Figure out how to easily update and distribute pricing data
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Key: LIBCLOUD-87
URL: https://issues.apache.org/jira/browse/LIBCLOUD-87
Project: Libcloud
Issue Type: New Feature
Components: Compute, Core
Reporter: Tomaz Muraus
Now that all the compute pricing data is contained in a single JSON file
(data/pricing.json), updating it will in 95% cases only mean updating this
file. This is a lot easier and requires a lot less work then changing variables
in each driver file separately.
We should figure out the best way to distribute this JSON file and implement
some kind of auto-update functionality in the library.
There are some problems which we need to think about:
- where to host this file? It should probably be hosted on a SSL enabled
apache.org server
- where should the file be saved locally? We should probably default to some
temporary folder, but user should be able to specify a custom one
- how often to check for updates? We should default to some sane period, like
every 12-86 hours users but, user should also be able to override this setting
- should "auto-update" functionality be enabled by default?
The whole API for this functionality could look something like this:
import libcloud.pricing
libcloud.pricing.AUTO_UPDATE = True
libcloud.pricing.DATA_PATH = "/home/my/some/path/"
libcloud.pricing.UPDATE_INTERVAL = 86 * 60 * 60
bool pricing.check_for_update() // <- this would manually force the library to
check if there is new pricing data available
bool pricing.force_update() // check if there is new pricing data available and
if it is, download it
We should also use some sane default values which would mean user would only
need to enable it if it would be disabled by default.
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