【DevDojo】15分钟完成 · Kafka集群手把手搭建超详细教程
3. kafka cluter test
3.1 confluentinc/cp-kafka
3.1.1 install docker
需要先安装好docker
docker pull confluentinc/cp-kafka
docker pull confluentinc/cp-zookeeper
3.1.2 docker-compose file
因为只是一个基础的测试, 关于broker其他的参数就省略不设置了, 后续后机会可以再讲讲
---
version: '2'
services:
cp-zookeeper-1:
user: root
restart: always
container_name: cp-zookeeper-1
image: confluentinc/cp-zookeeper:latest
environment:
ZOOKEEPER_CLIENT_PORT: 2181
ZOOKEEPER_TICK_TIME: 2000
ports:
- 22181:2181
cp-zookeeper-2:
user: root
restart: always
container_name: cp-zookeeper-2
image: confluentinc/cp-zookeeper:latest
environment:
ZOOKEEPER_CLIENT_PORT: 2181
ZOOKEEPER_TICK_TIME: 2000
ports:
- 32181:2181
cp-zookeeper-3:
user: root
restart: always
container_name: cp-zookeeper-3
image: confluentinc/cp-zookeeper:latest
environment:
ZOOKEEPER_CLIENT_PORT: 2181
ZOOKEEPER_TICK_TIME: 2000
ports:
- 42181:2181
kafka-1:
user: root
restart: always
container_name: kafka-1
image: confluentinc/cp-kafka:latest
depends_on:
- cp-zookeeper-1
- cp-zookeeper-2
- cp-zookeeper-3
ports:
- 29092:29092
environment:
KAFKA_BROKER_ID: 1
KAFKA_ZOOKEEPER_CONNECT: cp-zookeeper-1:2181,cp-zookeeper-2:2181,cp-zookeeper-3:2181/kafkas-a
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka-1:9092,PLAINTEXT_HOST://localhost:29092
KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
kafka-2:
user: root
restart: always
container_name: kafka-2
image: confluentinc/cp-kafka:latest
depends_on:
- cp-zookeeper-1
- cp-zookeeper-2
- cp-zookeeper-3
ports:
- 39092:39092
environment:
KAFKA_BROKER_ID: 2
KAFKA_ZOOKEEPER_CONNECT: cp-zookeeper-1:2181,cp-zookeeper-2:2181,cp-zookeeper-3:2181/kafkas-a
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka-2:9092,PLAINTEXT_HOST://localhost:39092
KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
kafka-3:
user: root
restart: always
container_name: kafka-3
image: confluentinc/cp-kafka:latest
depends_on:
- cp-zookeeper-1
- cp-zookeeper-2
- cp-zookeeper-3
ports:
- 49092:39092
environment:
KAFKA_BROKER_ID: 3
KAFKA_ZOOKEEPER_CONNECT: cp-zookeeper-1:2181,cp-zookeeper-2:2181,cp-zookeeper-3:2181/kafkas-a
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka-3:9092,PLAINTEXT_HOST://localhost:39092
KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
3.1.3 start docker cluster
$ docker-compose -f docker_compose_cp-kafka-cluster.yaml up -d
[+] Running 6/6
⠿ Container cp-zookeeper-2 Started 0.4s
⠿ Container cp-zookeeper-1 Started 0.4s
⠿ Container cp-zookeeper-3 Started 0.4s
⠿ Container kafka-2 Started 0.5s
⠿ Container kafka-1 Started 0.7s
⠿ Container kafka-3 Started
3.1.4 go test demo
使用到的库链接:go-utils
config in yaml
Kafka: localhost:29092,localhost:39092,localhost:49092 #for cp/kafka
code main body
const (
TopicCoinOption = "coinOption" // charge, add, decrease
TopicFlowFlow = "followFlow" // follow, unfollow
)
func TestKafkaConsumerGroup(t *testing.T) {
// Producer
go func() {
var syncProducer sarama.SyncProducer
syncProducer = gkafka.InitSyncProducer(gkafka.Hosts(strings.Split(GetKafkaConfig().Kafka, ",")))
logrus.Infof("init kafka host:%v", GetKafkaConfig().Kafka)
tick := time.Tick(1 * time.Second)
ctx, cancel := context.WithCancel(context.Background())
gexit.Close(cancel)
Loop:
for {
select {
case <-tick:
uu, _ := uuid.GenerateUUID()
sid := algorithms.Snowflake.NextOptStreamID()
var msg *UserCoinOption = &UserCoinOption{
Header: gkafka.Header{
SeqID: gcast.ToString(sid),
TraceID: fmt.Sprintf("%v.%v", uu, ginfos.FuncName()),
CorrelationID: uu,
Topic: TopicCoinOption,
ContentType: gkafka.ContentTypeJSON,
Key: gkafka.KeyInfo{
KeyType: gkafka.KeyTypeProductID,
KeyContent: "my_app",
},
Source: ginfos.Runtime.IP(),
Timestamp: time.Now().Unix(),
},
SID: sid,
UID: 123456,
Type: 100,
Amount: int64(1) + rand.Int63()%99,
Balance: 100,
}
if err := gkafka.PublishSyncMessage(syncProducer, TopicCoinOption, msg); err != nil {
logrus.Errorf("publish error|msg=%v, err:%v", msg, err)
} else {
logrus.Infof("[producer]push ok|msg=%v", msg)
}
case <-ctx.Done():
logrus.Errorf("publish error")
break Loop
}
}
}()
// Consumer
go func() {
gkafka.InitKafkaConsumerGroup(gkafka.Hosts(strings.Split(GetKafkaConfig().Kafka, ",")),
gkafka.Retry(true),
gkafka.Topics(
TopicCoinOption,
TopicFlowFlow,
),
gkafka.Handler(kafkaHander))
}()
gexit.Wait()
}
func kafkaHander(ctx context.Context, consumerMsg *sarama.ConsumerMessage) (err error) {
switch consumerMsg.Topic {
case TopicCoinOption:
err = handleCoinOption(ctx, consumerMsg.Value)
case TopicFlowFlow:
default:
logrus.Warningf("unknown topic:%v,msg:%v", consumerMsg.Topic, consumerMsg.Value)
}
return nil
}
type UserCoinOption struct {
gkafka.Header
SID int64 `json:"sid"`
UID int64 `json:"uid"`
Type int64 `json:"type"`
Amount int64 `json:"amount"`
Balance int64 `json:"balance"`
}
func (msg *UserCoinOption) RandMarshal() (err error) {
msg = &UserCoinOption{}
uu, _ := uuid.GenerateUUID()
msg.Header = gkafka.Header{
SeqID: gcast.ToString(algorithms.Snowflake.NextOptStreamID()),
TraceID: fmt.Sprintf("%v.%v", uu, ginfos.FuncName()),
CorrelationID: uu,
Topic: TopicCoinOption,
ContentType: gkafka.ContentTypeJSON,
Key: gkafka.KeyInfo{},
Source: ginfos.Runtime.IP(),
Timestamp: time.Now().Unix(),
}
return nil
}
func (msg *UserCoinOption) Unmarshal(b []byte) (err error) {
err = json.Unmarshal(b, msg)
return err
}
func handleCoinOption(ctx context.Context, b []byte) (err error) {
var msg *UserCoinOption = &UserCoinOption{}
err = msg.Unmarshal(b)
if err != nil {
logrus.Errorf("unmarshal err:%v", b)
return err
}
logrus.Infof("[consumer]marshal ok:%v", msg)
return nil
}
3.1.5 result
15039-03-15 10:36:11.291 [/Users/xxx/mod/gomod/pkg/mod/github.com/aipave/[email protected]/gkafka/producer_with_sync.go:67 gkafka.PublishSyncMessage] [INFO] send message success, topic:coinOption partition:0 offset:688 value:{"id":"1635832233163300864","traceID":"3340cb86-464b-790f-92bc-f53a3057b6b1.func1","correlationID":"3340cb86-464b-790f-92bc-f53a3057b6b1","topic":"coinOption","contentType":"json","keyInfo":{"keyType":"key/product","keyContent":"my_app"},"version":"","source":"172.17.17.153","timestamp":1678847771,"sid":1635832233163300864,"uid":123456,"type":100,"amount":33,"balance":100}
15039-03-15 10:36:11.292 [/Users/xxx/mod/go-utils/test-example/gkafka_test.go:184 command-line-arguments.TestKafkaConsumerGroup.func1] [INFO] [producer]push ok|msg=&{{1635832233163300864 3340cb86-464b-790f-92bc-f53a3057b6b1.func1 3340cb86-464b-790f-92bc-f53a3057b6b1 coinOption json {key/product my_app} 172.17.17.153 1678847771} 1635832233163300864 123456 100 33 100}
15039-03-15 10:36:11.292 [/Users/xxx/mod/go-utils/test-example/gkafka_test.go:259 command-line-arguments.handleCoinOption] [INFO] [consumer]marshal ok:&{{1635832233163300864 3340cb86-464b-790f-92bc-f53a3057b6b1.func1 3340cb86-464b-790f-92bc-f53a3057b6b1 coinOption json {key/product my_app} 172.17.17.153 1678847771} 1635832233163300864 123456 100 33 100}
可以看到我们的kafka集群就搭建完毕了, 测试生产者消费者, 等等也可以通过了!
3.1.6 docker客户端界面图
3.2 bitnami/kafka:latest
3.2.1 docker compose yaml file
version: '3'
networks:
app-tier:
driver: bridge
external: true
services:
# When stopping the kafka cluster, be sure to wait until all node processes of kafka are stopped before stopping the zookeeper cluster. Because the kafka cluster related information is recorded in the zookeeper cluster, once the zookeeper cluster is stopped first,
# the kafka cluster has no way to obtain the information of the stopped process, and can only manually kill the kafka process
zookeeper-01:
user: root
image: 'bitnami/zookeeper:latest'
container_name: zookeeper-01
restart: always
hostname: zookeeper-01
ports:
- "2181:2181"
networks:
- app-tier
environment:
- ZOO_MY_ID=1
- ALLOW_ANONYMOUS_LOGIN=yes
- KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper-01:2181
- ZOOKEEPER_CLIENT_PORT=zookeeper-01:2181
- ZOO_SERVER=server.1=zookeeper-01:2888:3888;2181 server.2=zookeeper-02:2888:3888;2181 server.3=zookeeper-03:2888:3888;2181
zookeeper-02:
user: root
image: 'bitnami/zookeeper:latest'
container_name: zookeeper-02
restart: always
hostname: zookeeper-02
ports:
- "2182:2181"
networks:
- app-tier
environment:
- ZOO_MY_ID=2
- ALLOW_ANONYMOUS_LOGIN=yes
- KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper-02:2182
- ZOOKEEPER_CLIENT_PORT=zookeeper-02:2182
- ZOO_SERVER=server.1=zookeeper-01:2888:3888;2181 server.2=zookeeper-02:2888:3888;2181 server.3=zookeeper-03:2888:3888;2181
zookeeper-03:
user: root
image: 'bitnami/zookeeper:latest'
container_name: zookeeper-03
restart: always
hostname: zookeeper-03
ports:
- "2183:2181"
networks:
- app-tier
environment:
- ZOO_MY_ID=3
- ALLOW_ANONYMOUS_LOGIN=yes
- KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper-03:2183
- ZOOKEEPER_CLIENT_PORT=zookeeper-03:2183
- ZOO_SERVER=server.1=zookeeper-01:2888:3888;2181 server.2=zookeeper-02:2888:3888;2181 server.3=zookeeper-03:2888:3888;2181
kafka-01:
user: root
restart: always
container_name: kafka-01
hostname: kafka-01
image: 'bitnami/kafka:latest'
ports:
- '9092:9092'
networks:
- app-tier
environment:
- KAFKA_BROKER_ID=1
- ALLOW_PLAINTEXT_LISTENER=yes
- KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR=1
- KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper-01:2181,zookeeper-02:2182,zookeeper-03:2183/kafkas01
- KAFKA_CFG_LISTENERS=PLAINTEXT://:9092
- KAFKA_CFG_ADVERTISED_LISTENERS=PLAINTEXT://localhost:9092
depends_on:
- zookeeper-01
- zookeeper-02
- zookeeper-03
kafka-02:
user: root
restart: always
container_name: kafka-02
hostname: kafka-02
image: 'bitnami/kafka:latest'
ports:
- '9093:9092'
networks:
- app-tier
environment:
- KAFKA_BROKER_ID=2
- ALLOW_PLAINTEXT_LISTENER=yes
- KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR=1
- KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper-01:2181,zookeeper-02:2182,zookeeper-03:2183/kafkas01
- KAFKA_CFG_LISTENERS=PLAINTEXT://:9093
- KAFKA_CFG_ADVERTISED_LISTENERS=PLAINTEXT://localhost:9093
depends_on:
- zookeeper-01
- zookeeper-02
- zookeeper-03
kafka-03:
user: root
restart: always
container_name: kafka-03
hostname: kafka-03
image: 'bitnami/kafka:latest'
ports:
- '9094:9092'
networks:
- app-tier
environment:
- KAFKA_BROKER_ID=3
- ALLOW_PLAINTEXT_LISTENER=yes
- KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR=1
- KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper-01:2181,zookeeper-02:2182,zookeeper-03:2183/kafkas01
- KAFKA_CFG_LISTENERS=PLAINTEXT://:9094
- KAFKA_CFG_ADVERTISED_LISTENERS=PLAINTEXT://localhost:9094
depends_on:
- zookeeper-01
- zookeeper-02
- zookeeper-03
3.2.2
config:
[zk: localhost:2181(CONNECTED) 0] get /kafkas01/brokers/ids/1
{"listener_security_protocol_map":{"PLAINTEXT":"PLAINTEXT"},"endpoints":["PLAINTEXT://localhost:9092"],"jmx_port":-1,"features":{},"host":"localhost","timestamp":"1678864730406","port":9092,"version":5}
[zk: localhost:2181(CONNECTED) 1] get /kafkas01/brokers/ids/2
{"listener_security_protocol_map":{"PLAINTEXT":"PLAINTEXT"},"endpoints":["PLAINTEXT://localhost:9093"],"jmx_port":-1,"features":{},"host":"localhost","timestamp":"1678864730485","port":9093,"version":5}
[zk: localhost:2181(CONNECTED) 2] get /kafkas01/brokers/ids/3
{"listener_security_protocol_map":{"PLAINTEXT":"PLAINTEXT"},"endpoints":["PLAINTEXT://localhost:9094"],"jmx_port":-1,"features":{},"host":"localhost","timestamp":"1678864881743","port":9094,"version":5}
output:
15039-03-15 15:24:46.773 [/Users/xxxx/mod/gomod/pkg/mod/github.com/aipave/[email protected]/gkafka/producer_with_sync.go:67 gkafka.PublishSyncMessage] [INFO] send message success, topic:coinOption partition:0 offset:297 value:{"id":"1635904859353194496","traceID":"e39c914b-a423-b0c1-29bc-48857ef636b9.func1","correlationID":"e39c914b-a423-b0c1-29bc-48857ef636b9","topic":"coinOption","contentType":"json","keyInfo":{"keyType":"key/product","keyContent":"my_app"},"version":"","source":"172.17.17.153","timestamp":1678865086,"sid":1635904859353194496,"uid":123456,"type":100,"amount":14,"balance":100}
15039-03-15 15:24:46.773 [/Users/xxxx/mod/go-utils/test-example/gkafka_test.go:184 command-line-arguments.TestKafkaConsumerGroup.func1] [INFO] [producer]push ok|msg=&{{1635904859353194496 e39c914b-a423-b0c1-29bc-48857ef636b9.func1 e39c914b-a423-b0c1-29bc-48857ef636b9 coinOption json {key/product my_app} 172.17.17.153 1678865086} 1635904859353194496 123456 100 14 100}
15039-03-15 15:24:46.774 [/Users/xxxx/mod/go-utils/test-example/gkafka_test.go:259 command-line-arguments.handleCoinOption] [INFO] [consumer]marshal ok:&{{1635904859353194496 e39c914b-a423-b0c1-29bc-48857ef636b9.func1 e39c914b-a423-b0c1-29bc-48857ef636b9 coinOption json {key/product my_app} 172.17.17.153 1678865086} 1635904859353194496 123456 100 14 100}
3.2.3 listeners配置多个监听器,内外网分流
启动后的zookeeper配置:
[zk: localhost:2181(CONNECTED) 8] get /kafkas01/brokers/ids/1
{"listener_security_protocol_map":{"INTERNAL":"PLAINTEXT","EXTERNAL":"PLAINTEXT"},"endpoints":["INTERNAL://kafka-01:9092","EXTERNAL://localhost:19092"],"jmx_port":-1,"features":{},"host":"kafka-01","timestamp":"1678866631100","port":9092,"version":5}
[zk: localhost:2181(CONNECTED) 9] get /kafkas01/brokers/ids/2
{"listener_security_protocol_map":{"INTERNAL":"PLAINTEXT","EXTERNAL":"PLAINTEXT"},"endpoints":["INTERNAL://kafka-02:9093","EXTERNAL://localhost:19093"],"jmx_port":-1,"features":{},"host":"kafka-02","timestamp":"1678866631946","port":9093,"version":5}
[zk: localhost:2181(CONNECTED) 10] get /kafkas01/brokers/ids/3
{"listener_security_protocol_map":{"INTERNAL":"PLAINTEXT","EXTERNAL":"PLAINTEXT"},"endpoints":["INTERNAL://kafka-03:9094","EXTERNAL://localhost:19094"],"jmx_port":-1,"features":{},"host":"kafka-03","timestamp":"1678866632012","port":9094,"version":5}
version: '3'
networks:
app-tier:
driver: bridge
external: true
services:
zookeeper-01:
user: root
image: 'bitnami/zookeeper:latest'
container_name: zookeeper-01
restart: always
hostname: zookeeper-01
ports:
- "2181:2181"
networks:
- app-tier
environment:
- ZOO_MY_ID=1
- ALLOW_ANONYMOUS_LOGIN=yes
- KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper-01:2181
- ZOOKEEPER_CLIENT_PORT=zookeeper-01:2181
- ZOO_SERVER=server.1=zookeeper-01:2888:3888;2181 server.2=zookeeper-02:2888:3888;2181 server.3=zookeeper-03:2888:3888;2181
zookeeper-02:
user: root
image: 'bitnami/zookeeper:latest'
container_name: zookeeper-02
restart: always
hostname: zookeeper-02
ports:
- "2182:2181"
networks:
- app-tier
environment:
- ZOO_MY_ID=2
- ALLOW_ANONYMOUS_LOGIN=yes
- KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper-02:2182
- ZOOKEEPER_CLIENT_PORT=zookeeper-02:2182
- ZOO_SERVER=server.1=zookeeper-01:2888:3888;2181 server.2=zookeeper-02:2888:3888;2181 server.3=zookeeper-03:2888:3888;2181
zookeeper-03:
user: root
image: 'bitnami/zookeeper:latest'
container_name: zookeeper-03
restart: always
hostname: zookeeper-03
ports:
- "2183:2181"
networks:
- app-tier
environment:
- ZOO_MY_ID=3
- ALLOW_ANONYMOUS_LOGIN=yes
- KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper-03:2183
- ZOOKEEPER_CLIENT_PORT=zookeeper-03:2183
- ZOO_SERVER=server.1=zookeeper-01:2888:3888;2181 server.2=zookeeper-02:2888:3888;2181 server.3=zookeeper-03:2888:3888;2181
kafka-01:
user: root
restart: always
container_name: kafka-01
hostname: kafka-01
image: 'bitnami/kafka:latest'
ports:
- '9092:9092'
- '19092:19092'
networks:
- app-tier
environment:
- KAFKA_BROKER_ID=1
- ALLOW_PLAINTEXT_LISTENER=yes
- KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR=1
- KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper-01:2181,zookeeper-02:2182,zookeeper-03:2183/kafkas01
- KAFKA_CFG_INTER_BROKER_LISTENER_NAME=INTERNAL
- KAFKA_CFG_LISTENER_SECURITY_PROTOCOL_MAP=INTERNAL:PLAINTEXT,EXTERNAL:PLAINTEXT
- KAFKA_CFG_LISTENERS=INTERNAL://:9092,EXTERNAL://:19092
- KAFKA_CFG_ADVERTISED_LISTENERS=INTERNAL://kafka-01:9092,EXTERNAL://localhost:19092
depends_on:
- zookeeper-01
- zookeeper-02
- zookeeper-03
kafka-02:
user: root
restart: always
container_name: kafka-02
hostname: kafka-02
image: 'bitnami/kafka:latest'
ports:
- '9093:9092'
- '19093:19303'
networks:
- app-tier
environment:
- KAFKA_BROKER_ID=2
- ALLOW_PLAINTEXT_LISTENER=yes
- KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR=1
- KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper-01:2181,zookeeper-02:2182,zookeeper-03:2183/kafkas01
- KAFKA_CFG_INTER_BROKER_LISTENER_NAME=INTERNAL
- KAFKA_CFG_LISTENER_SECURITY_PROTOCOL_MAP=INTERNAL:PLAINTEXT,EXTERNAL:PLAINTEXT
- KAFKA_CFG_LISTENERS=INTERNAL://:9093,EXTERNAL://:19093
- KAFKA_CFG_ADVERTISED_LISTENERS=INTERNAL://kafka-02:9093,EXTERNAL://localhost:19093
depends_on:
- zookeeper-01
- zookeeper-02
- zookeeper-03
kafka-03:
user: root
restart: always
container_name: kafka-03
hostname: kafka-03
image: 'bitnami/kafka:latest'
ports:
- '9094:9092'
- '19094:19094'
networks:
- app-tier
environment:
- KAFKA_BROKER_ID=3
- ALLOW_PLAINTEXT_LISTENER=yes
- KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR=1
- KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper-01:2181,zookeeper-02:2182,zookeeper-03:2183/kafkas01
- KAFKA_CFG_INTER_BROKER_LISTENER_NAME=INTERNAL
- KAFKA_CFG_LISTENER_SECURITY_PROTOCOL_MAP=INTERNAL:PLAINTEXT,EXTERNAL:PLAINTEXT
- KAFKA_CFG_LISTENERS=INTERNAL://:9094,EXTERNAL://:19094
- KAFKA_CFG_ADVERTISED_LISTENERS=INTERNAL://kafka-03:9094,EXTERNAL://localhost:19094
depends_on:
- zookeeper-01
- zookeeper-02
- zookeeper-03
yaml config for 内网
Kafka: localhost:9092,localhost:9093,localhost:9094
yaml config for 外网
Kafka: localhost:19092,localhost:19093,localhost:19094