Shulou(Shulou.com)06/01 Report--

Operating system information:

# cat / etc/redhat-release Red Hat Enterprise Linux Server release 7.5 (Maipo)

Runcluvfy check results:

Starting check for / dev/shm mounted as temporary file system... ERROR: PRVE-0426: The size of in-memory file system mounted as / dev/shm is "1000" megabytes which is less than the required size of "2048" megabytes on node "PRVE-0426: The size of in-memory file system mounted as / dev/shm is" 995 "megabytes which is less than the required size of" 2048 "megabytes on node"Check for / dev/shm mounted as temporary file system failed"

Current configuration:

[root@prodb1] # df-h

Filesystem Size Used Avail Use% Mounted ondevtmpfs 975M 0975M 0% / devtmpfs 995M 0995m 0% / dev/shmtmpfs 995M 8.7m 986m 1% / runtmpfs 995M 0995m 0% / sys/fs/cgroup/dev/mapper/ol-root 22G 3.9G 19G 18% / / dev/sda1 1014M 158m 857m 16% / boottmpfs 199m 0 199m 0% / run/user/0tmpfs 199m 0 199M 0 0% / run/user/1002

The current shm size is 995m.

Check fstab

[root@prodb1 ~] # cat / etc/fstab

# / etc/fstab# Created by anaconda on Wed Jan 30 13:44:53 2019 years # Accessible filesystems, by reference, are maintained under'/ dev/disk'# See man pages fstab (5), findfs (8) Mount (8) and/or blkid (8) for more info#/dev/mapper/ol-root / xfs defaults 0 0UUID=266095fc-dca4-4fce-a808-a10628d642d3 / boot xfs defaults 0 0/dev/mapper/ol-swap defaults 0 0

Fstab does not have the configuration of shm, and the configuration information is written to the following file:

# ll / usr/lib/dracut/modules.d/99base/init.sh-rwxr-xr-x. 1 root root 11467 April 11 2018 / usr/lib/dracut/modules.d/99base/init.sh 62 if! Ismounted / dev/shm; then 63 mkdir-m 0755 / dev/shm 64 mount-t tmpfs-o mode=1777,nosuid,nodev,strictatime tmpfs / dev/shm > / dev/null 65 fi

Modify 64 lines to ensure that the next restart is still valid:

Mount-t tmpfs-o mode=1777,nosuid,nodev,strictatime,size=2G tmpfs / dev/shm > / dev/null

Modify the current settings:

# fsuser-km / dev/shm#umount / dev/shm#mount-t tmpfs-o mode=1777,nosuid,nodev,strictatime,size=2G tmpfs / dev/shm

Reference: Linux OL7/RHEL7: PRVE-0421: No entry exists in / etc/fstab for mounting / dev/shm (document ID 2065603.1)

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