Pjack: KVM Installation

https://help.ubuntu.com/11.10/serverguide/C/virtualization.html
http://bojack.pixnet.net/blog/post/29040863-%E3%80%90linux%E3%80%91%E5%9C%A8-ubuntu-11.04-%E4%B8%8A%E5%AE%89%E8%A3%9D-kvm

wistor@wistor-003:~$ kvm-ok
INFO: /dev/kvm exists
KVM acceleration can be used

wistor@wistor-003:~$ lsmod | grep kvm
kvm_intel             137721  3
kvm                   407077  1 kvm_intel

wistor@wistor-003:~$ sudo modprobe -l | grep kvm
kernel/arch/x86/kvm/kvm.ko
kernel/arch/x86/kvm/kvm-intel.ko
kernel/arch/x86/kvm/kvm-amd.ko

wistor@wistor-003:~$ sudo apt-get install kvm libvirt-bin

wistor@wistor-003:~$ cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto br0
iface br0 inet static
        bridge_ports eth0
        bridge_fd 9
        bridge_hello 2
        bridge_maxage 12
        bridge_stp off
        address 172.16.123.83
        network 172.16.0.0
        netmask 255.255.0.0
        gateway 172.16.1.254

auto br0:1
iface br0:1 inet static
    address 192.168.123.83
    netmask 255.255.255.0

wistor@wistor-003:~$ ifconfig
br0       Link encap:Ethernet  HWaddr 00:26:2d:0a:36:7e
          inet addr:172.16.123.83  Bcast:0.0.0.0  Mask:255.255.0.0
          inet6 addr: fe80::226:2dff:fe0a:367e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:186911 errors:0 dropped:5837 overruns:0 frame:0
          TX packets:79278 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:136435680 (136.4 MB)  TX bytes:8542559 (8.5 MB)

br0:1     Link encap:Ethernet  HWaddr 00:26:2d:0a:36:7e
          inet addr:192.168.123.83  Bcast:0.0.0.0  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0      Link encap:Ethernet  HWaddr 00:26:2d:0a:36:7e
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:278356 errors:0 dropped:10 overruns:0 frame:0
          TX packets:91634 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:176265990 (176.2 MB)  TX bytes:9623004 (9.6 MB)
          Memory:fbea0000-fbec0000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:98 errors:0 dropped:0 overruns:0 frame:0
          TX packets:98 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:9439 (9.4 KB)  TX bytes:9439 (9.4 KB)

virbr0    Link encap:Ethernet  HWaddr 52:6b:4e:82:ba:f8
          inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)



wistor@wistor-003:~$ groups
wistor adm dialout cdrom plugdev lpadmin sambashare admin libvirtd

wistor@wistor-003:~$ virsh -c qemu:///system list
 Id Name                 State
----------------------------------

wistor@wistor-003:~$ sudo iptables -t nat -L -n
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination

Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination
MASQUERADE  tcp  --  192.168.122.0/24    !192.168.122.0/24    masq ports: 1024-65535
MASQUERADE  udp  --  192.168.122.0/24    !192.168.122.0/24    masq ports: 1024-65535
MASQUERADE  all  --  192.168.122.0/24    !192.168.122.0/24

wistor@wistor-003:~$ sudo apt-get install virtinst
wistor@wistor-003:~$ cat build_vm.sh
HOSTNAME=vm3
MEMORY=512
CPUS=1
DISK_SIZE=10000
IP=172.16.123.84


sudo virt-install \
-v \
-n $HOSTNAME \
-r $MEMORY \
--disk path=$HOSTNAME.img,bus=virtio,size=4 \
-c ubuntu-11.10-server-amd64.iso \
--accelerate \
--network bridge=br0 \
--connect=qemu:///system \
--virt-type=kvm \
--graphics vnc,listen=0.0.0.0
wistor@wistor-003:~$ sudo ./build_vm.sh
wistor@wistor-003:~$ virsh vncdisplay vm3
:0

2012/03/14 補: 用一個 image 當作 base, 然後 create 出來其他 image 檔
http://jamyy.dyndns.org/blog/2012/02/3594.html

wistor@wistor-001:~$ sudo qemu-img create -b iscsi-server-base.qcow2 -f qcow2 wistor-004.qcow2
Formatting 'wistor-004.qcow2', fmt=qcow2 size=4294967296 backing_file='iscsi-server-base.qcow2' encryption=off cluster_size=0

2012/03/14 補: 把.img 轉成 qcow2

wistor@wistor-001:~$ sudo qemu-img convert -O qcow2 iscsi-server-base.img iscsi-server-base.qcow2

2012/03/15 補: 如何直接 mount qcow2

wistor@wistor-003:~$ modprobe nbd
wistor@wistor-003:~$ sudo kvm-nbd -c /dev/nbd0 ~/kvm/ubuntu-11.10-3.2-base.qcow2
wistor@wistor-003:~$ sudo mount /dev/nbd0p1 /mnt/kvm
wistor@wistor-003:~$ sudo umount /mnt/kvm
wistor@wistor-003:~$ sudo kvm-nbd -d /dev/nbd0

2012/03/16 補: 如何 boot from network

# 記得要先安裝這個套件
wistor@ubuntu:~/kvm$ sudo apt-get install kvm-pxe
[sudo] password for wistor:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  kvm-pxe
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 128 kB of archives.
After this operation, 201 kB of additional disk space will be used.
Get:1 http://us.archive.ubuntu.com/ubuntu/ oneiric/universe kvm-pxe all 5.4.4-7ubuntu3 [128 kB]
Fetched 128 kB in 2s (58.7 kB/s)
Selecting previously deselected package kvm-pxe.
(Reading database ... 71450 files and directories currently installed.)
Unpacking kvm-pxe (from .../kvm-pxe_5.4.4-7ubuntu3_all.deb) ...
Setting up kvm-pxe (5.4.4-7ubuntu3) ...

# 在  內加上 network 選項, 如果需要 bootmenu 就再加上設定
wistor@ubuntu:~/kvm$ sudo cat /etc/libvirt/qemu/ubuntu-11.10-3.2-base.xml | grep -A 10 os
  
    hvm