root盘满了怎么办
# 问题
- /dev/mapper/centos-root 占用100%导致Tab键用不了，而且docker微服务应用的验证码出不来
[root@summer ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 63G 0 63G 0% /dev
tmpfs 63G 24K 63G 1% /dev/shm
tmpfs 63G 1.1G 62G 2% /run
tmpfs 63G 0 63G 0% /sys/fs/cgroup
/dev/mapper/centos-root 50G 50G 20K 100% /
/dev/sda2 1014M 208M 807M 21% /boot
/dev/mapper/centos-home 4.5T 188G 4.4T 5% /home
tmpfs 13G 0 13G 0% /run/user/987
tmpfs 13G 64K 13G 1% /run/user/0
overlay 50G 50G 20K 100% /var/lib/docker/overlay2/bc5fc2456c87054300bc3d0e2e619e17078de019849e1bf19fba1edcd66bc6af/merged
shm 64M 0 64M 0% /var/lib/docker/containers/e66aa9db52490a4ec4f39809c4bbf9212ede0059307e21856160515970c29be5/mounts/shm
overlay 50G 50G 20K 100% /var/lib/docker/overlay2/8f36525342c66b508369735032f3763712ef381da76a046173d718972b51fbdf/merged
overlay 50G 50G 20K 100% /var/lib/docker/overlay2/73c0bdf479c40526cdd1ab9f85ea0355fb7986ea4514e6925a2a954216f28bf0/merged
shm 64M 0 64M 0% /var/lib/docker/containers/cfe748305f892a932337df13af27b0662acc1aa2cfa112bea4b37fe3d3e16027/mounts/shm
overlay 50G 50G 20K 100% /var/lib/docker/overlay2/8a45574efb09a4740a6ea31bf8a31acd0b49e7ab738934261ebaf61623ad98d0/merged
shm 64M 0 64M 0% /var/lib/docker/containers/06c90561da84bc70c4fdb826a0f902ac3df0df19535a42f6f6052ddc92350a54/mounts/shm
shm 64M 0 64M 0% /var/lib/docker/containers/30271ff7afc6c09a368dbf42b1567650013a1b56fba7991322187976296c738e/mounts/shm# 解决方式一（删）
- 查找大文件，对于过高目录中的内容适当删减腾出一些空间
[root@summer ~]# cd /
[root@summer /]# du -h -x --max-depth=1
59M ./etc
123M ./root
du: cannot access ‘./var/lib/rsyslog/imjournal.state.tmp’: No such file or directory
40G ./var
82M ./tmp
5.4G ./usr
0 ./media
0 ./mnt
4.3G ./opt
0 ./srv
0 ./Users
50G .
[root@summer /]# cd opt
[root@summer opt]# ll
total 203480
drwxrwxr-x 11 summer summer 229 Jun 30 2018 kibana-6.3.1-linux-x86_64
-rw-r--r-- 1 root root 205397076 Oct 27 14:25 kibana-6.3.1-linux-x86_64.tar.gz
-rw-r--r-- 1 root root 2965388 Sep 11 15:19 mysql-connector-odbc-8.0.15-1.el7.x86_64.rpm
drwxr-xr-x 2 root root 45 Sep 27 17:56 prometheus
drwxr-xr-x. 2 root root 6 Oct 31 2018 rh
drwxr-xr-x 3 root root 28 Aug 24 18:31 tableau
[root@summer opt]# du -sh *
748M kibana-6.3.1-linux-x86_64
196M kibana-6.3.1-linux-x86_64.tar.gz
2.9M mysql-connector-odbc-8.0.15-1.el7.x86_64.rpm
8.0K prometheus
0 rh
3.4G tableau- 这里删除
[root@summer opt]# rm -rf kibana-6.3.1-linux-x86_64.tar.gz
[root@summer opt]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 63G 0 63G 0% /dev
tmpfs 63G 24K 63G 1% /dev/shm
tmpfs 63G 1.2G 62G 2% /run
tmpfs 63G 0 63G 0% /sys/fs/cgroup
/dev/mapper/centos-root 50G 50G 159M 100% /
/dev/sda2 1014M 208M 807M 21% /boot
/dev/mapper/centos-home 4.5T 188G 4.4T 5% /home
tmpfs 13G 0 13G 0% /run/user/987
tmpfs 13G 64K 13G 1% /run/user/0
overlay 50G 50G 159M 100% /var/lib/docker/overlay2/bc5fc2456c87054300bc3d0e2e619e17078de019849e1bf19fba1edcd66bc6af/merged
shm 64M 0 64M 0% /var/lib/docker/containers/e66aa9db52490a4ec4f39809c4bbf9212ede0059307e21856160515970c29be5/mounts/shm
overlay 50G 50G 159M 100% /var/lib/docker/overlay2/8f36525342c66b508369735032f3763712ef381da76a046173d718972b51fbdf/merged
overlay 50G 50G 159M 100% /var/lib/docker/overlay2/73c0bdf479c40526cdd1ab9f85ea0355fb7986ea4514e6925a2a954216f28bf0/merged
shm 64M 0 64M 0% /var/lib/docker/containers/cfe748305f892a932337df13af27b0662acc1aa2cfa112bea4b37fe3d3e16027/mounts/shm
overlay 50G 50G 159M 100% /var/lib/docker/overlay2/8a45574efb09a4740a6ea31bf8a31acd0b49e7ab738934261ebaf61623ad98d0/merged
shm 64M 0 64M 0% /var/lib/docker/containers/06c90561da84bc70c4fdb826a0f902ac3df0df19535a42f6f6052ddc92350a54/mounts/shm
shm 64M 0 64M 0% /var/lib/docker/containers/30271ff7afc6c09a368dbf42b1567650013a1b56fba7991322187976296c738e/mounts/shm# 解决方式二（扩容）
- 查看空间大小，可以看到这里的root盘满了
[root@summer]# df -TH
df: ‘/dev/shm/FlexNetFs.11111’: Transport endpoint is not connected
Filesystem Type Size Used Avail Use% Mounted on
devtmpfs devtmpfs 68G 0 68G 0% /dev
tmpfs tmpfs 68G 0 68G 0% /dev/shm
tmpfs tmpfs 68G 33M 68G 1% /run
tmpfs tmpfs 68G 0 68G 0% /sys/fs/cgroup
/dev/mapper/centos-root xfs 54G 51G 3.5G 94% /
/dev/sda2 xfs 1.1G 218M 846M 21% /boot
/dev/mapper/centos-home xfs 5.0T 270G 4.7T 6% /home
tmpfs tmpfs 14G 0 14G 0% /run/user/987
tmpfs tmpfs 14G 66k 14G 1% /run/user/0
overlay overlay 54G 51G 3.5G 94% /var/lib/docker/overlay2/bc5fc2456c87054300bc3d0e2e619e17078de019849e1bf19fba1edcd66bc6af/merged
shm tmpfs 68M 0 68M 0% /var/lib/docker/containers/e66aa9db52490a4ec4f39809c4bbf9212ede0059307e21856160515970c29be5/mounts/shm
overlay overlay 54G 51G 3.5G 94% /var/lib/docker/overlay2/8f36525342c66b508369735032f3763712ef381da76a046173d718972b51fbdf/merged
overlay overlay 54G 51G 3.5G 94% /var/lib/docker/overlay2/73c0bdf479c40526cdd1ab9f85ea0355fb7986ea4514e6925a2a954216f28bf0/merged
shm tmpfs 68M 0 68M 0% /var/lib/docker/containers/cfe748305f892a932337df13af27b0662acc1aa2cfa112bea4b37fe3d3e16027/mounts/shm
overlay overlay 54G 51G 3.5G 94% /var/lib/docker/overlay2/8a45574efb09a4740a6ea31bf8a31acd0b49e7ab738934261ebaf61623ad98d0/merged
shm tmpfs 68M 0 68M 0% /var/lib/docker/containers/30271ff7afc6c09a368dbf42b1567650013a1b56fba7991322187976296c738e/mounts/shm
shm tmpfs 68M 0 68M 0% /var/lib/docker/containers/06c90561da84bc70c4fdb826a0f902ac3df0df19535a42f6f6052ddc92350a54/mounts/shm
overlay overlay 54G 51G 3.5G 94% /var/lib/docker/overlay2/2df53c4b089d929e0ae0577921d8e1c1c002e44f20871134294c9eb1f3959092/merged
shm tmpfs 68M 0 68M 0% /var/lib/docker/containers/487243160c733e66e83c5684a15c0b2a0e7d97bafebec7d093bc2e1c556c5018/mounts/shm
overlay overlay 54G 51G 3.5G 94% /var/lib/docker/overlay2/11ff52b453e537cf63ec5e67cefd5877a95d450b02f5ac8e6633d3915df19d7e/merged
shm tmpfs 68M 0 68M 0% /var/lib/docker/containers/937b880caf9d435eba57c9b0512900a2f64c8a6ac2ce2d452a85e4c062cbc5aa/mounts/shm
[root@summer]# cd /dev/mapper/
[root@summer mapper]# dmsetup table
centos-home: 0 9640501248 linear 8:3 104859648
centos-swap: 0 8388608 linear 8:3 9745360896
centos-root: 0 104857600 linear 8:3 2048
[root@summer mapper]# echo 0 209715200 linear 8:3 2048| dmsetup load centos-root
[root@summer mapper]# dmsetup resume centos-root
[root@summer mapper]# resize2fs /dev/mapper/centos-root
resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/centos-root
Couldn't find valid filesystem superblock.
[root@summer mapper]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=3276800 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=13107200, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=6400, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 13107200 to 26214400
[root@summer mapper]# df -TH
df: ‘/dev/shm/FlexNetFs.11111’: Transport endpoint is not connected
Filesystem Type Size Used Avail Use% Mounted on
devtmpfs devtmpfs 68G 0 68G 0% /dev
tmpfs tmpfs 68G 0 68G 0% /dev/shm
tmpfs tmpfs 68G 33M 68G 1% /run
tmpfs tmpfs 68G 0 68G 0% /sys/fs/cgroup
/dev/mapper/centos-root xfs 108G 51G 58G 47% /
/dev/sda2 xfs 1.1G 218M 846M 21% /boot
/dev/mapper/centos-home xfs 5.0T 270G 4.7T 6% /home
tmpfs tmpfs 14G 0 14G 0% /run/user/987
tmpfs tmpfs 14G 66k 14G 1% /run/user/0
overlay overlay 108G 51G 58G 47% /var/lib/docker/overlay2/bc5fc2456c87054300bc3d0e2e619e17078de019849e1bf19fba1edcd66bc6af/merged
shm tmpfs 68M 0 68M 0% /var/lib/docker/containers/e66aa9db52490a4ec4f39809c4bbf9212ede0059307e21856160515970c29be5/mounts/shm
overlay overlay 108G 51G 58G 47% /var/lib/docker/overlay2/8f36525342c66b508369735032f3763712ef381da76a046173d718972b51fbdf/merged
overlay overlay 108G 51G 58G 47% /var/lib/docker/overlay2/73c0bdf479c40526cdd1ab9f85ea0355fb7986ea4514e6925a2a954216f28bf0/merged
shm tmpfs 68M 0 68M 0% /var/lib/docker/containers/cfe748305f892a932337df13af27b0662acc1aa2cfa112bea4b37fe3d3e16027/mounts/shm
overlay overlay 108G 51G 58G 47% /var/lib/docker/overlay2/8a45574efb09a4740a6ea31bf8a31acd0b49e7ab738934261ebaf61623ad98d0/merged
shm tmpfs 68M 0 68M 0% /var/lib/docker/containers/30271ff7afc6c09a368dbf42b1567650013a1b56fba7991322187976296c738e/mounts/shm
shm tmpfs 68M 0 68M 0% /var/lib/docker/containers/06c90561da84bc70c4fdb826a0f902ac3df0df19535a42f6f6052ddc92350a54/mounts/shm
overlay overlay 108G 51G 58G 47% /var/lib/docker/overlay2/2df53c4b089d929e0ae0577921d8e1c1c002e44f20871134294c9eb1f3959092/merged
shm tmpfs 68M 0 68M 0% /var/lib/docker/containers/487243160c733e66e83c5684a15c0b2a0e7d97bafebec7d093bc2e1c556c5018/mounts/shm
overlay overlay 108G 51G 58G 47% /var/lib/docker/overlay2/11ff52b453e537cf63ec5e67cefd5877a95d450b02f5ac8e6633d3915df19d7e/merged
shm tmpfs 68M 0 68M 0% /var/lib/docker/containers/937b880caf9d435eba57c9b0512900a2f64c8a6ac2ce2d452a85e4c062cbc5aa/mounts/shm
[root@summer mapper]# 本文参与 腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。
原始发表：2020-11-11，如有侵权请联系 cloudcommunity@tencent.com 删除
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