用df命令查看發現磁盤空間幾乎被佔滿了
[root@172-16-101-253 ~]# df -hl
文件系統 容量 已用 可用 已用% 掛載點
/dev/mapper/centos-root 36G 35G 789M 98% /
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 41M 7.8G 1% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/vda1 1014M 142M 873M 14% /boot
/dev/sda1 296G 5.6G 275G 2% /data
tmpfs 1.6G 0 1.6G 0% /run/user/0
tmpfs 1.6G 0 1.6G 0% /run/user/1000
清理了一些文件之後用du命令查詢，發現與df命令結果不一致，df查詢根目錄被佔用35G，但du查詢根目錄被佔用15G
[root@172-16-101-253 app]# du -h / --max-depth=1
110M /boot
0 /dev
du: 無法訪問"/proc/29830": 沒有那個文件或目錄
du: 無法訪問"/proc/29846": 沒有那個文件或目錄
du: 無法訪問"/proc/29847/task/29847/fd/4": 沒有那個文件或目錄
du: 無法訪問"/proc/29847/task/29847/fdinfo/4": 沒有那個文件或目錄
du: 無法訪問"/proc/29847/fd/3": 沒有那個文件或目錄
du: 無法訪問"/proc/29847/fdinfo/3": 沒有那個文件或目錄
0 /proc
41M /run
0 /sys
30M /etc
64K /root
177M /var
288K /tmp
1.5G /usr
5.6G /home
0 /media
0 /mnt
1.9G /opt
0 /srv
5.5G /data
15G /
用df -i查詢inode利用率，inode不夠用也會有這個問題，但是inode也是夠用的
[root@172-16-101-253 app]# df -i
文件系統 Inode 已用(I) 可用(I) 已用(I)% 掛載點
/dev/mapper/centos-root 1064648 43871 1020777 5% /
devtmpfs 2030258 441 2029817 1% /dev
tmpfs 2033299 1 2033298 1% /dev/shm
tmpfs 2033299 641 2032658 1% /run
tmpfs 2033299 16 2033283 1% /sys/fs/cgroup
/dev/vda1 524288 327 523961 1% /boot
/dev/sda1 19660800 106003 19554797 1% /data
tmpfs 2033299 1 2033298 1% /run/user/0
tmpfs 2033299 1 2033298 1% /run/user/1000
用lsof |grep delete檢查是否存在已刪除的文件被佔用的情況
[root@172-16-101-253 app]# lsof |grep delete
tuned 962 root 7u REG 253,0 4096 33565759 /tmp/ffiQAZuAc (deleted)
gmain 962 2634 root 7u REG 253,0 4096 33565759 /tmp/ffiQAZuAc (deleted)
tuned 962 2635 root 7u REG 253,0 4096 33565759 /tmp/ffiQAZuAc (deleted)
tuned 962 2636 root 7u REG 253,0 4096 33565759 /tmp/ffiQAZuAc (deleted)
tuned 962 2674 root 7u REG 253,0 4096 33565759 /tmp/ffiQAZuAc (deleted)
java 15408 admin 1w REG 253,0 27188723880 5232071 /home/admin/app/dt-center-task/logs/rdos_task.stdout (deleted)
java 15408 admin 2w REG 253,0 15722 5232072 /home/admin/app/dt-center-task/logs/rdos_task.err (deleted)
java 15408 admin 3w REG 253,0 16895030 5232069 /home/admin/app/dt-center-task/logs/vertx.gc (deleted)
java 15408 admin 8w REG 253,0 3535802 1651950 /home/admin/app/dt-center-task/logs/task_server.log (deleted)
java 15408 admin 9w REG 253,0 564784 5232076 /home/admin/app/dt-center-task/logs/task_master.log (deleted)
java 15408 admin 10w REG 253,0 8224694 5232075 /home/admin/app/dt-center-task/logs/task_executor.log (deleted)
java 15408 5439 admin 1w REG 253,0 27188718604 5232071 /home/admin/app/dt-center-task/logs/rdos_task.stdout (deleted)
java 15408 5439 admin 2w REG 253,0 15722 5232072 /home/admin/app/dt-center-task/logs/rdos_task.err (deleted)
java 15408 5439 admin 3w REG 253,0 16895030 5232069 /home/admin/app/dt-center-task/logs/vertx.gc (deleted)
java 15408 5439 admin 8w REG 253,0 3535802 1651950 /home/admin/app/dt-center-task/logs/task_server.log (deleted)
java 15408 5439 admin 9w REG 253,0 564784 5232076 /home/admin/app/dt-center-task/logs/task_master.log (deleted)
java 15408 5439 admin 10w REG 253,0 8224694 5232075 /home/admin/app/dt-center-task/logs/task_executor.log (deleted)
java 15408 10986 admin 1w REG 253,0 27188718604 5232071 /home/admin/app/dt-center-task/logs/rdos_task.stdout (deleted)
java 15408 10986 admin 2w REG 253,0 15722 5232072 /home/admin/app/dt-center-task/logs/rdos_task.err (deleted)
java 15408 10986 admin 3w REG 253,0 16895030 5232069 /home/admin/app/dt-center-task/logs/vertx.gc (deleted)
此處省略N行
檢查後發現刪除的日誌文件仍然處於被佔用的狀態，此時只需kill對應的進程