├── kafka-ssl ├── .env ├── stop-cluster.sh ├── security │ ├── remove-certs.sh │ ├── create-pem-certificate.sh │ ├── create-jks-certificate.sh │ └── create-certificates.sh ├── start-cluster.sh ├── README.md └── docker-compose.yml ├── single-node-kafka ├── .env └── docker-compose.yml ├── single-node-avro-kafka ├── .env └── docker-compose.yml ├── .gitignore ├── README.md └── LICENSE /kafka-ssl/.env: -------------------------------------------------------------------------------- 1 | CP_VERSION=7.5.2 2 | -------------------------------------------------------------------------------- /single-node-kafka/.env: -------------------------------------------------------------------------------- 1 | CP_VERSION=7.5.2 2 | -------------------------------------------------------------------------------- /single-node-avro-kafka/.env: -------------------------------------------------------------------------------- 1 | CP_VERSION=7.5.2 2 | -------------------------------------------------------------------------------- /kafka-ssl/stop-cluster.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | docker-compose down 4 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | *.crt 2 | *.cer 3 | *.csr 4 | *.srl 5 | *.key 6 | credentials 7 | *.jks 8 | consumer.properties 9 | producer.properties 10 | *-keypair.pem 11 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Kafka in Docker 2 | Examples of running Kafka and elements of Confluent Platform in docker using Docker Compose. 3 | 4 | This repository is heavily inspired by examples in: https://github.com/confluentinc/cp-docker-images 5 | -------------------------------------------------------------------------------- /kafka-ssl/security/remove-certs.sh: -------------------------------------------------------------------------------- 1 | #! /bin/bash 2 | 3 | DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )" 4 | 5 | cd $DIR && rm root.crt root.key consumer.properties producer.properties credentials truststore.jks 6 | 7 | for i in broker zookeeper producer consumer 8 | do 9 | rm $i-signed.crt $i.key $i.csr $i-keypair.pem 10 | done 11 | -------------------------------------------------------------------------------- /kafka-ssl/start-cluster.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | set -o allexport 4 | source .env set 5 | set +o allexport 6 | 7 | if [[ ! -f "security/root.crt" ]]; then 8 | DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )" 9 | 10 | # create certificates if they don't exist 11 | cd $DIR/security && ./create-certificates.sh 12 | fi 13 | 14 | echo 15 | docker-compose up -d 16 | -------------------------------------------------------------------------------- /kafka-ssl/README.md: -------------------------------------------------------------------------------- 1 | # Kafka SSL example using PEM certificates 2 | 3 | > Read the whole tutorial: https://codingharbour.com/apache-kafka/using-pem-certificates-with-apache-kafka/ 4 | 5 | To start the cluster execute `./start-cluster.sh` 6 | 7 | This will generate the root certificate as well as private keys and certificates for: 8 | - broker 9 | - zookeeper 10 | - producer 11 | - consumer 12 | 13 | It will also create a `producer.properties` and `consumer.properties` files to be used with `kafka-console-*` CLI tools. 14 | -------------------------------------------------------------------------------- /kafka-ssl/security/create-pem-certificate.sh: -------------------------------------------------------------------------------- 1 | #! /bin/bash 2 | 3 | certname=$1 4 | password=codingharbour 5 | 6 | openssl req -newkey \ 7 | rsa:2048 \ 8 | -keyout $certname.key \ 9 | -out $certname.csr \ 10 | -passin pass:$password \ 11 | -passout pass:$password \ 12 | -subj "/CN=$certname/OU=TEST/O=CodingHarbour/L=Oslo/C=NO" 13 | 14 | #convert the key to PKCS8, otherwise kafka/java cannot read it 15 | openssl pkcs8 \ 16 | -topk8 \ 17 | -in $certname.key \ 18 | -inform pem \ 19 | -v1 PBE-SHA1-RC4-128 \ 20 | -out $certname-pkcs8.key \ 21 | -outform pem \ 22 | -passin pass:$password \ 23 | -passout pass:$password 24 | 25 | mv $certname-pkcs8.key $certname.key 26 | 27 | # Sign the CSR with the root CA 28 | openssl x509 -req \ 29 | -CA root.crt \ 30 | -CAkey root.key \ 31 | -in $certname.csr \ 32 | -out $certname-signed.crt \ 33 | -sha256 \ 34 | -days 365 \ 35 | -CAcreateserial \ 36 | -passin pass:$password \ 37 | -extensions v3_req \ 38 | -extfile <(cat < $certname-keypair.pem 55 | -------------------------------------------------------------------------------- /kafka-ssl/security/create-jks-certificate.sh: -------------------------------------------------------------------------------- 1 | #! /bin/bash 2 | 3 | certname=$1 4 | password=codingharbour 5 | 6 | # Create a keystore 7 | keytool -genkeypair \ 8 | -alias $certname \ 9 | -keyalg RSA \ 10 | -keysize 2048 \ 11 | -validity 365 \ 12 | -keystore $certname.keystore.jks \ 13 | -dname "CN=$certname,OU=TEST,O=CodingHarbour,L=Oslo,C=NO" \ 14 | -ext "SAN=dns:$certname,dns:localhost" \ 15 | -storepass $password \ 16 | -keypass $password \ 17 | -storetype pkcs12 18 | 19 | # create a CSR 20 | keytool -certreq \ 21 | -sigAlg SHA256withRSA \ 22 | -alias $certname \ 23 | -file $certname.csr \ 24 | -keystore $certname.keystore.jks \ 25 | -ext "SAN=dns:$certname,dns:localhost" \ 26 | -storepass $password \ 27 | -keypass $password \ 28 | 29 | 30 | # Sign the CSR with the root CA 31 | openssl x509 -req \ 32 | -CA root.crt \ 33 | -CAkey root.key \ 34 | -in $certname.csr \ 35 | -out $certname-signed.crt \ 36 | -sha256 \ 37 | -days 365 \ 38 | -CAcreateserial \ 39 | -passin pass:$password \ 40 | -extensions v3_req \ 41 | -extfile <(cat </dev/null && pwd )" 4 | 5 | root_cert=root.crt 6 | root_key=root.key 7 | password=codingharbour 8 | 9 | echo $password > credentials 10 | 11 | if [ ! -f "$root_cert" ]; then 12 | echo "Create a root certificate" 13 | openssl req \ 14 | -x509 \ 15 | -days 365 \ 16 | -newkey rsa:2048 \ 17 | -keyout $root_key \ 18 | -out $root_cert \ 19 | -subj '/CN=root.codingharbourexample.com/OU=TEST/O=CodingHarbour/L=Oslo/C=NO' \ 20 | -passin pass:$password \ 21 | -passout pass:$password 22 | fi 23 | 24 | for i in producer consumer broker zookeeper 25 | do 26 | echo "Create a certificate for $i" 27 | ./create-pem-certificate.sh $i 28 | echo 29 | done 30 | 31 | rm *.srl 32 | 33 | echo "Create a truststore" 34 | 35 | keytool -import \ 36 | -noprompt \ 37 | -keystore truststore.jks \ 38 | -alias root-ca \ 39 | -file $root_cert \ 40 | -storepass $password \ 41 | -keypass $password 42 | 43 | # create properties for producer and consumer 44 | consumer_cert=$(awk 'NF {sub(/\r/, ""); printf "%s\\n",$0;}' consumer-signed.crt) 45 | consumer_key=$(awk 'NF {sub(/\r/, ""); printf "%s\\n",$0;}' consumer.key) 46 | truststore_cert=$(awk 'NF {sub(/\r/, ""); printf "%s\\n",$0;}' $root_cert) 47 | 48 | echo 49 | echo "Create consumer.properties with inline certificate, private key and truststore" 50 | cat < consumer.properties 51 | security.protocol=SSL 52 | ssl.keystore.type=PEM 53 | ssl.keystore.certificate.chain=$consumer_cert 54 | ssl.keystore.key=$consumer_key 55 | ssl.key.password=$password 56 | ssl.truststore.type=PEM 57 | ssl.truststore.certificates=$truststore_cert 58 | EOF 59 | 60 | echo 61 | echo "Create producer.properties that uses PEM files" 62 | cat < producer.properties 63 | security.protocol=SSL 64 | ssl.keystore.type=PEM 65 | ssl.keystore.location=$DIR/producer-keypair.pem 66 | ssl.key.password=$password 67 | ssl.truststore.type=PEM 68 | ssl.truststore.location=$DIR/$root_cert 69 | EOF 70 | -------------------------------------------------------------------------------- /single-node-avro-kafka/docker-compose.yml: -------------------------------------------------------------------------------- 1 | --- 2 | version: '2' 3 | services: 4 | zookeeper: 5 | image: confluentinc/cp-zookeeper:${CP_VERSION} 6 | ports: 7 | - 2181:2181 8 | environment: 9 | ZOOKEEPER_CLIENT_PORT: 2181 10 | ZOOKEEPER_TICK_TIME: 2000 11 | container_name: sn-zookeeper 12 | 13 | kafka: 14 | # "`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,- 15 | # An important note about accessing Kafka from clients on other machines: 16 | # ----------------------------------------------------------------------- 17 | # 18 | # The config used here exposes port 9092 for _external_ connections to the broker 19 | # i.e. those from _outside_ the docker network. This could be from the host machine 20 | # running docker, or maybe further afield if you've got a more complicated setup. 21 | # If the latter is true, you will need to change the value 'localhost' in 22 | # KAFKA_ADVERTISED_LISTENERS to one that is resolvable to the docker host from those 23 | # remote clients 24 | # 25 | # For connections _internal_ to the docker network, such as from other services 26 | # and components, use kafka:29092. 27 | # 28 | # See https://rmoff.net/2018/08/02/kafka-listeners-explained/ for details 29 | # "`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,-'"`-._,- 30 | # 31 | image: confluentinc/cp-kafka:${CP_VERSION} 32 | depends_on: 33 | - zookeeper 34 | ports: 35 | - 9092:9092 36 | container_name: sn-kafka 37 | environment: 38 | KAFKA_BROKER_ID: 1 39 | KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181 40 | KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:29092,PLAINTEXT_HOST://localhost:9092 41 | KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT 42 | KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT 43 | KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1 44 | 45 | schema-registry: 46 | image: confluentinc/cp-schema-registry:${CP_VERSION} 47 | depends_on: 48 | - zookeeper 49 | - kafka 50 | ports: 51 | - 8081:8081 52 | container_name: sn-schema-registry 53 | environment: 54 | SCHEMA_REGISTRY_HOST_NAME: schema-registry 55 | SCHEMA_REGISTRY_KAFKASTORE_BOOTSTRAP_SERVERS: 'PLAINTEXT://kafka:29092' 56 | -------------------------------------------------------------------------------- /kafka-ssl/docker-compose.yml: -------------------------------------------------------------------------------- 1 | --- 2 | version: '2' 3 | services: 4 | zookeeper: 5 | image: confluentinc/cp-zookeeper:${CP_VERSION} 6 | container_name: zookeeper 7 | volumes: 8 | - ./security:/etc/kafka/secrets 9 | command: "bash -c 'if [ ! -f /etc/kafka/secrets/zookeeper-keypair.pem ]; then echo \"ERROR: SSL certificates missing from /etc/kafka/secrets/ (did you remember to run ./start-cluster.sh instead of docker-compose up -d?)\" && exit 1 ; else /etc/confluent/docker/run ; fi'" 10 | environment: 11 | ZOOKEEPER_CLIENT_PORT: 2181 12 | ZOOKEEPER_SECURE_CLIENT_PORT: 2182 13 | ZOOKEEPER_TICK_TIME: 2000 14 | ZOOKEEPER_SERVER_CNXN_FACTORY: org.apache.zookeeper.server.NettyServerCnxnFactory 15 | ZOOKEEPER_SSL_KEYSTORE_LOCATION: /etc/kafka/secrets/zookeeper-keypair.pem 16 | ZOOKEEPER_SSL_KEYSTORE_PASSWORD: codingharbour 17 | ZOOKEEPER_SSL_KEYSTORE_TYPE: PEM 18 | ZOOKEEPER_SSL_TRUSTSTORE_LOCATION: /etc/kafka/secrets/root.crt 19 | ZOOKEEPER_SSL_TRUSTSTORE_PASSWORD: codingharbour 20 | ZOOKEEPER_SSL_TRUSTSTORE_TYPE: PEM 21 | ZOOKEEPER_SSL_CLIENT_AUTH: need 22 | ZOOKEEPER_AUTH_PROVIDER_X509: org.apache.zookeeper.server.auth.X509AuthenticationProvider 23 | 24 | broker: 25 | image: confluentinc/cp-kafka:${CP_VERSION} 26 | depends_on: 27 | - zookeeper 28 | ports: 29 | - 9092:9092 30 | - 9093:9093 31 | container_name: broker 32 | volumes: 33 | - ./security:/etc/kafka/secrets 34 | command: "bash -c 'if [ ! -f /etc/kafka/secrets/broker-keypair.pem ]; then echo \"ERROR: SSL certificates missing from /etc/kafka/secrets/ (did you remember to run ./start-cluster.sh instead of docker-compose up -d?)\" && exit 1 ; else /etc/confluent/docker/run ; fi'" 35 | environment: 36 | KAFKA_BROKER_ID: 1 37 | KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://broker:29092,PLAINTEXT_HOST://localhost:9092,TLS://broker:29093,TLS_HOST://localhost:9093 38 | KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT,TLS:SSL,TLS_HOST:SSL 39 | KAFKA_INTER_BROKER_LISTENER_NAME: TLS #cannot use SSL as name, due to bug in configure script 40 | KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1 41 | KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1 42 | 43 | KAFKA_AUTO_CREATE_TOPICS_ENABLE: 'false' 44 | 45 | KAFKA_ZOOKEEPER_CONNECT: zookeeper:2182 46 | KAFKA_ZOOKEEPER_SSL_CLIENT_ENABLE: 'true' 47 | KAFKA_ZOOKEEPER_CLIENT_CNXN_SOCKET: org.apache.zookeeper.ClientCnxnSocketNetty 48 | KAFKA_ZOOKEEPER_SSL_KEYSTORE_LOCATION: /etc/kafka/secrets/broker-keypair.pem 49 | KAFKA_ZOOKEEPER_SSL_KEYSTORE_PASSWORD: codingharbour 50 | KAFKA_ZOOKEEPER_SSL_KEYSTORE_TYPE: PEM 51 | KAFKA_ZOOKEEPER_SSL_TRUSTSTORE_LOCATION: /etc/kafka/secrets/root.crt 52 | KAFKA_ZOOKEEPER_SSL_TRUSTSTORE_PASSWORD: codingharbour 53 | KAFKA_ZOOKEEPER_SSL_TRUSTSTORE_TYPE: PEM 54 | 55 | # option 1: provide certs as strings 56 | 57 | # KAFKA_SSL_KEYSTORE_TYPE: PEM 58 | # KAFKA_SSL_KEYSTORE_CERTIFICATE_CHAIN: -----BEGIN CERTIFICATE-----\nMII....\n-----END CERTIFICATE----- 59 | # KAFKA_SSL_KEYSTORE_KEY: -----BEGIN ENCRYPTED PRIVATE KEY-----\nMIIE...\n-----END ENCRYPTED PRIVATE KEY----- 60 | # KAFKA_SSL_KEY_PASSWORD: codingharbour 61 | # KAFKA_SSL_TRUSTSTORE_TYPE: PEM 62 | # KAFKA_SSL_TRUSTSTORE_CERTIFICATES: -----BEGIN CERTIFICATE-----\nMIID...\n-----END CERTIFICATE----- 63 | 64 | # option 2: use pem files 65 | 66 | KAFKA_SSL_KEYSTORE_LOCATION: /etc/kafka/secrets/broker-keypair.pem 67 | KAFKA_SSL_KEY_PASSWORD: codingharbour 68 | KAFKA_SSL_KEYSTORE_TYPE: PEM 69 | KAFKA_SSL_TRUSTSTORE_LOCATION: /etc/kafka/secrets/root.crt 70 | KAFKA_SSL_TRUSTSTORE_TYPE: PEM 71 | 72 | KAFKA_SSL_CLIENT_AUTH: "required" 73 | KAFKA_ALLOW_EVERYONE_IF_NO_ACL_FOUND: 'true' 74 | 75 | KAFKA_AUTHORIZER_CLASS_NAME: kafka.security.authorizer.AclAuthorizer 76 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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