docker-compose 安装kafka和可视化管理界面
version: "2.2"
services:
zookeeper:
image: bitnami/zookeeper:latest
restart: always
ports:
- 2181:2181
environment:
- ALLOW_ANONYMOUS_LOGIN=yes
volumes:
- /Users/cc/docker/kafka/zookeeper:/bitnami/zookeeper
- /etc/localtime:/etc/localtime:ro
cpus: '1'
mem_limit: 500m
container_name: zookeeper
kafka:
image: wurstmeister/kafka
restart: always
container_name: kafka
hostname: kafka
ports:
- "9092:9092"
environment:
KAFKA_BROKER_ID: 1
KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9092
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://192.168.0.195:9092
KAFKA_ADVERTISED_HOST_NAME: kafka1
KAFKA_ADVERTISED_PORT: 9092
KAFKA_ZOOKEEPER_CONNECT: "zookeeper:2181"
volumes:
- "./kafka/data/:/kafka"
- /etc/localtime:/etc/localtime:ro
cpus: '2'
mem_limit: 2048m
depends_on:
- zookeeper
kafdrop:
image: obsidiandynamics/kafdrop
restart: always
ports:
- "9000:9000"
environment:
KAFKA_BROKERCONNECT: "kafka1:9092"
depends_on:
- zookeeper
- kafka
cpus: '1'
mem_limit: 1024m
container_name: kafdrop
docker-compose up -d
sarama
Go语言中连接kafka使用第三方库: github.com/Shopify/sarama。
生产者
func sendMsg() {
config := sarama.NewConfig()
config.Producer.RequiredAcks = sarama.WaitForAll
config.Producer.Partitioner = sarama.NewRandomPartitioner
config.Producer.Return.Successes = true
msg := &sarama.ProducerMessage{
Topic: "test_log",
Value: sarama.StringEncoder("this is a test log"),
}
client, err := sarama.NewSyncProducer([]string{"127.0.0.1:9092"}, config)
if err != nil {
fmt.Println("send msg failed, err:", err)
return
}
defer client.Close()
pid, offset, err := client.SendMessage(msg)
if err != nil {
fmt.Println("send msg failed, err:", err)
return
}
fmt.Printf("pid: %v offset:%v\n", pid, offset)
}
消费者
func consumerMsg() {
consumer, err := sarama.NewConsumer([]string{"127.0.0.1:9092"}, nil)
if err != nil {
fmt.Printf("fail to start consumer, err:%v\n", err)
return
}
partitionList, err := consumer.Partitions("web_log") // 根据topic取到所有的分区
if err != nil {
fmt.Printf("fail to get list of partition:err%v\n", err)
return
}
fmt.Println(partitionList)
for partition := range partitionList { // 遍历所有的分区
// 针对每个分区创建一个对应的分区消费者
pc, err := consumer.ConsumePartition("test_log", int32(partition), sarama.OffsetNewest)
if err != nil {
fmt.Printf("failed to start consumer for partition %d,err:%v\n", partition, err)
return
}
defer pc.AsyncClose()
// 异步从每个分区消费信息
go func(sarama.PartitionConsumer) {
for msg := range pc.Messages() {
fmt.Printf("Partition:%d Offset:%d Key:%v Value:%v", msg.Partition, msg.Offset, msg.Key, msg.Value)
}
}(pc)
}
}