Changes between Initial Version and Version 1 of Tutorials/i0Net/KVM

Timestamp:

Jun 1, 2012, 4:18:35 PM (12 years ago)

Author:

seskar

Comment:

—

Tutorials/i0Net/KVM

@@ +1 @@
+[[TOC(heading=KVM tutorial TOC, Tutorials/KVM)]]
+
+= KVM Tutorial =
+== Installing KVM ==
+
+Check if your CPU supports hardware virtualization via command:
+{{{
+egrep '(vmx|svm)' --color=always /proc/cpuinfo
+}}}
+        
+If nothing is displayed CPU doesn't support virtualization.
+
+Instal packages ubuntu-virt-server, python-vm-builder and kvm-pxe via command (but just in case, first update the package repository on the node):
+{{{
+apt-get update
+apt-get install ubuntu-virt-server python-vm-builder kvm-pxe
+}}}
+                
+Add the current user to the group:
+{{{
+adduser `id -un` libvirtd
+adduser `id -un` kvm
+}}}
+        
+Logout and login again:
+{{{
+logout
+ssh root@node1-1
+}}}
+        
+Check users group by comamand:
+{{{
+groups
+}}}
+
+Output should be similar to:
+{{{
+root kvm libvirtd
+}}}
+
+To list all running KVMs use:
+{{{
+virsh -c qemu:///system list
+}}}
+
+== Setup network bridge on the host ==
+
+Install the package bridge-utils:
+{{{
+apt-get install bridge-utils
+}}}
+
+Create the bridge interface named br0:
+{{{
+brctl addbr br0
+}}}
+
+Edit the network interfaces configuration with editor (for example nano):
+{{{
+nano /etc/network/interfaces
+}}}
+
+and add persistent configuration for br0 interface:
+{{{
+# This file describes the network interfaces available on your system
+# and how to activate them. For more information, see interfaces(5).
+
+# The loopback network interface
+auto lo
+iface lo inet loopback
+
+# The primary network interface
+auto eth1
+iface eth1 inet dhcp
+
+# The secondary network interface
+auto eth0
+iface eth0 inet manual
+
+#Bridge 0 interface
+auto br0
+iface br0 inet static
+  address 10.28.1.1
+  netmask 255.255.0.0
+  broadcast 10.28.255.255
+  network 10.28.0.0
+  bridge_ports eth0
+  bridge_fd 9
+  bridge_hello 2
+  bridge_maxage 12
+  bridge_stp off
+}}}
+
+Restart networking with command:
+{{{
+/etc/init.d/networking restart
+}}}
+
+For bridge verification open the new ssh window and run:
+{{{
+tcpdump -i br0
+}}}
+
+and then, in the other window, try to ping some adress in same subnet, for example:
+{{{
+ping 10.28.0.1
+}}}
+
+In the second windows you should see logging ofrequest/reply messages.
+
+It is recommended to reboot the machine once the bridge is configured.
+
+== Create and run KVM image using vmbuilder ==
+
+Folder /var/lib/libvirt/images/ will be created for storing images. Each image will have
+separate folder for example /var/lib/libvirt/images/virtual-machine1
+
+Create necessary folders:
+{{{
+mkdir -p /var/lib/libvirt/images/vm1/mytemplates/libvirt
+}}}     
+'-p' option of mkdir command means that all parent folders will be created if they do not exist.
+
+vmbuilder tool uses templates for creating of images so copy the template:
+{{{
+cp /etc/vmbuilder/libvirt/* /var/lib/libvirt/images/vm1/mytemplates/libvirt/
+}}}
+        
+Open partition configuration file with command:
+{{{
+nano /var/lib/libvirt/images/vm1/vmbuilder.partition
+}}}
+
+and add the following lines:
+{{{
+root 8000
+swap 4000
+---
+/var 20000
+}}}
+        
+Copied text defines three partitions - root, swap and var and their sizes.
+"---" means that var partition will be separate image file.
+
+Go to folder vm1:
+{{{
+cd /var/lib/libvirt/images/vm1/
+}}}
+
+Execute vmbuilder command:
+{{{
+vmbuilder kvm ubuntu --suite=oneiric --flavour=virtual --arch=amd64 --mirror=http://de.archive.ubuntu.com/ubuntu -o --libvirt=qemu:///system --ip=10.28.4.4 --gw=10.28.0.1 --mask=255.255.0.0 --bcast=10.28.255.255 --net=10.28.0.0 --dns=10.0.0.9 --part=vmbuilder.partition --templates=mytemplates --user=guest --name=Guest --pass=guest --addpkg=vim-nox --addpkg=unattended-upgrades --addpkg=acpid --mem=256 --hostname=vm1 --bridge=br0 --addpkg openssh-server --addpkg nano
+}}}     
+
+== Create and run KVM image using KVM directly ==
+
+Download ubuntu server ISO file:
+{{{
+wget -O ubuntu-server.iso http://www.ubuntu.com/start-download?distro=server&bits=64&release=latest 
+}}}
+
+Create Disk:
+{{{
+qemu-img create -f qcow2 vm-oneric-amd64-serial 10G
+}}}
+
+Setup network bridge (see part III).
+
+Install tool for Tun:
+{{{
+apt-get install uml-utilities
+}}}
+
+Create the tap interface:
+{{{
+tunctl
+}}}
+
+Output of the name is (tap0).
+
+Add tap interface to the bridge as a port:
+{{{
+brctl addif br0 tap0
+}}}
+
+Bring up tap0 interface:
+{{{
+ifconfig tap0 up
+}}}
+
+Boot and Install Ubuntu using VNC:
+{{{
+kvm -daemonize -m 1024 -hda vm-oneric-amd64-serial -cdrom ubuntu-server.iso -boot d -smp 2 -cpu qemu64 -net nic,model=virtio -net tap,ifname=tap0,script=no -vnc :0
+}}}     
+
+To run already created image you can enter:
+{{{
+kvm -daemonize -m 1024 -hda vm-oneric-amd64-serial  -smp 2 -cpu qemu64 -net nic,model=virtio -net tap,ifname=tap0,script=no -vnc :0
+}}}
+
+Use VNC client to connect to virtual machine.
+        
+Kill Virtual machine (KVM process):
+{{{
+pkill -9 kvm
+}}}
+
+Remove tap0 in as a bridge interface:
+{{{
+brctl delif br0 tap0
+}}}
+
+Delete tap interface:
+{{{
+tunctl -d tap0
+}}}
+
+{{{
+kvm -daemonize -m 1024 -hda vm-oneric-amd64-serial -smp 2 -cpu qemu64 -net nic,model=virtio -net tap,ifname=tap0,script=no -vnc :0
+}}}
+
+{{{
+kvm -daemonize -m 1024 -hda vm-oneric-amd64-serial -cdrom ubuntu-11.10-server-amd64.iso -boot d -smp 2 -cpu qemu64 -net nic,model=virtio -net tap,ifname=tap0,script=no -vnc :0
+}}}
+