现状：
centos 7，/对应分区为xfs格局，且无lvm。
只有一个分区，大小40GB，而整个磁盘大小200GB。

指标：
将残余磁盘空间都调配给以后分区。根本步骤为先调整分区大小，再调整mount的/的大小。

  • 查看以后/分区文件系统为xfs，大小40GB

    [root@hgcndn ~]# df -ThFilesystem     Type      Size  Used Avail Use% Mounted ondevtmpfs       devtmpfs  489M     0  489M   0% /devtmpfs          tmpfs     496M  8.0K  496M   1% /dev/shmtmpfs          tmpfs     496M   38M  458M   8% /runtmpfs          tmpfs     496M     0  496M   0% /sys/fs/cgroup/dev/sda1      xfs        40G   40G  585M  99% /tmpfs          tmpfs     100M     0  100M   0% /run/user/1001vagrant        vboxsf    376G  157G  220G  42% /vagrantvagrant_data   vboxsf    376G  157G  220G  42% /vagrant_datatmpfs          tmpfs     100M     0  100M   0% /run/user/1000

  • 查看以后分区信息

    [root@hgcndn ~]# lsblkNAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTsda      8:0    0  200G  0 disk└─sda1   8:1    0   40G  0 part /[root@hgcndn ~]# fdisk -l /dev/sdaDisk /dev/sda: 214.7 GB, 214748364800 bytes, 419430400 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: 0x0009ef1a Device Boot      Start         End      Blocks   Id  System/dev/sda1   *        2048    83886079    41942016   83  Linux

  • 装置须要的工具

    yum install cloud-utils-growpart gdisk -y

  • growpart重写分区表，调整分区大小，1为分区号，如果扩容sd2，则为2

    [root@hgcndn ~]# growpart /dev/sda 1CHANGED: partition=1 start=2048 old: size=83884032 end=83886080 new: size=419428319 end=419430367

  • 确认分区大小曾经调整为200GB

    [root@hgcndn ~]# lsblkNAME   MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTsda      8:0    0  200G  0 disk└─sda1   8:1    0  200G  0 part /

  • xfs_growfs 扩容 /

    [root@hgcndn ~]# xfs_growfs /meta-data=/dev/sda1              isize=512    agcount=4, agsize=2621376 blks       =                       sectsz=512   attr=2, projid32bit=1       =                       crc=1        finobt=0 spinodes=0data     =                       bsize=4096   blocks=10485504, imaxpct=25       =                       sunit=0      swidth=0 blksnaming   =version 2              bsize=4096   ascii-ci=0 ftype=1log      =internal               bsize=4096   blocks=5119, version=2       =                       sectsz=512   sunit=0 blks, lazy-count=1realtime =none                   extsz=4096   blocks=0, rtextents=0data blocks changed from 10485504 to 52428539

  • 确认/扩容为200GB

    [root@hgcndn ~]# df -ThFilesystem     Type      Size  Used Avail Use% Mounted ondevtmpfs       devtmpfs  489M     0  489M   0% /devtmpfs          tmpfs     496M  8.0K  496M   1% /dev/shmtmpfs          tmpfs     496M   38M  458M   8% /runtmpfs          tmpfs     496M     0  496M   0% /sys/fs/cgroup/dev/sda1      xfs       200G   40G  161G  20% /tmpfs          tmpfs     100M     0  100M   0% /run/user/1001vagrant        vboxsf    376G  157G  219G  42% /vagrantvagrant_data   vboxsf    376G  157G  219G  42% /vagrant_datatmpfs          tmpfs     100M     0  100M   0% /run/user/1000