Llinux系统(Centos/Ubuntu/Debian)弹性云系统盘扩容方法windows系统请参考：https://www.west.cn/faq/list.asp?unid=2220 windows数据盘扩容请参考：https://www.west.cn/faq/list.asp?unid=512 linux数据盘扩容请参考：https://www.west.cn/faq/list.asp?unid=587 警告： 1.调整过分区管理方式的，例如lvm管理方式，请忽略此教程。 2.ubuntu18系统暂不支持脚本扩容,请手动扩容,参看下面ubuntu18部分,用parted操作 脚本自动处理（推荐） SSH登录服务器下载自动执行脚本 （注意：不要在宝塔面板终端执行）： wget -O auto_expansion.sh http://downinfo.myhostadmin.net/vps/auto_expansion.sh && bash auto_expansion.sh && rm -rf auto_expansion.sh 手工处理方法 红色为您要键入的指令，绿色为需要注意的内容，蓝色为说明 特别提醒：删除分区后一定要先建立分区再保存，删除后点了保存会导致数据丢失，如果对linux不熟悉的，建议提交维护工单我司手工处理，费用100元。该操作有风险，为避免误操作导致数据丢失，操作前请对您的重要数据进行备份！
[root@ebs-89713 ~]gdisk /dev/vda //操作根分区磁盘 Command (? for help): p //查看分区 Disk /dev/vda: 104857600 sectors, 50.0 GiB Logical sector size: 512 bytes Disk identifier (GUID): B7172F0B-2C30-4535-981D-F0ED8B4A6065 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 104857566 Partitions will be aligned on 2048-sector boundaries Total free space is 41945021 sectors (20.0 GiB) Number Start (sector) End (sector) Size Code Name 1 2048 62914559 30.0 GiB 8300 Linux filesystem //注意这个值 Command (? for help): d //删除分区 Using 1 Command (? for help): 1 b back up GPT data to a file c change a partition's name d delete a partition i show detailed information on a partition l list known partition types n add a new partition o create a new empty GUID partition table (GPT) p print the partition table q quit without saving changes r recovery and transformation options (experts only) s sort partitions t change a partition's type code v verify disk w write table to disk and exit x extra functionality (experts only) ? print this menu Command (? for help): n Partition number (1-128, default 1): 1 First sector (34-104857566, default = 2048) or {+-}size{KMGTP}: 2048 //刚才记录的 Last sector (2048-104857566, default = 104857566) or {+-}size{KMGTP}: //直接回车 Current type is 'Linux filesystem' Hex code or GUID (L to show codes, Enter = 8300): //直接回车 Changed type of partition to 'Linux filesystem' Command (? for help): w Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING PARTITIONS!! Do you want to proceed? (Y/N): y OK; writing new GUID partition table (GPT) to /dev/vda. Warning: The kernel is still using the old partition table. The new table will be used at the next reboot. The operation has completed successfully. [root@ebs ~]#reboot //重启让分区生效 [root@ebs ~]#resize2fs -f /dev/vda1 //开始扩容根分区,如果是centos8.x系统需要使用这个命令：xfs_growfs /dev/vda1 resize2fs -f /dev/vda1 resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/vda1 is mounted on /; on-line resizing required old desc_blocks = 2, new_desc_blocks = 4 Performing an on-line resize of /dev/vda1 to 13106939 (4k) blocks. The filesystem on /dev/vda1 is now 13106939 blocks long. [root@ebs ~]#df -vh //完成,查看新的根分区大小 centos7,centos8用fdisk工具 [root@ebs-89713 ~]# fdisk /dev/vda 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): p Disk /dev/vda: 53.7 GB, 53687091200 bytes, 104857600 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: 0x000c1d0e Device Boot Start End Blocks Id System /dev/vda1 2048 83886079 41942016 83 Linux Command (m for help): d Selected partition 1 Partition 1 is deleted 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): 1 First sector (2048-104857599, default 2048): 2048 Last sector, +sectors or +size{K,M,G} (2048-104857599, default 104857599): 104857599 Partition 1 of type Linux and of size 50 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@ebs-89713 ~]# reboot //重启让分区生效 重启完,重新登陆服务器 centos7系统执行: [root@ebs-89713 ~]# resize2fs -f /dev/vda1 //开始扩容根分区 centos8系统执行: [root@ebs-89713 ~]# xfs_growfs /dev/vda1 //开始扩容根分区 [root@ebs-89713 ~]# df -vh //完成,查看新的根分区大小 Ubuntu16,Ubuntu20,debian8,debian9用parted工具 [root@ebs-89713 ~] parted /dev/vda (parted) unit b (parted) print Model: Virtio 块设备 (virtblk) 磁盘 /dev/vda: 107374182400B Sector size (logical/physical): 512B/512B 分区表：msdos 数字 开始： End 大小 类型 文件系统 标志 1 1048576B 32211206143B 32210157568B primary ext4 启动 (parted) rm 1 //删除1分区,记1的开始 删除2分区,记2分区的开始 警告: Partition /dev/vda1 is being used. Are you sure you want to continue? 是/Yes/否/No? yes 错误: Partition(s) 1 on /dev/vda have been written, but we have been unable to inform the kernel of the change, probably because it/they are in use. As a result, the old partition(s) will remain in use. You should reboot now before making further changes. 忽略/Ignore/放弃/Cancel? I (parted) mkpart 分区类型？ primary/主分区/extended/扩展分区? p 文件系统类型？ [ext2]? 起始点？ 1048576B //删除1分区,记1的开始 删除2分区,记2分区的开始 结束点？ 100% (parted) print Model: Virtio 块设备 (virtblk) 磁盘 /dev/vda: 107374182400B Sector size (logical/physical): 512B/512B 分区表：msdos 数字 开始： End 大小 类型 文件系统 标志 1 1048576B 107374182399B 107373133824B primary ext4 (parted) quit 信息: You may need to update /etc/fstab. [root@ebs-89713 ~]# reboot //重启让分区生效 重启完,重新登陆服务器 [root@ebs-89713 ~]# resize2fs -f /dev/vda1 //开始扩容根分区 [root@ebs-89713 ~]# df -vh //完成,查看新的根分区大小 ubuntu18(系统盘存在两个分区vda1,vda2)用parted工具 root@ebs-89713:~# parted /dev/vda GNU Parted 3.2 Using /dev/vda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) unit b (parted) print Warning: Not all of the space available to /dev/vda appears to be used, you can fix the GPT to use all of the space (an extra 20971520 blocks) or continue with the current setting? Fix/Ignore? Fix Model: Virtio Block Device (virtblk) Disk /dev/vda: 42949672960B Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1048576B 2097151B 1048576B bios_grub 2 2097152B 32211206143B 32209108992B ext4 (parted) rm 2 Warning: Partition /dev/vda2 is being used. Are you sure you want to continue? Yes/No? Yes Error: Partition(s) 2 on /dev/vda have been written, but we have been unable to inform the kernel of the change, probably because it/they are in use. As a result, the old partition(s) will remain in use. You should reboot now before making further changes. Ignore/Cancel? I (parted) mkpart Partition name? []? //直接回车 File system type? [ext2]? //直接回车 Start? 2097152B //上面number 2中的start起始位置 End? 100% (parted) print Model: Virtio Block Device (virtblk) Disk /dev/vda: 42949672960B Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1048576B 2097151B 1048576B bios_grub 2 2097152B 42948624383B 42946527232B ext2 (parted) quit root@ebs-89713:~# reboot //重启让分区生效 重启完,重新登陆服务器 root@ebs-89713:~# resize2fs -f /dev/vda2 //开始扩容根分区 root@ebs-89713:~# df -vh //完成,查看新的根分区大小
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