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Since August 2020, GitLab Continuous Integration test jobs have been failing on the CentOS 7 image like this from tests/test_SupportedFileSystems.log: process 6319: D-Bus library appears to be incorrectly set up; failed to read machine uuid: UUID file '/etc/machine-id' should contain a hex string of length 32, not length 0, with no other text See the manual page for dbus-uuidgen to correct this issue. D-Bus not built with -rdynamic so unable to print a backtrace Running main() from test_SupportedFileSystems.cc DISPLAY=":99" /usr/bin/xvfb-run: line 181: 6319 Aborted (core dumped) DISPLAY=:$SERVERNUM XAUTHORITY=$AUTHFILE "$@" 2>&1 Not sure why this has just started failing in the CentOS 7 CI image now, but the error is widely known [1][2][3][4]. Use systemd-machine-id-setup to generate a machine ID [5][6]; rather than dbus-uuidgen [7] as it's designed to integrate into VMs and does the right thing if a valid machine ID already exists. [1] Red Hat Bug 598200 - D-Bus library appears to be incorrectly set up; failed to read machine uuid: UUID file '/var/lib/dbus/machine-id' https://bugzilla.redhat.com/show_bug.cgi?id=598200 [2] Free Desktop Bug 13194 - When machine-id not found, dbus should not abort https://bugs.freedesktop.org/show_bug.cgi?id=13194 [3] D-Bus library appears to be incorrectly set up https://unix.stackexchange.com/questions/117741/d-bus-library-appears-to-be-incorrectly-set-up [4] Generate uuid for container https://xpra.org/trac/wiki/Usage/Docker/CentOS [5] CentOS / RHEL 7 : How to Change the machine-id https://www.thegeekdiary.com/centos-rhel-7-how-to-change-the-machine-id/ [6] man systemd-machine-id-setup https://man7.org/linux/man-pages/man1/systemd-machine-id-setup.1.html [7] man dbus-uuidgen https://dbus.freedesktop.org/doc/dbus-uuidgen.1.html Closes !62 - Fix CentOS 7 CI test job failures because of zero sized /etc/machine-id
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