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pyvenv.cfg | ||
pip-selfcheck.json | ||
poetry.toml | ||
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# local SSL cluster certificates | ||
kafka-certs/ |
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# Kstreams SSL example | ||
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This example shows how setup an SSL connection with `kstreams`. For this purpose we have to setup a local kafka SSL cluster. | ||
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`ENV` varialbles are exported using the script `/scripts/ssl/export-env-variables` and loaded in python using [pydantic-settings](https://docs.pydantic.dev/latest/concepts/pydantic_settings/). | ||
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Check [resources.py](https://github.com/kpn/kstreams/blob/master/examples/ssl-example/ssl_example/resources.py) to see how the backend with `SSL` is created | ||
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## Requirements | ||
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`python 3.8+`, `poetry`, `docker-compose`, `openssl` | ||
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### Usage | ||
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First create the server and client sertificates: | ||
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```bash | ||
./scripts/ssl/ssl-setup | ||
``` | ||
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After executing the privious script, you will see a new folder called `kafka-certs`. The folder contains the `server` (inside the server folder), | ||
`admin` (inside the admin folder) and `client` certicicates. Do not worry about the content of them, it is just an example and they can be deleted, | ||
shared and recreated (it is just a local example) | ||
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Now you can run the local SSL cluster: | ||
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```bash | ||
./scripts/cluster/start | ||
``` | ||
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Second, you need to install the project dependencies dependencies. In a different terminal execute: | ||
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```bash | ||
poetry install | ||
``` | ||
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Export the env variables: | ||
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```bash | ||
. ./scripts/ssl/export-env-variables | ||
``` | ||
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Then we can run the project | ||
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```bash | ||
poetry run app | ||
``` | ||
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You should see something similar to the following logs: | ||
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```bash | ||
kstreams/examples/ssl-example via 🐳 colima is 📦 v0.1.0 via 🐍 v3.12.4 | ||
❯ poetry run app | ||
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INFO:ssl_example.app:Starting application... | ||
INFO:aiokafka.consumer.subscription_state:Updating subscribed topics to: frozenset({'local--kstreams'}) | ||
INFO:aiokafka.consumer.consumer:Subscribed to topic(s): {'local--kstreams'} | ||
INFO:kstreams.prometheus.monitor:Starting Prometheus Monitoring started... | ||
INFO:ssl_example.app:Producing event 0 | ||
INFO:ssl_example.app:Producing event 1 | ||
INFO:ssl_example.app:Producing event 2 | ||
INFO:ssl_example.app:Producing event 3 | ||
INFO:ssl_example.app:Producing event 4 | ||
ERROR:aiokafka.consumer.group_coordinator:Group Coordinator Request failed: [Error 15] GroupCoordinatorNotAvailableError | ||
ERROR:aiokafka.consumer.group_coordinator:Group Coordinator Request failed: [Error 15] GroupCoordinatorNotAvailableError | ||
ERROR:aiokafka.consumer.group_coordinator:Group Coordinator Request failed: [Error 15] GroupCoordinatorNotAvailableError | ||
ERROR:aiokafka.consumer.group_coordinator:Group Coordinator Request failed: [Error 15] GroupCoordinatorNotAvailableError | ||
ERROR:aiokafka.consumer.group_coordinator:Group Coordinator Request failed: [Error 15] GroupCoordinatorNotAvailableError | ||
ERROR:aiokafka.consumer.group_coordinator:Group Coordinator Request failed: [Error 15] GroupCoordinatorNotAvailableError | ||
ERROR:aiokafka.consumer.group_coordinator:Group Coordinator Request failed: [Error 15] GroupCoordinatorNotAvailableError | ||
ERROR:aiokafka.consumer.group_coordinator:Group Coordinator Request failed: [Error 15] GroupCoordinatorNotAvailableError | ||
ERROR:aiokafka.consumer.group_coordinator:Group Coordinator Request failed: [Error 15] GroupCoordinatorNotAvailableError | ||
ERROR:aiokafka.consumer.group_coordinator:Group Coordinator Request failed: [Error 15] GroupCoordinatorNotAvailableError | ||
ERROR:aiokafka.consumer.group_coordinator:Group Coordinator Request failed: [Error 15] GroupCoordinatorNotAvailableError | ||
ERROR:aiokafka.consumer.group_coordinator:Group Coordinator Request failed: [Error 15] GroupCoordinatorNotAvailableError | ||
INFO:aiokafka.consumer.group_coordinator:Discovered coordinator 1 for group example-group | ||
INFO:aiokafka.consumer.group_coordinator:Revoking previously assigned partitions set() for group example-group | ||
INFO:aiokafka.consumer.group_coordinator:(Re-)joining group example-group | ||
INFO:aiokafka.consumer.group_coordinator:Joined group 'example-group' (generation 1) with member_id aiokafka-0.11.0-5fb10c73-64b2-42a8-ae8a-23f59d4a3b6b | ||
INFO:aiokafka.consumer.group_coordinator:Elected group leader -- performing partition assignments using roundrobin | ||
INFO:aiokafka.consumer.group_coordinator:Successfully synced group example-group with generation 1 | ||
INFO:aiokafka.consumer.group_coordinator:Setting newly assigned partitions {TopicPartition(topic='local--kstreams', partition=0)} for group example-group | ||
``` | ||
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## Note | ||
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If you plan on using this example, pay attention to the `pyproject.toml` dependencies, where | ||
`kstreams` is pointing to the parent folder. You will have to set the latest version. |
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version: '3' | ||
services: | ||
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zookeeper: | ||
image: "confluentinc/cp-zookeeper:7.3.0" | ||
hostname: zookeeper | ||
container_name: zookeeper | ||
ports: | ||
- 32181:32181 | ||
environment: | ||
- ZOOKEEPER_CLIENT_PORT=32181 | ||
kafka: | ||
volumes: | ||
- ./kafka-certs/server/:/etc/kafka/secrets | ||
- ./kafka-certs/admin/client.properties:/etc/kafka/config/client.properties | ||
image: "confluentinc/cp-kafka:7.3.0" | ||
hostname: kafka | ||
container_name: kafka | ||
environment: | ||
KAFKA_BROKER_ID: "1" | ||
KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: "1" | ||
KAFKA_AUTO_CREATE_TOPICS_ENABLE: "true" | ||
KAFKA_ZOOKEEPER_CONNECT: "zookeeper:32181" | ||
KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0 | ||
CONFLUENT_METRICS_ENABLE: 'true' | ||
CONFLUENT_SUPPORT_CUSTOMER_ID: anonymous | ||
# Kafka security | ||
KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: SSL:SSL,SSL2:SSL | ||
KAFKA_SECURITY_INTER_BROKER_PROTOCOL: SSL | ||
KAFKA_ADVERTISED_LISTENERS: SSL://localhost:9092,SSL2://kafka:9093 | ||
KAFKA_SSL_KEYSTORE_FILENAME: keystore.jks | ||
KAFKA_SSL_TRUSTSTORE_FILENAME: truststore.jks | ||
KAFKA_SSL_KEY_CREDENTIALS: ssl-key-credentials | ||
KAFKA_SSL_KEYSTORE_CREDENTIALS: key-store-credentials | ||
KAFKA_SSL_TRUSTSTORE_CREDENTIALS: trust-store-credentials | ||
KAFKA_SSL_CLIENT_AUTH: required | ||
KAFKA_AUTHORIZER_CLASS_NAME: kafka.security.authorizer.AclAuthorizer | ||
KAFKA_SSL_PRINCIPAL_MAPPING_RULES: RULE:^.*[Cc][Nn]=([a-zA-Z0-9._-]*).*$$/CN=$$1/,DEFAULT | ||
KAFKA_SUPER_USERS: User:CN=localhost;User:CN=admin.client.company.org; | ||
ports: | ||
- "9092:9092" | ||
- "29092:29092" | ||
depends_on: | ||
- zookeeper | ||
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