Hi Greg,

> Taras, are you interested in dynamic SSL reconfiguration in Connect?
> Would you be willing to investigate the details of that for the KIP?
I would prefer to separate this functionality into the next KIP. But
if you / (the community) consider it necessary to combine this in one
KIP/patch, then I’m ready to do it.

The entry point for dynamic reconfiguration for Connect is not clear for me.
For a broker it is the DynamicConfig functionality. Should we add a
REST endpoint to reconfigure Connect or use another way?

--
With best regards,
Taras Ledkov

On Tue, Dec 5, 2023 at 2:42 AM Greg Harris <greg.har...@aiven.io.invalid> wrote:
>
> Hi Chris,
>
> Thank you for your comments above. I disagree with your recommendation
> for a new SslEngineFactory variant/hierarchy.
>
> 1. A superinterface could be more confusing to users. Since this is an
> interface in `clients`, the connect-specific interface would also need
> to be in clients, despite being superfluous for clients users and
> broker developers.
> 2. A user could implement the reduced interface, and then have issues
> loading their implementation in a broker, and need to find
> documentation/javadocs to explain to them why.
> 3. This interface has been in use since 2020, so I don't believe that
> the burden of implementing these methods has been excessive. I assume
> there's at least one "static" implementation out there that would have
> benefitted from the proposed super-interface, but they managed to
> adapt to the standardized interface.
> 4. Implementations that don't want to provide basic implementations
> can throw UnsupportedOperationException from the extra methods as a
> last resort.
>
> On the other hand, how much would it take to support the full suite of
> SslEngineFactory operations in Connect? Could part of this KIP be
> improving Connect to make use of these methods? This would help unify
> the experience for users that implement the interface specifically for
> the dynamic reconfiguration support, and rely on it on the broker
> side.
>
> Taras, are you interested in dynamic SSL reconfiguration in Connect?
> Would you be willing to investigate the details of that for the KIP?
>
> Thanks,
> Greg
>
> On Mon, Dec 4, 2023 at 1:17 PM Chris Egerton <chr...@aiven.io.invalid> wrote:
> >
> > Hi Taras,
> >
> > Regarding slimming down the interface: IMO, we should do this right the
> > first time, and that includes not requiring unnecessary methods from users.
> > I think BaseSslEngineFactory is good enough as a superinterface.
> >
> >
> > Regarding the parsing logic: I think the KIP needs to be more explicit. We
> > should add something like this to the proposed changes section:
> >
> > "If any properties are present in the worker config with a prefix of
> > "listeners.https.", then only properties with that prefix will be passed to
> > the SSL engine factory. Otherwise, all top-level worker properties will be
> > passed to the SSL engine factory. Note that this differs slightly from
> > existing logic in that the set of properties (prefixed or otherwise) will
> > not be filtered based on a predefined set of keys; this will enable custom
> > SSL engine factories to define and accept custom properties."
> >
> > I also took a quick look at the prototype (I usually try not to do this
> > since we vote on KIP documents, not PRs). I don't think we should populate
> > default values for SSL-related properties before sending properties to the
> > SSL engine factory, since it may confuse users who have written custom SSL
> > engine factories to see that properties not specified in their Connect
> > worker config are being passed to their factory. Instead, the default SSL
> > engine factory used by Connect can perform this logic, and we can let other
> > custom factories be responsible for their own default values.
> >
> >
> > Cheers,
> >
> > Chris
> >
> > On Wed, Nov 29, 2023 at 8:36 AM Taras Ledkov <tled...@apache.org> wrote:
> >
> > > Hi team,
> > >
> > > Ping for review / vote for KIP-967 [1].
> > > Voting thread is here [2]
> > >
> > > [1].
> > > https://cwiki.apache.org/confluence/display/KAFKA/KIP-967%3A+Support+custom+SSL+configuration+for+Kafka+Connect+RestServer
> > > [2]. https://github.com/apache/kafka/pull/14203
> > > [2]. https://lists.apache.org/thread/wc4v5v3pynl15g1q547m2croqsqgmzpw
> > >
> > > --
> > > With best regards,
> > > Taras Ledkov
> > >

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