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From Achim Nierbeck <bcanh...@googlemail.com>
Subject Re: felix.fileinstall.enableConfigSave = false ignored?
Date Sat, 05 Nov 2016 12:20:26 GMT
Hi,




> > Configuration Admin service does have an internal storage, that one is
> the ConfigRepository
>
> CM is from Felix, CR from Karaf - and it does not implement any interface
> from Felix. So how does CR become an internal storage of Felix CM?
>
> > I doubt you can make this one read-only as it's internal
>
> I don’t want to make this read-only, I tried to use felix.cm.dir to point
> CM to a writable directory.
>

if you don't change anything on this property, it's the default bundle
cache directory.


>
> > Make etc folder read-only that is possible
>
> How? I so far cannot see a possibility as CR seems to always write new
> configs in there.
>
>
Only as, JB already noted, if the configuration does contain a flag for
"persisting" the configuraiton. This is a combination of FelixFileInstall
with ConfigAdmin service.


> > Use a different folder then $KARAF_HOME/etc
>
> This seems to be the only possible workaround for me right now, but I
> actually wanted to avoid poving the Karaf *.properties files as well to a
> writable folder and rather wanted to keep it „internal“ to my Karaf
> distribution (so that users do not even think about touching them).
>
>
I've got to correct myself it's the KARAF_ETC property (
http://karaf.apache.org/manual/latest/#_files)
If you want to keep your own configuration separate and "not-persistent to
Disk", use the <config> - part of a feature to
define the configuration. As long as no configuration file is "attached" to
that configuration it'll never be persisted to the etc folder.


> Regards,
> Kai
>
> > On 5 Nov 2016, at 12:12, Achim Nierbeck [via Karaf] <
> ml-node+s922171n4048578h18@n3.nabble.com> wrote:
> >
> > Hi Kai,
> >
> > just re-read your first question.
> > I'm not sure if I got all questions right so let me try to explain what
> I got :)
> >
> > 1) Configuration Admin service does have an internal storage, that one
> is the ConfigRepository, I doubt you can make this one read-only as it's
> internal
> > 2) File-Install and CA are connected only by the property JB gave the
> description to, but the FileInstall part isn't part of ConfigRepository
> > 3) Make etc folder read-only that is possible
> > 4) have different etc folders, that is possible, part of FileInstall
> configuration.
> > 5) Use sub-folders of etc for your own configs, possible.
> > 6) Use a different folder then $KARAF_HOME/etc, it's possible just need
> to configure it via the start script or set-env.sh
> >
> >
> > regards, Achim
> >
> >
> >
> > 2016-11-05 11:29 GMT+01:00 Kai Kreuzer <[hidden email]
> <x-msg://62/user/SendEmail.jtp?type=node&node=4048578&i=0>>:
> > How, can you elaborate on this? My goal is to have etc read-only
> (obviously including its sub-folders) and karaf.etc is currently hard-coded
> as the folder to store the configs.
> >
> > Cheers,
> > Kai
> >
> > > On 5 Nov 2016, at 11:09, Achim Nierbeck [via Karaf] <[hidden email]
> <x-msg://62/user/SendEmail.jtp?type=node&node=4048578&i=1>> wrote:
> > >
> > > You can use subfolders for a deportation of concern.
> > >
> > > Regards, Achim
> > >
> > > Am Samstag, 5. November 2016 schrieb Kai Kreuzer :
> > > Hi JB,
> > >
> > > Thanks for the insights.
> > >
> > > I think what is not yet clear to me is how the ConfigRepository and
> the Felix ConfigurationAdmin interoperate.
> > > If I am not mistaken, Karaf uses the Felix ConfigurationAdmin
> implementation. From the docs of Felix CM, I see that it persists the
> configurations (i.e. does NOT only hold it in memory) and its location can
> be configured by the felix.cm.dir property. Is this whole mechanism
> disabled in Karaf and the ConfigRepository actually intercepts those calls?
> > >
> > > > I propose to introduce a user property to let you define the storage
> location or disable it.
> > >
> > >
> > > I think this would solve my issue - it would enable users to use
> different folders for reading configs through fileinstall and managing the
> overall ConfigAdmin settings in a different place.
> > >
> > > Probably it would suffice to not hardcode
> System.getProperty("karaf.etc“) in ConfigRepository, but come up with a
> new property here, right?
> > >
> > > Cheers,
> > > Kai
> > >
> > > > On 5 Nov 2016, at 10:30, jbonofre [via Karaf] <<a
> href="javascript:;" onclick="_e(event, &#39;cvml&#39;, &#[hidden email]
> <x-msg://62/user/SendEmail.jtp?type=node&node=4048578&i=2> <mailto:[hidden
> email] <x-msg://62/user/SendEmail.jtp?type=node&node=4048578&i=
> 3>>&#39;)">ml-node+s922171n4048573h63@...> wrote:
> > > >
> > > > Hi,
> > > >
> > > > let me explain a bit.
> > > >
> > > > When you create a config using ConfigAdmin (using the ConfigAdmin
> > > > service), it doesn't create a file (it's in "memory"). In that
> > > > situation, if any change is not persisted to a cfg file.
> > > > On the other hand, if you create a cfg file in Karaf etc folder, then
> > > > the corresponding ConfigAdmin configuration is created and
> implicitely
> > > > add a felix.fileinstall.filename property. Then, any change to the
> > > > configuration is flush back to the cfg file.
> > > >
> > > > So, in Karaf, you have a feature that automatically create the
> > > > corresponding cfg file when you create a configuration. And after
> that,
> > > > we are on the "normal" behavior.
> > > >
> > > > The Karaf documentation is correct: when you have the
> > > > felix.fileinstall.filename property in a ConfigAdmin configuration,
> if
> > > > the enableConfigSave is true, it's flush back to cfg file, false
> doesn't.
> > > >
> > > > The difference is when the configuration is create and without the
> > > > fileinstall.file property.
> > > > In the case, you may want to disable the "auto-create" cfg file done
> by
> > > > Karaf (ConfigRepository).
> > > > The ConfigRepository is create (in the config feature) like this:
> > > >
> > > > ConfigRepository configRepository = new
> > > > ConfigRepositoryImpl(configurationAdmin, new
> > > > File(System.getProperty("karaf.etc")));
> > > >
> > > > The File is the storage, if null, Karaf doesn't do any storage.
> > > >
> > > > I propose to introduce a user property to let you define the storage
> > > > location or disable it.
> > > >
> > > > Regards
> > > > JB
> > > >
> > > >
> > > > On 11/04/2016 08:29 PM, Kai Kreuzer wrote:
> > > >
> > > > > Hi,
> > > > >
> > > > > I just came across the same issue. I would like to treat the etc
> folder as
> > > > > read-only and thus prevent Karaf from doing changes to it.
> Nonetheless, I
> > > > > want to keep fileinstall to read configs from etc and push them to
> > > > > ConfigAdmin.
> > > > >
> > > > > I would have expected this to work by merely setting
> > > > > "felix.fileinstall.enableConfigSave = false" - this is what the
> Karaf (not
> > > > > fileinstall!) documentation <https://karaf.apache.org/
> manual/latest/#_files <https://karaf.apache.org/manual/latest/#_files> <
> https://karaf.apache.org/manual/latest/#_files <https://karaf.apache.org/
> manual/latest/#_files>> <https://karaf.apache.org/manual/latest/#_files <
> https://karaf.apache.org/manual/latest/#_files> <https://karaf.apache.org/
> manual/latest/#_files <https://karaf.apache.org/manual/latest/#_files>>>>
> > > > > suggests.
> > > > >
> > > > > So what can I do to achieve my goal? What does it mean to "use a
> null
> > > > > Storage"? What consequences does that have?
> > > > >
> > > > > I hope you can help!
> > > > >
> > > > > Thanks,
> > > > > Kai
> > > > >
> > > > >
> > > > >
> > > > > --
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Apache Member
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