[1.0] libct/cg/sd/v1: fix freezeBeforeSet (alt 2) #3167
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Draft until #3166 is merged. |
This fixes the behavior intended to avoid freezing containers/control groups without it being necessary. This is important for end users of libcontainer who rely on the behavior of no freeze. The previous implementation would always get error trying to get DevicePolicy from the Unit via dbus, since the Unit interface doesn't contain DevicePolicy. Signed-off-by: Odin Ugedal <odin@uged.al> (cherry picked from commit 4104367) Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Add a test for freezeBeforeSet, checking various scenarios including those that were failing before the fix in the previous commit. [v2: add more cases, add a check before creating a unit.] Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com> (cherry picked from commit fec49f2) Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This is helpful to kubernetes in cases it knows for sure that the freeze is not required (since it created the systemd unit with no device restrictions). As the code is trivial, no tests are required. Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com> (cherry picked from commit 9a095e4) Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
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#3166 is merged; this is no longer a draft |
mrunalp
approved these changes
Aug 19, 2021
AkihiroSuda
approved these changes
Aug 20, 2021
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A backport of #3166 to 1.0 branch. Original description follows.
This is a combo of #3143,
#3151,and #3161, which aims to be both fast and correct for all use cases.From #3143 -- fixes to getting and checking device properties;
From #3151 -- fast(er) path in freezeBeforeSet (in case devices.list is empty we can skip getting unit properties);From #3161 -- SkipFreezeOnSet knob for kubernetes.
From #3148 -- test cases (those are also cherry-picked in #3143)
Aimed to fix kubernetes/kubernetes#104280 (once we backport, release 1.0.2, and vendor it to kubernetes)