RabbitMQ

RabbitMQ.md

RabbitMQ

rabbitmqadmin

• Get a list of exchanges for the specified vhost rabbitmqadmin -V / list exchanges
• Get a list of queues, with some columns specified rabbitmqadmin list queues vhost name node messages message_stats.publish_details.rate
• Get a list of queues with all details we can take rabbitmqadmin -f long -d 3 list queues
• Publish a message rabbitmqadmin publish exchange=amq.default routing_key=test payload="hello, world"
• Get it back rabbitmqadmin get queue=test ackmode=ack_requeue_false
• Export Configuration (Definitions) rabbitmqadmin export rabbit.definitions.json

rabbitmqctl

• rabbitmqctl -l to list commands
• rabbitmqctl status to show memory
• rabbitmqctl stop_app and rabbitmqctl start_app
• rabbitmqctl reset and rabbitmqctl force_reset
• rabbitmqctl rotate_logs
• rabbitmqctl join_cluster join a cluster as either a disc (default) or ram only
• rabbitmqctl purge_queue <queue> to remove all messages in it
• rabbitmqctl list_queues
• rabbitmqctl list_exchanges

rabbitmq-plugins

• rabbitmq-plugins list to see what plugins are enabled
• rabbitmq-plugins enable <plugin-name> to enable a plugin
• rabbitmq-plugins disable <plugin-name> to disable a plugin

Plugin List

• rabbitmq_auth_backend_http - authentication / authorisation plguin that uses an external HTTP API
• rabbitmq_management - a management / monitoring API over HTTP, along with a browser-based UI (I use this all the time)
• rabbitmq_shovel - a plugin that shovels messages from a queue on one broker to an exchange on another broker
• rabbitmq_tracing - provides a GUI to capture traced messages and log them in text or JSON format
• rabbitmq-top is used to analyze node memory use
• rabbitmq-mqtt - lightweight messaging protcol for small sensors and mobile devices; good for high-latency or unreliable networks

debugging

• Start debugging

1. Install missing plugins

# Enable web console
sudo rabbitmq-plugins enable rabbitmq_management
# Enable tracing pluging
sudo rabbitmq-plugins enable rabbitmq_tracing
# Add a super admin user
sudo rabbitmqctl add_user admin password
sudo rabbitmqctl set_user_tags admin administrator
sudo rabbitmqctl set_permissions -p / admin ".*" ".*" ".*"
# restart RabbutMQ server
systemctl restart rabbitmq-server

2. Run sudo rabbitmqctl trace_on
3. Go to http://localhost:15672/#/traces/ and create a topic queue for trace messages. The pattern can be # to capture all messages or a topic in the form of publish.[exchange name] or deliver.[queue name] to trace messages published through a particular exchange or consumed from a particular queue. Clicking on the log name will bring up the log The log files are located to /var/tmp/rabbitmq-tracing

• Stop debugging

1. Run sudo rabbitmqctl trace_off
2. Delete the trace logs