KERNEL_APPEND="systemd.unit=multi-user.target" is not very useful, because the
machine will still shut down as soon as the tests succeeds or fails. But
INTERACTIVE_DEBUG=1 works great, so let's simplify the instructions and
recommend that.
In most cases we refernced the concept as "initrd". Let's convert most
remaining uses of "initramfs" to "initrd" too, to stay internally
consistent.
This leaves "initramfs" only where it's relevant to explain historical
concepts or where "initramfs" is part of the API (i.e. in
/run/initramfs).
Follow-up for: b66a6e1a58
We used both "qemu" and "QEMU", let's use the lower-case version everywhere
since it's also the name of the binary and the version that people are
most familiar with.
The stuff under test/ is not only for the integeration tests, but also
for various other test-related stuff, so adjust the docs a bit.
Every time I need it I have to first relearn autopkgtest and find where
all the necessary stuff lives, so let's document it somewhere close to
systemd for (at least) future me.
The $BUILD_DIR is only used in test-functions, and doesn't need to
be specified in any other scripts. Additionally, to be able to allow
the integration test suite to be run against locally installed binaries,
instead of built binaries, moving BUILD_DIR logic completely into
test-functions allows later patches to be simpler.
By default the test suite prefers qemu, and uses nspawn only if
a test specifically says it doesn't support qemu.
Add a variable to allow flipping the default, and run as many
tests under nspawn as possible.
Allows to split the test run in two parts. Most tests can run under
nspawn which is much faster, and they can be ran in one chunk with
TEST_NO_QEMU=1. The qemu-only tests, which are just a handful, can
be ran in another chunk with TEST_QEMU_ONLY=1.
Allows autopkgtest to be split in two parts.
It tries to find a suitable QEMU binary and will use KVM if present.
We can now configure QEMU from outside with 4 variables :
- $QEMU_BIN : path to QEMU's binary
- $KERNEL_APPEND : arguments appended to kernel cmdline
- $KERNEL_BIN : path to a kernel
Default /boot/vmlinuz-$KERNEL_VER
- $INITRD : path to an initramfs
Default /boot/initramfs-${KERNEL_VER}.img
- $QEMU_SMP : number of CPU simulated by QEMU.
Default 1
(from Alexander Graf's script: http://www.spinics.net/lists/kvm/msg72389.html)
- fix typo
- use compiled systemd-nspawn
- drop --capability=... from systemd-nspawn invocation, is is the default now
- simplify sudo make invocations
