Gregory Ramsperger created CASSANDRA-7839:
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Summary: Support standard EC2 naming conventions in Ec2Snitch
Key: CASSANDRA-7839
URL: https://issues.apache.org/jira/browse/CASSANDRA-7839
Project: Cassandra
Issue Type: Improvement
Components: Core
Reporter: Gregory Ramsperger
Attachments: conditionally-use-full-Amazon-style-naming-for-dc.patch
The EC2 snitches use datacenter and rack naming conventions inconsistent with
those presented in Amazon EC2 APIs as region and availability zone. A
discussion of this is found in CASSANDRA-4026. This has not been changed for
valid backwards compatibility reasons. Using SnitchProperties, it is possible
to switch between the legacy naming and the full, AWS-style naming.
Proposal:
* introduce a property (ec2_naming_scheme) to switch naming schemes.
* default to current/legacy naming scheme
* add support for a new scheme ("full") which is consistent AWS conventions
** data centers will be the region name, including the number
** racks will be the availability zone name, including the region name
Examples:
* * legacy* : datacenter is the part of the availability zone name preceding
the last "-" when the zone ends in -1 and includes the number if not -1. Rack
is the portion of the availability zone name following the last "-".
** us-west-1a => dc: us-west, rack: 1a
** us-west-2b => dc: us-west-2, rack: 2b;
* *full* : datacenter is the part of the availability zone name preceding zone
letter. rack is the entire availability zone name.
** us-west-1a => dc: us-west-1, rack: us-west-1a
** us-west-2b => dc: us-west-2, rack: us-west-2b;
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