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2015年(45)

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分类: LINUX

2015-05-11 22:42:31

我在REHL7.0下安装oracle12c的时候提示根目录/下空间不足,于是想直接扩下根目录,网上搜索都是通过

[root@redhat6-3 ~]# resize2fs /dev/mapper/vg_redhat63-lv_root

resize2fs 1.41.12 (17-May-2010)

Filesystem at /dev/mapper/vg_redhat63-lv_root is mounted on /; on-line resizing required

old desc_blocks = 2, new_desc_blocks = 2

Performing an on-line resize of /dev/mapper/vg_redhat63-lv_root to 4859904 (4k) blocks.

The filesystem on /dev/mapper/vg_redhat63-lv_root is now 4859904 blocks long.

 

resize2fs来做,(具体案例很多,大家一搜就有)可以在线挂硬盘,但是扩根目录文件夹的时候一直提示如下: [root@rac2 ~]# resize2fs /dev/hel/ resize2fs 1.42.9 (28-Dec-2013) resize2fs: Bad magic number in super-block while trying to open /dev/rhel/root Couldn't find valid filesystem superblock. [root@rac2 ~]# 重启也好,啥法都是试了就是一直提示,有的说umout目录,但是根目录不可能umout的,ext2online也试不行。 第三天查网帖的时候找到一篇《CentOS6、7 LVM逻辑卷分区自动扩容Shell脚本》,本来看到resize2fs感觉没啥新意,突然发现xfs_growfs ,赶紧仔细研读,(由于CentOS6和CentOS7在默认根文件系统的文件系统格式存在差异,需要判断是否为xfs,如果是xfs则应该使用xfs_growfs而不是一味的使用resize2fs。) 一句话惊醒梦中人啊,查阅了几篇xfs的用法后,在系统下一试果然好使, [root@rac2 ~]# xfs_info /dev/rhel/root meta-data=/dev/mapper/rhel-root  isize=256    agcount=4, agsize=1147392 blks          =                       sectsz=512   attr=2, projid32bit=1          =                       crc=0 data     =                       bsize=4096   blocks=4589568, imaxpct=25          =                       sunit=0      swidth=0 blks naming   =version 2              bsize=4096   ascii-ci=0 ftype=0 log      =internal               bsize=4096   blocks=2560, version=2          =                       sectsz=512   sunit=0 blks, lazy-count=1 realtime =none                   extsz=4096   blocks=0, rtextents=0 [root@rac2 ~]# df -h Filesystem             Size  Used Avail Use% Mounted on /dev/mapper/rhel-root   18G  3.0G   15G  17% / devtmpfs               905M     0  905M   0% /dev tmpfs                  914M  164K  914M   1% /dev/shm tmpfs                  914M  9.0M  905M   1% /run tmpfs                  914M     0  914M   0% /sys/fs/cgroup /dev/sda1              497M  120M  377M  25% /boot /dev/sr0               3.5G  3.5G     0 100% /run/media/root/RHEL-7.0 Server.x86_64 [root@rac2 ~]# xfs_growfs /dev/rhel/root meta-data=/dev/mapper/rhel-root  isize=256    agcount=4, agsize=1147392 blks          =                       sectsz=512   attr=2, projid32bit=1          =                       crc=0 data     =                       bsize=4096   blocks=4589568, imaxpct=25          =                       sunit=0      swidth=0 blks naming   =version 2              bsize=4096   ascii-ci=0 ftype=0 log      =internal               bsize=4096   blocks=2560, version=2          =                       sectsz=512   sunit=0 blks, lazy-count=1 realtime =none                   extsz=4096   blocks=0, rtextents=0 data blocks changed from 4589568 to 9046016 [root@rac2 ~]# xfs_growfs /dev/rhel/root xfs_info /dev/rhel/root meta-data=/dev/mapper/rhel-root  isize=256    agcount=8, agsize=1147392 blks          =                       sectsz=512   attr=2, projid32bit=1          =                       crc=0 data     =                       bsize=4096   blocks=9046016, imaxpct=25          =                       sunit=0      swidth=0 blks naming   =version 2              bsize=4096   ascii-ci=0 ftype=0 log      =internal               bsize=4096   blocks=2560, version=2          =                       sectsz=512   sunit=0 blks, lazy-count=1 realtime =none                   extsz=4096   blocks=0, rtextents=0 [root@rac2 ~]# df -h Filesystem             Size  Used Avail Use% Mounted on /dev/mapper/rhel-root   35G  3.0G   32G   9% / devtmpfs               905M     0  905M   0% /dev tmpfs                  914M  164K  914M   1% /dev/shm tmpfs                  914M  9.0M  905M   1% /run tmpfs                  914M     0  914M   0% /sys/fs/cgroup /dev/sda1              497M  120M  377M  25% /boot /dev/sr0               3.5G  3.5G     0 100% /run/media/root/RHEL-7.0 Server.x86_64 [root@rac2 ~]# 困扰了三天的问题终于解决了,晚上可以好梦了。赶紧分享大家以飨。 以下贴出扩展swap和根目录的过程,欢迎大家交流 初始状态 [root@rac1 ~]# free -m              total       used       free     shared    buffers     cached Mem:          1826        919        907          9          0        324 -/+ buffers/cache:        594       1232 Swap:         2047          0       2047 [root@rac1 ~]# df -h Filesystem             Size  Used Avail Use% Mounted on /dev/mapper/rhel-root   18G  5.0G   13G  29% / devtmpfs               908M     0  908M   0% /dev tmpfs                  914M  164K  914M   1% /dev/shm tmpfs                  914M  9.0M  905M   1% /run tmpfs                  914M     0  914M   0% /sys/fs/cgroup /dev/sda1              497M   96M  401M  20% /boot /dev/sr0               3.5G  3.5G     0 100% /run/media/root/RHEL-7.0 Server.x86_64 [root@rac1 ~]# fdisk -l Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: dos Disk identifier: 0x000aa76d    Device Boot      Start         End      Blocks   Id  System /dev/sda1   *        2048     1026047      512000   83  Linux /dev/sda2         1026048    41943039    20458496   8e  Linux LVM Disk /dev/mapper/rhel-root: 18.8 GB, 18798870528 bytes, 36716544 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/rhel-swap: 2147 MB, 2147483648 bytes, 4194304 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes 一块20个硬盘,2G的swap,18G的根目录 [root@rac1 ~]# vgdisplay -v     Finding all volume groups     Finding volume group "rhel"   --- Volume group ---   VG Name               rhel   System ID                Format                lvm2   Metadata Areas        1   Metadata Sequence No  3   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                2   Open LV               2   Max PV                0   Cur PV                1   Act PV                1   VG Size               19.51 GiB   PE Size               4.00 MiB   Total PE              4994   Alloc PE / Size       4994 / 19.51 GiB   Free  PE / Size       0 / 0      VG UUID               cnpKO5-HowL-pwbZ-PGvi-81fk-3JXF-u5Uqte       --- Logical volume ---   LV Path                /dev/rhel/root   LV Name                root   VG Name                rhel   LV UUID                8JfkKC-nnvl-KhHD-e5wx-yISp-O3Ys-xxnVWD   LV Write Access        read/write   LV Creation host, time localhost, 2015-04-29 17:10:28 +0800   LV Status              available   # open                 1   LV Size                17.51 GiB   Current LE             4482   Segments               1   Allocation             inherit   Read ahead sectors     auto   - currently set to     256   Block device           253:0       --- Logical volume ---   LV Path                /dev/rhel/swap   LV Name                swap   VG Name                rhel   LV UUID                H14cCa-ignp-pPag-G9QU-sWjc-WoB3-XklFXu   LV Write Access        read/write   LV Creation host, time localhost, 2015-04-29 17:10:29 +0800   LV Status              available   # open                 2   LV Size                2.00 GiB   Current LE             512   Segments               1   Allocation             inherit   Read ahead sectors     auto   - currently set to     256   Block device           253:1       --- Physical volumes ---   PV Name               /dev/sda2        PV UUID               wRff8C-8kkz-0E1N-CKLh-YnBu-7qAf-DBa8KF   PV Status             allocatable   Total PE / Free PE    4994 / 0     [root@rac1 ~]# pvdisplay -v     Scanning for physical volume names   --- Physical volume ---   PV Name               /dev/sda2   VG Name               rhel   PV Size               19.51 GiB / not usable 3.00 MiB   Allocatable           yes (but full)   PE Size               4.00 MiB   Total PE              4994   Free PE               0   Allocated PE          4994   PV UUID               wRff8C-8kkz-0E1N-CKLh-YnBu-7qAf-DBa8KF 一个卷组rhel,一个pv是/dev/sda2 [root@rac2 ~]# echo "- - -" > /sys/class/scsi_host/host0/scan [root@rac1 ~]# fdisk -l Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: dos Disk identifier: 0x000aa76d    Device Boot      Start         End      Blocks   Id  System /dev/sda1   *        2048     1026047      512000   83  Linux /dev/sda2         1026048    41943039    20458496   8e  Linux LVM Disk /dev/sdb: 16.1 GB, 16106127360 bytes, 31457280 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/rhel-root: 18.8 GB, 18798870528 bytes, 36716544 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/mapper/rhel-swap: 2147 MB, 2147483648 bytes, 4194304 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes 在线添加一块16G的硬盘。 [root@rac1 ~]# pvcreate /dev/sdb   Physical volume "/dev/sdb" successfully created [root@rac1 ~]# pvdisplay   --- Physical volume ---   PV Name               /dev/sda2   VG Name               rhel   PV Size               19.51 GiB / not usable 3.00 MiB   Allocatable           yes (but full)   PE Size               4.00 MiB   Total PE              4994   Free PE               0   Allocated PE          4994   PV UUID               wRff8C-8kkz-0E1N-CKLh-YnBu-7qAf-DBa8KF       "/dev/sdb" is a new physical volume of "15.00 GiB"   --- NEW Physical volume ---   PV Name               /dev/sdb   VG Name                  PV Size               15.00 GiB   Allocatable           NO   PE Size               0      Total PE              0   Free PE               0   Allocated PE          0   PV UUID               XkelY2-zsv3-1Cpu-GRkJ-RmqZ-CKTs-XmHVkR     [root@rac1 ~]# pvscan   PV /dev/sda2   VG rhel            lvm2 [19.51 GiB / 0    free]   PV /dev/sdb                       lvm2 [15.00 GiB]   Total: 2 [34.51 GiB] / in use: 1 [19.51 GiB] / in no VG: 1 [15.00 GiB] [root@rac1 ~]# vgextend rhel /dev/sdb   Volume group "rhel" successfully extended [root@rac1 ~]# pvdisplay   --- Physical volume ---   PV Name               /dev/sda2   VG Name               rhel   PV Size               19.51 GiB / not usable 3.00 MiB   Allocatable           yes (but full)   PE Size               4.00 MiB   Total PE              4994   Free PE               0   Allocated PE          4994   PV UUID               wRff8C-8kkz-0E1N-CKLh-YnBu-7qAf-DBa8KF       --- Physical volume ---   PV Name               /dev/sdb   VG Name               rhel   PV Size               15.00 GiB / not usable 4.00 MiB   Allocatable           yes   PE Size               4.00 MiB   Total PE              3839   Free PE               3839   Allocated PE          0   PV UUID               XkelY2-zsv3-1Cpu-GRkJ-RmqZ-CKTs-XmHVkR 创建PV,加入VG [root@rac1 ~]# swapoff -v /dev/sdb swapoff /dev/sdb swapoff: /dev/sdb: swapoff failed: Invalid argument [root@rac1 ~]# swapoff -v /dev/rhel/swap swapoff /dev/rhel/swap [root@rac1 ~]# lvresize -L+1.5G /dev/rhel/swap   Extending logical volume swap to 3.50 GiB   Logical volume swap successfully resized [root@rac1 ~]# mkswap /dev/rhel/swap mkswap: /dev/rhel/swap: warning: wiping old swap signature. Setting up swapspace version 1, size = 3670012 KiB no label, UUID=6323ca9b-e968-4c0e-8852-51aee7c93407 [root@rac1 ~]# swapon /dev/rhel/swap [root@rac1 ~]# free -m              total       used       free     shared    buffers     cached Mem:          1826        937        889          9          0        326 -/+ buffers/cache:        610       1216 Swap:         3583          0       3583 [root@rac1 ~]# swap扩展到3.5G [root@rac1 ~]# df -h Filesystem             Size  Used Avail Use% Mounted on /dev/mapper/rhel-root   18G  5.0G   13G  29% / devtmpfs               908M     0  908M   0% /dev tmpfs                  914M  164K  914M   1% /dev/shm tmpfs                  914M  9.0M  905M   1% /run tmpfs                  914M     0  914M   0% /sys/fs/cgroup /dev/sda1              497M   96M  401M  20% /boot /dev/sr0               3.5G  3.5G     0 100% /run/media/root/RHEL-7.0 Server.x86_64 [root@rac1 ~]# lvextend -L +5G /dev/mapper/rhel-root   Extending logical volume root to 22.51 GiB   Logical volume root successfully resized [root@rac1 ~]# xfs_growfs /dev/rhel/root meta-data=/dev/mapper/rhel-root  isize=256    agcount=4, agsize=1147392 blks          =                       sectsz=512   attr=2, projid32bit=1          =                       crc=0 data     =                       bsize=4096   blocks=4589568, imaxpct=25          =                       sunit=0      swidth=0 blks naming   =version 2              bsize=4096   ascii-ci=0 ftype=0 log      =internal               bsize=4096   blocks=2560, version=2          =                       sectsz=512   sunit=0 blks, lazy-count=1 realtime =none                   extsz=4096   blocks=0, rtextents=0 data blocks changed from 4589568 to 5900288 [root@rac1 ~]# df -h Filesystem             Size  Used Avail Use% Mounted on /dev/mapper/rhel-root   23G  5.0G   18G  22% / devtmpfs               908M     0  908M   0% /dev tmpfs                  914M  164K  914M   1% /dev/shm tmpfs                  914M  9.0M  905M   1% /run tmpfs                  914M     0  914M   0% /sys/fs/cgroup /dev/sda1              497M   96M  401M  20% /boot /dev/sr0               3.5G  3.5G     0 100% /run/media/root/RHEL-7.0 Server.x86_64 [root@rac1 ~]# 根目录扩展到23G,大功告成。
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