服务器磁盘空间扩充
今天发现es日志未记录,检查了filebeat、elasticsearch、logstash之后发现es的索引都变成了只读状态,手动修改索引模式之后,过几分钟又变成了只读状态。进一步翻阅资料,才知道原因是一旦在存储超过95%的磁盘中的节点上分配了一个或多个分片的任何索引,该索引将被强制进入只读模式。所以只能扩充磁盘空间了。下面简单描述下磁盘扩充的步骤。
磁盘原来已经有两个分区了,但是分配的空间都不大。
-
增加磁盘,通过管理端挂载新的磁盘sdc; -
使用fdisk /dev/sdc,创建新分区;
[root@localhost indices]
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x5799aeba.
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: The size of this disk is 2.2 TB (2199023255552 bytes).
DOS partition table format can not be used on drives for volumes
larger than (2199023255040 bytes) for 512-byte sectors. Use parted(1) and GUID
partition table format (GPT).
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): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-267349, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-267349, default 267349):
Using default value 267349
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
- 然后创建物理卷,使用pvcreate /dev/sdc1命令;注意:这里很多文章里要求重启系统,这里其实可以不用重启,可直接操作,不影响服务器的正常运行;
[root@localhost indices]# pvcreate /dev/sdc1
Physical volume "/dev/sdc1" successfully created
- 使用vgscan查看 物理卷组 名称;
[root@localhost indices]
Reading all physical volumes. This may take a while...
Found volume group "VolGroup" using metadata type lvm2
- 将刚才增加的物理扇区加载到卷组中,这里使用 vgextend VolGroup /dev/sdc1;
[root@localhost indices]
Volume group "VolGroup" successfully extended
- 增加卷组的大小,这里使用lvextend -L +2048G /dev/mapper/VolGroup-lv_root;
[root@localhost indices]
Size of logical volume VolGroup/lv_root changed from 135.47 GiB (34681 extents) to 2.13 TiB (558848 extents).
Logical volume lv_root successfully resized.
- 使用df -h查看空间扩充情况,发现空间并未扩充,这是因为文件系统还未同步;
[root@localhost indices]
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
134G 119G 8.4G 94% /
tmpfs 32G 72K 32G 1% /dev/shm
/dev/sda1 477M 41M 411M 10% /boot
- 同步文件系统,使用xfs_growfs或者resize2fs同步文件系统,如下操作;
[root@localhost indices]
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/mapper/VolGroup-lv_root is mounted on /; on-line resizing required
old desc_blocks = 9, new_desc_blocks = 137
Performing an on-line resize of /dev/mapper/VolGroup-lv_root to 572260352 (4k) blocks.
The filesystem on /dev/mapper/VolGroup-lv_root is now 572260352 blocks long.
- 再使用df -h 查看空间扩容情况
[root@localhost indices]
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
2.1T 125G 1.9T 7% /
tmpfs 32G 72K 32G 1% /dev/shm
/dev/sda1 477M 41M 411M 10% /boot
- 由于CentOS6和CentOS7在默认根文件系统的文件系统格式存在差异,需要判断是否为xfs,如果是xfs则应该使用xfs_growfs而不是一味的使用resize2fs。
总结:存储扩充的大概步骤就是上述内容,由于项目服务器较多,最近扩充存储比较频繁,所以把步骤都记录下来,希望其他有需要的朋友可以参考。
参考:https://www.cnblogs.com/mrwuzs/p/10310285.html 参考:https://blog.csdn.net/weixin_39807859/article/details/111646300
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