By default, when you create a connection to the EC2 service in
boto, it connects to the US-EAST-1 region. Originally, that
was the only region available, but AWS has expanded its operations
considerably and, at the time of this writing, EC2 was available in the
following regions, each with its own endpoint:
us-east-1 [US-East (Northern Virginia)]
us-west-1 [US-West (Northern California)]
eu-west-1 [EU (Ireland)]
ap-southeast-1 [Asia Pacific (Singapore)]
ap-northeast-1 [Asia Pacific (Tokyo)]
boto provides a number of ways to find and connect to
these regions. For example, the following will return a list of all
RegionInfo objects for a given service (EC2 in this case). Each of those
RegionInfo objects has a connect method, which will return a
Connection object for that region:
$ python Python 2.7.1 (r271:86882M, Nov 30 2010, 10:35:34) [GCC 4.2.1 (Apple Inc. build 5664)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import boto.ec2 >>> boto.ec2.regions() [RegionInfo:eu-west-1, RegionInfo:us-east-1, RegionInfo:ap-northeast-1, RegionInfo:us-west-1, RegionInfo:ap-southeast-1] >>> eu_conn = _[0].connect()
If you have the name of the region you want to connect to, you can also use this approach:
$ python
Python 2.7.1 (r271:86882M, Nov 30 2010, 10:35:34)
[GCC 4.2.1 (Apple Inc. build 5664)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import boto.ec2
>>> eu_conn = boto.ec2.connect_to_region('eu-west-1')
>>>Finally, if you would like to change the default region
boto uses when creating an EC2 connection, you can do so by
adding something like this to your boto config file:
[Boto] ec2_region_name = eu-west-1
Once this has been added to your boto config file, when
you call boto.connect_ec2 without any parameters you will get
a connection to the eu-west-1 region.