disk partition

[root@k8s-master1 ~]# cat /etc/fstab 
#
# /etc/fstab
# Created by anaconda on Wed Aug 15 20:43:40 2018
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=316f8b9b-386f-49df-9fca-f2971f86d0d1 /                       xfs     defaults        0 0
UUID=683349a4-c15d-4889-b476-7f39f8753959 /boot                   xfs     defaults        0 0
[root@k8s-master1 ~]# 



$ fdisk -l
[root@k8s-master1 ~]# fdisk /dev/sdc
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 0x4636a4e9.

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.

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): p

Disk /dev/sdc: 536.9 GB, 536870912000 bytes, 1048576000 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: 0x4636a4e9

   Device Boot      Start         End      Blocks   Id  System

Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1): 
First sector (2048-1048575999, default 2048): 
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-1048575999, default 1048575999): 
Using default value 1048575999
Partition 1 of type Linux and of size 500 GiB is set

Command (m for help): p

Disk /dev/sdc: 536.9 GB, 536870912000 bytes, 1048576000 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: 0x4636a4e9

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1            2048  1048575999   524286976   83  Linux

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@k8s-master1 ~]# fdisk -l

Disk /dev/sda: 32.2 GB, 32212254720 bytes, 62914560 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: 0x000b9d1d

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     1026047      512000   83  Linux
/dev/sda2         1026048    62914559    30944256   83  Linux

Disk /dev/sdc: 536.9 GB, 536870912000 bytes, 1048576000 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: 0x4636a4e9

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1            2048  1048575999   524286976   83  Linux

Disk /dev/sdb: 30.1 GB, 30064771072 bytes, 58720256 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: 0xfb6852ba

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1             128    58718207    29359040   83  Linux
[root@k8s-master1 ~]# 


mkfs -t ext4 /dev/sdc1

[root@k8s-master1 ~]# mkfs -t ext4 /dev/sdc1
mke2fs 1.42.9 (28-Dec-2013)
Discarding device blocks: done                            
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
32768000 inodes, 131071744 blocks
6553587 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2279604224
4000 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks: 
	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
	4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 
	102400000

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done     

[root@k8s-master1 ~]# 

mount -t ext4 -o defaults /dev/sdc1 /opt/k8s

[root@k8s-master1 ~]# mkdir -p /opt/k8s
[root@k8s-master1 ~]# mount -t ext4 -o defaults /dev/sdc1 /opt/k8s
[root@k8s-master1 ~]# mount | grep /dev/sdc1
/dev/sdc1 on /opt/k8s type ext4 (rw,relatime,data=ordered)
[root@k8s-master1 ~]# 



[root@k8s-master1 ~]# ls -l /dev/disk/by-uuid/
total 0
lrwxrwxrwx 1 root root 10 May 16 17:12 029694db-3f2d-43e1-b7d1-966e0953a4f1 -> ../../sdb1
lrwxrwxrwx 1 root root 10 May 16 17:12 316f8b9b-386f-49df-9fca-f2971f86d0d1 -> ../../sda2
lrwxrwxrwx 1 root root 10 May 16 17:12 683349a4-c15d-4889-b476-7f39f8753959 -> ../../sda1
lrwxrwxrwx 1 root root 10 May 16 17:39 6c772e2d-ecdb-4653-a459-eefd99455f68 -> ../../sdc1
[root@k8s-master1 ~]# 
[root@k8s-master1 ~]# blkid
/dev/sda1: UUID="683349a4-c15d-4889-b476-7f39f8753959" TYPE="xfs" 
/dev/sda2: UUID="316f8b9b-386f-49df-9fca-f2971f86d0d1" TYPE="xfs" 
/dev/sdc1: UUID="6c772e2d-ecdb-4653-a459-eefd99455f68" TYPE="ext4" 
/dev/sdb1: UUID="029694db-3f2d-43e1-b7d1-966e0953a4f1" TYPE="ext4" 
[root@k8s-master1 ~]# 


[root@k8s-master1 ~]# vim /etc/fstab
UUID=6c772e2d-ecdb-4653-a459-eefd99455f68 /opt/k8s                ext4    defaults        0 0
[root@k8s-master1 ~]# 
重启系统检查 hostname 和挂载是否生效