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class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Configuring Kafka</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: Next</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>Configuring Kafka in DataHub</h1><p>DataHub requires Kafka to operate. Kafka is used as a durable log that can be used to store inbound
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requests to update the Metadata Graph (Metadata Change Proposal), or as a change log detailing the updates
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that have been made to the Metadata Graph (Metadata Change Log).</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="environment-variables">Environment Variables<a href="#environment-variables" class="hash-link" aria-label="Direct link to Environment Variables" title="Direct link to Environment Variables"></a></h2><p>The following environment variables can be used to customize DataHub's connection to Kafka for the following DataHub components,
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each of which requires a connection to Kafka:</p><ul><li><code>metadata-service</code> (datahub-gms container)</li><li>(Advanced - if standalone consumers are deployed) <code>mce-consumer-job</code> (datahub-mce-consumer container)</li><li>(Advanced - if standalone consumers are deployed) <code>mae-consumer-job</code> (datahub-mae-consumer container)</li><li>(Advanced - if product analytics are enabled) datahub-frontend</li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="connection-configuration">Connection Configuration<a href="#connection-configuration" class="hash-link" aria-label="Direct link to Connection Configuration" title="Direct link to Connection Configuration"></a></h3><p>With the exception of <code>KAFKA_BOOTSTRAP_SERVER</code> and <code>KAFKA_SCHEMAREGISTRY_URL</code>, Kafka is configured via <a href="https://spring.io/projects/spring-boot" target="_blank" rel="noopener noreferrer">spring-boot</a>, specifically with <a href="https://docs.spring.io/spring-boot/docs/current/api/org/springframework/boot/autoconfigure/kafka/KafkaProperties.html" target="_blank" rel="noopener noreferrer">KafkaProperties</a>. See <a href="https://docs.spring.io/spring-boot/docs/current/reference/html/appendix-application-properties.html#integration-properties" target="_blank" rel="noopener noreferrer">Integration Properties</a> prefixed with <code>spring.kafka</code>.</p><p>Below is an example of how SASL/GSSAPI properties can be configured via environment variables:</p><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token builtin class-name" style="color:rgb(255, 203, 107)">export</span><span class="token plain"> </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">KAFKA_BOOTSTRAP_SERVER</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">broker:29092</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token builtin class-name" style="color:rgb(255, 203, 107)">export</span><span class="token plain"> </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">KAFKA_SCHEMAREGISTRY_URL</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">http://schema-registry:8081</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token builtin class-name" style="color:rgb(255, 203, 107)">export</span><span class="token plain"> </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">SPRING_KAFKA_PROPERTIES_SASL_KERBEROS_SERVICE_NAME</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">kafka</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token builtin class-name" style="color:rgb(255, 203, 107)">export</span><span class="token plain"> </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">SPRING_KAFKA_PROPERTIES_SECURITY_PROTOCOL</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">SASL_PLAINTEXT</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token builtin class-name" style="color:rgb(255, 203, 107)">export</span><span class="token plain"> </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">SPRING_KAFKA_PROPERTIES_SASL_JAAS_CONFIG</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">com.sun.security.auth.module.Krb5LoginModule required </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">principal</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token string" style="color:rgb(195, 232, 141)">'principal@REALM'</span><span class="token plain"> </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">useKeyTab</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">storeKey</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">keyTab</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token string" style="color:rgb(195, 232, 141)">'/keytab'</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h4 class="anchor anchorWithStickyNavbar_LWe7" id="example-connecting-using-aws-iam-msk">Example: Connecting using AWS IAM (MSK)<a href="#example-connecting-using-aws-iam-msk" class="hash-link" aria-label="Direct link to Example: Connecting using AWS IAM (MSK)" title="Direct link to Example: Connecting using AWS IAM (MSK)"></a></h4><p>Here is another example of how SASL_SSL can be configured for AWS_MSK_IAM when connecting to MSK using IAM via environment variables</p><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token assign-left variable" style="color:rgb(191, 199, 213)">SPRING_KAFKA_PROPERTIES_SECURITY_PROTOCOL</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">SASL_SSL</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">SPRING_KAFKA_PROPERTIES_SSL_TRUSTSTORE_LOCATION</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">/tmp/kafka.client.truststore.jks</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">SPRING_KAFKA_PROPERTIES_SASL_MECHANISM</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">AWS_MSK_IAM</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">SPRING_KAFKA_PROPERTIES_SASL_JAAS_CONFIG</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">software.amazon.msk.auth.iam.IAMLoginModule required</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">SPRING_KAFKA_PROPERTIES_SASL_CLIENT_CALLBACK_HANDLER_CLASS</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">software.amazon.msk.auth.iam.IAMClientCallbackHandler</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>For more information about configuring these variables, check out Spring's <a href="https://docs.spring.io/spring-boot/docs/current/reference/html/spring-boot-features.html#boot-features-external-config" target="_blank" rel="noopener noreferrer">Externalized Configuration</a> to see how this works.
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Also see <a href="https://docs.confluent.io/current/connect/security.html" target="_blank" rel="noopener noreferrer">Kafka Connect Security</a> for more ways to connect.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="topic-configuration">Topic Configuration<a href="#topic-configuration" class="hash-link" aria-label="Direct link to Topic Configuration" title="Direct link to Topic Configuration"></a></h3><p>By default, DataHub relies on the a set of Kafka topics to operate. By default, they have the following names:</p><ol><li><strong>MetadataChangeProposal_v1</strong></li><li><strong>FailedMetadataChangeProposal_v1</strong></li><li><strong>MetadataChangeLog_Versioned_v1</strong></li><li><strong>MetadataChangeLog_Timeseries_v1</strong></li><li><strong>DataHubUsageEvent_v1</strong>: User behavior tracking event for UI</li><li>(Deprecated) <strong>MetadataChangeEvent_v4</strong>: Metadata change proposal messages</li><li>(Deprecated) <strong>MetadataAuditEvent_v4</strong>: Metadata change log messages</li><li>(Deprecated) <strong>FailedMetadataChangeEvent_v4</strong>: Failed to process #1 event</li><li><strong>MetadataGraphEvent_v4</strong>:</li><li><strong>MetadataGraphEvent_v4</strong>:</li><li><strong>PlatformEvent_v1</strong>:</li><li><strong>DataHubUpgradeHistory_v1</strong>: Notifies the end of DataHub Upgrade job so dependants can act accordingly (<em>eg</em>, startup).
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Note this topic requires special configuration: <strong>Infinite retention</strong>. Also, 1 partition is enough for the occasional traffic.</li></ol><p>How Metadata Events relate to these topics is discussed at more length in <a href="/docs/what/mxe">Metadata Events</a>.</p><p>We've included environment variables to customize the name each of these topics, for cases where an organization has naming rules for your topics.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="metadata-service-datahub-gms">Metadata Service (datahub-gms)<a href="#metadata-service-datahub-gms" class="hash-link" aria-label="Direct link to Metadata Service (datahub-gms)" title="Direct link to Metadata Service (datahub-gms)"></a></h3><p>The following are environment variables you can use to configure topic names used in the Metadata Service container:</p><ul><li><code>METADATA_CHANGE_PROPOSAL_TOPIC_NAME</code>: The name of the topic for Metadata Change Proposals emitted by the ingestion framework.</li><li><code>FAILED_METADATA_CHANGE_PROPOSAL_TOPIC_NAME</code>: The name of the topic for Metadata Change Proposals emitted when MCPs fail processing.</li><li><code>METADATA_CHANGE_LOG_VERSIONED_TOPIC_NAME</code>: The name of the topic for Metadata Change Logs that are produced for Versioned Aspects.</li><li><code>METADATA_CHANGE_LOG_TIMESERIES_TOPIC_NAME</code>: The name of the topic for Metadata Change Logs that are produced for Timeseries Aspects.</li><li><code>PLATFORM_EVENT_TOPIC_NAME</code>: The name of the topic for Platform Events (high-level semantic events).</li><li><code>DATAHUB_USAGE_EVENT_NAME</code>: The name of the topic for product analytics events.</li><li>(Deprecated) <code>METADATA_CHANGE_EVENT_NAME</code>: The name of the metadata change event topic.</li><li>(Deprecated) <code>METADATA_AUDIT_EVENT_NAME</code>: The name of the metadata audit event topic.</li><li>(Deprecated) <code>FAILED_METADATA_CHANGE_EVENT_NAME</code>: The name of the failed metadata change event topic.</li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="mce-consumer-datahub-mce-consumer">MCE Consumer (datahub-mce-consumer)<a href="#mce-consumer-datahub-mce-consumer" class="hash-link" aria-label="Direct link to MCE Consumer (datahub-mce-consumer)" title="Direct link to MCE Consumer (datahub-mce-consumer)"></a></h3><ul><li><code>METADATA_CHANGE_PROPOSAL_TOPIC_NAME</code>: The name of the topic for Metadata Change Proposals emitted by the ingestion framework.</li><li><code>FAILED_METADATA_CHANGE_PROPOSAL_TOPIC_NAME</code>: The name of the topic for Metadata Change Proposals emitted when MCPs fail processing.</li><li>(Deprecated) <code>METADATA_CHANGE_EVENT_NAME</code>: The name of the deprecated topic that an embedded MCE consumer will consume from.</li><li>(Deprecated) <code>FAILED_METADATA_CHANGE_EVENT_NAME</code>: The name of the deprecated topic that failed MCEs will be written to.</li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="mae-consumer-datahub-mae-consumer">MAE Consumer (datahub-mae-consumer)<a href="#mae-consumer-datahub-mae-consumer" class="hash-link" aria-label="Direct link to MAE Consumer (datahub-mae-consumer)" title="Direct link to MAE Consumer (datahub-mae-consumer)"></a></h3><ul><li><code>METADATA_CHANGE_LOG_VERSIONED_TOPIC_NAME</code>: The name of the topic for Metadata Change Logs that are produced for Versioned Aspects.</li><li><code>METADATA_CHANGE_LOG_TIMESERIES_TOPIC_NAME</code>: The name of the topic for Metadata Change Logs that are produced for Timeseries Aspects.</li><li><code>PLATFORM_EVENT_TOPIC_NAME</code>: The name of the topic for Platform Events (high-level semantic events).</li><li><code>DATAHUB_USAGE_EVENT_NAME</code>: The name of the topic for product analytics events.</li><li>(Deprecated) <code>METADATA_AUDIT_EVENT_NAME</code>: The name of the deprecated metadata audit event topic.</li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="datahub-frontend-datahub-frontend-react">DataHub Frontend (datahub-frontend-react)<a href="#datahub-frontend-datahub-frontend-react" class="hash-link" aria-label="Direct link to DataHub Frontend (datahub-frontend-react)" title="Direct link to DataHub Frontend (datahub-frontend-react)"></a></h3><ul><li><code>DATAHUB_TRACKING_TOPIC</code>: The name of the topic used for storing DataHub usage events.
|
||
It should contain the same value as <code>DATAHUB_USAGE_EVENT_NAME</code> in the Metadata Service container.</li></ul><p>Please ensure that these environment variables are set consistently throughout your ecosystem. DataHub has a few different applications running which communicate with Kafka (see above).</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="configuring-consumer-group-id">Configuring Consumer Group Id<a href="#configuring-consumer-group-id" class="hash-link" aria-label="Direct link to Configuring Consumer Group Id" title="Direct link to Configuring Consumer Group Id"></a></h2><p>Kafka Consumers in Spring are configured using Kafka listeners. By default, consumer group id is same as listener id.</p><p>We've included an environment variable to customize the consumer group id, if your company or organization has specific naming rules.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="datahub-mce-consumer-and-datahub-mae-consumer">datahub-mce-consumer and datahub-mae-consumer<a href="#datahub-mce-consumer-and-datahub-mae-consumer" class="hash-link" aria-label="Direct link to datahub-mce-consumer and datahub-mae-consumer" title="Direct link to datahub-mce-consumer and datahub-mae-consumer"></a></h3><ul><li><code>KAFKA_CONSUMER_GROUP_ID</code>: The name of the kafka consumer's group id.</li></ul><h4 class="anchor anchorWithStickyNavbar_LWe7" id="datahub-mae-consumer-mcl-hooks">datahub-mae-consumer MCL Hooks<a href="#datahub-mae-consumer-mcl-hooks" class="hash-link" aria-label="Direct link to datahub-mae-consumer MCL Hooks" title="Direct link to datahub-mae-consumer MCL Hooks"></a></h4><p>By default, all MetadataChangeLog processing hooks execute as part of the same kafka consumer group based on the
|
||
previously mentioned <code>KAFKA_CONSUMER_GROUP_ID</code>.</p><p>The various MCL Hooks could alsp be separated into separate groups which allows for controlling parallelization and
|
||
prioritization of the hooks.</p><p>For example, the <code>UpdateIndicesHook</code> and <code>SiblingsHook</code> processing can be delayed by other hooks. Separating these
|
||
hooks into their own group can reduce latency from these other hooks. The <code>application.yaml</code> configuration
|
||
includes options for assigning a suffix to the consumer group, see <code>consumerGroupSuffix</code>.</p><table><thead><tr><th>Environment Variable</th><th>Default</th><th>Description</th></tr></thead><tbody><tr><td>SIBLINGS_HOOK_CONSUMER_GROUP_SUFFIX</td><td>''</td><td>Siblings processing hook. Considered one of the primary hooks in the <code>datahub-mae-consumer</code></td></tr><tr><td>UPDATE_INDICES_CONSUMER_GROUP_SUFFIX</td><td>''</td><td>Primary processing hook.</td></tr><tr><td>INGESTION_SCHEDULER_HOOK_CONSUMER_GROUP_SUFFIX</td><td>''</td><td>Scheduled ingestion hook.</td></tr><tr><td>INCIDENTS_HOOK_CONSUMER_GROUP_SUFFIX</td><td>''</td><td>Incidents hook.</td></tr><tr><td>ECE_CONSUMER_GROUP_SUFFIX</td><td>''</td><td>Entity Change Event hook which publishes to the Platform Events topic.</td></tr><tr><td>FORMS_HOOK_CONSUMER_GROUP_SUFFIX</td><td>''</td><td>Forms processing.</td></tr></tbody></table><h2 class="anchor anchorWithStickyNavbar_LWe7" id="applying-configurations">Applying Configurations<a href="#applying-configurations" class="hash-link" aria-label="Direct link to Applying Configurations" title="Direct link to Applying Configurations"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="docker">Docker<a href="#docker" class="hash-link" aria-label="Direct link to Docker" title="Direct link to Docker"></a></h3><p>Simply add the above environment variables to the required <code>docker.env</code> files for the containers. These can
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||
be found inside the <code>docker</code> folder of the repository.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="helm">Helm<a href="#helm" class="hash-link" aria-label="Direct link to Helm" title="Direct link to Helm"></a></h3><p>On Helm, you'll need to configure these environment variables using the <code>extraEnvs</code> sections of the specific container's
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||
configurations inside your <code>values.yaml</code> file.</p><div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">datahub-gms:</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> ...</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> extraEnvs:</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> - name: METADATA_CHANGE_PROPOSAL_TOPIC_NAME</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> value: "CustomMetadataChangeProposal_v1"</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> - name: METADATA_CHANGE_LOG_VERSIONED_TOPIC_NAME</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> value: "CustomMetadataChangeLogVersioned_v1"</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> - name: FAILED_METADATA_CHANGE_PROPOSAL_TOPIC_NAME</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> value: "CustomFailedMetadataChangeProposal_v1"</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> - name: KAFKA_CONSUMER_GROUP_ID</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> value: "my-apps-mae-consumer"</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> ....</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">datahub-frontend:</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> ...</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> extraEnvs:</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> - name: DATAHUB_TRACKING_TOPIC</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> value: "MyCustomTrackingEvent"</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># If standalone consumers are enabled</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">datahub-mae-consumer;</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> extraEnvs:</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> - name: METADATA_CHANGE_LOG_VERSIONED_TOPIC_NAME</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> value: "CustomMetadataChangeLogVersioned_v1"</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> ....</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> - name: METADATA_AUDIT_EVENT_NAME</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> value: "MetadataAuditEvent"</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">datahub-mce-consumer;</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> extraEnvs:</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> - name: METADATA_CHANGE_PROPOSAL_TOPIC_NAME</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> value: "CustomMetadataChangeLogVersioned_v1"</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> ....</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> - name: METADATA_CHANGE_EVENT_NAME</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> value: "MetadataChangeEvent"</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> ....</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="other-components-that-use-kafka-can-be-configured-using-environment-variables">Other Components that use Kafka can be configured using environment variables:<a href="#other-components-that-use-kafka-can-be-configured-using-environment-variables" class="hash-link" aria-label="Direct link to Other Components that use Kafka can be configured using environment variables:" title="Direct link to Other Components that use Kafka can be configured using environment variables:"></a></h2><ul><li>kafka-setup</li><li>schema-registry</li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="saslgssapi-properties-for-kafka-setup-and-datahub-frontend-via-environment-variables">SASL/GSSAPI properties for kafka-setup and datahub-frontend via environment variables<a href="#saslgssapi-properties-for-kafka-setup-and-datahub-frontend-via-environment-variables" class="hash-link" aria-label="Direct link to SASL/GSSAPI properties for kafka-setup and datahub-frontend via environment variables" title="Direct link to SASL/GSSAPI properties for kafka-setup and datahub-frontend via environment variables"></a></h2><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token assign-left variable" style="color:rgb(191, 199, 213)">KAFKA_BOOTSTRAP_SERVER</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">broker:29092</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">KAFKA_SCHEMAREGISTRY_URL</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">http://schema-registry:8081</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">KAFKA_PROPERTIES_SASL_KERBEROS_SERVICE_NAME</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">kafka</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">KAFKA_PROPERTIES_SECURITY_PROTOCOL</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">SASL_PLAINTEXT</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">KAFKA_PROPERTIES_SASL_JAAS_CONFIG</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">com.sun.security.auth.module.Krb5LoginModule required </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">principal</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token string" style="color:rgb(195, 232, 141)">'principal@REALM'</span><span class="token plain"> </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">useKeyTab</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">storeKey</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">keyTab</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token string" style="color:rgb(195, 232, 141)">'/keytab'</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="saslgssapi-properties-for-schema-registry-via-environment-variables">SASL/GSSAPI properties for schema-registry via environment variables<a href="#saslgssapi-properties-for-schema-registry-via-environment-variables" class="hash-link" aria-label="Direct link to SASL/GSSAPI properties for schema-registry via environment variables" title="Direct link to SASL/GSSAPI properties for schema-registry via environment variables"></a></h2><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token assign-left variable" style="color:rgb(191, 199, 213)">SCHEMA_REGISTRY_KAFKASTORE_BOOTSTRAP_SERVERS</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">broker:29092</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">SCHEMA_REGISTRY_KAFKASTORE_SASL_KERBEROS_SERVICE_NAME</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">kafka</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">SCHEMA_REGISTRY_KAFKASTORE_SECURITY_PROTOCOL</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">SASL_PLAINTEXT</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">SCHEMA_REGISTRY_KAFKASTORE_SASL_JAAS_CONFIG</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">com.sun.security.auth.module.Krb5LoginModule required </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">principal</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token string" style="color:rgb(195, 232, 141)">'principal@REALM'</span><span class="token plain"> </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">useKeyTab</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">storeKey</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token plain">true </span><span class="token assign-left variable" style="color:rgb(191, 199, 213)">keyTab</span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token string" style="color:rgb(195, 232, 141)">'/keytab'</span><span class="token punctuation" style="color:rgb(199, 146, 234)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="ssl">SSL<a href="#ssl" class="hash-link" aria-label="Direct link to SSL" title="Direct link to SSL"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="kafka">Kafka<a href="#kafka" class="hash-link" aria-label="Direct link to Kafka" title="Direct link to Kafka"></a></h3><p>We are using the Spring Boot framework to start our apps, including setting up Kafka. You can
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||
<a href="https://docs.spring.io/spring-boot/docs/current/reference/html/spring-boot-features.html#boot-features-external-config-relaxed-binding-from-environment-variables" target="_blank" rel="noopener noreferrer">use environment variables to set system properties</a>,
|
||
including <a href="https://docs.spring.io/spring-boot/docs/current/reference/html/appendix-application-properties.html#integration-properties" target="_blank" rel="noopener noreferrer">Kafka properties</a>.
|
||
From there you can set your SSL configuration for Kafka.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="schema-registry">Schema Registry<a href="#schema-registry" class="hash-link" aria-label="Direct link to Schema Registry" title="Direct link to Schema Registry"></a></h3><p>If Schema Registry is configured to use security (SSL), then you also need to set additional values.</p><p>The <a href="https://github.com/datahub-project/datahub/blob/master/metadata-jobs/mce-consumer-job" target="_blank" rel="noopener noreferrer">MCE</a> and <a href="https://github.com/datahub-project/datahub/blob/master/metadata-jobs/mae-consumer-job" target="_blank" rel="noopener noreferrer">MAE</a> consumers can set
|
||
default Spring Kafka environment values, for example:</p><ul><li><code>SPRING_KAFKA_PROPERTIES_SCHEMA_REGISTRY_SECURITY_PROTOCOL</code></li><li><code>SPRING_KAFKA_PROPERTIES_SCHEMA_REGISTRY_SSL_KEYSTORE_LOCATION</code></li><li><code>SPRING_KAFKA_PROPERTIES_SCHEMA_REGISTRY_SSL_KEYSTORE_PASSWORD</code></li><li><code>SPRING_KAFKA_PROPERTIES_SCHEMA_REGISTRY_SSL_TRUSTSTORE_LOCATION</code></li><li><code>SPRING_KAFKA_PROPERTIES_SCHEMA_REGISTRY_SSL_TRUSTSTORE_PASSWORD</code></li></ul><p><a href="/docs/what/gms">GMS</a> can set the following environment variables that will be passed as properties when creating the Schema Registry
|
||
Client.</p><ul><li><code>KAFKA_SCHEMA_REGISTRY_SECURITY_PROTOCOL</code></li><li><code>KAFKA_SCHEMA_REGISTRY_SSL_KEYSTORE_LOCATION</code></li><li><code>KAFKA_SCHEMA_REGISTRY_SSL_KEYSTORE_PASSWORD</code></li><li><code>KAFKA_SCHEMA_REGISTRY_SSL_TRUSTSTORE_LOCATION</code></li><li><code>KAFKA_SCHEMA_REGISTRY_SSL_TRUSTSTORE_PASSWORD</code></li></ul><blockquote><p><strong>Note</strong> In the logs you might see something like
|
||
<code>The configuration 'kafkastore.ssl.truststore.password' was supplied but isn't a known config.</code> The configuration is
|
||
not a configuration required for the producer. These WARN message can be safely ignored. Each of Datahub services are
|
||
passed a full set of configuration but may not require all the configurations that are passed to them. These warn
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messages indicate that the service was passed a configuration that is not relevant to it and can be safely ignored.</p></blockquote><blockquote><p>Other errors: <code>Failed to start bean 'org.springframework.kafka.config.internalKafkaListenerEndpointRegistry'; nested exception is org.apache.kafka.common.errors.TopicAuthorizationException: Not authorized to access topics: [DataHubUsageEvent_v1]</code>. Please check ranger permissions or kafka broker logs.</p></blockquote></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="slackUtm_uoBr"><div class="slackUtm_uoBr"><hr>Need more help? 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class="table-of-contents__link toc-highlight">Connection Configuration</a></li><li><a href="#topic-configuration" class="table-of-contents__link toc-highlight">Topic Configuration</a></li><li><a href="#metadata-service-datahub-gms" class="table-of-contents__link toc-highlight">Metadata Service (datahub-gms)</a></li><li><a href="#mce-consumer-datahub-mce-consumer" class="table-of-contents__link toc-highlight">MCE Consumer (datahub-mce-consumer)</a></li><li><a href="#mae-consumer-datahub-mae-consumer" class="table-of-contents__link toc-highlight">MAE Consumer (datahub-mae-consumer)</a></li><li><a href="#datahub-frontend-datahub-frontend-react" class="table-of-contents__link toc-highlight">DataHub Frontend (datahub-frontend-react)</a></li></ul></li><li><a href="#configuring-consumer-group-id" class="table-of-contents__link toc-highlight">Configuring Consumer Group Id</a><ul><li><a href="#datahub-mce-consumer-and-datahub-mae-consumer" class="table-of-contents__link 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