RHEL7: How to configure the system to let system services depending on D-Bus restart automatically upon `dbus.service` unit failure

Solution Unverified - Updated -

Issue

  • For some reason, dbus.service unit fails on my system from time to time, causing other services failure to happen, I want to protect the other services from failing as well

  • After restarting dbus.service unit or dbus.service unit crashed, logins take 25 seconds to occur

  • After restarting dbus.service unit or dbus.service unit crashed, the Teaming network interfaces handled by NetworkManager stopped working

Environment

  • Red Hat Enterprise Linux 7
    • dbus
    • system services (including NetworkManager, tuned and sshd)

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