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kvm [2021/06/28 01:25] – vissiekvm [2023/06/01 00:52] (current) – [Debian] vissie
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 Some network advanced stuff: [[https://www.linuxtechi.com/install-configure-kvm-debian-10-buster/|https://www.linuxtechi.com/install-configure-kvm-debian-10-buster/]] Some network advanced stuff: [[https://www.linuxtechi.com/install-configure-kvm-debian-10-buster/|https://www.linuxtechi.com/install-configure-kvm-debian-10-buster/]]
 <code> <code>
-sudo apt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils+ 
 +sudo apt install --no-install-recommends qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils virtinst dnsmasq qemu-utils ovmf 
 +#  Some apps does not get installed with --no-install-recommends and seemds to be added: qemu-utils dnsmasq 
 +# ovmf is for uf
 sudo systemctl status libvirtd.service sudo systemctl status libvirtd.service
 sudo virsh net-list --all sudo virsh net-list --all
 sudo modprobe vhost_net sudo modprobe vhost_net
 +
 </code> </code>
  
Line 17: Line 21:
 sudo virsh net-start default sudo virsh net-start default
 sudo virsh net-autostart default sudo virsh net-autostart default
 +
 </code> </code>
 +
 +=====Stop all iptables rules=====
 +I had issues where these rules were interfering with my iptables manual rules. This worked
 +  So edit your network (virsh net-edit) to <forward mode='open'/>.
 +
 +
  
 If you want to offload the mechanism of “virtio-net” and want to improve the performance of KVM VMs then add “vhost_net” kernel module on your system using the beneath command, If you want to offload the mechanism of “virtio-net” and want to improve the performance of KVM VMs then add “vhost_net” kernel module on your system using the beneath command,
Line 24: Line 35:
 echo "vhost_net" | sudo  tee -a /etc/modules echo "vhost_net" | sudo  tee -a /etc/modules
 lsmod | grep vhost lsmod | grep vhost
 +
 </code> </code>
 <code> <code>
 +
 host_net               24576  0 host_net               24576  0
 vhost                  49152  1 vhost_net vhost                  49152  1 vhost_net
 tap                    28672  1 vhost_net tap                    28672  1 vhost_net
 tun                    49152  2 vhost_net tun                    49152  2 vhost_net
 +
 </code> </code>
 +
 Note: If you want a normal user to use virsh commands then add that user to libvirt and libvirt-qemu group using the following commands Note: If you want a normal user to use virsh commands then add that user to libvirt and libvirt-qemu group using the following commands
 +
 <code> <code>
 sudo adduser pkumar libvirt sudo adduser pkumar libvirt
 sudo adduser pkumar libvirt-qemu sudo adduser pkumar libvirt-qemu
 +
 </code> </code>
 +
 To refresh or reload group membership run the followings, To refresh or reload group membership run the followings,
 +
 <code> <code>
 newgrp libvirt newgrp libvirt
 newgrp libvirt-qemu newgrp libvirt-qemu
 +
 </code> </code>
 +
 +======Setup Bridges Network======
 +  sudo vim /etc/network/interfaces
 +<sxh bash; gutter: false>  
 +# This file describes the network interfaces available on your system
 +
 +source /etc/network/interfaces.d/*
 +
 +# The loopback network interface
 +auto lo
 +iface lo inet loopback
 +
 +# The primary network interface
 +# allow-hotplug enp0s31f6
 +#iface enp0s31f6 inet dhcp
 +#auto enp0s31f6
 +
 +auto br0
 +iface br0 inet dhcp
 +    bridge_ports enp0s31f6
 +    bridge_stp off
 +    bridge_fd 0
 +    bridge_maxwait 0   
 +</sxh>
  
 ====== Allow ping in host====== ====== Allow ping in host======
Line 130: Line 174:
   virsh setmem <vm_name> <memsize> --config   virsh setmem <vm_name> <memsize> --config
  
 +I'll test this at some point too:
 +  sudo virsh setvcpus --domain test --maximum 2 --config
 +  sudo virsh setvcpus --domain test --count 2 --config
 +  sudo virsh reboot test
 +
 +Please remember to SWITCH OFF the VM, and back on for the changes to take affect.
 ====error: Requested operation is not valid: cannot undefine domain with nvram==== ====error: Requested operation is not valid: cannot undefine domain with nvram====
 <code>sudo virsh undefine --nvram nameofvm</code> <code>sudo virsh undefine --nvram nameofvm</code>
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 </code> </code>
  
 +
 +<code>
 +qemu-system-x86_64 \
 +  -boot d \
 +  -cdrom "Bliss-v14.10-x86_64-OFFICIAL-opengapps-20221027.iso" \
 +  -bios /usr/share/ovmf/x64/OVMF.fd \
 +  -nodefaults \
 +  -enable-kvm \
 +  -smp 8 \
 +  -device intel-hda \
 +  -device hda-duplex \
 +  -device virtio-vga-gl \
 +  -net nic \
 +  -net user,hostfwd=tcp::5555-:5555 \
 +  -cpu host \
 +  -m 4096 \
 +  -display sdl,gl=on \
 +  -hda Android.img
 +</code>
 ===== Stop a running domain ===== ===== Stop a running domain =====
 <code> <code>
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 +=====Convert===== 
 +  qemu-img convert -f vdi -O qcow2 ./Lineage.vdi ./Lineage.qcow2
  
  
kvm.1624868744.txt.gz · Last modified: 2021/06/28 01:25 by vissie

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