On Mon, Jan 15, 2018 at 3:39 PM, Boyce, Kevin P [US] (AS) < kevin.bo...@ngc.com> wrote:
> > you can't Require mysql because it's wrong when postgresql is used you > can't Require postgresql because it's wrong when mysql is used > > Why wouldn't the mysql/postgres/mariadb packager have a section as follows: > [Install] > Alias=database.service > > Then you could have other services reference the dependency on > database.service. I think this would work much like the > display-manager.service. Not everyone uses gdm, some use lightdm, kdm, > etc. I expect it work work the same way. > No, they're different. Display managers are exclusive – there's usually only one per system. But the same system could easily run several different databases at once – MySQL, Postgres, Firebird do not conflict with each other. So an alias would prohibit that. If a program has selectable database backends, I would say it's up to the sysadmin to define dependencies as well. `systemctl add-requires my-app.service mysql.service` would do the job. Or the app could ship a "generator" (similar to the existing fstab-generator, nfs-generator, openvpn-generator...) which adds those dependencies dynamically. -- Mantas Mikulėnas
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