How to control and setup service?

[Pavel Timofeev]

2015-08-29 12:49 GMT+03:00 Stefan Esser <se at freebsd.org>:
> Am 28.08.2015 um 18:51 schrieb Pavel Timofeev:
>> Sorry for top posting! It's pretty hard to write email walking under
>> heavy rain and umbrella.
>> So, I talked about special key, not default behaviour.
>> Let me give you an example.
>> You got a server (or ten) which was/were somehow configured before you.
>> You want to reconfigure it/them. You don't care how and where it's
>> already configured, you just want to set particular rcvars and be sure
>> that no other rcvars are set.
>>
>> Before you came it was:
>> mysql_enable="YES/NO" # no matter
>> mysql_datadir="/mycozystorage/db/mysql"
>> mysql_defaults_extra_file="/mycozystorage/mysql/my.cnf"
>> mysql_plugin_dir="/somewhere/lib/mysql/plugin"
>> mysql_log_error="/mycozystorage/db/mysql/hostname.err"
>>
>> then you run something like (look at -k key)
>> # service -k mysql-server enable set datadir "/mysqldb" log_error
>> "/mysqllogs/hostname.err"
>> it becomes
>> mysql_enable="YES"
>> mysql_datadir="/mysqldb"
>> mysql_log_error="/mysqllogs/hostname.err"
>>
>> I. e. sets what requested and deletes rcvars which was not requested.
>
> I think that the removal of the previous config state should not come
> as the side-effect of some "set" command.
>
> I'd rather introduce a now verb for this purpose, which has the effect
> of clearing all previous settings for a service, instead of overloading
> the "set" operation.

BTW, it's already suggested here https://reviews.freebsd.org/D451
it's rcdelete. Not sure if it's good name.

>
> E.g.:
>
> # service mysql-server clearconfig
>
> Not sure about the best command name to use, it could also be "clean"
> or "initconfig" or "defaultconfig". The semantics is that all the
> rc.conf assignments for thise service are removed (including the
> enable line) and the defaults from defaults/rc.conf become effective
> again.
>
> Regards, STefan