Daniel Black
c53d2d54bd
KillMode=mixed and control group are used to indicate that all process should be killed off. SendSIGKILL is used for services that require a clean shutdown. These are typically database service where a SigKilled process would result in a lengthy recovery and who's shutdown or startup time is quite variable (so Timeout settings aren't of use). Here we take these two factors and refuse to start a service if there are existing processes within a control group. Databases, while generally having some protection against multiple instances running, lets not stress the rigor of these. Also ExecStartPre parts of the service aren't as rigoriously written to protect against against multiple use. closes #8630
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