DaanHoogland commented on issue #3954: Cloudstack Management Improper shutdown 
- causes mgmt to not start after reboot of server
URL: https://github.com/apache/cloudstack/issues/3954#issuecomment-599593507
 
 
   @rvalle @rhtyd @andrijapanicsb I've read up on systemd a bit;
   
   1. `If unit1 has the directive After=unit2, then if both units are run, 
unit2 will be executed fully before unit1 starts.`
   
   1. `If unit1 has Wants=unit2 as a dependency, when unit1 is run, unit2 will 
be run as well. But whether unit2 starts successfully does not affect unit1 
running successfully.`
   
   I think we can leverage the two to make sure that if mysql is installed on 
the same server it will be properly schedule to start before and shutdown after 
cloudstack.

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