Linux下扩展根分区-非LVM
在将workstation虚拟机导入至vsphere esxi 6.7 过程中因**/**根分区只有几百兆了，因此需要对根分区进行扩容，本文是在参考如下博文https://www.cnblogs.com/youngchaolin/p/11478740.html
另外虚拟机为workstation版本，在导入Vsphere Esxi过程中存在以下问题：
1.原虚拟机vmx文件版本不兼容，需查看现有Vsphere环境虚拟机vmx文件版本，并将原VM的vmx文件修改后上传
2.原虚拟机vmdk磁盘文件在上传至Vsphere Esxi后需使用vmfstools工具转换后方可使用（参考文章：https://blog.csdn.net/weixin_34185364/article/details/92690553）
- 成功测试系统为:
- Centos7.6，根分区文件类型为xfs
- Ubuntu18.04，根分区文件类型为ext4(Vsphere Esxi6.7虚拟机环境)
（1） 可以看出sda3是根分区，下面按照博客提示，先删除sda3根分区，然后重新创建sda3根分区，具体参考注释。
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1 [root@node03 ~]# fdisk /dev/sda
2 Welcome to fdisk (util-linux 2.23.2).
3
4 Changes will remain in memory only, until you decide to write them.
5 Be careful before using the write command.
6
7
8 Command (m for help): m
9 Command action
10 a toggle a bootable flag
11 b edit bsd disklabel
12 c toggle the dos compatibility flag
13 d delete a partition
14 g create a new empty GPT partition table
15 G create an IRIX (SGI) partition table
16 l list known partition types
17 m print this menu
18 n add a new partition
19 o create a new empty DOS partition table
20 p print the partition table
21 q quit without saving changes
22 s create a new empty Sun disklabel
23 t change a partition's system id
24 u change display/entry units
25 v verify the partition table
26 w write table to disk and exit
27 x extra functionality (experts only)
28
29 Command (m for help): d ##删除分区
30 Partition number (1-3, default 3): 3 ##临时先删除sda3分区
31 Partition 3 is deleted
32
33 Command (m for help): n #添加一个新的分区
34 Partition type:
35 p primary (2 primary, 0 extended, 2 free)
36 e extended
37 Select (default p): p #添加主分区
38 Partition number (3,4, default 3): 3 #指定分区号3，重新创建sda3分区
39 First sector (17303552-104857599, default 17303552): #回车
40 Using default value 17303552
41 Last sector, +sectors or +size{K,M,G} (17303552-104857599, default 104857599): #回车
42 Using default value 104857599
43 Partition 3 of type Linux and of size 41.8 GiB is set #提示OK
44
45 Command (m for help): w #按w保存退出
46 The partition table has been altered! #提示OK
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（2）重启系统
重启当前系统，可以选择systemctl reboot或者init 6来执行。
（3）扩容文件系统，使用命令 xfs_growfs /dev/sda3，可以看到成功扩展分区，根分区已扩容20G。
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1 [root@node03 ~]# xfs_growfs /dev/sda3
2 meta-data=/dev/sda3 isize=512 agcount=8, agsize=769984 blks
3 = sectsz=512 attr=2, projid32bit=1
4 = crc=1 finobt=0 spinodes=0
5 data = bsize=4096 blocks=5701376, imaxpct=25
6 = sunit=0 swidth=0 blks
7 naming =version 2 bsize=4096 ascii-ci=0 ftype=1
8 log =internal bsize=4096 blocks=2560, version=2
9 = sectsz=512 sunit=0 blks, lazy-count=1
10 realtime =none extsz=4096 blocks=0, rtextents=0
11 data blocks changed from 5701376 to 10944256
12 [root@node03 ~]# df -h
13 Filesystem Size Used Avail Use% Mounted on
14 /dev/sda3 42G 11G 32G 25% /
15 devtmpfs 2.9G 0 2.9G 0% /dev
16 tmpfs 3.0G 0 3.0G 0% /dev/shm
17 tmpfs 3.0G 13M 2.9G 1% /run
18 tmpfs 3.0G 0 3.0G 0% /sys/fs/cgroup
19 /dev/sda1 253M 153M 101M 61% /boot
20 tmpfs 595M 8.0K 595M 1% /run/user/990
21 tmpfs 595M 0 595M 0% /run/user/0
22 You have new mail in /var/spool/mail/root