阿里云云盘在线扩容

扩容须知

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1. 为需要扩容的磁盘创建快照，防止数据丢失
2. 记录分区表信息

   <root@sys-ops-jks02 ~># fdisk -lu
   
   Disk /dev/vda: 42.9 GB, 42949672960 bytes, 83886080 sectors
   Units = sectors of 1 * 512 = 512 bytes
   Sector size (logical/physical): 512 bytes / 512 bytes
   I/O size (minimum/optimal): 512 bytes / 512 bytes
   Disk label type: dos
   Disk identifier: 0x0008de3e
   
      Device Boot      Start         End      Blocks   Id  System
   /dev/vda1   *        2048    83884031    41940992   83  Linux

3. 确认分区格式

   <root@sys-ops-jks02 ~># parted -l
   Model: Virtio Block Device (virtblk)
   Disk /dev/vda: 42.9GB
   Sector size (logical/physical): 512B/512B
   Partition Table: msdos
   Disk Flags:
   
   Number  Start   End     Size    Type     File system  Flags
    1      1049kB  42.9GB  42.9GB  primary  ext4         boot
   
   
   # 第二种方法
   <root@sys-ops-jks02 ~># blkid /dev/vda
   /dev/vda: PTTYPE="dos"