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From John Omernik <j...@omernik.com>
Subject Re: Drill Session ID between Nodes
Date Fri, 23 Jun 2017 00:24:47 GMT
Would there be interest in finding a way to globalize this? This is
challenging for me and others that may run drill with multi Tennant
orchestrators.  In my particular setup, each node running drill gets added
to an a record automatically giving me HA and distribution of Rest API
queries.  It also allows me to have a single certificate for my cluster
rather than managing certificates on a individual basis.   I set things up
to connect via IP but then I had certificate mismatch warnings. My goal is
to find a way to connect to the rest API , while maintaining a session to
single node, with out sacrificing HA and balancing and with compromising
ssl security.   I know it's a tall order, but if there I ideas outside of a
global state management I am all ears.

Note some ideas I've also considered:

1.  using a load balancer that would allow me to pin connections.  Not
ideal because it's another service to manage but it would work.

2. There may be a way to hack things with a wild card cert but it's seems
complicated and fragile.

On Jun 22, 2017 5:47 PM, "Sorabh Hamirwasia" <shamirwasia@mapr.com> wrote:

> Hi John,
> As Paul mentioned session ID's are not global. Each session is part of the
> BitToUserConnection instance created for a connection between Drillbit and
> client. Hence it's local to that Drillbit only and the lifetime of the
> session is tied to lifetime of the connection. You can find the code here<
> https://github.com/apache/drill/blob/master/exec/
> java-exec/src/main/java/org/apache/drill/exec/rpc/user/
> UserServer.java#L102>.
> Thanks,
> Sorabh
> ________________________________
> From: Paul Rogers <progers@mapr.com>
> Sent: Thursday, June 22, 2017 2:19:50 PM
> To: user@drill.apache.org
> Subject: Re: Drill Session ID between Nodes
> Hi John,
> I do not believe that session IDs are global. Each Drillbit maintains its
> own concept of sessions. A global session would require some centralized
> registry of sessions, which Drill does not have.
> Would be great if someone can confirm…
> - Paul
> > On Jun 22, 2017, at 12:14 PM, John Omernik <john@omernik.com> wrote:
> >
> > When I log onto a drill node, and get Session Id, if I connect to another
> > drill node in the cluster will the session id be valid?
> >
> > I am guessing not, but want to validate.
> >
> > My conumdrum, I have my Drill cluster running in such a way that the
> > connections to the nodes are load balanced via DNS. However, if I get a
> > IP while in session it appears to invalidate, and thus forces me to log
> > on...

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