一、题目与目的
今天在利用nacos服务时发现怎么操纵都会报错，原因是磁盘空间已满，正好偶然间，研究一下怎么对Centos举行扩容
二、解决方法
1、首先，通过下令df -h 观察磁盘占用环境
可以发现根目录已经被写满了，这会导致全部写操纵都无法举行
2、先关闭虚拟机，然后在VMware的设置中选择添加一块新的硬盘（不停点下一步就可以了）
我选择了扩容40G
3、重启虚拟机后通过下令lsblk可以发现多了一个分区sdb（原来只有sda）
所以接下来对sdb举行分区操纵
4、对sdb举行分区操纵
- [root@itcast ~]# fdisk /dev/sdb
- 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.
- Device does not contain a recognized partition table
- Building a new DOS disklabel with disk identifier 0xdeeb604b.
- Command (m for help): m
- Command action
- a toggle a bootable flag
- b edit bsd disklabel
- c toggle the dos compatibility flag
- d delete a partition
- g create a new empty GPT partition table
- G create an IRIX (SGI) partition table
- l list known partition types
- m print this menu
- n add a new partition
- o create a new empty DOS partition table
- p print the partition table
- q quit without saving changes
- s create a new empty Sun disklabel
- t change a partition's system id
- u change display/entry units
- v verify the partition table
- w write table to disk and exit
- x extra functionality (experts only)
- Command (m for help): n #输入n新建一个分区
- Partition type:
- p primary (0 primary, 0 extended, 4 free)
- e extended
- Select (default p): p #输入p,将分区创建为主分区
- Partition number (1-4, default 1): 1
- First sector (2048-83886079, default 2048): #默认
- Using default value 2048
- Last sector, +sectors or +size{K,M,G} (2048-83886079, default 83886079):
- Using default value 83886079
- Partition 1 of type Linux and of size 40 GiB is set
- Command (m for help): t #输入t改变分区类型
- Selected partition 1
- Hex code (type L to list all codes): 8e #输入8e对应LVM
- Changed type of partition 'Linux' to 'Linux LVM'
- Command (m for help): w #保存
- The partition table has been altered!
- Calling ioctl() to re-read partition table.
- Syncing disks.
- [root@itcast ~]# lsblk
- NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
- sda 8:0 0 40G 0 disk
- ├─sda1 8:1 0 200M 0 part /boot
- └─sda2 8:2 0 39.8G 0 part
- ├─centos-root 253:0 0 30G 0 lvm /
- └─centos-swap 253:1 0 9.8G 0 lvm [SWAP]
- sdb 8:16 0 40G 0 disk
- └─sdb1 8:17 0 40G 0 part
- sr0 11:0 1 1024M 0 rom
6、格式化sdb1
- [root@itcast ~]# mkfs.xfs /dev/sdb1
- meta-data=/dev/sdb1 isize=512 agcount=4, agsize=2621376 blks
- = sectsz=512 attr=2, projid32bit=1
- = crc=1 finobt=0, sparse=0
- data = bsize=4096 blocks=10485504, imaxpct=25
- = sunit=0 swidth=0 blks
- naming =version 2 bsize=4096 ascii-ci=0 ftype=1
- log =internal log bsize=4096 blocks=5119, version=2
- = sectsz=512 sunit=0 blks, lazy-count=1
- realtime =none extsz=4096 blocks=0, rtextents=0
8、开始扩容
- [root@itcast ~]# pvcreate /dev/sdb1 #将sdb1分区变为pv
- WARNING: xfs signature detected on /dev/sdb1 at offset 0. Wipe it? [y/n]: y
- Wiping xfs signature on /dev/sdb1.
- Physical volume "/dev/sdb1" successfully created.
- [root@itcast ~]# vgextend centos /dev/sdb1 #将/dev/sdc1卷加入根目录所在的卷组名centos
- Couldn't create temporary archive name. ##报错啦！
执行 rm -rf /tmp/*
- [root@itcast ~]# vgextend centos /dev/sdb1
- Volume group "centos" successfully extended
接着检察卷组信息 （记住Free PE）
把全部空间分配给根分区
- [root@itcast ~]# lvextend -l +10239 /dev/centos/root #10239=free pe
- Size of logical volume centos/root changed from 30.00 GiB (7680 extents) to <70.00 GiB (17919 extents).
- Logical volume centos/root successfully resized.
- [root@itcast ~]# xfs_growfs /dev/centos/root
- meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=1966080 blks
- = sectsz=512 attr=2, projid32bit=1
- = crc=1 finobt=0 spinodes=0
- data = bsize=4096 blocks=7864320, imaxpct=25
- = sunit=0 swidth=0 blks
- naming =version 2 bsize=4096 ascii-ci=0 ftype=1
- log =internal bsize=4096 blocks=3840, version=2
- = sectsz=512 sunit=0 blks, lazy-count=1
- realtime =none extsz=4096 blocks=0, rtextents=0
- data blocks changed from 7864320 to 18349056
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