[LINUX] It takes a long time to shut down in CentOS 7 with LVM configuration.

Introduction

An event that takes a long time to shut down occurs in CentOS7. Run shutdown -h now to After transitioning to a black screen, it stagnates for about 90 seconds with a black screen, and then stops.

When I pressed ʻESC` on a black screen, I could see the following message.

A stop job is running for LVM2 metadata daemon

Searching for the message, it seems to be an LVM bug that occurs at shutdown.

Disable lvmetad

It seems to be fixed with 2.02.187, but as of 2020/02/24, for CentOS 7 The lvm2 package seemed to be the latest in 2.02.185, so disable lvmetad deal with. You can disable lvmetad by modifying /etc/lvm/lvm.conf as follows:

`"Change before"`


        use_lvmetad = 0

`"After change"`


        use_lvmetad = 1

Shut down the OS again, and if it goes down smoothly, the countermeasure is completed.

reference

sourceware.org - lvm2.git / commitdiff Red Hat-Metadata Demon (LVMETAD)

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