怎么做qq分享网站,wordpress页脚修改,简约风ppt模板免费,ps怎么做网站首页kvm存储虚拟化 一、命令行工具管理虚拟磁盘1、查看虚拟磁盘2、添加磁盘3、删除磁盘 二、qcow2格式的磁盘文件1、创建磁盘文件2、差量镜像/快速创建虚机2.1 创建差量镜像2.2 准备配置文件2.3 创建虚拟机2.4 批量部署虚拟机 三、存储池 storage pool1、类型2、在线迁移2.1 规划后… kvm存储虚拟化 一、命令行工具管理虚拟磁盘1、查看虚拟磁盘2、添加磁盘3、删除磁盘 二、qcow2格式的磁盘文件1、创建磁盘文件2、差量镜像/快速创建虚机2.1 创建差量镜像2.2 准备配置文件2.3 创建虚拟机2.4 批量部署虚拟机 三、存储池 storage pool1、类型2、在线迁移2.1 规划后端存储2.2 运行虚拟机的主机挂载测试存储3、创建存储池4、添加主机名解析5、测试迁移 一、命令行工具管理虚拟磁盘
1、查看虚拟磁盘
[rootmartin-host ~]# virsh domblklist vm01_centos79
Target Source
------------------------------------------------
hda /var/lib/libvirt/images/vm01_centos79.qcow2
hdb /kvm/iso/CentOS-7.9-x86_64-Everything-2009.iso
vda /var/lib/libvirt/images/vm01_centos79-1.qcow22、添加磁盘
[rootmartin-host ~]# qemu-img create -f qcow2 /var/lib/libvirt/images/vm01_centos79-2.qcow2 5G
Formatting /var/lib/libvirt/images/vm01_centos79-2.qcow2, fmtqcow2 size5368709120 encryptionoff cluster_size65536 lazy_refcountsoff [rootmartin-host ~]# ls /var/lib/libvirt/images/
vm01_centos79-1.qcow2 vm01_centos79-2.qcow2 vm01_centos79.qcow2 vm02_centos79.qcow2[rootmartin-host ~]# virsh attach-disk vm01_centos79 --source /var/lib/libvirt/images/vm01_centos79-2.qcow2 --target vdb --subdriver qcow2 --cache writeback --persistent
Disk attached successfully磁盘缓存的工作模式:
1、writeback 回写
2、writethrough 通写默认[rootmartin-host ~]# virsh domblklist vm01_centos79
Target Source
------------------------------------------------
hda /var/lib/libvirt/images/vm01_centos79.qcow2
hdb /kvm/iso/CentOS-7.9-x86_64-Everything-2009.iso
vda /var/lib/libvirt/images/vm01_centos79-1.qcow2
vdb /var/lib/libvirt/images/vm01_centos79-2.qcow23、删除磁盘
[rootmartin-host ~]# virsh detach-disk vm01_centos79 vda --persistent
Disk detached successfully[rootmartin-host ~]# virsh detach-disk vm01_centos79 vdb --persistent
Disk detached successfully二、qcow2格式的磁盘文件
1、创建磁盘文件
[rootmartin-host ~]# qemu-img create -f qcow2 /opt/disk01.qcow2 8G
Formatting /opt/disk01.qcow2, fmtqcow2 size8589934592 encryptionoff cluster_size65536 lazy_refcountsoff [rootmartin-host ~]# qemu-img info /opt/disk01.qcow2
image: /opt/disk01.qcow2
file format: qcow2
virtual size: 8.0G (8589934592 bytes)
disk size: 196K
cluster_size: 65536
Format specific information:compat: 1.1lazy refcounts: false
2、差量镜像/快速创建虚机
2.1 创建差量镜像
[rootmartin-host ~]# qemu-img create -f qcow2 -b /var/lib/libvirt/images/vm01_centos79.qcow2 /var/lib/libvirt/images/test1_centos79.qcow2
Formatting /var/lib/libvirt/images/test1_centos79.qcow2, fmtqcow2 size8589934592 backing_file/var/lib/libvirt/images/vm01_centos79.qcow2 encryptionoff cluster_size65536 lazy_refcountsoff [rootmartin-host ~]# qemu-img info /var/lib/libvirt/images/test1_centos79.qcow2
image: /var/lib/libvirt/images/test1_centos79.qcow2
file format: qcow2
virtual size: 8.0G (8589934592 bytes)
disk size: 196K
cluster_size: 65536
backing file: /var/lib/libvirt/images/vm01_centos79.qcow2
Format specific information:compat: 1.1lazy refcounts: false
2.2 准备配置文件
[rootmartin-host qemu]# cp vm01_centos79.xml test1_centos79.xml
虚拟名称、UUID、磁盘文件位置、MAC地址、VNC2.3 创建虚拟机
[rootmartin-host ~]# virsh define /etc/libvirt/qemu/test1_centos79.xml
Domain test1_centos79 defined from /etc/libvirt/qemu/test1_centos79.xml[rootmartin-host ~]# virsh list --allId Name State
----------------------------------------------------- test1_centos79 shut off- vm01_centos79 shut off- vm02 shut off[rootmartin-host ~]# virsh start test1_centos79
Domain test1_centos79 started[rootmartin-host ~]# virsh autostart test1_centos79
Domain test1_centos79 marked as autostarted2.4 批量部署虚拟机
#!/bin/bash
## 删除所有虚拟机for vm_name in $(virsh list --all | awk NR2{print $2})
dovirsh destroy ${vm_name} /dev/nullvirsh undefine ${vm_name} /dev/null
donerm -rf /var/lib/libvirt/images/*# 新建虚拟机
kvm_config_file/opt/kvm/vm_base.xml
kvm_disk_file/opt/kvm/vm_base.qcow2read -p 虚拟机数量: numberfor i in $(seq $number)
dovm_namevm${i}_centos79cp ${kvm_config_file} /etc/libvirt/qemu/${vm_name}.xmlqemu-img create -f qcow2 -b ${kvm_disk_file} /var/lib/libvirt/images/${vm_name}.qcow2 /dev/nullsed -ri s/vm_base/${vm_name}/g /etc/libvirt/qemu/${vm_name}.xmlsed -ri /uuid/c \ uuid$(uuidgen)/uuid /etc/libvirt/qemu/${vm_name}.xmlvm_mac52:54:00:$(openssl rand -hex 10 | sed -r s/(..)(..)(..).*/\1:\2:\3/)sed -ri /mac/c \ mac address${vm_mac}/ /etc/libvirt/qemu/${vm_name}.xmlvirsh define /etc/libvirt/qemu/${vm_name}.xml /dev/nulldone三、存储池 storage pool
存储磁盘文件的路径/位置
1、类型
本地存储池 网络存储池 虚拟机在线迁移(必须)
[rootmartin-host ~]# virsh pool-list --all Name State Autostart
-------------------------------------------default active yes iso active yes [rootmartin-host ~]# virsh pool-dumpxml default
pool typedirnamedefault/nameuuid1328db51-967c-4696-a63c-88814221c3ad/uuidcapacity unitbytes211654430720/capacityallocation unitbytes20023582720/allocationavailable unitbytes191630848000/availablesource/sourcetargetpath/var/lib/libvirt/images/pathpermissionsmode0711/modeowner0/ownergroup0/grouplabelsystem_u:object_r:virt_image_t:s0/label/permissions/target
/pool2、在线迁移
2.1 规划后端存储
[rootkvm_nfs ~]# cat /etc/exports
/kvm_image 192.168.140.200(rw,no_root_squash) 192.168.140.10(rw,no_root_squash)2.2 运行虚拟机的主机挂载测试存储
[rootmartin-host ~]# mount 192.168.140.11:/kvm_image /mnt/
[rootmartin-host ~]# touch /mnt/a
[rootmartin-host ~]# ls /mnt/
a
[rootmartin-host ~]# umount /mnt 3、创建存储池 [rootmartin-host ~]# df -hT | grep nfs
192.168.140.11:/kvm_image nfs4 100G 33M 100G 1% /pool_by_nfs
[rootmartin-host ~]# 4、添加主机名解析
[rootmartin-host ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6192.168.140.200 martin-host.linux.com
192.168.140.10 new-host.linux.com[rootmartin-host ~]# scp /etc/hosts root192.168.140.10:/etc/hosts
root192.168.140.10s password:
hosts 5、测试迁移
[rootmartin-host ~]# virsh migrate vm1_centos79 --live qemussh://192.168.140.10/system --unsafe
root192.168.140.10s password:
