总所周知啊！这Azure创建VM的时候系统盘的大小是没办法修改的,linux只有30G，windows只有127G，对于windows来说可能足够了，对于linux来说也许就不够了！
那如果我们想扩容系统盘怎么办呢？
有两种办法：
1.使用powershell或Azure cli创建（不会，主要是没看）
2.创建好系统以后再扩容
接下来主要讲第二种
创建好VM以后关掉它，点击磁盘，然后点击到OS磁盘
图片.png
然后点击配置就可以修改大小了
图片.png
然后还没完
登陆操作系统
[root@ZZBX-APP01P ~]# fdisk -l
Disk /dev/sdc: 274.9 GB, 274877906944 bytes, 536870912 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk /dev/sda: 68.7 GB, 68719476736 bytes, 134217728 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x000a8b4c
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 62914559 30944256 83 Linux
Disk /dev/sdb: 15.0 GB, 15032385536 bytes, 29360128 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x48631821
Device Boot Start End Blocks Id System
/dev/sdb1 128 29358079 14678976 83 Linux
[root@ZZBX-APP01P ~]# fdisk /dev/sda
The device presents a logical sector size that is smaller than
the physical sector size. Aligning to a physical sector (or optimal
I/O) size boundary is recommended, or performance may be impacted.
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.
Command (m for help): d
Partition number (1,2, default 2): 2
Partition 2 is deleted
Command (m for help): p
Disk /dev/sda: 68.7 GB, 68719476736 bytes, 134217728 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x000a8b4c
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
Command (m for help): n
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): p
Partition number (2-4, default 2): 2
First sector (1026048-134217727, default 1026048):
Using default value 1026048
Last sector, +sectors or +size{K,M,G} (1026048-134217727, default 134217727):
Using default value 134217727
Partition 2 of type Linux and of size 63.5 GiB is set
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
[root@ZZBX-APP01P ~]# reboot
重启以后登陆以后df -h还是没有,在执行一下xfs_growfs /dev/sda2就有了
原因：重启以便重读分区表后，再进行拉伸
[root@ZZBX-APP01P ~]# xfs_growfs /dev/sda2
meta-data=/dev/sda2 isize=512 agcount=4, agsize=1934016 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=7736064, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=3777, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 7736064 to 16648960
[root@ZZBX-APP01P ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 3.4G 0 3.4G 0% /dev
tmpfs 3.4G 0 3.4G 0% /dev/shm
tmpfs 3.4G 9.0M 3.4G 1% /run
tmpfs 3.4G 0 3.4G 0% /sys/fs/cgroup
/dev/sda2 64G 1.4G 63G 3% /
/dev/sda1 497M 64M 433M 13% /boot
/dev/sdb1 14G 41M 13G 1% /mnt/resource
tmpfs 696M 0 696M 0% /run/user/1000
[root@ZZBX-APP01P ~]#
