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NEWS: adjust MONITOR_ env vars paragraph

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This actually never shipped in a release, so it's not a backward-incompatible
change. Move it down and reword it.
This commit is contained in:
Luca Boccassi 2022-03-22 23:03:23 +00:00
parent 00b29ca143
commit a8c122c4cb
1 changed files with 7 additions and 8 deletions
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NEWS
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@ -23,14 +23,6 @@ CHANGES WITH 251 in spe:
and backward compatibility broken instead on the assumption that
nobody can be affected given the current state of this interface.
* Service monitor environment variables will only be passed to
OnFailure=/OnSuccess= handlers if exactly one unit lists the handler
unit as OnFailure=/OnSuccess=. In addition, $MONITOR_METADATA is no
longer used, and instead separate variables are set:
$MONITOR_SERVICE_RESULT, $MONITOR_EXIT_CODE, $MONITOR_EXIT_STATUS,
$MONITOR_INVOCATION_ID and $MONITOR_UNIT. For cases when a single
handler needs to watch multiple units, use a templated handler.
* All kernels supported by systemd mix RDRAND (or similar) into the
entropy pool at early boot. This means that on those systems, even if
/dev/urandom is not yet initialized, it still returns bytes that that
@ -174,6 +166,13 @@ CHANGES WITH 251 in spe:
they were installed earlier or later than the appropriate version of
the library.
* A new set of service monitor environment variables will be passed to
OnFailure=/OnSuccess= handlers, but only if exactly one unit lists the
handler unit as OnFailure=/OnSuccess=. The variables are:
$MONITOR_SERVICE_RESULT, $MONITOR_EXIT_CODE, $MONITOR_EXIT_STATUS,
$MONITOR_INVOCATION_ID and $MONITOR_UNIT. For cases when a single
handler needs to watch multiple units, use a templated handler.
* A new ExtensionDirectories= setting allows system extensions to be
loaded from a directory. (It is similar to ExtensionImages=, but
takes a path to a directory, instead of an image.)