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units: document why systemd-time-wait-sync.service conditions on CAP_SYS_TIME (#8555)

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As requested by @evverx in https://github.com/systemd/systemd/pull/8537#issuecomment-375122615
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Lennart Poettering 2018-03-22 21:41:54 +01:00 committed by Evgeny Vereshchagin
parent 1147eef0b6
commit c5beecca19
1 changed files with 9 additions and 0 deletions
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units/systemd-time-wait-sync.service.in
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@ -10,8 +10,17 @@
[Unit] [Unit]
Description=Wait Until Kernel Time Synchronized Description=Wait Until Kernel Time Synchronized
Documentation=man:systemd-time-wait-sync.service(8) Documentation=man:systemd-time-wait-sync.service(8)
# Note that this tool doesn't need CAP_SYS_TIME itself, but it's primary
# usecase is to run in conjunction with a local NTP service such as
# systemd-timesyncd.service, which is conditioned this way. There might be
# niche usecases where running this service independently is desired, but let's
# make this all "just work" for the general case, and leave it to local
# modifications to make it work in the remaining cases.
ConditionCapability=CAP_SYS_TIME ConditionCapability=CAP_SYS_TIME
ConditionVirtualization=!container ConditionVirtualization=!container
DefaultDependencies=no DefaultDependencies=no
Before=time-sync.target shutdown.target Before=time-sync.target shutdown.target
Wants=time-sync.target Wants=time-sync.target