Exchange federation question

[kotyara85]

Hello,
I have two separate clusters and want to federate them to fanout messages from one cluster to another.
I did setup exchanges, policies, upstreams, but when I send a message from cluster1 -> cluster2 I don't see this message in demo queue on cluster2

Any suggestions?

Thank you

[michaelklishin]

I will convert this issue to a GitHub discussion. Currently GitHub will automatically close and lock the issue even though your question will be transferred and responded to elsewhere. This is to let you know that we do not intend to ignore this but this is how the current GitHub conversion mechanism makes it seem for the users :(

[michaelklishin]

I't s a bit difficult to suggest much since you haven't shared any specific steps that were taken.
If you seek community, leave alone the core team help, please help others help you and share as much relevant information as possible. We do not guess in this community: guessing is a very expensive approach to troubleshooting.

First I'd verify is that your exchanges are actually federated. This means they must be matched by a policy and the downstream side must open connections (links) to the upstream. If that does not happen, then the most likely reasons are

• Policies were applied on the wrong side
• The policy that matches the exchanges does not enable federation (only one policy matches an object at any given time)

Federation links will be marked as such with an appropriate subscript "client type" on the connection page.

Assuming that exchange federation links run and there is a message flow on the upstream side, the links should demonstrate
traffic flow and the federated (downstream) exchanges should have > 0 ingress message rates. From there, routing would work
exactly the same as it would without federation. Perhaps the only difference is that the rabbitmq_federation plugin will propagate bindings
for the federated exchanges when it can do so.

[kotyara85]

This's how my topology looks like.
Links are up and I do see active connections between the clusters.

Exchange configuration on both sides

Policies

I can send messages directly from cluster 2 cluster if I click on demo@cluster2 queue for example, but that's it

Thank you

[michaelklishin]

According to the exchange page, it is not matched by any policies.

[michaelklishin]

Since the name does match the pattern, quite likely that you have other policies that match the same object with a higher (or equal) priority. Alternatively this policy may be applied on the wrong side: federation links are started by the downstream for every exchange or queue that is matched by a policy that enables federation (by including an upstream or upstream set name).

[michaelklishin]

Here's what an exchange matched by a policy looks like on the downstream, together with a link displayed when rabbitmq_federation_management is enabled:

On the upstream side, you can see a federation link as an inbound connection and a grayed out federated exchange on the exchange list:

[kotyara85]

Yeah, all of these are present in my setup.

Not sure what else could be wrong
Thanks

[kotyara85]

Okay, so I started from the scratch and it seems to be working now, thanks!