Saturday, August 12, 2017

Debian 9 - RabbitMQ Installation Notes

Add respository below into /etc/apt/sources.list
    deb http://www.rabbitmq.com/debian/ testing main
    apt-get update
Install
    apt-get install rabbitmq-server -y

Check Status
    service rabbitmq-server status

version check
    rabbitmqctl status | grep RabbitMQ 

Enable plugins required for rabbitmq management console
    rabbitmq-plugins enable rabbitmq_management

Create User:
    rabbitmqctl add_user myuser mypass

Add User to administrator role
    rabbitmqctl set_user_tags myuser administrator

Give All Access to User myuser:
    rabbitmqctl set_permissions -p / myuser ".*" ".*" ".*"

Set Connection limit:
    echo "ulimit -n [limit]" | sudo tee /etc/default/rabbitmq-server

Web Admin:
    http://localhost:15672/


CLI:
Download https://raw.githubusercontent.com/rabbitmq/rabbitmq-management/rabbitmq_v3_6_10/bin/rabbitmqadmin python script,move it /usr/local/bin
   
    chmod +x rabbitmqadmin
    rabbitmqadmin --help

List all users
    rabbitmqadmin list users

List Exchanges:
    python rabbitmqadmin list exchanges

List Node:
    rabbitmqadmin list nodes
    rabbitmqadmin --username=myuser --password=mypass list nodes

List queue:
    rabbitmqadmin --username=guest --password=guest list queues

Export Configuration:
    rabbitmqadmin export rabbit.definitions.json

Import Configuration:
    rabbitmqadmin -q import rabbit.definitions.json

Close all connections:
    rabbitmqadmin -f tsv -q list connections name | while read conn ; do rabbitmqadmin -q close connection name="${conn}" ; done

declare a new queue:
    rabbitmqadmin declare queue name="temp_q" durable=true auto_delete=false

declaring an exchange:
    rabbitmqadmin declare exchange name="tempExchange" type="direct" auto_delete=false

    possible values for type of exchange are Direct,Fanout,Topic & Headers.

declaring a Binding:
    rabbitmqadmin declare binding source="myExchange" destination_type="queue" destination="myQueue" routing_key="myMessage"

Purge a single queue:
    rabbitmqadmin purge queue name=jobs
    output:
        queue purged

First Message of queue:
    rabbitmqadmin --username=sangram --password=sangram get queue=jobs requeue=false count=10
    output:
        +-------------+----------+---------------+-----------------------------+---------------+------------------+-------------+
        | routing_key | exchange | message_count |           payload           | payload_bytes | payload_encoding | redelivered |
        +-------------+----------+---------------+-----------------------------+---------------+------------------+-------------+
        | jobs        |          | 28            | 1500218536:: work work work | 27            | string           | True        |
        | jobs        |          | 27            | 1500218537:: work work work | 27            | string           | True        |
        | jobs        |          | 26            | 1500218538:: work work work | 27            | string           | True        |
        | jobs        |          | 25            | 1500218539:: work work work | 27            | string           | True        |
        | jobs        |          | 24            | 1500218540:: work work work | 27            | string           | True        |
        | jobs        |          | 23            | 1500218541:: work work work | 27            | string           | True        |
        | jobs        |          | 22            | 1500218542:: work work work | 27            | string           | True        |
        | jobs        |          | 21            | 1500218543:: work work work | 27            | string           | True        |
        | jobs        |          | 20            | 1500218544:: work work work | 27            | string           | True        |
        | jobs        |          | 19            | 1500218545:: work work work | 27            | string           | True        |
        +-------------+----------+---------------+-----------------------------+---------------+------------------+-------------+

   
    if we add "requeue=false count=10" then last 10 get removed from queue for next view of this queue.



        rabbitmqadmin get queue=jobs requeue=false count=10 or

    rabbitmqadmin --username=sangram --password=sangram get queue=jobs count=10
    output:

            +-------------+----------+---------------+-----------------------------+---------------+------------------+-------------+
            | routing_key | exchange | message_count |           payload           | payload_bytes | payload_encoding | redelivered |
            +-------------+----------+---------------+-----------------------------+---------------+------------------+-------------+
            | jobs        |          | 8             | 1500218347:: work work work | 27            | string           | True        |
            | jobs        |          | 7             | 1500218348:: work work work | 27            | string           | False       |
            | jobs        |          | 6             | 1500218349:: work work work | 27            | string           | False       |
            | jobs        |          | 5             | 1500218350:: work work work | 27            | string           | False       |
            | jobs        |          | 4             | 1500218351:: work work work | 27            | string           | False       |
            | jobs        |          | 3             | 1500218352:: work work work | 27            | string           | False       |
            | jobs        |          | 2             | 1500218353:: work work work | 27            | string           | False       |
            | jobs        |          | 1             | 1500218354:: work work work | 27            | string           | False       |
            | jobs        |          | 0             | 1500218355:: work work work | 27            | string           | False       |
            +-------------+----------+---------------+-----------------------------+---------------+------------------+-------------+   

    rabbitmqadmin get queue=jobs count=-1
        output:
            +-------------+----------+---------------+-----------------------------+---------------+------------------+-------------+
            | routing_key | exchange | message_count |           payload           | payload_bytes | payload_encoding | redelivered |
            +-------------+----------+---------------+-----------------------------+---------------+------------------+-------------+
            | jobs        |          | 40            | 1500219135:: work work work | 27            | string           | True        |
            | jobs        |          | 39            | 1500219136:: work work work | 27            | string           | True        |
            | jobs        |          | 38            | 1500219137:: work work work | 27            | string           | True        |
            | jobs        |          | 37            | 1500219138:: work work work | 27            | string           | True        |
            | jobs        |          | 36            | 1500219159:: work work work | 27            | string           | True        |
            | jobs        |          | 35            | 1500219160:: work work work | 27            | string           | True        |
            | jobs        |          | 34            | 1500219161:: work work work | 27            | string           | True        |
            | jobs        |          | 33            | 1500219162:: work work work | 27            | string           | True        |
            | jobs        |          | 32            | 1500219163:: work work work | 27            | string           | True        |
            | jobs        |          | 31            | 1500219164:: work work work | 27            | string           | True        |
            | jobs        |          | 30            | 1500219165:: work work work | 27            | string           | True        |
            | jobs        |          | 29            | 1500219166:: work work work | 27            | string           | True        |
            | jobs        |          | 28            | 1500219167:: work work work | 27            | string           | True        |
            | jobs        |          | 27            | 1500219168:: work work work | 27            | string           | True        |
            | jobs        |          | 26            | 1500219169:: work work work | 27            | string           | True        |
            | jobs        |          | 25            | 1500219170:: work work work | 27            | string           | True        |
            | jobs        |          | 24            | 1500219171:: work work work | 27            | string           | True        |
            | jobs        |          | 23            | 1500219172:: work work work | 27            | string           | True        |
            | jobs        |          | 22            | 1500219173:: work work work | 27            | string           | True        |
            | jobs        |          | 21            | 1500219174:: work work work | 27            | string           | True        |
            | jobs        |          | 20            | 1500219175:: work work work | 27            | string           | True        |
            | jobs        |          | 19            | 1500219176:: work work work | 27            | string           | True        |
            | jobs        |          | 18            | 1500219177:: work work work | 27            | string           | True        |
            | jobs        |          | 17            | 1500219178:: work work work | 27            | string           | True        |
            | jobs        |          | 16            | 1500219179:: work work work | 27            | string           | True        |
            | jobs        |          | 15            | 1500219180:: work work work | 27            | string           | True        |
            | jobs        |          | 14            | 1500219181:: work work work | 27            | string           | True        |
            | jobs        |          | 13            | 1500219182:: work work work | 27            | string           | True        |
            | jobs        |          | 12            | 1500219183:: work work work | 27            | string           | True        |
            | jobs        |          | 11            | 1500219184:: work work work | 27            | string           | True        |
            | jobs        |          | 10            | 1500219185:: work work work | 27            | string           | True        |
            | jobs        |          | 9             | 1500219186:: work work work | 27            | string           | True        |
            | jobs        |          | 8             | 1500219187:: work work work | 27            | string           | True        |
            | jobs        |          | 7             | 1500219188:: work work work | 27            | string           | True        |
            | jobs        |          | 6             | 1500219189:: work work work | 27            | string           | True        |
            | jobs        |          | 5             | 1500219190:: work work work | 27            | string           | True        |
            | jobs        |          | 4             | 1500219191:: work work work | 27            | string           | True        |
            | jobs        |          | 3             | 1500219192:: work work work | 27            | string           | True        |
            | jobs        |          | 2             | 1500219193:: work work work | 27            | string           | False       |
            | jobs        |          | 1             | 1500219194:: work work work | 27            | string           | False       |
            | jobs        |          | 0             | 1500219195:: work work work | 27            | string           | False       |
            +-------------+----------+---------------+-----------------------------+---------------+------------------+-------------+   

        "count=-1" forces all messges to display absence of count give only first message.


        When we have both publisher & subscriber running effectively publisher publish the message & worker get those message to act on and get removed from queue.


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