When upgraded from CentOS6.6 to CentOS7, the libvirtd will encounter following error:
Simply remove:
# virsh edit nodename
- <feature policy='require' name='invtsc'/>
First create the qemu based vm:
$ pwd
/media/arch/home/juju/img/migration
$ qemu-img create -f qcow2 ubuntu1504.qcow2 100G
$ sudo qemu-system-x86_64 -enable-kvm -m 512 -smp 4 -name ubuntu1504 -monitor stdio -boot c -drive file=/media/arch/home/juju/img/migration/ubuntu1504.qcow2,if=none,id=drive-virtio-disk0,boot=on -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 -drive file=/media/arch/home/dash/iso/ubuntu-15.04-server-amd64.iso,if=none,media=cdrom,id=drive-ide0-1-0 -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -device virtio-net-pci,vlan=0,id=net0,mac=52:54:00:13:08:96 -net tap -vnc 127.0.0.1:3
After Installation, startup the vm via(didn’t attach the file):
$ sudo qemu-system-x86_64 -enable-kvm -m 512 -smp 4 -name ubuntu1504 -monitor stdio -boot c -drive file=/media/arch/home/juju/img/migration/ubuntu1504.qcow2,if=none,id=drive-virtio-disk0,boot=on -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 -drive if=none,media=cdrom,id=drive-ide0-1-0 -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -device virtio-net-pci,vlan=0,id=net0,mac=52:54:00:13:08:96 -net tap -vnc 127.0.0.1:3
Use top -d 1 for every second refreshed.
The same environment is set as the src machine.
$ qemu-img create -f qcow2 dest.img 20G
$ qemu-system-x86_64 -enable-kvm -m 512 -smp 4 -name ubuntu1504 -monitor stdio -boot c -drive file=/root/Code/dest.img,if=none,id=drive-virtio-disk0,boot=on -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 -drive if=none,media=cdrom,id=drive-ide0-1-0 -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -device virtio-net-pci,vlan=0,id=net0,mac=52:54:00:13:08:96 -net tap -vnc 127.0.0.1:8
(qemu) info status
VM status: paused (inmigrate)
Start migration in the src side via:
(qemu) migrate -d -b tcp:192.168.1.18:8888
(qemu) info migrate
In destination machine, you can see the status of the migration.
After migration, the machine stays its top output to the terminal.
libvirt via virt-manager virtual network start failed.
Change:
--- libvirt-1.2.16.orig/src/util/virfirewall.c 2015-05-23 08:56:12.000000000 -0400
+++ libvirt-1.2.16.new/src/util/virfirewall.c 2015-06-18 10:01:51.954157612 -0400
@@ -932,14 +932,14 @@
virMutexLock(&ruleLock);
- if (currentBackend == VIR_FIREWALL_BACKEND_AUTOMATIC) {
+// if (currentBackend == VIR_FIREWALL_BACKEND_AUTOMATIC) {
/* a specific backend should have been set when the firewall
* object was created. If not, it means none was found.
*/
- virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
- _("Failed to initialize a valid firewall backend"));
- goto cleanup;
- }
+// virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+// _("Failed to initialize a valid firewall backend"));
+// goto cleanup;
+// }
if (!firewall || firewall->err == ENOMEM) {
virReportOOMError();
goto cleanup;
For building the libvirt, do following:
# pacman -S abs base-devel
# abs
# cp /var/abs/community/libvirt ~/Code/
# sudo pacman -S lxc libiscsi open-iscsi perl-xml-xpath
# cd ~/Code/libvirt
# makepkg
After makepkg, change the code as in above, tar it again, makepkg with following command makepkg --skipchecksums, this time it will generate a new tar.xz file. Install it via:
# pacman -U libvirt-1.2.17-1-x86_64.pkg.tar.xz
Solve it via:
# pacman -S ebtables vde2
# reboot
Start again and this time is OK.
[root@Arch network]# pwd
/etc/systemd/network
[root@Arch network]# cat MyBridge.netdev
[NetDev]
Name=br0
MACAddress=52:54:00:91:e8:11
Kind=bridge
[root@Arch network]# cat MyBridge.network
[Match]
Name=br0
[Network]
DNS=180.76.76.76,114.114.114.114
[Address]
Address=192.168.1.18/24
[Route]
Gateway=192.168.1.1
[root@Arch network]# cat MyEth.network
[Match]
Name=eth0
[Network]
Bridge=br0
Now enable and start the systemd’s networkd service via:
# systemctl enable systemd-networkd.service
# reboot
By this you could enable systemd on ArchLinux.
Simply resolved this issue via:
# pacman -S firewalld
# systemctl enable firewalld
# systemctl start firewalld
# pacman -Syu ebtables dnsmasq
Install Procedure ignored, because it’s simple.
Following steps are used for adding iscsi partition.
Manually setup the volumn and now you could add your volumn into the FreeNAS System.
Configure iscsi:
Add the name of iqn.onecloud.iscsi, next we add portal:
Add Authorized Access Now:
Add Initator:
Create target:
Add extent:
LUM RPMs could also be spcified:
Associate Targets:
Enable the iscsi service:
Better you change the IP Address into static IP address.
On a installed Ubuntu, I choose Ubuntu14.04, do following for connecting the exising created iscsi partition:
$ sudo apt-get install -y open-iscsi gdisk
[root:~]# iscsiadm -m discovery -t sendtargets -p 10.47.58.40
10.47.58.40:3260,-1 iqn.onecloud.iscsi:iscsidisk1
Login and listed the device :
[root:~]# iscsiadm -m node -T 'iqn.onecloud.iscsi:iscsidisk1' -p 10.47.58.40 -l
Logging in to [iface: default, target: iqn.onecloud.iscsi:iscsidisk1, portal: 10.47.58.40,3260] (multiple)
Login to [iface: default, target: iqn.onecloud.iscsi:iscsidisk1, portal: 10.47.58.40,3260] successful.
[root:~]# ls -l /dev/disk/by-path
total 0
lrwxrwxrwx 1 root root 9 Jul 17 05:39 ip-10.47.58.40:3260-iscsi-iqn.onecloud.iscsi:iscsidisk1-lun-0 -> ../../sda
Use gdisk for partition the /dev/sda, and creating the filesystem on them:
# gdisk -l /dev/sda
Number Start (sector) End (sector) Size Code Name
1 2048 8191 3.0 MiB EF02 BIOS boot partition
2 8192 1056767 512.0 MiB 8200 Linux swap
3 1056768 40959966 19.0 GiB 8300 Linux filesystem
# mkfs.ext4 /dev/sda3
# mkswap /dev/sda2
Now install system, first mount usable systems:
# mkdir /mnt/chroot
# mount /dev/sda3 /mnt/chroot
# debootstrap wheezy /mnt/chroot
# debootstrap jessie /mnt/chroot http://mirrors.aliyun.com/debian/
chroot into the newly install jessie:
root@Ubuntu-14:~# mount -t proc none /mnt/chroot/proc
root@Ubuntu-14:~# mount -t sysfs none /mnt/chroot/sys
root@Ubuntu-14:~# mount --bind /dev /mnt/chroot/dev
root@Ubuntu-14:~# chroot /mnt/chroot /bin/bash
Disk configuration:
root@Ubuntu-14:/# cp /proc/mounts /etc/mtab
root@Ubuntu-14:/# sed -i '\|^/dev/sda3|,$!d' /etc/mtab
root@Ubuntu-14:/# blkid /dev/sda2 /dev/sda3
/dev/sda2: UUID="0c570265-543a-41ec-9edb-65bc55d677cd" TYPE="swap" PARTLABEL="Linux swap" PARTUUID="bfb7c1b1-c6cd-4302-9cb4-d6c1de43a0ad"
/dev/sda3: UUID="c1c5f995-e3f7-48c7-b5d5-4963a77d9b7b" TYPE="ext4" PARTLABEL="Linux filesystem" PARTUUID="00ccaf63-b3b3-46c4-92ab-1933d31cbcb7"
root@Ubuntu-14:/# echo 'UUID=c1c5f995-e3f7-48c7-b5d5-4963a77d9b7b / ext4 errors=remount-ro 0 1' >> /etc/fstab
root@Ubuntu-14:/# echo 'UUID=0c570265-543a-41ec-9edb-65bc55d677cd none swap sw 0 0' >> /etc/fstab
root@Ubuntu-14:/# cat /etc/fstab
# UNCONFIGURED FSTAB FOR BASE SYSTEM
UUID=c1c5f995-e3f7-48c7-b5d5-4963a77d9b7b / ext4 errors=remount-ro 0 1
UUID=0c570265-543a-41ec-9edb-65bc55d677cd none swap sw 0 0
Install some packages, be sure to make grub2 installed to /dev/sda:
# apt-get install vim less openssh-server locales
# apt-get install linux-image-amd64 grub2 initramfs-tools
Configure the Grub:
# apt-get install open-iscsi
# vim /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT=""
GRUB_CMDLINE_LINUX=""ISCSI_INITIATOR=iqn.onecloud.iscsi.client:client ISCSI_TARGET_NAME=iqn.onecloud.iscsi:iscsidisk1 ISCSI_TARGET_IP=10.47.58.40 ISCSI_TARGET_PORT=3260 root=UUID=c1c5f995-e3f7-48c7-b5d5-4963a77d9b7b ip=10.47.58.176::10.47.58.1:255.255.255.0:client:eth0:off""
# touch /etc/iscsi/iscsi.initramfs
# echo "InitiatorName=iqn.onecloud.iscsi.client:client" > /etc/iscsi/initiatorname.iscsi
# update-grub
# update-initramfs -u
# passwd
Configure the network interfaces:
root@Ubuntu-14:/etc/network# cat interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc/network/interfaces.d:
#source-directory /etc/network/interfaces.d
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet static
#iface eth0 inet manual
address 10.47.58.176
netmask 255.255.255.0
gateway 10.47.58.1
dns-nameservers 114.114.114.114
Now exit and umount all of the mounted partitions.
# exit
# umount /mnt/chroot/{dev,proc,sys,}
root@Ubuntu-14:~# iscsiadm -m node -T 'iqn.onecloud.iscsi:iscsidisk1' -p 10.47.58.40 -u
# echo "InitiatorName=iqn.onecloud.iscsi.client:client" > /etc/iscsi/initiatorname.iscsi
#!ipxe
set initiator-iqn iqn.2007-08.com.example.client:client
sanboot iscsi:san.example.com:6:3260:0:iqn.2007-08.com.example.san:rootp
Following modification need to be done:
On Deployed node:
$ sudo vim /etc/hosts
10.47.58.157 node157
There will be iptables issue. for you have to install following packages:
# yum install -y install iptables-utils iptables-services
# reboot
Now begin to install again, and it will be ok.
Add the client, and make sure the “COPY CPU configuration” is selected in the menu.
Or, your system vm won’t startup.
Why at home my output becomes:
[root@node157 network-scripts]# cat ifcfg-cloudbr0
DEVICE=cloudbr0
ONBOOT=yes
HWADDR=52:54:00:73:86:D2
TYPE=Bridge
BOOTPROTO=dhcp
NM_CONTROLLED=no
[root@node157 network-scripts]# cat ifcfg-eth0
DEVICE=eth0
ONBOOT=yes
HWADDR=52:54:00:73:86:D2
TYPE=Ethernet
BOOTPROTO=dhcp
NM_CONTROLLED=no
BRIDGE=cloudbr0
Sometimes you want to deploy system with cobbler server, in some restricted network which dhcp service is not allowed(considering broadcasting storm, security, etc.) Following are the steps of how-to:
Change Cobbler server setting:
$ sudo vim /etc/cobbler/settings
manage_dhcp: 0
$ sudo cobbler sync
$ sudo service dhcpd stop
Add the node definition in cobbler(useless):
# cobbler system add --name=node2 --profile=CentOS6.5-x86_64 --mac=52:54:00:71:59:64 --interface=eth0 --static=1 --ip-address=10.47.58.3 --dns-name=node2 --gateway=10.47.58.1
Now bootup your newly added computer with PXE, hit ctrl+B once you see the bios hint.
iPXE> config net0
hit ctrl+B should be like in following image:
Setting like following:
Hit Ctrl+x for saving the settings and continue to set:
iPXE> imgfetch -n img tftp://10.47.58.2/pxelinux.0
iPXE> imgload img
iPXE> boot
Now begin to install, you will met nework configuration fail issue:
Hit Cancel, manually set up the network, first select installation method:
Configure TCP/IP:
Configure IP address/gateway/dns/netmask:
Now configure the installation setting, you could find it in your own ks configuration file:
Continue to install, they are the same as you did before.
Since the dhcp server is available in the network, simply press ctrl+B to enter the pxe boot menu and set the next_server to 10.47.58.2, then:
iPXE> imgfetch -n img tftp://10.47.58.2/pxelinux.0
iPXE> imgload img
iPXE> boot
Now select whichever you want to deploy, your configuration will be deployed ASAP.
You have to change following items:
$ sudo vim /etc/cobbler/settings
next_server: 172.16.10.2
server: 172.16.10.2
$ sudo vim /etc/cobbler/dhcp.templates
subnet 172.16.10.0 netmask 255.255.255.0 {
option routers 172.16.10.1;
range dynamic-bootp 172.16.10.3 172.16.10.254;
option domain-name-servers 114.114.114.114, 180.76.76.76;
option subnet-mask 255.255.255.0;
filename "/pxelinux.0";
default-lease-time 21600;
max-lease-time 43200;
next-server $next_server;
class "pxeclients" {
//..................
$ sudo vim /etc/default/isc-dhcp-server
INTERFACES="eth0"
Notice the IP address should be in the same ip address range.
After modification, simply use cobbler sync for syncing your changes, now restart the cobbler server, your operation should be the same as the above situations.
Also if you have playbooks of ansible which uses the static IP address, you also have to replace the IP related settings.