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

Solution Verified - 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

  • RHEL7: after restarting dbus.service unit or dbus.service unit crashed, logins take 25 seconds to occur

  • RHEL7: after restarting dbus.service unit or dbus.service unit crashed, the Teaming network interfaces handled by NetworkManager stopped working

  • RHEL9 and RHEL10: after restarting dbus.service unit or dbus.service unit crashed, logins take 120 seconds to occur

Environment

  • Red Hat Enterprise Linux 7 (RHEL7)

    • system services (including NetworkManager, tuned and sshd)

  • Red Hat Enterprise Linux 8 (RHEL8)

    • firewalld

  • Red Hat Enterprise Linux 9 and 10 (RHEL9 and RHEL10)

    • systemd-logind
    • firewalld

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