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create-rabbitmq-cluster.md

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Steps to create a RabbitMQ cluster

We need to create a RabbitMQ cluster to be used by the application. We can use the Azure Marketplace to create a RabbitMQ cluster. Navigate to the Azure Marketplace and search for RabbitMQ. Select the RabbitMQ by Bitnami option and click on Create.

Make sure the name the VM as rabbitmq and the resource group as azure-container-app-rg. This is important as we will be using the same name in the next step.

If you decide to use any other name for the VM, make sure you update the rabbitmq hostname in all the places where it is referenced such as Dapr pubsub component, KEDA autoscaler etc.

Enable RabbitMQ ports

Run the following commands to enable the RabbitMQ ports:

az vm open-port --port 5672 --name rabbitmq  `
    --resource-group azure-container-app-rg

az vm open-port --port 15672 --name rabbitmq `
    --resource-group azure-container-app-rg --priority 1100

The 5672 port is used by the RabbitMQ cluster to communicate with the microservices. 15672 port is used to access the RabbitMQ management console. Opening the 5672 allows us to connect to the RabbitMQ cluster from the microservices. Opening the 15672 port allows us to access the RabbitMQ management console from the browser.

Check the RabbitMQ password

In order to connect to the RabbitMQ cluster, we need to get the password. The default user is user. When the RabbitMQ cluster is created, we use the azureuser as the default user. Connect to the RabbitMQ cluster using the azureuser and find the password for the user user.

ssh azureuser@<<publicIP of the RabbitMQ server>>

Replace the placeholder <<publicIP of the RabbitMQ server>> with the public IP of the RabbitMQ server. You can find the public IP of the RabbitMQ server in the Azure Portal.

Below is a screenshot of the Azure Portal showing the public IP of the RabbitMQ server.

RabbitMQ public IP

Once you are connected to the RabbitMQ server, run the following command to get the password for the user user.

cat ./bitnami_credentials

The output of the command will be similar to the following:

RabbitMQ default password

Update the RabbitMQ password

It is better to update the default password. Use the rabbitmq command-line utility rabbitmqctl to change the password for the user user.

sudo rabbitmqctl change_password user tCUN6UizuwTZ

sudo rabbitmqctl add_user test test
sudo rabbitmqctl set_user_tags test administrator
sudo rabbitmqctl set_permissions -p / test ".*" ".*" ".*"

You can replace the placeholder tCUN6UizuwTZ with the password you want to use. If you decide to change the password, make a note of it as we will need it later to configure the Dapr pubsub component as well as the KEDA autoscaler.

For recent versions of RabbitMQ guest user is not allowed. Need to use the test user with specific permissions when connecting from remote machine. This is applicable when creating the queue using Management UI. Update the cedentials accordingly.