如何在融合的 kafka docker 安装中安装自定义 SMT?
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【中文标题】如何在融合的 kafka docker 安装中安装自定义 SMT?【英文标题】:How to install a custom SMT in confluent kafka docker installation? 【发布时间】:2021-09-09 09:35:16 【问题描述】:我正在尝试在 mysql 和 elasticsearch 之间进行事件流传输,我遇到的一个问题是 mysql 中的 JSON 对象在传输到 elasticsearch 时是 JSON 字符串格式而不是对象。
我正在寻找使用 SMT 的解决方案,我找到了这个,
https://github.com/RedHatInsights/expandjsonsmt
我不知道如何在我的 kafka 中安装或加载或连接容器
这是我的 docker-compose 文件,
---
version: '2'
services:
zookeeper:
image: confluentinc/cp-zookeeper:6.2.0
hostname: zookeeper
container_name: zookeeper
ports:
- "2181:2181"
environment:
ZOOKEEPER_CLIENT_PORT: 2181
ZOOKEEPER_TICK_TIME: 2000
mem_limit: 1024m
mem_reservation: 256m
cpus: 3.0
broker:
image: confluentinc/cp-server:6.2.0
hostname: broker
container_name: broker
depends_on:
- zookeeper
ports:
- "9092:9092"
- "9101:9101"
environment:
KAFKA_BROKER_ID: 1
KAFKA_ZOOKEEPER_CONNECT: 'zookeeper:2181'
KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://broker:29092,PLAINTEXT_HOST://localhost:9092
KAFKA_METRIC_REPORTERS: io.confluent.metrics.reporter.ConfluentMetricsReporter
KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0
KAFKA_CONFLUENT_LICENSE_TOPIC_REPLICATION_FACTOR: 1
KAFKA_CONFLUENT_BALANCER_TOPIC_REPLICATION_FACTOR: 1
KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
KAFKA_JMX_PORT: 9101
KAFKA_JMX_HOSTNAME: localhost
KAFKA_CONFLUENT_SCHEMA_REGISTRY_URL: http://schema-registry:8081
CONFLUENT_METRICS_REPORTER_BOOTSTRAP_SERVERS: broker:29092
CONFLUENT_METRICS_REPORTER_TOPIC_REPLICAS: 1
CONFLUENT_METRICS_ENABLE: 'true'
CONFLUENT_SUPPORT_CUSTOMER_ID: 'anonymous'
mem_limit: 2048m
mem_reservation: 256m
cpus: 3.0
schema-registry:
image: confluentinc/cp-schema-registry:6.2.0
hostname: schema-registry
container_name: schema-registry
depends_on:
- broker
ports:
- "8081:8081"
environment:
SCHEMA_REGISTRY_HOST_NAME: schema-registry
SCHEMA_REGISTRY_KAFKASTORE_BOOTSTRAP_SERVERS: 'broker:29092'
SCHEMA_REGISTRY_LISTENERS: http://0.0.0.0:8081
mem_limit: 256m
mem_reservation: 128m
cpus: 3.0
connect:
image: confluentinc/kafka-connect-datagen:latest
build:
context: .
dockerfile: Dockerfile
extra_hosts:
host.docker.internal: host-gateway
extra_hosts:
- "host.docker.internal:host-gateway"
hostname: connect
container_name: connect
depends_on:
- broker
- schema-registry
ports:
- "8083:8083"
environment:
CONNECT_BOOTSTRAP_SERVERS: 'broker:29092'
CONNECT_REST_ADVERTISED_HOST_NAME: connect
CONNECT_REST_PORT: 8083
CONNECT_GROUP_ID: compose-connect-group
CONNECT_CONFIG_STORAGE_TOPIC: docker-connect-configs
CONNECT_CONFIG_STORAGE_REPLICATION_FACTOR: 1
CONNECT_OFFSET_FLUSH_INTERVAL_MS: 10000
CONNECT_OFFSET_STORAGE_TOPIC: docker-connect-offsets
CONNECT_OFFSET_STORAGE_REPLICATION_FACTOR: 1
CONNECT_STATUS_STORAGE_TOPIC: docker-connect-status
CONNECT_STATUS_STORAGE_REPLICATION_FACTOR: 1
CONNECT_KEY_CONVERTER: org.apache.kafka.connect.storage.StringConverter
CONNECT_VALUE_CONVERTER: io.confluent.connect.avro.AvroConverter
CONNECT_VALUE_CONVERTER_SCHEMA_REGISTRY_URL: http://schema-registry:8081
# CLASSPATH required due to CC-2422
CLASSPATH: /usr/share/java/monitoring-interceptors/monitoring-interceptors-6.2.0.jar
CONNECT_PRODUCER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringProducerInterceptor"
CONNECT_CONSUMER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringConsumerInterceptor"
CONNECT_PLUGIN_PATH: "/usr/share/java,/usr/share/confluent-hub-components"
CONNECT_LOG4J_LOGGERS: org.apache.zookeeper=ERROR,org.I0Itec.zkclient=ERROR,org.reflections=ERROR
mem_limit: 1024m
mem_reservation: 256m
cpus: 3.0
control-center:
image: confluentinc/cp-enterprise-control-center:6.2.0
hostname: control-center
container_name: control-center
depends_on:
- broker
- schema-registry
- connect
ports:
- "9021:9021"
environment:
CONTROL_CENTER_BOOTSTRAP_SERVERS: 'broker:29092'
CONTROL_CENTER_CONNECT_CONNECT-DEFAULT_CLUSTER: 'connect:8083'
CONTROL_CENTER_SCHEMA_REGISTRY_URL: "http://schema-registry:8081"
CONTROL_CENTER_REPLICATION_FACTOR: 1
CONTROL_CENTER_INTERNAL_TOPICS_PARTITIONS: 1
CONTROL_CENTER_MONITORING_INTERCEPTOR_TOPIC_PARTITIONS: 1
CONFLUENT_METRICS_TOPIC_REPLICATION: 1
PORT: 9021
mem_limit: 512m
mem_reservation: 256m
cpus: 3.0
rest-proxy:
image: confluentinc/cp-kafka-rest:6.2.0
depends_on:
- broker
- schema-registry
ports:
- 8082:8082
hostname: rest-proxy
container_name: rest-proxy
environment:
KAFKA_REST_HOST_NAME: rest-proxy
KAFKA_REST_BOOTSTRAP_SERVERS: 'broker:29092'
KAFKA_REST_LISTENERS: "http://0.0.0.0:8082"
KAFKA_REST_SCHEMA_REGISTRY_URL: 'http://schema-registry:8081'
mem_limit: 256m
mem_reservation: 256m
cpus: 3.0
这是我的融合 kafka 连接,Dockerfile
FROM confluentinc/cp-kafka-connect-base:6.2.0
RUN confluent-hub install --no-prompt mongodb/kafka-connect-mongodb:1.5.1 \
&& confluent-hub install --no-prompt debezium/debezium-connector-mysql:1.5.0 \
&& confluent-hub install --no-prompt confluentinc/kafka-connect-jdbc:10.2.0 \
&& confluent-hub install --no-prompt debezium/debezium-connector-mongodb:1.5.0 \
&& confluent-hub install --no-prompt confluentinc/kafka-connect-elasticsearch:11.0.6 \
&& confluent-hub install --no-prompt confluentinc/kafka-connect-jdbc:10.2.0 \
&& confluent-hub install --no-prompt confluentinc/connect-transforms:latest
我尝试在 confluent kafka connect 的 Dockerfile 中添加这一行,就像在那个 github 自述文件中提到的那样
COPY ./kafka-connect-smt-expandjsonsmt-0.0.7-assemble-all.jar $KAFKA_CONNECT_PLUGINS_DIR
它不起作用,因为KAFKA_CONNECT_PLUGINS_DIR
是空的我尝试echo $KAFKA_CONNECT_PLUGINS_DIR
来验证它。
谁能帮助我如何将这个自定义 SMT 安装到我的 docker 安装的 kafka 中?
【问题讨论】:
【参考方案1】:该连接器也存在于集线器上
confluent-hub install redhatinsights/expandjsonsmt:0.0.7
https://www.confluent.io/hub/redhatinsights/expandjsonsmt
【讨论】:
非常感谢,当我尝试将 jar 文件复制到插件路径时,它不起作用,但从 confluent-hub 安装它是有效的。似乎在进行自定义安装时,我必须进行一些其他配置才能使其正常工作。enviromment
提供给 compose 的值在容器构建时不可用,因此问题中的 COPY 命令不起作用,不。否则,另一个答案是正确的,因为如果不是胖 JAR,您需要将该 JAR 和任何需要的依赖项复制到插件路径下自己的文件夹中【参考方案2】:
安装 SMT 就像安装其他连接器一样,
将您的自定义 SMT JAR 文件(以及转换所需的任何非 Kafka JAR 文件)复制到 Connect worker 配置中 plugin.path 属性中列出的目录之一下的目录中 –
在你的情况下复制到/usr/share/confluent-hub-components
【讨论】:
我应该将.jar文件单独复制到“CONNECT_PLUGIN_PATH”还是在CONNECT_PLUGIN_PATH中创建一个文件夹然后复制.jar文件? docs.confluent.io/platform/current/connect/transforms/… 将您的自定义 SMT JAR 文件(以及转换所需的任何非 Kafka JAR 文件)复制到 Connect worker 配置中 plugin.path 属性中列出的目录之一下的目录中以上是关于如何在融合的 kafka docker 安装中安装自定义 SMT?的主要内容,如果未能解决你的问题,请参考以下文章