前情
需要就是普普通通的给kvm下的一台虚拟机加1000G的磁盘
计划一
1.查看指标 vm4的磁盘 状况
2. 在kvm主机上创立一个新的虚构磁盘
root@szo-192:/opt/kvm/image# qemu-img create -f qcow2 -o size=1000G /opt/kvm/image/kvm-vm4-02-1T.qcow2Formatting '/opt/kvm/image/kvm-vm4-02-1T.qcow2', fmt=qcow2 size=1073741824000 cluster_size=65536 lazy_refcounts=off refcount_bits=16
3. 从kvm主机挂载盘到vm4上
root@szo-192:/opt/kvm/image# lskvm-vm1_1.qcow2 kvm-vm2.qcow2 kvm-vm4-02-1T.qcow2 kvm-vm5.qcow2 kvm-vm7.qcow2kvm-vm1.qcow2 kvm-vm3.qcow2 kvm-vm4.qcow2 kvm-vm6.qcow2 kvm-vm8.qcow2root@szo-192:/opt/kvm/image# virsh attach-disk --domain kvm-vm4 --source /opt/kvm/image/kvm-vm4-02-1T.qcow2 --target vdb --targetbus virtio --driver qemu --subdriver qcow2 --sourcetype file --cache none --persistentDisk attached successfully
4.验证
kvm 主机端： virsh domblklist kvm-vm4
在vm4
扩容 /home 分区
[root@vm4 ~]# fdisk -lDisk /dev/vda: 536.9 GB, 536870912000 bytes, 1048576000 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk label type: dosDisk identifier: 0x000a6a14 Device Boot Start End Blocks Id System/dev/vda1 * 2048 2099199 1048576 83 Linux/dev/vda2 2099200 18616319 8258560 82 Linux swap / Solaris/dev/vda3 18616320 123473919 52428800 83 Linux/dev/vda4 123473920 1048575999 462551040 5 Extended/dev/vda5 123475968 1048575999 462550016 83 LinuxDisk /dev/vdb: 1073.7 GB, 1073741824000 bytes, 2097152000 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytes[root@vm4 ~]# [root@vm4 ~]# [root@vm4 ~]# [root@vm4 ~]# fdisk /dev/vdb Welcome to fdisk (util-linux 2.23.2).Changes will remain in memory only, until you decide to write them.Be careful before using the write command.Device does not contain a recognized partition tableBuilding a new DOS disklabel with disk identifier 0xff552d5a.Command (m for help): nPartition type: p primary (0 primary, 0 extended, 4 free) e extendedSelect (default p): pPartition number (1-4, default 1): First sector (2048-2097151999, default 2048): Using default value 2048Last sector, +sectors or +size{K,M,G} (2048-2097151999, default 2097151999): Using default value 2097151999Partition 1 of type Linux and of size 1000 GiB is setCommand (m for help): pDisk /dev/vdb: 1073.7 GB, 1073741824000 bytes, 2097152000 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk label type: dosDisk identifier: 0xff552d5a Device Boot Start End Blocks Id System/dev/vdb1 2048 2097151999 1048574976 83 LinuxCommand (m for help): wThe partition table has been altered!Calling ioctl() to re-read partition table.Syncing disks.[root@vm4 ~]# partprobe[root@vm4 ~]# fdisk -lDisk /dev/vda: 536.9 GB, 536870912000 bytes, 1048576000 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk label type: dosDisk identifier: 0x000a6a14 Device Boot Start End Blocks Id System/dev/vda1 * 2048 2099199 1048576 83 Linux/dev/vda2 2099200 18616319 8258560 82 Linux swap / Solaris/dev/vda3 18616320 123473919 52428800 83 Linux/dev/vda4 123473920 1048575999 462551040 5 Extended/dev/vda5 123475968 1048575999 462550016 83 LinuxDisk /dev/vdb: 1073.7 GB, 1073741824000 bytes, 2097152000 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk label type: dosDisk identifier: 0xff552d5a Device Boot Start End Blocks Id System/dev/vdb1 2048 2097151999 1048574976 83 Linux[root@vm4 ~]# [root@vm4 ~]# [root@vm4 ~]# [root@vm4 ~]# pvcreate /dev/vdb1 Physical volume "/dev/vdb1" successfully created.[root@vm4 ~]# vgdisplay selabel_open failed: No such file or directory[root@vm4 ~]# pvdisplay "/dev/vdb1" is a new physical volume of "<1000.00 GiB" --- NEW Physical volume --- PV Name /dev/vdb1 VG Name PV Size <1000.00 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID CNDRjs-534c-FK5w-EcCY-WAr1-EKsk-RMyWQw [root@vm4 ~]# vgcreate -s 64M centos /dev/vdb1 Volume group "centos" successfully created[root@vm4 ~]# pvdisplay --- Physical volume --- PV Name /dev/vdb1 VG Name centos PV Size <1000.00 GiB / not usable 63.00 MiB Allocatable yes PE Size 64.00 MiB Total PE 15999 Free PE 15999 Allocated PE 0 PV UUID CNDRjs-534c-FK5w-EcCY-WAr1-EKsk-RMyWQw [root@vm4 ~]# vgs VG #PV #LV #SN Attr VSize VFree centos 1 0 0 wz--n- <999.94g <999.94g[root@vm4 ~]# vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 1 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size <999.94 GiB PE Size 64.00 MiB Total PE 15999 Alloc PE / Size 0 / 0 Free PE / Size 15999 / <999.94 GiB VG UUID cPr09p-NEI9-AqzI-dplr-236J-cY4q-89WajD[root@vm4 ~]# pvdisplay --- Physical volume --- PV Name /dev/vdb1 VG Name centos PV Size <1000.00 GiB / not usable 63.00 MiB Allocatable yes PE Size 64.00 MiB Total PE 15999 Free PE 15999 Allocated PE 0 PV UUID CNDRjs-534c-FK5w-EcCY-WAr1-EKsk-RMyWQw[root@vm4 ~]# mkdir /data[root@vm4 ~]# lvcreate -L 999G -n data centos Logical volume "data" created.[root@vm4 ~]# echo $?0[root@vm4 ~]# lvdisplay --- Logical volume --- LV Path /dev/centos/data LV Name data VG Name centos LV UUID pFjVfe-WyxD-Wldo-zkyr-JDhY-mt2a-JK0W61 LV Write Access read/write LV Creation host, time vm4, 2023-06-19 17:31:11 +0800 LV Status available # open 0 LV Size 999.00 GiB Current LE 15984 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 252:0[root@vm4 ~]# mkfs.xfs /dev/centos/datameta-data=/dev/centos/data isize=512 agcount=4, agsize=65470464 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0, sparse=0data = bsize=4096 blocks=261881856, imaxpct=25 = sunit=0 swidth=0 blksnaming =version 2 bsize=4096 ascii-ci=0 ftype=1log =internal log bsize=4096 blocks=127872, version=2 = sectsz=512 sunit=0 blks, lazy-count=1realtime =none extsz=4096 blocks=0, rtextents=0[root@vm4 ~]# echo $?0[root@vm4 ~]# vim /etc/fstab[root@vm4 ~]# cat /etc/fstab## /etc/fstab# Created by anaconda on Tue Jun 13 05:25:45 2023## Accessible filesystems, by reference, are maintained under '/dev/disk'# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info#UUID=76f19609-5d15-47ec-8334-1070e09a71a6 / xfs defaults 0 0UUID=5b531ad0-8ba7-443c-b873-cfedd11caaa3 /boot xfs defaults 0 0UUID=3ed24818-0c16-4e69-9cf9-de77429a868f /home xfs defaults 0 0#UUID=16616dc6-ef8f-4cc2-be9a-45897bd963fa swap swap defaults 0 0/dev/centos/data /data xfs defaults 0 0 [root@vm4 ~]# mount -a[root@vm4 ~]# df -hFilesystem Size Used Avail Use% Mounted ondevtmpfs 7.8G 0 7.8G 0% /devtmpfs 7.8G 0 7.8G 0% /dev/shmtmpfs 7.8G 102M 7.7G 2% /runtmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup/dev/vda3 50G 3.5G 47G 7% //dev/vda5 441G 1.9G 440G 1% /home/dev/vda1 1014M 170M 845M 17% /boot/dev/mapper/centos-data 999G 33M 999G 1% /data
计划二
#第一：创立一块磁盘 qemu-img create -f raw /kvm-hosts/kvm-web011.raw 10G#第二：编辑xml文件，在本来磁盘信息的上面，增加如下内容 virsh edit kvm-web01<disk type='file' device='disk'> <driver name='qemu' type='raw'></driver> <source file='/kvm-hosts/kvm-web011.raw'></source> <target dev='vdb' bus='virtio'></target> </disk> #留神点：vdb，virtio，type，file#第三：启动虚拟机，并查看配置 virsh start kvm-web01 ps -ef |grep kvm#第四：进入虚拟机，格式化，挂载应用