NServiceBus.RabbitMQ

NServiceBus.RabbitMQ supports sending messages over RabbitMQ using the RabbitMQ .NET Client.

It is part of the Particular Service Platform, which includes NServiceBus and tools to build, monitor, and debug distributed systems.

See the RabbitMQ Transport documentation for more details on how to use it.

Running tests locally

All tests use the default connection string host=localhost. This can be changed by setting the RabbitMQTransport_ConnectionString environment variable.

For developers using Docker containers, the following docker command will quickly setup a container configured to use the default port:

docker run -d --hostname my-rabbit --name my-rabbit -p 5672:5672 -p 15672:15672 rabbitmq:3-management

With this setup, the default connection string will work.

Setting up a docker cluster

A 3-node RabbitMQ cluster with a HAProxy load balancer in front and by default mirroring all queues across all 3 nodes can be set up using docker for testing or development purposes by running the following script:

Setup cluster network:

docker network create --driver bridge rabbitnet

Setup cluster:

docker run -d --network rabbitnet --hostname rabbit1 --name rabbit1 -v rabbitmq-data:/var/lib/rabbitmq rabbitmq:3-management
docker run -d --network rabbitnet --hostname rabbit2 --name rabbit2 -v rabbitmq-data:/var/lib/rabbitmq rabbitmq:3-management
docker run -d --network rabbitnet --hostname rabbit3 --name rabbit3 -v rabbitmq-data:/var/lib/rabbitmq rabbitmq:3-management

docker exec rabbit2 rabbitmqctl stop_app
docker exec rabbit2 rabbitmqctl join_cluster rabbit@rabbit1
docker exec rabbit2 rabbitmqctl start_app

docker exec rabbit3 rabbitmqctl stop_app
docker exec rabbit3 rabbitmqctl join_cluster rabbit@rabbit1
docker exec rabbit3 rabbitmqctl start_app

Setup classic queue mirroring:

Note that mirroring of classic queues will be removed in a future version of RabbitMQ. Consider using quorum queues instead.

docker exec rabbit1 rabbitmqctl set_policy ha-all "\." '{"ha-mode":"exactly","ha-params":2,"ha-sync-mode":"automatic"}'

Create haproxy.cfg file for configuring HAProxy:

global
        log 127.0.0.1   local1
        maxconn 4096
 
defaults
        log     global
        mode    tcp
        option  tcplog
        retries 3
        option redispatch
        maxconn 2000
        timeout connect 5000
        timeout client 50000
        timeout server 50000
 
listen  stats
        bind *:1936
        mode http
        stats enable
        stats hide-version
        stats realm Haproxy\ Statistics
        stats uri /
 
listen rabbitmq
        bind *:5672
        mode            tcp
        balance         roundrobin
        timeout client  3h
        timeout server  3h
        option          clitcpka
        server          rabbit1 rabbit1:5672  check inter 5s rise 2 fall 3
        server          rabbit2 rabbit2:5672  check inter 5s rise 2 fall 3
        server          rabbit3 rabbit3:5672  check inter 5s rise 2 fall 3

listen mgmt
        bind *:15672
        mode            tcp
        balance         roundrobin
        timeout client  3h
        timeout server  3h
        option          clitcpka
        server          rabbit1 rabbit1:15672  check inter 5s rise 2 fall 3
        server          rabbit2 rabbit2:15672  check inter 5s rise 2 fall 3
        server          rabbit3 rabbit3:15672  check inter 5s rise 2 fall 3

Setup HAProxy container, note correct the path where haproxy.cfg is saved.

docker run -d --network rabbitnet --hostname rabbitha --name rabbitha -p 15672:15672 -p 5672:5672 -v ./haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro haproxy:1.7

Setup quorum queues:

quorum queues

After all these commands have run, a 3-node RabbitMQ cluster will be running that should be accessible via the load balancer.

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