[systemd-devel] question about Wants and unit start-up order

[Mantas Mikulėnas]

On Fri, Mar 23, 2018 at 5:41 PM, Brian J. Murrell <brian at interlinx.bc.ca>
wrote:

> If I have:
>
> Wants=system.slice nss-lookup.target named-setup-rndc.service
>
> in named-pkcs11.service, so shouldn't mean that named-pkcs11.service
> will be started up before the nss-lookup.target is Reached/Started?
>

No, dependencies do not imply any specific ordering. (The only exception is
when a .target wants/requires another unit.)

In other words, you will need to additionally list the same units in
After=, or in certain cases in Before=. (For example, named is a nss-lookup
provider, so it should have "Before=nss-lookup.target", but
"After=named-setup-mdc.service".)

On another note, Wants=system.slice is *very* redundant – all system
services go into that slice anyway.

-- 
Mantas Mikulėnas
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