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https://issues.apache.org/jira/browse/KAFKA-13055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17378655#comment-17378655
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Alexey Kashavkin edited comment on KAFKA-13055 at 7/11/21, 1:20 PM:
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{code:bash}
listener.name.clients.scram-sha-256.sasl.jaas.config=org.apache.kafka.common.security.scram.ScramLoginModule
required \
username="alice" \
password="alice-secret";
--
listener.name.clients-nossl.scram-sha-256.sasl.jaas.config=org.apache.kafka.common.security.scram.ScramLoginModule
required \
username="alice" \
password="alice-secret";
{code}
For experiment, I specified user alice in sasl.jaas.config, but I didn't create
this user and Kafka starts correctly. What is the logic of this?
was (Author: alexey.kashavkin):
{code:bash}
listener.name.clients.scram-sha-256.sasl.jaas.config=org.apache.kafka.common.security.scram.ScramLoginModule
required \
username="alice" \
password="alice-secret";
--
listener.name.clients-nossl.scram-sha-256.sasl.jaas.config=org.apache.kafka.common.security.scram.ScramLoginModule
required \
username="alice" \
password="alice-secret";
{code}
For experiment, I specified user alice in sasl.jaas.config, but I didn't create
this user and Kafka works correctly. What is the logic of this?
> Security without JAAS configuration
> -----------------------------------
>
> Key: KAFKA-13055
> URL: https://issues.apache.org/jira/browse/KAFKA-13055
> Project: Kafka
> Issue Type: Bug
> Components: security
> Affects Versions: 2.8.0
> Reporter: Alexey Kashavkin
> Priority: Major
>
> I'm setting up kafka security with multiple listeners. Listener for broker
> works as plaintext and I don't want to use authentication for them. My
> cluster has configuration:
> {code:bash}
> listeners=BROKERS://:9091,CLIENTS://:9092,CLIENTS-NOSSL://:9093
> inter.broker.listener.name=BROKERS
> sasl.enabled.mechanisms=SCRAM-SHA-256
> listener.security.protocol.map=BROKERS:PLAINTEXT,CLIENTS:SASL_SSL,CLIENTS-NOSSL:SASL_PLAINTEXT
> {code}
> For clients, I want use SCRAM and only for them (not for brokers). But when I
> start broker, I see following message in log:
> {code:bash}
> ERROR [KafkaServer id=0] Fatal error during KafkaServer startup. Prepare to
> shutdown (kafka.server.KafkaServer)
> java.lang.IllegalArgumentException: Could not find a 'KafkaServer' or
> 'clients.KafkaServer' entry in the JAAS configuration. System property
> 'java.security.auth.login.config' is not set
> {code}
> Why is this configuration so necessary, if I don't use authentication for
> brokers and SCRAM mechanism stores credentials in zookeeper? Which user do I
> need to add to {{sasl.jaas.config}}? I have created users who perform
> operations as consumers and producers. I didn't create any admin users
> because I don't need it. I didn't find any more detailed information in
> [docs|http://kafka.apache.org/documentation/#security] about why this is so
> necessary.
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