Author: Aysad Kozanoglu
supported : Debian Jessie 8.x, ubuntu 16.04, 18.04
tested on : online.net > pro-6-M dedicated
https://github.com/AysadKozanoglu/Cloud_Virtualisation_Auto_installer/wiki
KVM Virtualisation full headless install and guest vm management
apt-get install qemu-kvm libvirt-bin virt-manager virtinst bridge-utils cpu-checker libguestfs-tools libosinfo-binapt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils virt-manager libguestfs-tools libosinfo-bin
nameserver 8.8.8.8
nameserver 8.8.4.4
https://www.realvnc.com/en/connect/download/viewer/linux/
iptables -t nat -A PREROUTING -i eno1 -p tcp --dport 5900 -j DNAT --to 127.0.0.1:5900
sysctl -w net.ipv4.ip_forward=1
sysctl -p /etc/sysctl.conf https://aboullaite.me/kvm-qemo-forward-ports-with-iptables/
do it for every libvirt bridge nat ip that need access incoming request from internet
iptables -I FORWARD -o virbr0 -d 192.168.122.49 -j ACCEPT- onliner for all ip nat forwarding on nic for all vms
virsh net-dhcp-leases default | grep 192.168 | awk '{print $5}' | cut -d \/ -f1 | while read ips; do iptables -I FORWARD -o virbr0 -d $ips -j ACCEPT; done; iptables-save | grep 192.168;
iptables -t nat -I PREROUTING -p tcp --dport 9867 -j DNAT --to 192.168.122.36:22iptables -t nat -A PREROUTING -d 212.83.147.148 -j DNAT --to-destination 192.168.122.49
iptables -t nat -A POSTROUTING -s 192.168.122.49 -j SNAT --to-source 212.83.147.148Beispiel:
virt-install \
--virt-type=kvm \
--name debian8-11-1 \
--ram 2048 \
--vcpus=2 \
--os-type linux \
--os-variant generic \
--virt-type=kvm \
--hvm \
--cdrom=/var/lib/libvirt/boot/debian-8.11.0-amd64-netinst.iso \
--network=bridge=virbr0,model=virtio \
--graphics vnc \
--disk path=/var/lib/libvirt/images/debian-8-11-1amd64.qcow2,size=40,bus=virtio,format=qcow2virsh destroy win10-1 && virsh undefine win10-1virt-install --name debianJessie2 --ram=512 --vcpus=1 --cpu host --disk path=/var/lib/libvirt/images/debianVM2,size=8,bus=virtio,format=qcow2 --cdrom /var/lib/libvirt/boot/debian-8.11.0-amd64-netinst.iso --graphics vncvmname="vm1-debian8"; virt-install --name $vmname --ram=512 --vcpus=1 --cpu host --disk path=/var/lib/libvirt/images/${vmname}.qcow2,size=8,bus=virtio,format=qcow2 --cdrom /var/lib/libvirt/isos/debian-8.11.0-amd64-netinst.iso --graphics=vnc,port=5951,password=!PASSWORD! --network=bridge=virbr0,model=virtiolocation parameter is needed for the console installation location links are image repo links from distro images
OS="preesed-debian8";
virt-install --connect=qemu:///system --name=${OS} --ram=1024 --vcpus=2 --disk path=/var/lib/libvirt/images/$OS,size=8,bus=virtio,format=qcow2 --initrd-inject=preseed.cfg --location http://ftp.de.debian.org/debian/dists/jessie/main/installer-amd64 --os-type linux --os-variant debian8 --controller usb,model=none --graphics none --noautoconsole --network bridge=virbr0 --extra-args="auto=true hostname="${OS}" domain="vm1.yourserver.com" console=tty0 console=ttyS0,115200n8 serial"apt install libosinfo-bin
osinfo-query os
virt-install --os-type=windows --os-variant=win8.1 --name win10-9 --ram=2048 --vcpus=1 --cpu host --disk path=/var/lib/libvirt/images/win10-9,size=40,bus=virtio,format=qcow2 --disk /var/lib/libvirt/boot/win1064bit.iso,device=cdrom --disk /var/lib/libvirt/boot/virtIO-drivers.iso,device=cdrom --graphics=vnc,port=5952,password=!PASSWORD! --check all=offhttps://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/virtio-win.iso
KVM Guest Drivers for Windows project files : KVM Guest Drivers for Windows
$ vim newnetwork.xml
<network>
<name>newnetwork-1</name>
<uuid>d0e9964a-f91a-40c0-b769-a609aee41bf2</uuid>
<forward mode='nat'>
<nat>
<port start='1' end='65535'/>
</nat>
</forward>
<bridge name='virbr1' stp='on' delay='0' />
<mac address='52:54:00:60:f8:6e'/>
<ip address='192.168.142.1' netmask='255.255.255.0'>
<dhcp>
<range start='192.168.142.2' end='192.168.142.254' />
</dhcp>
</ip>
</network> $ virsh net-define newnetwork.xml $ virsh net-start newnetwork-1
$ virsh net-autostart newnetwork-1 $ virsh net-list
Name State Autostart Persistent
----------------------------------------------------------
default active yes yes
newnetwork-1 active yes yes $ brctl show
bridge name bridge id STP enabled interfaces
virbr0 8000.5254003339b3 yes virbr0-nic
virbr1 8000.52540060f86e yes virbr1-nicvirsh net-list
virsh net-destroy default
virsh net-undefine default
service libvirtd restart
ifconfigftp://libvirt.org/libvirt/virshcmdref/html/sect-net-dumpxml.html
virsh net-dhcp-leases default | grep testvm | awk '{ print $5}'
virsh domiflist vm5-debian
Interface Type Source Model MAC
-------------------------------------------------------
vnet1 network default rtl8139 52:54:00:45:87:e6
arp -e
192.168.122.194 ether 52:54:00:45:87:e6
vmname="vm5-debian"; arp -e | grep $(virsh domiflist $vmname| grep vnet | awk '{print $5}') | awk '{print $1}'cat /var/lib/libvirt/dnsmasq/virbr0.status
virsh net-edit default
...
<dhcp>
<range start='192.168.122.100' end='192.168.122.254'/>
<host mac='52:54:00:6c:3c:01' name='vm1' ip='192.168.122.11'/>
...
</dhcp>- reboot the VM or network from vm (ipdown eth0; ifup eth0)
- if not works than
- virsh net-destroy $NETWORK_NAME
- virsh net-start $NETWORK_NAME
- if not works than
- than restart vm dhcp client
- if not works than
- stop the libvirtd service
- kill any dnsmasq processes that are still alive
- start the libvirtd service
- if not works than
- Important: if you change the of an existing static mac ip assign rule (.xml)
- then you to redefine the bridge
- create accepting nat forwarding on nic for vm ips again
- restart the vm(s)
virsh net-destroy default && virsh net-undefine default && virsh net-define /etc/libvirt/networks/default.xml && virsh net-start default && virsh net-autostart default; /etc/init.d/libvirt-bin restart; COMMAND=shutdown; virsh list | grep vm | awk '{print $2}' | while read vmname; do virsh $COMMAND $vmname; sleep 3; done; watch 'virsh list'; COMMAND=start; virsh list --all | grep vm | awk '{print $2}' | while read vmname; do virsh $COMMAND $vmname; sleep 3; done; watch 'virsh list'
# shutdown
COMMAND=shutdown; virsh list | grep vm | awk '{print $2}' | while read vmname; do virsh $COMMAND $vmname; sleep 3; done; watch 'virsh list'
#start
COMMAND=start; virsh list --all | grep vm | awk '{print $2}' | while read vmname; do virsh $COMMAND $vmname; sleep 3; done; watch 'virsh list'apt install libguestfs-tools
virsh shutdown < vmname >
virsh dumpxml debian9-vm1 | grep 'source file'
...
<source file='/var/lib/libvirt/images/debian9-vm1.qcow2'/>
...
openssl passwd -1 newrootPassword
guestfish --rw -a /var/lib/libvirt/images/debian9-vm1.qcow2
><fs>
>launch
>list-filesystems
>mount /dev/sda1 /
>vi /etc/shadow
>flush
>quitvirsh snapshot-create-as --domain vm-d8 --name vm-d8-snap --description "jessie base"
virsh snapshot-list vm-d8
virsh snapshot-revert webserver vm-d8-snap
virsh snapshot-delete --domain vm-d8 --snapshotname vm-d8-snapvirsh shutdown <vm name>
virsh setmaxmem <vm name> 16G --config
virsh setmem <vm name> 16G --configvirsh edit <vm name>
<vcpu placement='stait virsh vcpuinfoc'>6</vcpu>
virsh vcpuinfo <vm name>virsh edit <vm name>
<vcpu placement='stait virsh vcpuinfoc'>6</vcpu>
virsh vcpuinfo <vm name># show current info of vm disk
virsh domblklist <vm name> --details
qemu-img resize /var/lib/libvirt/images/VM-Name +4G
fdisk -l /var/lib/libvirt/images/VM-Name# on the VM
roo@vm:/ fdisk -l /dev/vda
Command (m for help): p
Device Boot Start End Sectors Size Id Type
/dev/vda1 * 2048 33554432 33552385 16G 83 Linux
Command (m for help): d
[1,2.5]: 1
# swap auch löschen und danach mit p wieder erstellen, nachdem primary ext partition erstellt wurde(start und end sector per default übernehmen)
Command (m for help): d
[1,2.5]: 2
Command (m for help): n
[primary ,extend]: p
partition number: 1
# WICHTIG: start sector von oben entnehmen !!
Command (m for help): t
# ext4
type: 83
Command (m for help): n
[primary ,extend]: p
partition number: 2
# start und endsector per default übernehmen
Command (m for help): w
roo@vm:/ resize2fs /dev/sda1
roo@vm:/ reboot
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