I think you can solve this already with a health check (health monitor
in OpenStack?).
I'm currently using GET requests to / and if they don't reply with a
200 code the LB
will not use them. Only the Leader answers with a 200 code whereas the
others send
a redirect with 30x code which should ensure that the requests go always
the leader.
On 01.11.2017 12:34, Chesnay Schepler wrote:
We intend to change the redirection behavior such that any jobmanager
(leading or not) can
accept requests, and communicates internally with the leader. In this
model you could setup
the flink.domain.tld to point to any jobmanager (or distribute
requests among them).
Would this work for you?
I believe this is targeted for 1.5.
On 31.10.2017 13:55, mrooding wrote:
Hi
We're running 3 job managers in high availability cluster mode backed by
OpenStack/Openshift. We're currently exposing all 3 job managers using 3
different routes (flink-1.domain.tld, flink-2.domain.tld,
flink-3.domain.tld). When accessing the route for a job manager which
isn't
the leader it automatically redirects the user to the host and port
of the
leading job manager. From what I've seen in the source code the rpc
address
and port are being used to redirect. Since the internal hostnames are
not
accessible outside the cluster this obviously doesn't work.
The nicest solution would be a single route (flink.domain.tld) which
would
correctly delegate requests to the leading job manager. The second best
solution would probably be the possibility to declare a public URL in
the
flink configuration file.
I'd be more than happy to contribute to Flink and add support for
this but
I'd love to hear your ideas about it.
Kind regards
Marc
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