KVM Memo
check status of gest OS
$ virsh list --all
Id Name State
----------------------------------------------------
1 client1 running
2 web1 running
3 l3dsrweb running
9 opstack1 running
14 web3 running
17 web2 running
- client2 shut off
- client3 shut off
- CVP2017101 shut off
- rdo01 shut off
- Spine-1 shut off
- test shut off
- test3 shut off
Install guest (CentOS 7)
$ qemu-img create -f qcow2 /var/lib/libvirt/images/centos7.qcow2 8G
$ virt-install \
--name centos7_CICD \
--virt-type=kvm \
--ram 1024 \
--vcpus 1 \
--os-type=linux \
--os-variant rhel7 \
--boot hd \
--network bridge=br0 \
--disk path=/var/lib/libvirt/images/centos7.qcow2,size=8,format=qcow2 \
--location='/var/lib/libvirt/iso/CentOS-7-x86_64-DVD-1804.iso' \
--graphics none \
--serial pty \
--console pty \
--extra-args "console=tty0 console=ttyS0,115200n8"
Run guest OS
$ virsh start <guest name>
Stop geust
$ virsh shutdown <guest name>
remove guest
$ virsh destroy <guest name>
$ virsh undefine <guest name>
Access and Log in guest
$ virsh console <guest name>
Check a NIC Networm Manager
$ nmcli dev
DEVICE TYPE STATE
eth0 802-3-ethernet unmanaged
eth1 802-3-ethernet unmanaged
eth2 802-3-ethernet disconnected
eth3 802-3-ethernet unmanaged
eth4 802-3-ethernet unmanaged
eth5 802-3-ethernet connected
$ nmcli con
NAME UUID TYPE SCOPE TIMESTAMP-REAL
System eth5 c1a137dd-45d5-466a-ac18-76f5299c2eeb 802-3-ethernet system Wed 22 Aug 2018 02:39:50 AM JST
System eth2 c1a137dd-45d5-466a-ac18-76f5299c2eeb 802-3-ethernet system never
NAME UUID TYPE SCOPE TIMESTAMP-REAL
# virsh net-list --all
Name State Autostart Persistent
--------------------------------------------------
default active yes yes
Check virtual bridge
$ brctl show
bridge name bridge id STP enabled interfaces
br-client 8000.f4ce46a6da64 no eth0
vnet0
br-l3dsrweb 8000.f4ce46a6da67 no eth3
vnet4
br-ras 8000.000000000000 no
br-ras2 8000.000000000000 no
br-web 8000.f4ce46a6da65 no eth1
vnet2
vnet7
br-web2 8000.f4ce46a6da66 no eth2
vnet9
br0 8000.441ea1d31fdc no eth4
vnet1
vnet10
vnet3
vnet5
vnet6
vnet8
br1 8000.000000000000 no
virbr0 8000.525400d01630 yes virbr0-nic
Create Virtual Bridge Network
$ brctl addbr br-container
$ brctl show
bridge name bridge id STP enabled interfaces
br-container 8000.000000000000 no
Connect Phisycal NIC to Virtual Bridge
$ brctl addif <br name> <eth name>
$ brctl show
purge and delete Virtual Bridge
$ brctl delif <br name> <eth name>
$ brctl delbr <br name>
$ brctl show
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