23.10.2015 19:02, Chris Bell пишет:
Hi all,
I was wondering, is there any way to create a complete
dependency/ordering map for my entire systemd system?
For starting something "systemd --test" shows all static dependencies
pulled in by startinggiven unit. For stopping something I do not think
something like this exists.
Basically, I'd
like to be able to see, relatively clearly, what targets are reached and
when,
Not sure what "when" means. systemd --test dumps jobs that will be
queued together with dependencies.
what services are wanted/required by the target, and some
That is also shown by "systemctl list-dependencies".
dependencies between services. A way to visualize the chain from
switch-root.target and default.target.
switch-root.target is challenging because when you run it after boot you
have rather different unit definitions. It may be possible to override
it using SYSTEMD_UNIT_PATH but I do not know how to emulate /run and
/etc. Also results of generators that were running in initrd are no more
available.
I know various functions exist to extract portions of the information I
need, and they can be used together to get a complete picture, but I
find it difficult to keep everything organized into something ultimately
useful. Is there a facility I'm missing? Or is this particular ability
too complex to be worth implementing?
Thanks!
--Chris
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