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Adds a new init task that creates all required topics using their respective default configuration during startup. This replaces the need for a separate init container (i.e. `redpanda-init` in our `docker-compose.yml`: https://github.com/DependencyTrack/hyades/blob/008c3a1b024969a159de085d5ca6b464147faa9a/docker-compose.yml#L251-L273). The creation of topics is also faster because it can be done in a single batched request, vs. 10s of repetitive CLI invocations. This init task is disabled by default for now, since it's not meant to be used for production deployments. The idea is to build on this work, and allow users to customize the default topic configurations (e.g. via env vars or config files). Relates to DependencyTrack/hyades#1195 Signed-off-by: nscuro <[email protected]>
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src/main/java/org/dependencytrack/event/kafka/KafkaTopicInitializer.java
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| /* | ||
| * This file is part of Dependency-Track. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * Copyright (c) OWASP Foundation. All Rights Reserved. | ||
| */ | ||
| package org.dependencytrack.event.kafka; | ||
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| import alpine.Config; | ||
| import alpine.common.logging.Logger; | ||
| import org.apache.kafka.clients.admin.AdminClient; | ||
| import org.apache.kafka.clients.admin.CreateTopicsOptions; | ||
| import org.apache.kafka.clients.admin.CreateTopicsResult; | ||
| import org.apache.kafka.clients.admin.DescribeTopicsOptions; | ||
| import org.apache.kafka.clients.admin.DescribeTopicsResult; | ||
| import org.apache.kafka.clients.admin.NewTopic; | ||
| import org.apache.kafka.clients.admin.TopicDescription; | ||
| import org.apache.kafka.common.KafkaFuture; | ||
| import org.apache.kafka.common.errors.UnknownTopicOrPartitionException; | ||
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| import jakarta.servlet.ServletContextEvent; | ||
| import jakarta.servlet.ServletContextListener; | ||
| import java.util.ArrayList; | ||
| import java.util.Collection; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.concurrent.ExecutionException; | ||
| import java.util.function.Function; | ||
| import java.util.stream.Collectors; | ||
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| import static org.apache.kafka.clients.CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG; | ||
| import static org.apache.kafka.clients.CommonClientConfigs.CLIENT_ID_CONFIG; | ||
| import static org.dependencytrack.common.ConfigKey.INIT_TASKS_ENABLED; | ||
| import static org.dependencytrack.common.ConfigKey.INIT_TASKS_KAFKA_TOPICS_ENABLED; | ||
| import static org.dependencytrack.common.ConfigKey.KAFKA_BOOTSTRAP_SERVERS; | ||
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|
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| /** | ||
| * @since 5.6.0 | ||
| */ | ||
| public class KafkaTopicInitializer implements ServletContextListener { | ||
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| private static final Logger LOGGER = Logger.getLogger(KafkaTopicInitializer.class); | ||
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| private final Config config = Config.getInstance(); | ||
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| @Override | ||
| public void contextInitialized(final ServletContextEvent event) { | ||
| if (!config.getPropertyAsBoolean(INIT_TASKS_ENABLED)) { | ||
| LOGGER.debug("Not initializing Kafka topics because %s is disabled" | ||
| .formatted(INIT_TASKS_ENABLED.getPropertyName())); | ||
| return; | ||
| } | ||
| if (!config.getPropertyAsBoolean(INIT_TASKS_KAFKA_TOPICS_ENABLED)) { | ||
| LOGGER.debug("Not initializing Kafka topics because %s is disabled" | ||
| .formatted(INIT_TASKS_KAFKA_TOPICS_ENABLED.getPropertyName())); | ||
| return; | ||
| } | ||
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| LOGGER.warn("Auto-creating topics with default configuration is not recommended for production deployments"); | ||
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| try (final AdminClient adminClient = createAdminClient()) { | ||
| final List<KafkaTopics.Topic<?, ?>> topicsToCreate = determineTopicsToCreate(adminClient); | ||
| if (topicsToCreate.isEmpty()) { | ||
| LOGGER.info("All topics exist already; Nothing to do"); | ||
| return; | ||
| } | ||
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| createTopics(adminClient, topicsToCreate); | ||
| LOGGER.info("Successfully created %d topics".formatted(topicsToCreate.size())); | ||
| } | ||
| } | ||
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| private List<KafkaTopics.Topic<?, ?>> determineTopicsToCreate(final AdminClient adminClient) { | ||
| final Map<String, KafkaTopics.Topic<?, ?>> topicByName = KafkaTopics.ALL_TOPICS.stream() | ||
| .collect(Collectors.toMap(KafkaTopics.Topic::name, Function.identity())); | ||
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| final var topicsToCreate = new ArrayList<KafkaTopics.Topic<?, ?>>(topicByName.size()); | ||
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| final var describeTopicsOptions = new DescribeTopicsOptions().timeoutMs(3_000); | ||
| final DescribeTopicsResult topicsResult = adminClient.describeTopics(topicByName.keySet(), describeTopicsOptions); | ||
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| final var exceptionsByTopicName = new HashMap<String, Throwable>(); | ||
| for (final Map.Entry<String, KafkaFuture<TopicDescription>> entry : topicsResult.topicNameValues().entrySet()) { | ||
| final String topicName = entry.getKey(); | ||
| try { | ||
| entry.getValue().get(); | ||
| } catch (ExecutionException e) { | ||
| if (e.getCause() instanceof UnknownTopicOrPartitionException) { | ||
| LOGGER.debug("Topic %s does not exist and will need to be created".formatted(topicName)); | ||
| topicsToCreate.add(topicByName.get(topicName)); | ||
| } else { | ||
| exceptionsByTopicName.put(topicName, e.getCause()); | ||
| } | ||
| } catch (InterruptedException e) { | ||
| Thread.currentThread().interrupt(); | ||
| throw new IllegalStateException(""" | ||
| Thread was interrupted while waiting for broker response. \ | ||
| The existence of topic %s can not be determined.""".formatted(topicName), e); | ||
| } | ||
| } | ||
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| if (!exceptionsByTopicName.isEmpty()) { | ||
| final String exceptionSummary = exceptionsByTopicName.entrySet().stream() | ||
| .map(entry -> "{topic=%s, error=%s}".formatted(entry.getKey(), entry.getValue())) | ||
| .collect(Collectors.joining(", ", "[", "]")); | ||
| throw new IllegalStateException("Existence of %d topic(s) could not be verified: %s" | ||
| .formatted(exceptionsByTopicName.size(), exceptionSummary)); | ||
| } | ||
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| return topicsToCreate; | ||
| } | ||
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| private void createTopics(final AdminClient adminClient, final Collection<KafkaTopics.Topic<?, ?>> topics) { | ||
| final List<NewTopic> newTopics = topics.stream() | ||
| .map(topic -> { | ||
| final var newTopic = new NewTopic( | ||
| topic.name(), | ||
| topic.defaultConfig().partitions(), | ||
| topic.defaultConfig().replicationFactor()); | ||
| if (topic.defaultConfig().configs() != null) { | ||
| return newTopic.configs(topic.defaultConfig().configs()); | ||
| } | ||
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| return newTopic; | ||
| }) | ||
| .toList(); | ||
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| final var createTopicsOptions = new CreateTopicsOptions().timeoutMs(3_000); | ||
| final CreateTopicsResult createTopicsResult = adminClient.createTopics(newTopics, createTopicsOptions); | ||
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| final var exceptionsByTopicName = new HashMap<String, Throwable>(); | ||
| for (final Map.Entry<String, KafkaFuture<Void>> entry : createTopicsResult.values().entrySet()) { | ||
| final String topicName = entry.getKey(); | ||
| try { | ||
| entry.getValue().get(); | ||
| } catch (ExecutionException e) { | ||
| exceptionsByTopicName.put(topicName, e.getCause()); | ||
| } catch (InterruptedException e) { | ||
| Thread.currentThread().interrupt(); | ||
| throw new IllegalStateException(""" | ||
| Thread was interrupted while waiting for broker response. \ | ||
| Successful creation of topic %s can not be verified.""".formatted(topicName), e); | ||
| } | ||
| } | ||
|
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| if (!exceptionsByTopicName.isEmpty()) { | ||
| final String exceptionSummary = exceptionsByTopicName.entrySet().stream() | ||
| .map(entry -> "{topic=%s, error=%s}".formatted(entry.getKey(), entry.getValue())) | ||
| .collect(Collectors.joining(", ", "[", "]")); | ||
| throw new IllegalStateException("Failed to create %d topic(s): %s" | ||
| .formatted(exceptionsByTopicName.size(), exceptionSummary)); | ||
| } | ||
| } | ||
|
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| private AdminClient createAdminClient() { | ||
| final var adminClientConfig = new HashMap<String, Object>(); | ||
| adminClientConfig.put(BOOTSTRAP_SERVERS_CONFIG, config.getProperty(KAFKA_BOOTSTRAP_SERVERS)); | ||
| adminClientConfig.put(CLIENT_ID_CONFIG, "%s-admin-client".formatted("instanceId")); | ||
|
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| LOGGER.debug("Creating admin client with options %s".formatted(adminClientConfig)); | ||
| return AdminClient.create(adminClientConfig); | ||
| } | ||
|
|
||
| } |
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