Linux掛載磁盤 · k8s原理與實踐

[TOC] # 添加磁盤添加加新硬盤重啟服務器添加完之后就可以重啟機器了，如果你機器是開啟的，進入系統并不能看見你剛添加的那塊磁盤，只有等系統重啟，重新加載之后才會顯示安裝的那塊磁盤 # root賬號登錄系統 # 查看硬盤 ``` fdisk -l //磁盤命令 ``` ``` Disk /dev/sda: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000c4cb5 Device Boot Start End Blocks Id System /dev/sda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 2611 20458496 8e Linux LVM Disk /dev/sdb: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xd0f5c869 Device Boot Start End Blocks Id System /dev/sdb1 1 2610 20964793+ 83 Linux Disk /dev/sdc: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 ``` 可以看到這臺機器加載了三個磁盤sda、sdb、sdc 其中sda是初始磁盤，sdb已經初始化且經過使用，sdc是剛剛加載的，未格式化的新磁盤 # 創建新硬盤分區 ``` [root@localhost ~]# fdisk /dev/sdc #進入磁盤 Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel with disk identifier 0x45a3cadb. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable. Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): m Command action a toggle a bootable flag #設定可啟動標記 b edit bsd disklabel c toggle the dos compatibility flag d delete a partition #刪除一個分區 l list known partition types #各分區類型所對應的ID m print this menu #菜單 n add a new partition #添加一個分區 o create a new empty DOS partition table p print the partition table #顯示該磁盤下的當前分區信息 q quit without saving changes #不保存退出 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 #保存退出 x extra functionality (experts only) ``` ## 分區 ``` Command (m for help): p //打印分區信息,可以看到當前并沒有分區 Disk /dev/sdc: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x45a3cadb Device Boot Start End Blocks Id System Command (m for help): n //創建一個新的分區 Command action e extended//輸入e為創建擴展分區 p primary partition (1-4) //輸入p為創建邏輯分區 p Partition number (1-4): 1//劃分邏輯分區 First cylinder (1-2610, default 1): //我這里直接回車,是不想把該磁盤分成多個分區,把整個磁盤作為1個分區 Using default value 1 Last cylinder, +cylinders or +size{K,M,G} (1-2610, default 2610): Using default value 2610 Command (m for help): p //再次查看可以看到該磁盤已經有1個分區了 Disk /dev/sdc: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x45a3cadb Device Boot Start End Blocks Id System /dev/sdc1 1 2610 20964793+ 83 Linux Command (m for help): w //保存分區 The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. ``` ## `fdisk -l` 查看磁盤信息 ``` Disk /dev/sdc: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x406a4c58 Device Boot Start End Blocks Id System /dev/sdc1 1 2610 20964793+ 83 Linux ``` 第三塊磁盤/dev/sdc已經分區 # 格式化分區 ``` \[root@localhost ~\]\# mkfs.ext3 /dev/sdc1 //將/dev/sdc1格式化為ext3類型 ``` ``` [root@localhost ~]# mkfs.ext3 /dev/sdc1 mke2fs 1.41.12 (17-May-2010) 文件系統標簽= 操作系統:Linux 塊大小=4096 (log=2) 分塊大小=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 1310720 inodes, 5241198 blocks 262059 blocks (5.00%) reserved for the super user 第一個數據塊=0 Maximum filesystem blocks=4294967296 160 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 正在寫入inode表: 完成 Creating journal (32768 blocks): 完成 Writing superblocks and filesystem accounting information: 完成 This filesystem will be automatically checked every 31 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. ``` # `mount`掛載分區 ``` [root@localhost ~]# df -h //此時只有sda1和sdb1兩個磁盤掛載 Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 18G 15G 1.5G 92% / tmpfs 932M 76K 932M 1% /dev/shm /dev/sda1 485M 40M 421M 9% /boot /dev/sdb1 20G 1.2G 18G 7% /disk/diskone /dev/sr0 4.2G 4.2G 0 100% /media/CentOS_6.5_Final [root@localhost /]# cd /disk/ [root@localhost disk]# ll 總用量 4 drwxr-xr-x. 4 root root 4096 7月 28 17:04 diskone [root@localhost disk]# cd diskone/ [root@localhost diskone]# ll 總用量 20 drwx------. 2 root root 16384 7月 28 16:12 lost+found drwxr-xr-x. 2 root root 4096 7月 28 17:09 software [root@localhost diskone]# cd ../ [root@localhost disk]# mkdir disktwo //創建被掛載的路徑 [root@localhost disk]# ll 總用量 8 drwxr-xr-x. 4 root root 4096 7月 28 17:04 diskone drwxr-xr-x. 2 root root 4096 8月 1 16:48 disktwo [root@localhost disk]# mount /dev/sdc1 /disk/disktwo/ //進行掛載 [root@localhost disk]# df -h //再次查看,發現sdc1已經掛載在/disk/disktwo路徑下 Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 18G 15G 1.5G 92% / tmpfs 932M 76K 932M 1% /dev/shm /dev/sda1 485M 40M 421M 9% /boot /dev/sdb1 20G 1.2G 18G 7% /disk/diskone /dev/sr0 4.2G 4.2G 0 100% /media/CentOS_6.5_Final /dev/sdc1 20G 173M 19G 1% /disk/disktwo ``` # 開機自動掛載編輯/etc/fstab文件，再最后面添加 /dev/sdc1(磁盤分區) /disk/disktwo（掛載目錄） ext3（文件格式）defaults 0 0 ``` vi /etc/fstab /dev/sdc1(磁盤分區) /disk/disktwo（掛載目錄） ext3（文件格式）defaults 0 0 ``` > 來源 https://blog.csdn.net/weishujie000/article/details/76531924