Version 31 (modified by 13 years ago) ( diff ) | ,
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Table of Contents
Synchronization
Purpose
Method
Overview
The synchronization process is controlled entirely by the local Sahana Eden instance.
The local Eden instance runs the scheduler process, and initiates the update requests when due, while the remote repository merely responds to these requests.
The local Eden instance first downloads the available updates from the remote repository (pull) and imports them into the local database, and then uploads all available updates from the local database to the remote repository (push).
Both pull and push are each a RESTful HTTP-request, using S3XML as data format.
Configuration
Prerequisites
Both sites must have Sahana Eden installed and running. To avoid problems with different database structures, both Sahana Eden instances should always use the same version of the software.
While performing synchronization jobs, the local site must be able to establish a connection to the remote site over the network using HTTP.
If a proxy server is to be used for the HTTP connection, this can be configured in the Synchronization Settings (proxy authentication is currently not supported).
Check that both instances have the synchronization module enabled in models/000_config.py
. If the sync section is missing from deployment_settings.modules
, then add it as follows:
deployment_settings.modules = OrderedDict([ ... # Add or uncomment this section, if it is missing or commented: ("sync", Storage( name_nice = T("Synchronization"), description = T("Synchronization"), restricted = True, access = "|1|", # Only Administrators can see this module in the default menu & access the controller module_type = 0 # This item is handled separately for the menu )), ... ])
Synchronization Homepage
Login as administrator and open the Administration menu. In the left menu, you find the following entries:
Click on Synchronization here to open the homepage of the Synchronization Module:
Synchronization Settings
Go to the Synchronization Homepage and click Settings to open this page:
UUID
This page shows you the UUID (universally unique identifier) of this repository. You will need this identifier to register the repository at the peer site (the local UUID to register at the remote site, and the remote UUID to register at the local site). The UUID is created during the first run of the Sahana Eden instance, and cannot be changed.
To Do
...at the local site:
- if needed, enter the complete URL of the proxy server (including port number if not 80) that is to be used when connecting to the remote site. Click Save to update the configuration.
...at the remote site:
- no change required
Worker
The scheduled synchronization jobs are performed by a separate asynchronous web2py worker process at the local site.
To Do
...at the local site:
To start the worker process, open a shell on the local server, change into the web2py home directory and run:
python web2py.py -K eden -Q
(replace "eden" with the name of your Sahana Eden application if necessary)
In more advanced configurations you may want to run this command as a daemon process, e.g. under Linux by:
nohup python web2py.py -K eden -Q >/dev/null 2>&1 &
...at the remote site:
- no action required
Repository Configuration
Go to the Synchronization Homepage and click Repositories. This will show you a list of all configured repositories:
The Open button in each line opens the configuration for the respective repository.
By clicking Add Repository, you can add a new peer repository configuration:
Field Instructions at the local site at the remote site Name Enter a name for own reference required required URL Enter the URL of the repository required - username Enter the username to authenticate at the repository required - password Enter the password to authenticate at the repository required - proxy Enter the URL of a proxy server to connect to the repository, if different from the Synchronization Settings fill in as needed - Accept Pushes check this if the repository is allowed to push updates - set as needed UUID Enter the UUID from the Synchronization Settings of the repository required required
To Do
...at the local site:
- add a repository configuration for the remote site
...at the remote site:
- add a repository configuration for the local site
Attachments (10)
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sync1.png
(23.7 KB
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Synchronization Overview
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sync_menu.png
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Synchronization Menu
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sync_homepage.png
(30.4 KB
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Synchronization Homepage
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sync_repository_log.png
(80.5 KB
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Repository Log
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sync_repository_log_entry.png
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Repository Log Entry
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sync_repository_add.png
(13.3 KB
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Repository Registration
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sync_repository.png
(23.9 KB
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Repository Registry
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sync_config.png
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Synchronization Settings
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sync_schedule_add.png
(28.7 KB
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Synchronization Schedule
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sync_resource_add.png
(40.9 KB
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Resource Configuration
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