Commit c56ffe39 authored by Julien Muchembled's avatar Julien Muchembled

Convert README to reStructuredText

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NEO is a distributed, redundant and scalable implementation of ZODB API. NEO is a distributed, redundant and scalable implementation of ZODB API.
NEO stands for Nexedi Enterprise Object. NEO stands for Nexedi Enterprise Object.
Requirements Overview
========
- Linux 2.6 or later A NEO cluster is composed of the following types of nodes:
- Python 2.4 or later - "master" nodes (mandatory, 1 or more)
- For python 2.4: ctypes http://python.net/crew/theller/ctypes/ Takes care of transactionality. Only one master node is really active
(packaged with later python versions) (the active master node is called "primary master") at any given time,
Note that setup.py does not define any dependency to 'ctypes' so you will extra masters are spares (they are called "secondary masters").
have to install it explicitely.
- MySQLdb http://sourceforge.net/projects/mysql-python - "storage" nodes (mandatory, 1 or more)
- ZODB 3.10 or later (requires python 2.5 or later, only for client nodes) Stores data in a MySQL database. All available storage nodes are in use
simultaneously. This offers redundancy and data distribution.
Overview - "admin" nodes (mandatory for startup, optional after)
A NEO cluster is composed of the following types of nodes: Accepts commands from neoctl tool and transmits them to the
primary master, and monitors cluster state.
- "master" nodes (mandatory, 1 or more) - "client" nodes
Takes care of transactionality. Only one master node is really active
(the active master node is called "primary master") at any given time,
extra masters are spares (they are called "secondary masters").
- "storage" nodes (mandatory, 1 or more) Well... Something needing to store/load data in a NEO cluster.
Stores data in a MySQL database. All available storage nodes are in use
simultaneously. This offers redundancy and data distribution.
- "admin" nodes (mandatory for startup, optional after) Disclaimer
Accepts commands from neoctl tool and transmits them to the ==========
primary master, and monitors cluster state.
- "client" nodes In addition of the disclaimer contained in the licence this code is
Well... Something needing to store/load data in a NEO cluster. released under, please consider the following.
Disclaimer NEO does not implement any authentication mechanism between its nodes, and
does not encrypt data exchanged between nodes either.
If you want to protect your cluster from malicious nodes, or your data from
being snooped, please consider encrypted tunelling (such as openvpn).
In addition of the disclaimer contained in the licence this code is Requirements
released under, please consider the following. ============
NEO does not implement any authentication mechanism between its nodes, and - Linux 2.6 or later
does not encrypt data exchanged between nodes either.
If you want to protect your cluster from malicious nodes, or your data from - Python 2.4 or later
being snooped, please consider encrypted tunelling (such as openvpn).
- For python 2.4: ctypes http://python.net/crew/theller/ctypes/
(packaged with later python versions)
Note that setup.py does not define any dependency to 'ctypes' so you will
have to install it explicitely.
- MySQLdb http://sourceforge.net/projects/mysql-python
- ZODB 3.10 or later (requires python 2.5 or later, only for client nodes)
Installation Installation
============
a. Make neo directory available for python to import (for example, by a. Make neo directory available for python to import (for example, by
adding its container directory to the PYTHONPATH environment variable). adding its container directory to the PYTHONPATH environment variable).
b. Choose a cluster name and setup a MySQL database b. Choose a cluster name and setup a MySQL database
c. Start all required nodes : c. Start all required nodes::
neomaster --cluster=<cluster name> neomaster --cluster=<cluster name>
neostorage --cluster=<cluster name> --database=user:passwd@host neostorage --cluster=<cluster name> --database=user:passwd@host
neoadmin --cluster=<cluster name> neoadmin --cluster=<cluster name>
d. Tell the cluster it can provide service. d. Tell the cluster it can provide service::
neoctl start neoctl start
How to use How to use
==========
1. In zope: In zope
-------
a. Copy neo directory to /path/to/your/zope/lib/python a. Copy neo directory to /path/to/your/zope/lib/python
b. Edit your zope.conf, add a neo import and edit the `zodb_db` section by b. Edit your zope.conf, add a neo import and edit the `zodb_db` section by
replacing its filestorage subsection by a NEOStorage one. replacing its filestorage subsection by a NEOStorage one.
It should look like : It should look like::
%import neo.client %import neo.client
<zodb_db main> <zodb_db main>
# Main FileStorage database # Main FileStorage database
<NEOStorage> <NEOStorage>
master_nodes 127.0.0.1:10000 master_nodes 127.0.0.1:10000
name <cluster name> name <cluster name>
</NEOStorage> </NEOStorage>
mount-point / mount-point /
</zodb_db> </zodb_db>
c. Start zope c. Start zope
2. In a python script: In a Python script
------------------
a. Set your PYTHONPATH in order to be able to import Zope lib: a. Set your PYTHONPATH in order to be able to import Zope lib::
$ export PYTHONPATH=/path/to/your/zope/lib/python:$PYTHONPATH $ export PYTHONPATH=/path/to/your/zope/lib/python:$PYTHONPATH
b. Just create the storage object and play with it: b. Just create the storage object and play with it::
from neo.client.Storage import Storage from neo.client.Storage import Storage
s = Storage(master_nodes="127.0.0.1:10010", name="main") s = Storage(master_nodes="127.0.0.1:10010", name="main")
... ...
"name" and "master_nodes" parameters have the same meaning as in "name" and "master_nodes" parameters have the same meaning as in
configuration file. configuration file.
Deployment: Deployment
==========
NEO has no built-in deployment features such as process daemonization. We use NEO has no built-in deployment features such as process daemonization. We use
supervisor with configuration like below: supervisor with configuration like below::
[group:neo]
programs=master_01,storage_01,admin
[program:master_01] [group:neo]
priority=1 programs=master_01,storage_01,admin
command=neomaster -c neo -s master_01 -f /neo/neo.conf
user=neo
[program:storage_01] [program:master_01]
priority=2 priority=1
command=neostorage -c neo -s storage_01 -f /neo/neo.conf command=neomaster -c neo -s master_01 -f /neo/neo.conf
user=neo user=neo
[program:admin] [program:storage_01]
priority=3 priority=2
command=neoadmin -c neo -s admin -f /neo/neo.conf command=neostorage -c neo -s storage_01 -f /neo/neo.conf
user=neo user=neo
[program:admin]
priority=3
command=neoadmin -c neo -s admin -f /neo/neo.conf
user=neo
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