Bug 54659

Summary:	RFE: Extend logic for stopping units (As for OnFailure) [ w/ patch ]
Product:	systemd	Reporter:	Oleksii Shevchuk <public.avatar>
Component:	general	Assignee:	systemd-bugs
Status:	RESOLVED WONTFIX	QA Contact:	systemd-bugs
Severity:	enhancement
Priority:	medium	CC:	alexandre, radek
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	Add OnStop to [Unit] Add OnStopRestoreConflicts

Description Oleksii Shevchuk 2012-09-08 05:13:14 UTC

In some cases, starting or stopping of some service requires starting/restarting other. One example - you have some service A that replaces service B with Conflicts= rule, and then B stopped

Comment 1 Oleksii Shevchuk 2012-11-02 19:50:17 UTC

Created attachment 69457 [details] [review]
Add OnStop to [Unit]

+ Add OnStop event // at job stop/done

Comment 2 Oleksii Shevchuk 2012-11-03 17:19:45 UTC

Created attachment 69493 [details] [review]
Add OnStopRestoreConflicts

Extends previous patch. Add optional support for restoring stopped by conflict  resolution deps, on successful stop conflicing unit. (Oh.) 


i.e.

user > cat dep1.target
[Unit]
Description=dep1
OnStopRestoreConflicts=yes

user > cat dep2.target
[Unit]
Description=dep2
Conflicts=dep1.target

start dep2.target
// dep2 started
start dep1.target
// dep1 started
// dep2 stopped
// dep2 added to dep1 OnStopRestoreConflicts deps
stop dep1.target
// dep1 stopped
// dep2 started
// dep2 removed from dep1 OnStopRestoreConflicts deps

Comment 3 Lennart Poettering 2016-06-07 10:35:27 UTC

I am not convinced adding this would be a good idea, as this would make systemd Turing complete, and I am pretty sure we really shouldn't be.

I hope that makes sense?

Closing hence. Sorry.

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