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I want to know ,does systemd-logind must be running in docker container ? My container's systemd-logind always eat CPU 100% and what's systemd-logind's effect?

If I stop docker container's systemd-logind for ever,Will there be other influences?

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It really depends on the linux distribution you use as Docker template, but it doesn't explain the 100%.

Systemd-logind should not use that much cpu as it's job is :

https://www.freedesktop.org/software/systemd/man/systemd-logind.service.html

systemd-logind is a system service that manages user logins. It is responsible for:

Keeping track of users and sessions, their processes and their idle state. This is implemented by allocating a systemd slice unit for each user below user.slice, and a scope unit below it for each concurrent session of a user. Also, a per-user service manager is started as system service instance of user@.service for each user logged in.

Generating and managing session IDs. If auditing is available and an audit session ID is set for a session already, the session ID is initialized from it. Otherwise, an independent session counter is used.

Providing PolicyKit-based access for users to operations such as system shutdown or sleep

Implementing a shutdown/sleep inhibition logic for applications

Handling of power/sleep hardware keys

Multi-seat management

Session switch management

Device access management for users

Automatic spawning of text logins (gettys) on virtual console activation and user runtime directory management

I suppose there is something wrong with your docker template.

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