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https://issues.apache.org/jira/browse/CASSANDRA-14361?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ben Bromhead updated CASSANDRA-14361:
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Comment: was deleted
(was: Currently SimpleSeedProvider can accept a comma separated string of IPs
or hostnames as the set of Cassandra seeds. hostnames are resolved via
InetAddress.getByName, which will only return the first IP associated with an
A, AAAA or CNAME record.
By changing to InetAddress.getAllByName, existing behavior is preserved, but
now Cassandra can discover multiple IP address per record, allowing seed
discovery by DNS to be a little easier.
Some examples of improved workflows with this change include:
* specify the DNS name of a headless service in Kubernetes which will resolve
to all IP addresses of pods within that service.
* seed discovery for multi-region clusters via AWS route53, AzureDNS etc
* Other common DNS service discovery mechanisms.
The only behavior this is likely to impact would be where users are relying on
the fact that getByName only returns a single IP address.
I can't imagine any scenario where that is a sane choice. Even when that choice
has been made, it only impacts the first startup of Cassandra and would not be
on any critical path.
)
> Allow SimpleSeedProvider to resolve multiple IPs per DNS name
> -------------------------------------------------------------
>
> Key: CASSANDRA-14361
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14361
> Project: Cassandra
> Issue Type: Improvement
> Components: Configuration
> Reporter: Ben Bromhead
> Assignee: Ben Bromhead
> Priority: Minor
> Fix For: 4.0
>
>
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