Re: [dhcwg] URIs for backend storage

Hi Tony,

Thanks for the input. In some previous drafts I’ve worked on, the URI has proved to be problematic in that there are some protocol URI’s that are conspicuous by their absence (SSH?).

However, in this case, I don’t expect it to be a problem if de-facto URIs are well enough implemented. The URI leaf would be purely a place to store this information and wouldn’t place any additional requirements that specific (standard) URI formats are supported.

If there’s no objections, we’ll add this into the next update.

Thanks,
Ian

> On 19. Mar 2018, at 22:39, Tony Finch <dot@dotat.at> wrote:
> 
> One of the questions that arose in the DHC WG meeting this afternoon was
> about a standard YANG netconf way to describe backend storage for leases.
> IIRC, someone asked if a URL would be enough and the general response was
> um, maybe?
> 
> There is a de-facto quasi-standard for database connection URLs used by
> JDBC - pretty much all SQL databases and some noSQL databases (including
> Cassandra) have a spec for describing connection details in a URL,
> including when there are multiple possible servers.
> 
> Of course, instead of a JDBC URL, you could also configure your DHCP
> server with a file: URL for old school lease storage.
> 
> I found out about this from PostgreSQL -
> https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
> 
> I haven't found a good description of C* JDBC URLs other than
> https://stackoverflow.com/questions/30743272/what-is-the-connection-url-to-be-used-for-cassandra#30795079
> which suggests that they use `--` for separating hostnames (which from
> my pedantic hostmaster point of view is mildly problematic...!)
> 
> Tony.
> -- 
> f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/  -  I xn--zr8h punycode
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