clusterdock 1.4.0

clusterdock is a framework for creating Docker-based container clusters

===========
clusterdock
===========

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**clusterdock** is a Python 3 project that enables users to build,
start, and manage Docker container-based clusters. It uses a pluggable
system for defining new types of clusters using folders called *topologies* and
is a swell project, if I may say so myself.

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"I hate reading, make this quick."
==================================

Before doing anything, install a recent version of `Docker`_ to your machine. Next,
clone a clusterdock topology to your machine. For this example,
we'll use the `nodebase topology`_.
Assuming that you've already installed **clusterdock**, you could start a 2-node cluster:

.. _Docker: https://www.docker.com/
.. _nodebase topology: https://github.com/clusterdock/topology_nodebase

.. code-block:: console

$ git clone https://github.com/clusterdock/topology_nodebase.git
$ clusterdock start topology_nodebase
2017-08-03 10:04:18 PM clusterdock.models INFO Starting cluster on network (cluster) ...
2017-08-03 10:04:18 PM clusterdock.models INFO Starting node node-1.cluster ...
2017-08-03 10:04:19 PM clusterdock.models INFO Starting node node-2.cluster ...
2017-08-03 10:04:20 PM clusterdock.models INFO Cluster started successfully (total time: 00:00:01.621).

To SSH into a node and look around:

.. code-block:: console

$ clusterdock ssh node-1.cluster
[root@node-1 ~]# ls -l / | head
total 64
dr-xr-xr-x 1 root root 4096 May 19 20:48 bin
drwxr-xr-x 5 root root 360 Aug 4 05:04 dev
drwxr-xr-x 1 root root 4096 Aug 4 05:04 etc
drwxr-xr-x 2 root root 4096 Sep 23 2011 home
dr-xr-xr-x 7 root root 4096 Mar 4 2015 lib
dr-xr-xr-x 1 root root 4096 May 19 20:48 lib64
drwx------ 2 root root 4096 Mar 4 2015 lost+found
drwxr-xr-x 2 root root 4096 Sep 23 2011 media
drwxr-xr-x 2 root root 4096 Sep 23 2011 mnt
[root@node-1 ~]# exit

To see the complete usage message for the topology:

.. code-block:: console

$ clusterdock start topology_nodebase -h
usage: clusterdock start [-h] [--node-disks map] [--always-pull]
[--namespace ns] [--network nw] [-o sys] [-r url]
[--nodes node [node ...]]
topology

Start a nodebase cluster

positional arguments:
topology A clusterdock topology directory

optional arguments:
-h, --help show this help message and exit
--always-pull Pull latest images, even if they're available locally
(default: False)
--namespace ns Namespace to use when looking for images (default:
clusterdock)
--network nw Docker network to use (default: cluster)
-o sys, --operating-system sys
Operating system to use for cluster nodes (default:
centos6.6)
-r url, --registry url
Docker Registry from which to pull images (default:
None)

nodebase arguments:
--node-disks map Map of node names to block devices (default: None)

Node groups:
--nodes node [node ...]
Nodes of the nodes group (default: ['node-1',
'node-2'])

When you're done and want to clean up:

.. code-block:: console

$ clusterdock manage nuke
2017-08-03 10:06:28 PM clusterdock.actions.manage INFO Stopping and removing all containers ...
2017-08-03 10:06:30 PM clusterdock.actions.manage INFO Removing all user-defined networks ...


=======
History
=======

1.4.0 (2018.02.21)
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* Add nodes to /etc/hosts during start.

1.3.3 (2018.02.08)
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* Fix docker-py dependency to 2.7.0.

1.3.2 (2017.11.13)
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* Added support for executing commands in detached mode.

1.3.1 (2017.11.07)
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* Fixed broken fix of volume handling from previous release.

1.3.0 (2017.11.01)
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* Fixed handling of duplicate networks.
* Made :py:meth:`clusterdock.models.Node.execute` run commands in a shell
(using ``/bin/sh`` by default).
* Fixed handling of volumes passed to :py:class:`clusterdock.models.Node`.

1.2.0 (2017.10.23)
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* Changed return type of :py:meth:`clusterdock.models.Cluster.execute`
and :py:meth:`clusterdock.models.NodeGroup.execute`.
* Added support for node devices.

1.1.0 (2017.09.21)
------------------

* Updated :py:meth:`clusterdock.models.Node.execute` to return a namedtuple with the
command's exit code and output.
* Fixed bug around ``quiet`` argument to :py:meth:`clusterdock.models.Node.execute`.
* Added support for specifying ``host:container`` port mappings when creating a node.
* Added ``ip_address`` attribute to :py:class:`clusterdock.models.Node`.

1.0.7 (2017.09.18)
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* Removed :py:const:`DEFAULT_NAMESPACE` to let topologies define their own.

1.0.6 (2017.09.04)
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* Added :py:meth:`clusterdock.models.Node.put_file` and :py:meth:`clusterdock.models.Node.get_file`.
* Made ``network`` an instance attribute of :py:class:`clusterdock.models.Cluster`.

1.0.5 (2017.09.02)
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* Added logic to pull missing images to :py:mod:`clusterdock.models`.

1.0.4 (2017.09.02)
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* Fixed missing install requirement.

1.0.3 (2017.09.02)
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* Cleaned up :py:class:`clusterdock.models.Node` API.
* Added wait_for_permission and join_url_parts utility functions.

1.0.2 (2017.08.04)
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* Updated how Cluster and Node objects are initialized.
* Added project logo.
* Doc improvements.

1.0.1 (2017.08.03)
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* First release on PyPI.