How to control and setup service?

[Allan Jude]

On 2015-08-29 05:49, Stefan Esser wrote:
> 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.
> 
> 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
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> 

I agree that that is a better design, as I would almost never actually
want to remove those extra settings, and if it happened unexpectedly, I
would be quite upset.

-- 
Allan Jude

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