About RabbitMQ Alert

Send notifications when predefined conditions are met.

Which conditions?

• Ready messages
• Unacknowledged messages
• Total queued messages
• Number of connected consumers
• Number of open connections
• Number of nodes running
• Memory used by each node in MBs

My inspiration to create this notification sender is to monitor a set of Celery workers. Sometimes they stop working and monitoring

the queue size seems to be an easy way to know when these situations happen. Additionally, automatically monitoring the queue sizes

is a great way to scale up/down the number of workers.

What type of notifications?

Currently the following are supported:

• E-mails
• Slack messages
• Telegram messages

Installation

Use the PIP command, which should already exist in your Linux installation:

sudo pip install rabbitmq-alert

Usage

Execute with options

You can execute rabbitmq-alert along using the provided options, but first take a look at --help to see whats available

and the purpose of each option.

Example:

sudo rabbitmq-alert \
    --host=my-server --port=55672 --username=guest --password=guest \
    --vhost=%2F --queue=my_queue1,my_queue2 --ready-queue-size=3 --check-rate=300 \
    --email-to=admin@example.com --email-from=admin@example.com \
    --email-subject="RabbitMQ alert at %s - %s" --email-server=localhost

Execute with the global configuration file

Copy the example configuration file to the default path of the global configuration file:

sudo cp /etc/rabbitmq-alert/config.ini.example /etc/rabbitmq-alert/config.ini

Edit it with you preferred settings. Then you are ready to execute rabbitmq-alert

using the global configuration file. Just execute:

sudo rabbitmq-alert

Execute with a custom configuration file

Alternatively, you can use a custom configuration file. For the required format, take a look

at the /etc/rabbitmq-alert/config.ini.example file.

Then execute rabbitmq-alert with the configuration file option:

sudo rabbitmq-alert -c my_config.ini

For a detailed description of the available sections and options, view this wiki page.

Different options per queue

Except conditions for all queues, you can also define queue specific conditions

in the configuration file, in case you want to have fine-tuned options for each queue.

Just create a [Conditions] section for each queue. Example:

[Conditions:my-queue]
...

[Conditions:my-other-queue]
...

Note that queue names also have to be defined in the [Server] section of the configuration file:

[Server]
...
queues=my-queue,my-other-queue
...

Execute as a daemon

A systemd script is created upon installation with PIP.

Use the following commands to reload the systemd configuration

and start rabbitmq-alert as a daemon.

sudo systemctl daemon-reload
sudo systemctl start rabbitmq-alert

To have rabbitmq-alert always started on boot:

sudo systemctl enable rabbitmq-alert

In case your system still uses init.d, an init.d script has been created in /etc/init.d upon PIP installation. To start rabbitmq-alert as a daemon:

sudo /etc/init.d/rabbitmq-alert start

To have rabbitmq-alert always started on boot:

sudo update-rc.d rabbitmq-alert defaults

Execute in a container

There is a docker image for the project. First, you have to create a configuration file

for rabbitmq-alert, which will then be copied into the container. Then you can run

rabbitmq-alert inside a container.

docker run -d --name rabbitmq-alert -v config.ini:/etc/rabbitmq-alert/config.ini \
mylkoh/rabbitmq-alert:latest

For the configuration file, advise the config.ini.example that exists in the project's repository.

Logging

You can find the logs of rabbitmq-alert to /var/log/rabbitmq-alert/.

Log files are rotated in a daily basis.

Contribute

The project rabbitmq-alert is written in python2.

Of course, you can contribute to the project. Take a look at the GitHub “Issues” page and pick an issue to implement / fix.

Fork the project, develop and then create a pull request, in order for your code to be added to the project.

Prepare your environment

To start, you have to install the dev dependencies which are some required python packages:

make deps-dev

Run the tests!

After writing your awesomeness, run the test suites to ensure that everything is still fine:

make test

Firstly, ensure that you have removed the rabbitmqalert package from your system. Otherwise you may find yourself running the tests on the installed package instead of the source code.

Do add tests yourself for the code you contribute to ensure the quality of the project.

Happy coding :-)

Playing with the container

Create a network that all containers will belong to:

docker network create rabbitmq-alert

Run rabbitmq into a container:

docker run -d --name some-rabbit --net rabbitmq-alert -p 15672:15672 rabbitmq:management

You can then go to http://localhost:15672 in a browser to use the management plugin.

The username and password are both guest.

Create a fake SMTP server and check everything is okay with the email message functionality:

docker run -d --name fake-smtp --net rabbitmq-alert -p 25:25 munkyboy/fakesmtp

Now, run rabbitmq-alert using the same network:

docker run -d --name rabbitmq-alert --net rabbitmq-alert \
-v config.ini:/etc/rabbitmq-alert/config.ini mylkoh/rabbitmq-alert:latest

Publishing

For publishing the package and the container image, view this wiki page.