网站文章更新要求,中介订制网站开发,网站建设与管理试卷答案,freedns免费域名申请2019独角兽企业重金招聘Python工程师标准 准备磁盘分区 fdisk /dev/sdb n 创建三个新分区#xff0c;分别1G t 改变分区类型为8e 准备物理卷 pvcreate /dev/sdb1 pvcreate /dev/sdb2 pvcreate /dev/sdb3 pvdisplay/pvs 列出当前的物理卷 pvremove /dev/sdb3 删除… 2019独角兽企业重金招聘Python工程师标准 准备磁盘分区 fdisk /dev/sdb n 创建三个新分区分别1G t 改变分区类型为8e 准备物理卷 pvcreate /dev/sdb1 pvcreate /dev/sdb2 pvcreate /dev/sdb3 pvdisplay/pvs 列出当前的物理卷 pvremove /dev/sdb3 删除物理卷 准备卷组 vgcreate vg1 /dev/sdb1 /dev/sdb2 /dev/sdb3 vgdisplay /vgs列出卷组 vgremove vg1 删除物理卷 创建逻辑卷 lvcreate -L 200M -n lv1 vg1 lvdisplay 列出逻辑卷 格式化mkfs.xfs /dev/vg1/lv1再挂载 lvremove /dev/vg1/lv1 删除逻辑卷 扩容逻辑卷 lvresize -L 300M /dev/vg1/lv1 重新设置卷大小 e2fsck -f /dev/vg1/lv1 检查磁盘错误 (ext4执行) resize2fs /dev/vg1/lv1 更新逻辑卷信息(ext4执行) xfs_growfs /dev/vg1/lv1 xfs文件系统需要执行 缩减逻辑卷xfs不支持 先umount e2fsck -f /dev/vg1/lv1 检查磁盘错误ext resize2fs /dev/vg1/lv1 100M 更新逻辑卷信息ext lvresize -L 100M /dev/vg1/lv1 重新设置卷大小 扩展卷组 fdisk /dev/sdb 新增/dev/sdb5(逻辑分区8e) 2G pvcreate /dev/sdb5 vgextend vg1 /dev/sdb5 lvresize -L 100M /dev/vg1/lv1 重新设置卷大小 Lvm 1.创建物理分区 2.物理分区设置成物理卷 3.物理卷设置成卷组 4.卷组划分成逻辑卷 5.然后再格式化挂载 先创建3个分区在分区的时候按创建分区按t设置分区类型8e 为lvm [rootlinux-128 ~]# fdisk /dev/sdb 命令(输入 m 获取帮助)n Partition type:p primary (0 primary, 0 extended, 4 free)e extended Select (default p): p 分区号 (1-4默认 1) 起始 扇区 (2048-41943039默认为 2048) 将使用默认值 2048 Last 扇区, 扇区 or size{K,M,G} (2048-41943039默认为 41943039)1G 分区 1 已设置为 Linux 类型大小设为 1 GiB命令(输入 m 获取帮助)t 已选择分区 1 Hex 代码(输入 L 列出所有代码)8e 已将分区“Linux”的类型更改为“Linux LVM”命令(输入 m 获取帮助)p磁盘 /dev/sdb21.5 GB, 21474836480 字节41943040 个扇区 Units 扇区 of 1 * 512 512 bytes 扇区大小(逻辑/物理)512 字节 / 512 字节 I/O 大小(最小/最佳)512 字节 / 512 字节 磁盘标签类型dos 磁盘标识符0xbc339889设备 Boot Start End Blocks Id System /dev/sdb1 2048 2099199 1048576 8e Linux LVM /dev/sdb2 2099200 4196351 1048576 8e Linux LVM /dev/sdb3 4196352 6293503 1048576 8e Linux LVM1.创建物理卷 需要安装命令pvcreate 小知识如果只知道命令不知道这个命令是那个包安装的可以使用命令yum provides /*/[命令] 来查找命令是那个包安装的。 [rootlinux-128 ~]# yum provides /*/pvcreate 已加载插件fastestmirror base | 3.6 kB 00:00:00 extras | 3.4 kB 00:00:00 updates | 3.4 kB 00:00:00 (1/2): extras/7/x86_64/primary_db | 129 kB 00:00:00 (2/2): updates/7/x86_64/primary_db | 3.6 MB 00:00:02 Loading mirror speeds from cached hostfile* base: mirrors.aliyun.com* extras: mirrors.aliyun.com* updates: mirrors.cn99.com extras/7/x86_64/filelists_db | 486 kB 00:00:00 updates/7/x86_64/filelists_db | 2.1 MB 00:00:01 1:bash-completion-2.1-6.el7.noarch : Programmable completion for Bash 源 base 匹配来源 文件名 /usr/share/bash-completion/completions/pvcreate 7:lvm2-2.02.171-8.el7.x86_64 : Userland logical volume management tools 源 base 匹配来源 文件名 /usr/sbin/pvcreatelvm2-2.02.171-8.el7.x86_64 这个就是包名。 [rootlinux-128 ~]# yum install -y lvm2安装完使用命令pvcreate 创建物理卷[rootlinux-128 ~]# pvcreate /dev/sdb1 WARNING: ext4 signature detected on /dev/sdb1 at offset 1080. Wipe it? [y/n]: yWiping ext4 signature on /dev/sdb1.Physical volume /dev/sdb1 successfully created. [rootlinux-128 ~]# pvcreate /dev/sdb2Physical volume /dev/sdb2 successfully created. [rootlinux-128 ~]# pvcreate /dev/sdb3Physical volume /dev/sdb3 successfully created.物理卷创建完后使用命令pvdisplay或者pvs来查看信息[rootlinux-128 ~]# pvdisplay/dev/sdb2 is a new physical volume of 1.00 GiB--- NEW Physical volume ---PV Name /dev/sdb2VG NamePV Size 1.00 GiBAllocatable NOPE Size 0Total PE 0Free PE 0Allocated PE 0PV UUID GqWi3Q-4XT9-1RyO-JE3C-Zber-oPw5-4zGyyp/dev/sdb1 is a new physical volume of 1.00 GiB--- NEW Physical volume ---PV Name /dev/sdb1VG NamePV Size 1.00 GiBAllocatable NOPE Size 0Total PE 0Free PE 0Allocated PE 0PV UUID zxaUnf-kxNt-Udki-sYSk-B3so-8hi1-qTM9gB/dev/sdb3 is a new physical volume of 1.00 GiB--- NEW Physical volume ---PV Name /dev/sdb3VG NamePV Size 1.00 GiBAllocatable NOPE Size 0Total PE 0Free PE 0Allocated PE 0PV UUID 6TgcyT-DY1j-9PHt-upJH-nZql-V20D-Ttbm1w[rootlinux-128 ~]# pvsPV VG Fmt Attr PSize PFree/dev/sdb1 lvm2 --- 1.00g 1.00g/dev/sdb2 lvm2 --- 1.00g 1.00g/dev/sdb3 lvm2 --- 1.00g 1.00gpvremove /dev/sdb3 删除物理卷2.创建卷组 命令vgcreate来创建卷组可以1或者多个物理卷来创建1个卷组格式vgcreate [卷组名] dev/sdb1 多个物理卷用空格隔开rootlinux-128 ~]# vgcreate vg1 /dev/sdb1 dev/sdb2Device dev/sdb2 not found (or ignored by filtering).用命令vgdisplay 或者vgs来查看信息[rootlinux-128 ~]# vgdisplay--- Volume group ---VG Name vg1System IDFormat lvm2Metadata Areas 2Metadata Sequence No 1VG Access read/writeVG Status resizableMAX LV 0Cur LV 0Open LV 0Max PV 0Cur PV 2Act PV 2VG Size 1.99 GiBPE Size 4.00 MiBTotal PE 510Alloc PE / Size 0 / 0Free PE / Size 510 / 1.99 GiBVG UUID FbIw1F-dYh6-LL3L-Ah8O-NSTQ-v5gN-G2Lpsy[rootlinux-128 ~]# vgsVG #PV #LV #SN Attr VSize VFreevg1 2 0 0 wz--n- 1.99g 1.99gvgremove vg1 删除物理卷3.创建逻辑卷 命令lvcreate[rootlinux-128 ~]# lvcreate -L 100M -n lv1 vg1Logical volume lv1 created.命令lvdisplay或者lvs来查看信息[rootlinux-128 ~]# lvdisplay--- Logical volume ---LV Path /dev/vg1/lv1LV Name lv1VG Name vg1LV UUID TOmOhK-Hf1Y-aKkQ-nfP4-9tu3-cmUD-lbGjMzLV Write Access read/writeLV Creation host, time linux-128, 2017-11-06 22:54:39 0800LV Status available# open 0LV Size 100.00 MiBCurrent LE 25Segments 1Allocation inheritRead ahead sectors auto- currently set to 8192Block device 253:0 [rootlinux-128 ~]# lvsLV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convertlv1 vg1 -wi-a----- 100.00m4.格式化成ext4 [rootlinux-128 ~]# mkfs.ext4 /dev/vg1/lv1 mke2fs 1.42.9 (28-Dec-2013) 文件系统标签 OS type: Linux 块大小1024 (log0) 分块大小1024 (log0) Stride0 blocks, Stripe width0 blocks 25688 inodes, 102400 blocks 5120 blocks (5.00%) reserved for the super user 第一个数据块1 Maximum filesystem blocks33685504 13 block groups 8192 blocks per group, 8192 fragments per group 1976 inodes per group Superblock backups stored on blocks:8193, 24577, 40961, 57345, 73729Allocating group tables: 完成 正在写入inode表: 完成 Creating journal (4096 blocks): 完成 Writing superblocks and filesystem accounting information: 完成5.挂载mount rootlinux-128 ~]# mount /dev/vg1/lv1 /mnt [rootlinux-128 ~]# df -h 文件系统 容量 已用 可用 已用% 挂载点 /dev/sda3 16G 1.3G 15G 8% / devtmpfs 907M 0 907M 0% /dev tmpfs 916M 0 916M 0% /dev/shm tmpfs 916M 8.6M 908M 1% /run tmpfs 916M 0 916M 0% /sys/fs/cgroup /dev/sda1 197M 109M 88M 56% /boot tmpfs 184M 0 184M 0% /run/user/0 /dev/mapper/vg1-lv1 93M 1.6M 85M 2% /mnt[rootlinux-128 ~]# mkdir /mnt/1122 [rootlinux-128 ~]# touch /mnt/23.txt [rootlinux-128 ~]# echo 112233 23.txt [rootlinux-128 ~]# cat 23.txt 112233扩容逻辑卷 Etx4系统类型扩容前要先卸载挂载点[rootlinux-128 ~]# umount /mnt命令lvresize -L 来扩容重新设置卷大小[rootlinux-128 ~]# lvresize -L 200M /dev/vg1/lv1Size of logical volume vg1/lv1 changed from 100.00 MiB (25 extents) to 200.00 MiB (50 extents).Logical volume vg1/lv1 successfully resized.e2fsck -f /dev/vg1/lv1 检查磁盘错误 (ext4执行)[rootlinux-128 ~]# e2fsck -f /dev/vg1/lv1 e2fsck 1.42.9 (28-Dec-2013) 第一步: 检查inode,块,和大小 第二步: 检查目录结构 第3步: 检查目录连接性 Pass 4: Checking reference counts 第5步: 检查簇概要信息 /dev/vg1/lv1: 13/25688 files (7.7% non-contiguous), 8897/102400 blocksresize2fs /dev/vg1/lv1 更新逻辑卷信息(ext4执行)[rootlinux-128 ~]# resize2fs /dev/vg1/lv1 resize2fs 1.42.9 (28-Dec-2013) Resizing the filesystem on /dev/vg1/lv1 to 204800 (1k) blocks. The filesystem on /dev/vg1/lv1 is now 204800 blocks long.挂载[rootlinux-128 ~]# mount /dev/vg1/lv1 /mnt [rootlinux-128 ~]# ls /mnt 1122 23.txt lostfound [rootlinux-128 ~]# cat 23.txt 112233扩容之前创建的文件还存在说明扩容不影响之前的文件。 缩减逻辑卷 先卸载挂载点[rootlinux-128 ~]# umount /mnte2fsck -f /dev/vg1/lv1 检查磁盘错误ext[rootlinux-128 ~]# e2fsck -f /dev/vg1/lv1 e2fsck 1.42.9 (28-Dec-2013) 第一步: 检查inode,块,和大小 第二步: 检查目录结构 第3步: 检查目录连接性 Pass 4: Checking reference counts 第5步: 检查簇概要信息 /dev/vg1/lv1: 13/49400 files (7.7% non-contiguous), 11885/204800 blocksresize2fs /dev/vg1/lv1 100M 更新逻辑卷信息ext[rootlinux-128 ~]# resize2fs /dev/vg1/lv1 100M resize2fs 1.42.9 (28-Dec-2013) Resizing the filesystem on /dev/vg1/lv1 to 102400 (1k) blocks. The filesystem on /dev/vg1/lv1 is now 102400 blocks long.lvresize -L 100M /dev/vg1/lv1 重新设置卷大小[rootlinux-128 ~]# lvresize -L 100M /dev/vg1/lv1WARNING: Reducing active logical volume to 100.00 MiB.THIS MAY DESTROY YOUR DATA (filesystem etc.) Do you really want to reduce vg1/lv1? [y/n]: ySize of logical volume vg1/lv1 changed from 200.00 MiB (50 extents) to 100.00 MiB (25 extents).Logical volume vg1/lv1 successfully resized.查看信息 [rootlinux-128 ~]# lvsLV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convertlv1 vg1 -wi-a----- 100.00m挂载[rootlinux-128 ~]# mount /dev/vg1/lv1 /mnt [rootlinux-128 ~]# cat /mnt/23.txt [rootlinux-128 ~]# cat 23.txt 112233并不会因缩容导致文件丢失 Xfs类型来扩容 先卸载挂载点[rootlinux-128 ~]# umount /mnt设置文件类型[rootlinux-128 ~]# mkfs.xfs -f /dev/vg1/lv1 meta-data/dev/vg1/lv1 isize512 agcount4, agsize6400 blks sectsz512 attr2, projid32bit1 crc1 finobt0, sparse0 data bsize4096 blocks25600, imaxpct25 sunit0 swidth0 blks naming version 2 bsize4096 ascii-ci0 ftype1 log internal log bsize4096 blocks855, version2 sectsz512 sunit0 blks, lazy-count1 realtime none extsz4096 blocks0, rtextents0[rootlinux-128 ~]# lvsLV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convertlv1 vg1 -wi-ao---- 100.00m[rootlinux-128 ~]# mount /dev/vg1/lv1 /mnt [rootlinux-128 ~]# ls /mnt [rootlinux-128 ~]# mkdir /mnt/123 [rootlinux-128 ~]# touch /mnt/12.txt [rootlinux-128 ~]# echo 123123 /mnt/12.txt [rootlinux-128 ~]# cat /mnt/12.txt 123123lvresize -L 300M /dev/vg1/lv1扩容300M[rootlinux-128 ~]# lvresize -L 300M /dev/vg1/lv1Size of logical volume vg1/lv1 changed from 100.00 MiB (25 extents) to 300.00 MiB (75 extents).Logical volume vg1/lv1 successfully resized.[rootlinux-128 ~]# lvsLV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convertlv1 vg1 -wi-ao---- 300.00m4.xfs_growfs /dev/vg1/lv1 xfs文件系统需要执行 [rootlinux-128 ~]# xfs_growfs /dev/vg1/lv1 meta-data/dev/mapper/vg1-lv1 isize512 agcount4, agsize6400 blks sectsz512 attr2, projid32bit1 crc1 finobt0 spinodes0 data bsize4096 blocks25600, imaxpct25 sunit0 swidth0 blks naming version 2 bsize4096 ascii-ci0 ftype1 log internal bsize4096 blocks855, version2 sectsz512 sunit0 blks, lazy-count1 realtime none extsz4096 blocks0, rtextents0 data blocks changed from 25600 to 76800[rootlinux-128 ~]# df -h 文件系统 容量 已用 可用 已用% 挂载点 /dev/sda3 16G 1.3G 15G 8% / devtmpfs 907M 0 907M 0% /dev tmpfs 916M 0 916M 0% /dev/shm tmpfs 916M 8.6M 908M 1% /run tmpfs 916M 0 916M 0% /sys/fs/cgroup /dev/sda1 197M 109M 88M 56% /boot tmpfs 184M 0 184M 0% /run/user/0 /dev/mapper/vg1-lv1 297M 5.5M 292M 2% /mnt [rootlinux-128 ~]# cat /mnt/12.txt 123123卷组扩容 逻辑卷最大扩容到卷组的大小当逻辑卷扩容到卷组大小的时候就要想办法给卷组扩容之前用/dev/sdb1和/dev/sdb2组成的卷组vg1我们现在见/dev/sdb3加进来[rootlinux-128 ~]# vgextend vg1 /dev/sdb3Volume group vg1 successfully extended[rootlinux-128 ~]# vgsVG #PV #LV #SN Attr VSize VFreevg1 3 1 0 wz--n- 2.99g 2.70glvresize -L 100M /dev/vg1/lv1 重新设置卷大小[rootlinux-128 ~]# lvresize -L 500M /dev/vg1/lv1Size of logical volume vg1/lv1 changed from 300.00 MiB (75 extents) to 500.00 MiB (125 extents).Logical volume vg1/lv1 successfully resized.[rootlinux-128 ~]# lvsLV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convertlv1 vg1 -wi-ao---- 500.00m磁盘故障 多半是因为磁盘挂载出现问题 输入root账号vi /etc/fstab 删除最下面一行保存退出 3 重启服务器 转载于:https://my.oschina.net/u/3866516/blog/1832398