HOST PREPARATION:\\
Combine the requirements below with the ones listed in the "Preparing the CentOS Host to Install vMX" in [[https://www.juniper.net/documentation/en_US/vmx/topics/topic-map/vmx-installing-on-kvm.html#id-preparing-the-ubuntu-host-to-install-vmx]]
\\
Verify that INTEL VT-d is enabled (note amd-v is not working for this!)
  cat /proc/cpuinfo | egrep -i vmx  # we Want this
  cat /proc/cpuinfo | egrep -i svm  # we Don't want this
Disable KSM by setting KSM_ENABLED=0 in /etc/default/qemu-kvm: \\
  systemctl disable ksm
  systemctl disable ksmtuned
\\
HUGEPAGES (x2 1G size)\\
[[https://mycompany2-base.com/articles/linux/configuring-huge-pages-for-mycompany2-on-linux-64]]
\\
  * For hugepages:
    * determine whether our system is UEFI. If this exists, is uefi: "cat /sys/firmware/efi/"

  vim /etc/default/grub
  # add this (one line):
  default_hugepagesz=1G hugepagesz=1G hugepages=number-of-numa-sockets intel_iommu=on"
  default_hugepagesz=1G hugepagesz=1G hugepages=50 intel_iommu=on"
  grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg
  [root@networklab01.ash.oci.mycompany1.co.uk ~]# grep Hugepagesize /proc/meminfo
  Hugepagesize:    1048576 kB
  
APIC and KSM:
Apic  [[https://access.redhat.com/solutions/58790|info]]


  cat /etc/qemu-kvm/target-x86_64.conf
  options kvm_intel nested=1 enable_apicv=0
  KSM_ENABLED=0

Or
  vim /etc/default/grub
  # add this:
  ... noapic"
  grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg
  
  
KVM INSTALL:\\
  * [[https://www.cyberciti.biz/faq/how-to-install-kvm-on-centos-7-rhel-7-headless-server/]]

  yum update
  yum install -y qemu-kvm libvirt libvirt-python libguestfs-tools virt-install
  systemctl enable libvirtd
  systemctl start libvirtd
  lsmod | grep -i kvm 
  

  * If we don't have root ssh access to the host, we need to add our user to the libvirt group so we can use virt-manager remotely:

  usermod -a -G libvirt jaime.santos.amandi

\\

INSTALL VAGRANT (NOT with vbox5.1_)\\
[[https://www.tecmint.com/how-to-install-vagrant-on-centos-7/]]
\\
  yum -y install https://releases.hashicorp.com/vagrant/2.2.6/vagrant_2.2.6_x86_64.rpm
  vagrant version && vagrant plugin list  # to check vagrant version
  yum install ./vagrant_2.2.5_x86_64.rpm    # download the last version 
\\
**Using The Libvirt Provider With Vagrant**\\
[[https://github.com/vagrant-libvirt/vagrant-libvirt]]
[[https://codingpackets.com/blog/using-the-libvirt-provider-with-vagrant]]

  yum install ruby-devel
  yum -y install qemu libvirt libvirt-devel ruby-devel gcc
  vagrant plugin install vagrant-libvirt  # works


Create virtual network for vagrant (for the management addresses):

  cat << EOF > /var/tmp/vagrant-libvirt-net.xml
  <network connections='1'>
    <name>vagrant-libvirt</name>
    <forward mode='nat'>
      <nat>
        <port start='1024' end='65535'/>
      </nat>
    </forward>
    <bridge name='virbr1' stp='on' delay='0'/>
    <ip address='192.168.121.1' netmask='255.255.255.0'>
      <dhcp>
        <range start='192.168.121.2' end='192.168.121.254'/>
      </dhcp>
    </ip>
  </network>
        
  EOF

  virsh net-define /var/tmp/vagrant-libvirt-net.xml
  virsh net-start vagrant-libvirt
  virsh net-autostart vagrant-libvirt

\\

[[https://github.com/vagrant-libvirt/vagrant-libvirt/blob/master/README.md]]

\\
Before virt-install , add vagrant-libvirt network from 
  service libvirtd restart
\\
For qemu permissions: [[https://github.com/jedi4ever/veewee/issues/996]] 



  ssh-keygen # upload key to gitlab
  eval $(ssh-agent -s)
  ssh-add ~/.ssh/*
  git clone git@gitlab.mycompany2datacloud.com:jaime.santos.amandi/junos-vmx-vagrant-virtual-lab.git
  git clone git@gitlab.mycompany2datacloud.com:jaime.santos.amandi/junos-vqfx-vagrant-virtual-lab.gi