Centos7 Kvm v2v迁移(都是在vm环境下,实验后面没有实现)
1、v2v迁移
#虚拟化迁移至虚拟化环境
#p2v迁移，是指物理机器迁移至虚拟化环境
#安装v2v迁移工具：yum install -y virt-v2v
#
2、KVM-KVM的v2v迁移
#KVM是采用Centos7，vm是采用oel6操作系统，始终报错
错误信息：
qemu-img: /var/tmp/v2vovl16ebce.qcow2: Could not open '/data/vmfs/c4_qcow2.img': No such file irectory
virt-v2v: error: qemu-img command failed, see earlier errors
If reporting bugs, run virt-v2v with debugging enabled and include the
#新安装centos6操作系统测试，环境确认，两台KVM需要有相同的存储池位置，vmfspool
#node72检查
[root@node72 ~]# virsh pool-list
名称 状态 自动开始
-------------------------------------------
iso 活动 是
oel1 活动 是
vmfspool 活动 是
[root@node72 ~]#
#关闭需要迁移的虚拟机
[root@node72 ~]# virsh list --all
Id 名称 状态
----------------------------------------------------
7 oel4 running
- oel5 关闭
[root@node72 ~]# virsh shutdown oel4
域 oel4 被关闭
[root@node72 ~]#
#测试KVM 自身vm迁移到自身，-oc是迁移出去，-on取另外一个名字，因为系统本身已经存在oel4这个实例
[root@node72 ~]# virt-v2v -oc qemu+ssh://192.168.2.110/system -os vmfspool -on centos4 -b br0 oel4
[ 0.0] Opening the source -i libvirt oel4
[ 0.0] Creating an overlay to protect the source from being modified
[ 0.0] Opening the overlay
[ 10.0] Initializing the target -o libvirt -oc qemu+ssh://192.168.2.110/system -os vmfspool
root@192.168.2.110's password:
root@192.168.2.110's password:
root@192.168.2.110's password:
[ 17.0] Inspecting the overlay
[ 24.0] Checking for sufficient free disk space in the guest
[ 24.0] Estimating space required on target for each disk
[ 24.0] Converting CentOS release 6.5 (Final) to run on KVM
virt-v2v: This guest has virtio drivers installed.
[ 69.0] Mapping filesystem data to avoid copying unused and blank areas
[ 69.0] Closing the overlay
[ 70.0] Checking if the guest needs BIOS or UEFI to boot
[ 70.0] Copying disk 1/1 to /data/vmfs/centos4-sda (qcow2)
(100.00/100%)
[ 82.0] Creating output metadata
root@192.168.2.110's password:
池 vmfspool 被刷新
root@192.168.2.110's password:
定义域 centos4（从 /tmp/v2vlibvirt7142b4.xml）
[ 107.0] Finishing off
[root@node72 ~]#
#可以看到迁移的vm磁盘为/data/vmfs/centos4-sda (qcow2)
#检查，另外需要因为是迁移到自身测试，所以需要查看配置文件UUID,MAC地址，VNC端口，
[root@node72 ~]# virsh list --all
Id 名称 状态
----------------------------------------------------
- centos4 关闭
- oel4 关闭
- oel5 关闭
[root@node72 ~]#
3、KVM之间的v2v迁移
#检查node71的迁移环境
[root@node71 ~]# virsh pool-list
名称 状态 自动开始
-------------------------------------------
iso 活动 是
vmfspool 活动 是
[root@node71 ~]#
#测试迁移，从node72迁移出来
[root@node72 ~]# virt-v2v -oc qemu+ssh://192.168.2.111/system -os vmfspool -b br0 oel4
[ 0.0] Opening the source -i libvirt oel4
[ 0.0] Creating an overlay to protect the source from being modified
[ 0.0] Opening the overlay
[ 10.0] Initializing the target -o libvirt -oc qemu+ssh://192.168.2.111/system -os vmfspool
root@192.168.2.111's password:
root@192.168.2.111's password:
root@192.168.2.111's password:
[ 18.0] Inspecting the overlay
[ 24.0] Checking for sufficient free disk space in the guest
[ 24.0] Estimating space required on target for each disk
[ 24.0] Converting CentOS release 6.5 (Final) to run on KVM
virt-v2v: This guest has virtio drivers installed.
[ 68.0] Mapping filesystem data to avoid copying unused and blank areas
[ 69.0] Closing the overlay
[ 69.0] Checking if the guest needs BIOS or UEFI to boot
[ 69.0] Copying disk 1/1 to /data/vmfs/oel4-sda (qcow2)
(100.00/100%)
[ 80.0] Creating output metadata
root@192.168.2.111's password:
池 vmfspool 被刷新
root@192.168.2.111's password:
定义域 oel4（从 /tmp/v2vlibvirt255acc.xml）
[ 86.0] Finishing off
[root@node72 ~]#
#迁移完成
#检查测试，在运行迁移的vm之前，需要根据实际环境的情况来检查vm配置文件，确定是否按需修改
[root@node71 vmfs]# virsh list --all
Id 名称 状态
----------------------------------------------------
- oel2 关闭
- oel3 关闭
- oel4 关闭
[root@node71 vmfs]#
#可以查看到oel4已经迁移完成
#这是采用node72迁移出去的方式(-oc),但是在node71上采用迁移进来的方式(-ic)就会报错误
[root@node71 vmfs]# virt-v2v -ic qemu+ssh://192.168.2.110/system -os vmfspool -b br0 -on centos6 oel4
virt-v2v: warning: no support for remote libvirt connections to '-ic
qemu+ssh://192.168.2.110/system'. The conversion may fail when it tries to
read the source disks.
[ 0.0] Opening the source -i libvirt -ic qemu+ssh://192.168.2.110/system oel4
root@192.168.2.110's password:
[ 2.0] Creating an overlay to protect the source from being modified
qemu-img: /var/tmp/v2vovl1c0ab2.qcow2: Could not open '/data/vmfs/c4_qcow2.img': No such file or directory
virt-v2v: error: qemu-img command failed, see earlier errors
If reporting bugs, run virt-v2v with debugging enabled and include the
complete output:
virt-v2v -v -x [...]
[root@node71 vmfs]#
#暂时还不清楚，我们-ic一直会报"No such file or directory"
virt-v2v 命令帮助
[root@node71 iso]# virt-v2v --help
virt-v2v: convert a guest to use KVM
virt-v2v -ic vpx://vcenter.example.com/Datacenter/esxi -os imported esx_guest
virt-v2v -ic vpx://vcenter.example.com/Datacenter/esxi esx_guest -o rhev -os rhev.nfs:/export_domain --network rhevm
virt-v2v -i libvirtxml guest-domain.xml -o local -os /var/tmp
virt-v2v -i disk disk.img -o local -os /var/tmp
virt-v2v -i disk disk.img -o glance
There is a companion front-end called "virt-p2v" which comes as an
ISO or CD image that can be booted on physical machines.
A short summary of the options is given below. For detailed help please
read the man page virt-v2v(1).
-b in:out Map bridge 'in' to 'out'
--bridge in:out -"-
--debug-gc Debug GC and memory allocations
--dcpath path Override dcPath (for vCenter)
--dcPath path -"-
--debug-overlay Save overlay files
--debug-overlays -"-
-i disk|libvirt|libvirtxml|ova Set input mode (default: libvirt)
-ic uri Libvirt URI
-if format Input format (for -i disk)
--long-options List long options
--machine-readable Make output machine readable
-n in:out Map network 'in' to 'out'
--network in:out -"-
--no-copy Just write the metadata
--no-trim all|mp,mp,.. Don't trim selected mounts
-o glance|libvirt|local|null|qemu|rhev|vdsm Set output mode (default: libvirt)
-oa sparse|preallocated Set output allocation mode
-oc uri Libvirt URI
-of raw|qcow2 Set output format
-on name Rename guest when converting
-os storage Set output storage location
--password-file file Use password from file
--print-source Print source and stop
--qemu-boot This option cannot be used in RHEL
-q Quiet output
--quiet -"-
--root ask|... How to choose root filesystem
--vdsm-image-uuid uuid Output image UUID(s)
--vdsm-vol-uuid uuid Output vol UUID(s)
--vdsm-vm-uuid uuid Output VM UUID
--vdsm-ovf-output Output OVF file
-v Enable debugging messages
--verbose -"-
-V Display version and exit
--version -"-
--vmtype server|desktop Set vmtype (for RHEV)
-x Enable tracing of libguestfs calls
-help Display this list of options
--help Display this list of options
