Status

Current state: [One of "Under Discussion", "Accepted", "Rejected"]

Discussion thread: here [Change the link from the KIP proposal email archive to your own email thread]

JIRA: here

Released: 2.1.0

Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).

Motivation

Describe the problems you are trying to solve.

Public Interfaces

Briefly list any new interfaces that will be introduced as part of this proposal or any existing interfaces that will be removed or changed. The purpose of this section is to concisely call out the public contract that will come along with this feature.

A public interface is any change to the following:

• Binary log format

• The network protocol and api behavior

• Any class in the public packages under clientsConfiguration, especially client configuration

  • org/apache/kafka/common/serialization

  • org/apache/kafka/common

  • org/apache/kafka/common/errors

  • org/apache/kafka/clients/producer

  • org/apache/kafka/clients/consumer (eventually, once stable)

• Monitoring

• Command line tools and arguments

• Anything else that will likely break existing users in some way when they upgrade

Proposed Changes

KIP-226 added support for dynamic update of  broker configuration.  In this KIP, we propose to extend the support to dynamic update of max.connections.per.ip/max.connections.per.ip.overrides configs. This will be useful  in the situations where a particular host (or set of hosts) is causing some trouble for the brokers.  Administrators can dynamically update these configs to restrict the connections coming from faulty hosts (or)  enable connections only from allowed hosts.

Proposed Changes

Use case: To restrict the connections coming from faulty clients/hosts  (or) to configure IP-based filtering of incoming connections (max.connections.per.ip  = 0 and valid max.connections.per.ip.overrides config value)

Config scope: Default for whole cluster (/configs/brokers/<default>)

Config options:

max.connections.per.ip
max.connections.per.ip.overrides

Dynamic update changes:

SocketServer ConnectionQuotas will be updated with the new values. Existing connections will not be affected, restrictions will be applied on
new connection creationsDescribe the new thing you want to do in appropriate detail. This may be fairly extensive and have large subsections of its own. Or it may be a few sentences. Use judgement based on the scope of the change.

Compatibility, Deprecation, and Migration Plan

• What impact (if any) will there be There won't be any impact on existing users?
• If we are changing behavior how will we phase out the older behavior?
• If we need special migration tools, describe them here.
• .
• There won't be any change of current behavior.
• No migration tool requiredWhen will we remove the existing behavior?

Rejected Alternatives