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Nested KVM is very flaky as we learnt from our CI. Hence, let's avoid KVM whenever we detect we are already running inside of KVM. Maybe one day nested KVM is fixed, at which point we can turn this on again, but for now let's simply avoid nested KVM, since reliable CI is more important than quick CI, I guess. And yes, avoiding KVM for our qemu runs does make things substantially slower, but I think it's not a complete loss. Inspired by @evverx' findings in: https://github.com/systemd/systemd/pull/8701#issuecomment-380213302
The extended testsuite only works with uid=0. It contains of several subdirectories named "test/TEST-??-*", which are run one by one. To run the extended testsuite do the following: $ make all # Avoid the "sudo make" below building anything as root $ cd test $ sudo make clean check ... make[1]: Entering directory `/mnt/data/harald/git/systemd/test/TEST-01-BASIC' Making all in . Making all in po TEST: Basic systemd setup [OK] make[1]: Leaving directory `/mnt/data/harald/git/systemd/test/TEST-01-BASIC' ... If one of the tests fails, then $subdir/test.log contains the log file of the test. To debug a special testcase of the testsuite do: $ make all $ cd test/TEST-01-BASIC $ sudo make clean setup run QEMU ==== If you want to log in the testsuite virtual machine, you can specify additional kernel command line parameter with $KERNEL_APPEND. $ sudo make KERNEL_APPEND="systemd.unit=multi-user.target" clean setup run you can even skip the "clean" and "setup" if you want to run the machine again. $ sudo make KERNEL_APPEND="systemd.unit=multi-user.target" run You can specify a different kernel and initramfs with $KERNEL_BIN and $INITRD. (Fedora's or Debian's default kernel path and initramfs are used by default) $ sudo make KERNEL_BIN=/boot/vmlinuz-foo INITRD=/boot/initramfs-bar clean check A script will try to find your QEMU binary. If you want to specify a different one you can use $QEMU_BIN. $ sudo make QEMU_BIN=/path/to/qemu/qemu-kvm clean check