ringmaster 0.6.1

# ringmaster

Circus Ringmaster. A Tcl/Tk Control Panel for Circus.

[Circus](http://github.com/circus-tent/circus) is a program that runs and
watches processes and sockets.

Circus Ringmaster is a Tck/Tk interface to monitor, start and stop those
processes.


To the left, on the image above, are the Circus watchers. In the center, a
green string indicates the number of processes of the watcher, the current use
of CPU, and memory. To the right, command buttons – **incr**/**decr** for
normal watchers; and **start**/**stop** for singleton watchers.

## Requirements

Ringmaster is built on top of Python 3.4 (**asyncio**) and
[aiozmq](https://github.com/aio-libs/aiozmq).

Circus itself is not a code dependency, but without it this program does not
have much use.

## Installation

Latest release.

pip install ringmaster

Latest commit on the master branch of the project's Git repository.

mkdir ringmaster
cd ringmaster
curl -L https://github.com/viotti/ringmaster/tarball/master | tar -xz --strip 1
python setup.py sdist
pip install dist/ringmaster-*.tar.gz

## Installation (OS X)

1. Download and install ActiveTcl from http://www.python.org/download/mac/tcltk.
Pay atention to the recommended version on the web page.

2. Download and Install Python 3.4 from http://www.python.org/downloads.

3. Install Ringmaster.

/Library/Frameworks/Python.framework/Versions/3.4/bin/pip3 install ringmaster

This install order is important. It will make Python link with the ActiveTcl
library, instead of linking with the library shipped with OS X.

Optionally, put the Python 3 binaries in your **PATH**.

export PATH=/Library/Frameworks/Python.framework/Versions/3.4/bin:$PATH

## Basic Use

Just type **ringmaster**. There is no command line option.

ringmaster

The program will establish communication with the Circus daemon and display
the watchers on its GUI.

## Troubleshooting

### MacPorts on OS X

The Python 3.4 MacPorts distribution present a series of dificulties to run
Ringmaster on a OS X computer.

First, it does not come with the **tkinter** library, which is provided as a
separate pacakge.

Second, it will install the Ringmaster executable script in a nonstandard
location (`/opt/local/Library/Frameworks/Python.framework/Versions/3.4/bin`).

To prevent issues, use the following installation steps.

sudo port selfupdate
sudo port install py34-tkinter py34-pip
sudo pip-3.4 install ringmaster --install-option='--install-scripts=/usr/local/bin'

Finally, if you install Ringmaster on a virtual environment created with
**virtualenv-3.4** from MacPorts, it will abort with a **ImportError: No module
named '_tkinter'** exception. This is because the virtual environment
insultates itself from Python packages installed in the system. The solution
here is to link the Tkinter shared object to the **site-packages** directory
of the environment.

ln -s $(port -q contents py34-tkinter | grep _tkinter.so) $VIRTUAL_ENV/lib/python3.4/site-packages

## TODO

* Implement command line options for the connection endpoints.
* Improve the watcher details dialog.