KVM3: Configuring the system

gistfile1.txt

# In The Name Of Allah .
# -- --- ---- -- ----- -
# Sun Nov  8 07:42:54 2020
# Written By : zer0err0r .
# ======= == = ========= =

# 3, Configuring The System .

  # Adding our user to [libvirt] group :
    $ usermod -aG libvirt zer0err0r
  
  # Relogin or start a new bash session, Or execute :
    $ newgrp libvirt


  # Set system_DBus aliases instead of session_DBus :
    $ vim ~/.bashrc
      alias virsh="virsh --connect 'qemu:///system'"
      alias virt-install="virt-install --connect 'qemu:///system'"
      alias virt-top="virt-top --connect 'qemu:///system'"
      alias virt-clone="virt-clone --connect 'qemu:///system'"
      alias virt-manager="virt-manager --connect 'qemu:///system'"
      alias virt-viewer="virt-viewer --connect 'qemu:///system'"
    $ source ~/.bashrc

    # For remote :
      $ vim ~/.bashrc
        alias virsh="virsh --connect 'qemu+ssh://user@ip/system'"
      = Then set a passwordless authentication with the remote hypervisor host .
        - Just use [ssh-keygen, ssh-copy-id] commands .


  # Set a bridged connection :
    = Attention, Use an ethernet cable .
    = Most wifi cards will get you into the promiscous_mode issue .
    $ sudo -i
    $ echo 'BRIDGE=br0' >> /etc/sysconfig/network-scripts/ifcfg-ens3
    $ vim /etc/sysconfig/network-scripts/ifcfg-br0
      DEVICE="br0"
      BOOTPROTO=static
      IPADDR=192.168.100.102
      NETMASK=255.255.255.0
      NETWORK=192.168.100.0
      GATEWAY=192.168.100.1
      DNS1=8.8.8.8
      IPV6INIT="yes"
      IPV6_AUTOCONF="yes"
      ONBOOT="yes"
      TYPE="Bridge"
      DELAY="0"
    $ sudo systemctl restart NetworkManager
    = From now on, We should not configure [ens3] at all, We configure [br0] instead .
    = [br0] is the master now while [ens3] is a member[slave] of it .
  
  # [nmcli] method :
    = I need to test it first before recording it .
    = I will explain it later ISA .

  
  # Enable port forwarding :
    $ echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf
    $ sysctl -p /etc/sysctl.conf


# ===== == ==== ======== =
# Peace Be Up0n Muhammed .