum install virt-install libvirt-python virt-manager virt-install libvirt-client

Setup Image Location

mkdir /home/admin/KVM
su - root
semanage fcontext -a -t virt_image_t '/home/admin/KVM(/.*)?'
restorecon /home/admin/KVM
rmdir /var/lib/libvirt/images
ln -s /home/admin/KVM /var/lib/libvirt/images

Create Image File and deploy

cd /home/admin/KVM
wget http://mirrors.mit.edu/centos/7/isos/x86_64/CentOS-7-x86_64-Minimal-1708.iso
qemu-img create -f qcow2 /home/admin/KVM/vm1.qcow2 20G
virt-install --virt-type kvm --vcpu 2 --name vm1 --ram 4096 \
  --disk /home/admin/KVM/vm1.qcow2,format=qcow2   --network network=default \
  --graphics vnc,listen=0.0.0.0 --noautoconsole  \
  --os-type=linux --os-variant=centos7.0 \
  --location=/home/admin/KVM//CentOS-7-x86_64-Minimal-1708.iso

Go to your server and go through the installation process. Log into your serve and get the IP address and SSH.

Setup Console Access (Run these commands on the vm1)

yum install acpid
systemctl enable acpid
echo "NOZEROCONF=yes" >> /etc/sysconfig/network
vi /etc/default/grub
  • Make the line look like this:
GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap console=tty0 console=ttyS0, 115200n8"
  • Enable the Console Access:
grub2-mkconfig -o /boot/grub2/grub.cfg
exit
  • Reboot the VM
virsh reboot vm1