listeners=SASL_PLAINTEXT://localhost:9092
security.inter.broker.protocol=SASL_PLAINTEXT
sasl.mechanism.inter.broker.protocol=SCRAM-SHA-512
sasl.enabled.mechanisms=SCRAM-SHA-512

listeners=SASL_PLAINTEXT://localhost:9092
security.inter.broker.protocol=SASL_PLAINTEXT
sasl.mechanism.inter.broker.protocol=PLAIN
sasl.enabled.mechanisms=PLAIN

--kafka.producer.plaintext.mechanism string      The plaintext Mechanism for SASL/PLAIN authentication, e.g. 'SCRAM-SHA-256' or 'SCRAM-SHA-512' or 'PLAIN' (default "PLAIN")

--kafka.consumer.plaintext.mechanism string      The plaintext Mechanism for SASL/PLAIN authentication, e.g. 'SCRAM-SHA-256' or 'SCRAM-SHA-512' or 'PLAIN' (default "PLAIN")

$ jaeger-collector --kafka.producer.brokers "127.0.0.1:9092" --kafka.producer.authentication "plaintext" --kafka.producer.topic jaeger-spans --kafka.producer.plaintext.username user --kafka.producer.plaintext.password password

{"level":"info","ts":1610422257.2999601,"caller":"flags/service.go:116","msg":"Mounting metrics handler on admin server","route":"/metrics"}
{"level":"info","ts":1610422257.3010602,"caller":"flags/admin.go:120","msg":"Mounting health check on admin server","route":"/"}
{"level":"info","ts":1610422257.301121,"caller":"flags/admin.go:126","msg":"Starting admin HTTP server","http-addr":":14269"}
{"level":"info","ts":1610422257.301137,"caller":"flags/admin.go:112","msg":"Admin server started","http.host-port":"[::]:14269","health-status":"unavailable"}
{"level":"info","ts":1610422257.304835,"caller":"kafka/factory.go:69","msg":"Kafka factory","producer builder":{"Brokers":["127.0.0.1:9092"],"RequiredAcks":1,"Compression":0,"CompressionLevel":0,"ProtocolVersion":"","BatchLinger":0,"BatchSize":0,"BatchMinMessages":0,"BatchMaxMessages":0,"Authentication":"plaintext","Kerberos":{"ServiceName":"kafka","Realm":"","UseKeyTab":false,"Username":"","ConfigPath":"/etc/krb5.conf","KeyTabPath":"/etc/security/kafka.keytab"},"TLS":{"Enabled":false,"CAPath":"","CertPath":"","KeyPath":"","ServerName":"","ClientCAPath":"","SkipHostVerify":false},"PlainText":{"UserName":"user"}},"topic":"jaeger-spans"}
{"level":"fatal","ts":1610422258.0719209,"caller":"command-line-arguments/main.go:70","msg":"Failed to init storage factory","error":"kafka: client has run out of available brokers to talk to (Is your cluster reachable?)","stacktrace":"main.main.func1\n\tcommand-line-arguments/main.go:70\ngithub.com/spf13/cobra.(*Command).execute\n\tgithub.com/spf13/cobra@v0.0.3/command.go:762\ngithub.com/spf13/cobra.(*Command).ExecuteC\n\tgithub.com/spf13/cobra@v0.0.3/command.go:852\ngithub.com/spf13/cobra.(*Command).Execute\n\tgithub.com/spf13/cobra@v0.0.3/command.go:800\nmain.main\n\tcommand-line-arguments/main.go:129\nruntime.main\n\truntime/proc.go:204"}