typ** command lsblk for checking the space added
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 40G 0 disk
├─sda1 8:1 0 1G 0 part /extra-storage
└─sda2 8:2 0 39G 0 part
├─cl_stag--elk--testing1-root 253:0 0 35.1G 0 lvm /
└─cl_stag--elk--testing1-swap 253:1 0 4G 0 lvm [SWAP]
sdb 8:16 0 20G 0 disk 20GB added
sr0 11:0 1 1024M 0 rom
[root@stag-elk-testing1 extra-storage]# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.32.1).
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.
Created a new DOS disklabel with disk identifier 0xcc8319d1.
Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-41943039, default 2048): 2048
Last sector, +sectors or +size{K,M,G,T,P} (2048-41943039, default 41943039): try enter and then if signature option comes apply for remove
Created a new partition 1 of type 'Linux' and of size 20 GiB.
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.
[root@stag-elk-testing1 extra-storage]# fdisk -l clear picture of the partitions and space alloted to it
Disk /dev/sda: 40 GiB, 42949672960 bytes, 83886080 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 1048576 bytes
Disklabel type: dos
Disk identifier: 0xa263bb60
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 2099199 2097152 1G 83 Linux
/dev/sda2 2099200 83886079 81786880 39G 8e Linux LVM
Disk /dev/mapper/cl_stag--elk--testing1-root: 35.1 GiB, 37652267008 bytes, 73539584 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 1048576 bytes
Disk /dev/mapper/cl_stag--elk--testing1-swap: 4 GiB, 4219469824 bytes, 8241152 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 1048576 bytes
Disk /dev/sdb: 20 GiB, 21474836480 bytes, 41943040 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 1048576 bytes
Disklabel type: dos
Disk identifier: 0xcc8319d1
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 41943039 41940992 20G 83 Linux
[root@stag-elk-testing1 extra-storage]# mkfs.ext4 /dev/s Formatting
sda sda2 sdb1 sg1 shm/ snd/ stderr stdout
sda1 sdb sg0 sg2 snapshot sr0 stdin
[root@stag-elk-testing1 extra-storage]# mkfs.ext4 /dev/sdb
sdb sdb1
[root@stag-elk-testing1 extra-storage]# mkfs.ext4 /dev/sdb1 Formatting
mke2fs 1.45.6 (20-Mar-2020)
Discarding device blocks: done
Creating filesystem with 5242624 4k blocks and 1310720 inodes
Filesystem UUID: 940eadc0-dbc0-4519-8bc2-c5d4d23c4823
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
我使用上面的sdb1创建了一个分区，其中有30GB的东西。 我想将它安装在 /home/kafka_data ，那里已经有 20GB 和数据。 问题是，当我在 /home/kafka_data 安装该空间时，所有数据都被替换并隐藏，并且我的 kafka 停止工作。 在 df-h 的输出中，现在有两个 home，一个是旧的，有 20 GB，另一个是 /home/kafka_data 30 GB 空间。 但较旧的数据被隐藏 /home/kafka_data 为空。 我想要在现有 20GB 的 /home/kafka_data 中额外增加 30GB，因为我的日志很大。
我备份了/home/kafka_data和consumer_offsets/topics目录中的所有数据，并在/home/kafka_data上安装了30GB后将它们复制到kafka_data中，以便kafka在有20GB时可以像以前一样运行。但是我的kafka没有运行，我无法理解为什么我的kafka在挂载后没有运行我有三个kafka节点，并且我在一个节点上完成了这一点。
需要在现有 20GB 的 /home/kafka_data 中额外增加 30GB，因为我的日志很大。
获取更大的硬盘，或者使用云提供的 Kafka 服务而不是您自己的硬件。您无法通过将分区安装为现有主目录来“组合”存储；这不是分区的工作原理。挂载分区将有效隐藏现有的操作系统分区文件指针，是的。要跨多个驱动器扩展容量，您需要 ZFS 池之类的东西，而不是 EXT4 分区。
Kafka 支持
log.dirs df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 2.0G 0 2.0G 0% /dev/shm
tmpfs 2.0G 17M 1.9G 1% /run
tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
/dev/mapper/cl_stag--elk--testing1-root 36G 2.0G 34G 6% /
/dev/sda1 976M 120M 789M 14% /boot
tmpfs 390M 0 390M 0% /run/user/0
adding 5gb from sdb1 to root
pvcreate /dev/sdb1
vgextend cl_stag-elk-testing1 /dev/sdb1
lvextend -l +100%FREE /dev/cl_stag-elk-testing1/root
sudo xfs_growfs /
reducing 5gb from root
df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 2.0G 0 2.0G 0% /dev/shm
tmpfs 2.0G 17M 1.9G 1% /run
tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
/dev/mapper/cl_stag--elk--testing1-root 41G 2.0G 39G 5% /
/dev/sda1 976M 120M 789M 14% /boot
tmpfs 390M 0 390M
lvreduce -L -5G /dev/cl_stag-elk-testing1/root
sudo xfs_growfs /meta-data=/dev/mapper/cl_stag--elk--testing1-root isize=512 agcount=5, agsize=2298112 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=1 finobt=1, sparse=1, rmapbt=0
= reflink=1
data = bsize=4096 blocks=10502144, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0, ftype=1
log =internal log bsize=4096 blocks=4488, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data size 9191424 too small, old size is 10502144 which step is missing?