/dev/mapper/centos-root 清理

随雨而安

一、告警现象

告警主机:   172.18.206.8
告警时间:   2021.02.27 18:45:05
告警等级:   Average
告警信息:   Free disk space is less than 20% on volume /
告警项目:   vfs.fs.size[/,pfree]
问题详情:   Free disk space on / (percentage):20 %
当前状态:   PROBLEM:20 %
事件ID:    407292687

 

二、清理步骤

1. 通过df -h 查看磁盘空间使用情况，可以看到根目录已经使用到81%了

[root@srv-09 ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root  184G  147G   37G  81% /
devtmpfs                  32G     0   32G   0% /dev
tmpfs                     32G   20K   32G   1% /dev/shm
tmpfs                     32G  3.2G   29G  11% /run
tmpfs                     32G     0   32G   0% /sys/fs/cgroup
/dev/sda2                465M  126M  312M  29% /boot
/dev/sdb1                549G   64G  458G  13% /data
tmpfs                    6.3G     0  6.3G   0% /run/user/1001
tmpfs                    6.3G     0  6.3G   0% /run/user/700
tmpfs                    6.3G     0  6.3G   0% /run/user/0

 

2. 进入根目录, 可以看到/opt 目录最大

[root@srv-09 ~]# cd /
[root@srv-09 /]# du -h -x --max-depth=1
37M     ./etc
2.3G    ./root
2.1G    ./tmp
606M    ./var
1.9G    ./usr
279M    ./home
0       ./media
0       ./mnt
122G    ./opt
0       ./srv
4.0K    ./script
147G    .

 

3. 进入根目录,可以看到 backup 目录占用了37G， 可以进行清理

[root@srv-09 /]# cd /opt
[root@srv-09 opt]# du -h -x --max-depth=1
0       ./rh
130M    ./tcloud_dev
12M     ./MegaRAID
37M     ./smartstorageadmin
134M    ./scripts
5.1G    ./install
0       ./software
7.8G    ./app
0       ./app2
0       ./app3
0       ./app4
37G     ./backup
0       ./backup2
0       ./backup3
0       ./backup4
56M     ./config-tool
127M    ./python
68M     ./sor-filebeat
44G     ./skywalking-agent
1.5G    ./data
60K     ./fnc_recon
4.0K    ./cert
46M     ./shardproxy
8.6G    ./wintonebak
15G     ./wintone
19M     ./node_exporter
122G    .

4. 进行backup 目录，使用rm -rf 清理掉一些备份文件

[root@srv-09 opt]# cd backup
[root@srv-09 backup]# du -h -x --max-depth=1
124M    ./20201013
3.5G    ./20201014
11G     ./20201019
252M    ./20201020
137M    ./20201021
2.5G    ./20201022
244M    ./20201028
6.6G    ./20201103
303M    ./20201105
181M    ./20201118
189M    ./20201125
123M    ./20201126
123M    ./20201127
188M    ./20201202
57M     ./20201203
188M    ./20201207
123M    ./20201211
184M    ./20201214
3.3G    ./20201216
191M    ./20201217
6.2G    ./20201223
150M    ./20201224
123M    ./20201229
124M    ./20201230
61M     ./20201231
191M    ./20210118
128M    ./20210120
191M    ./20210121
159M    ./20210128
130M    ./20210129
159M    ./20210201
159M    ./20210203
350M    ./20210224
160M    ./20210226
37G     .

　　

　

来源：https://www.cnblogs.com/dairenblog/p/14457136.html