feat: add basic openlineage support

CHANGELOG.md

@@ -8,6 +8,7 @@ All notable changes to this project will be documented in this file.
 
 - BREAKING: Add required CLI argument and env var to set the image repository used to construct final product image names: `IMAGE_REPOSITORY` (`--image-repository`), eg. `oci.example.org/my/namespace` ([#684]).
 - Support for Spark `4.1.2` ([#708])
+- Add `spec.openLineage` to enable OpenLineage lineage emission: injects the OpenLineage Spark listener, HTTP transport (endpoint resolved from a discovery ConfigMap), a stable job name, and the required `--add-opens` JVM flag ([#XXXX]).
 
 ### Fixed
 
@@ -44,6 +45,7 @@ All notable changes to this project will be documented in this file.
 [#705]: https://github.com/stackabletech/spark-k8s-operator/pull/705
 [#708]: https://github.com/stackabletech/spark-k8s-operator/pull/708
 [#716]: https://github.com/stackabletech/spark-k8s-operator/pull/716
+[#XXXX]: https://github.com/stackabletech/spark-k8s-operator/pull/XXXX
 
 ## [26.3.0] - 2026-03-16
 

docs/modules/spark-k8s/pages/usage-guide/openlineage.adoc

@@ -0,0 +1,73 @@
+= OpenLineage
+
+https://openlineage.io/[OpenLineage] is an open standard for data lineage collection.
+The Spark operator can automatically emit lineage events for a `SparkApplication` to an OpenLineage-compatible backend such as https://marquezproject.github.io/marquez/[Marquez], without any manual `sparkConf` wiring.
+
+When enabled, the operator injects everything required to make the https://openlineage.io/docs/integrations/spark/[OpenLineage Spark listener] work:
+
+* the OpenLineage Spark listener (appended to `spark.extraListeners`, so any listener you configure yourself is preserved),
+* the OpenLineage jar baked into the Spark image, referenced via `spark.jars` so it shares the same classloader as connectors pulled in through xref:usage-guide/job-dependencies.adoc[`deps.packages`] (for example Apache Iceberg),
+* an HTTP transport pointing at the backend endpoint,
+* a stable lineage namespace and job name (see <<job-name>>), and
+* the `--add-opens java.base/java.security=ALL-UNNAMED` JVM flag the listener requires on the driver and executors.
+
+== Enabling OpenLineage
+
+The backend endpoint is not configured on the `SparkApplication` directly.
+Instead, mirroring the xref:usage-guide/logging.adoc[vector aggregator discovery], the operator reads it from a discovery ConfigMap referenced by `configMapName`:
+
+[source,yaml]
+----
+apiVersion: spark.stackable.tech/v1alpha1
+kind: SparkApplication
+metadata:
+  name: orders-by-nation
+spec:
+  openLineage:
+    enabled: true # <1>
+    configMapName: marquez-discovery # <2>
+    # namespace: orders-lineage # <3>
+    # appName: orders-by-nation # <4>
+  ...
+----
+<1> Enable OpenLineage event emission. Defaults to `false`, in which case the operator emits nothing OpenLineage-related and behaviour is unchanged.
+<2> Name of a discovery ConfigMap holding the backend endpoint (see below).
+    Must be in the same namespace as the `SparkApplication`.
+<3> Optional. The OpenLineage namespace events are reported under.
+    Defaults to the application's Kubernetes namespace.
+<4> Optional. The stable OpenLineage job name (see <<job-name>>).
+
+The discovery ConfigMap holds the backend base URL under the `ADDRESS` key:
+
+.Example discovery ConfigMap
+[source,yaml]
+----
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: marquez-discovery
+data:
+  ADDRESS: http://marquez:5000 # <1>
+----
+<1> Base URL of the OpenLineage backend, for example the Marquez API service.
+
+Alternatively, you can set the endpoint directly through `sparkConf` (`spark.openlineage.transport.url`).
+If `enabled: true` and no endpoint can be resolved from either the discovery ConfigMap or `sparkConf`, reconciliation fails with a clear error rather than emitting a config that silently drops events.
+
+[#job-name]
+== Job name
+
+The OpenLineage job name is resolved in the following order:
+
+. `spec.openLineage.appName`, if set.
+. `spark.app.name` from `sparkConf`, if set.
+. `metadata.name` as a last resort.
+
+The last case additionally emits a Kubernetes warning event.
+Falling back to `metadata.name` is discouraged: if that name carries a timestamp or other run-specific suffix (as generated names often do), every run becomes a separate job in the backend and the run history fragments.
+Set `spec.openLineage.appName` (or `spark.app.name`) to a stable value to keep all runs of the same logical job together.
+
+== Overriding injected configuration
+
+Every injected value is a default that goes into the submit configuration *before* your xref:usage-guide/overrides.adoc[`sparkConf`] is merged, so any key you set yourself wins.
+`spark.extraListeners` and `spark.jars` are the exception: the operator *appends* to any value you provide (comma-merged) rather than overwriting it, so your own listeners and jars are kept alongside OpenLineage's.

docs/modules/spark-k8s/partials/nav.adoc

@@ -9,6 +9,7 @@
 ** xref:spark-k8s:usage-guide/app_templates.adoc[]
 ** xref:spark-k8s:usage-guide/security.adoc[]
 ** xref:spark-k8s:usage-guide/logging.adoc[]
+** xref:spark-k8s:usage-guide/openlineage.adoc[]
 ** xref:spark-k8s:usage-guide/history-server.adoc[]
 ** xref:spark-k8s:usage-guide/spark-connect.adoc[]
 ** xref:spark-k8s:usage-guide/examples.adoc[]

extra/crds.yaml

@@ -1957,6 +1957,42 @@ spec:
                 - cluster
                 - client
                 type: string
+              openLineage:
+                description: |-
+                  Emit [OpenLineage](https://openlineage.io/) lineage events for this application.
+                  The OpenLineage Spark listener runs on the driver and describes the whole application,
+                  so this is application-scoped config (not per driver/executor role).
+                  See the [OpenLineage usage guide](https://docs.stackable.tech/home/nightly/spark-k8s/usage-guide/openlineage).
+                nullable: true
+                properties:
+                  appName:
+                    description: |-
+                      A stable OpenLineage job/application name. Setting this prevents fragmented run history
+                      (and the intermittent `unknown` job-name bug). If unset, the operator resolves it from
+                      `spark.app.name`, falling back to `metadata.name` (with a warning event).
+                    nullable: true
+                    type: string
+                  configMapName:
+                    description: |-
+                      Name of the OpenLineage backend [discovery ConfigMap](https://docs.stackable.tech/home/nightly/concepts/service_discovery).
+                      It must contain the key `ADDRESS` with the base URL of the OpenLineage backend
+                      (e.g. `http://marquez:5000`). Mirrors the `vectorAggregatorConfigMapName` field on this CRD.
+                    maxLength: 253
+                    minLength: 1
+                    nullable: true
+                    pattern: ^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
+                    type: string
+                  enabled:
+                    default: false
+                    description: Enable OpenLineage event emission. Defaults to `false` (nothing is injected).
+                    type: boolean
+                  namespace:
+                    description: |-
+                      The OpenLineage namespace lineage is reported under.
+                      Defaults to the application's Kubernetes namespace (`metadata.namespace`).
+                    nullable: true
+                    type: string
+                type: object
               s3connection:
                 description: |-
                   Configure an S3 connection that the SparkApplication has access to.
@@ -6563,6 +6599,42 @@ spec:
                 - cluster
                 - client
                 type: string
+              openLineage:
+                description: |-
+                  Emit [OpenLineage](https://openlineage.io/) lineage events for this application.
+                  The OpenLineage Spark listener runs on the driver and describes the whole application,
+                  so this is application-scoped config (not per driver/executor role).
+                  See the [OpenLineage usage guide](https://docs.stackable.tech/home/nightly/spark-k8s/usage-guide/openlineage).
+                nullable: true
+                properties:
+                  appName:
+                    description: |-
+                      A stable OpenLineage job/application name. Setting this prevents fragmented run history
+                      (and the intermittent `unknown` job-name bug). If unset, the operator resolves it from
+                      `spark.app.name`, falling back to `metadata.name` (with a warning event).
+                    nullable: true
+                    type: string
+                  configMapName:
+                    description: |-
+                      Name of the OpenLineage backend [discovery ConfigMap](https://docs.stackable.tech/home/nightly/concepts/service_discovery).
+                      It must contain the key `ADDRESS` with the base URL of the OpenLineage backend
+                      (e.g. `http://marquez:5000`). Mirrors the `vectorAggregatorConfigMapName` field on this CRD.
+                    maxLength: 253
+                    minLength: 1
+                    nullable: true
+                    pattern: ^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
+                    type: string
+                  enabled:
+                    default: false
+                    description: Enable OpenLineage event emission. Defaults to `false` (nothing is injected).
+                    type: boolean
+                  namespace:
+                    description: |-
+                      The OpenLineage namespace lineage is reported under.
+                      Defaults to the application's Kubernetes namespace (`metadata.namespace`).
+                    nullable: true
+                    type: string
+                type: object
               s3connection:
                 description: |-
                   Configure an S3 connection that the SparkApplication has access to.

rust/operator-binary/src/config/jvm.rs

@@ -2,8 +2,8 @@ use stackable_operator::crd::s3;
 
 use crate::crd::{
     constants::{
-        JVM_SECURITY_PROPERTIES_FILE, STACKABLE_TLS_STORE_PASSWORD, STACKABLE_TRUST_STORE,
-        VOLUME_MOUNT_PATH_LOG_CONFIG,
+        JVM_SECURITY_PROPERTIES_FILE, OPENLINEAGE_ADD_OPENS, STACKABLE_TLS_STORE_PASSWORD,
+        STACKABLE_TRUST_STORE, VOLUME_MOUNT_PATH_LOG_CONFIG,
     },
     logdir::ResolvedLogDir,
     tlscerts::tls_secret_names,
@@ -36,6 +36,18 @@ pub fn construct_extra_java_options(
         ]);
     }
 
+    // OpenLineage on Spark 4.x needs `java.base/java.security` opened to the unnamed module,
+    // otherwise the driver throws a non-fatal `InaccessibleObjectException` and silently degrades
+    // extension-interface lineage (MVP §7). Added to both driver and executor.
+    if spark_application
+        .spec
+        .open_lineage
+        .as_ref()
+        .is_some_and(|open_lineage| open_lineage.enabled)
+    {
+        jvm_args.push(OPENLINEAGE_ADD_OPENS.to_string());
+    }
+
     // The role's `jvmArgumentOverrides` are applied on top of the operator-generated arguments
     // above. Note this is not purely additive: a role may also remove or replace operator-set
     // arguments (e.g. a `removeRegex` dropping the `-Djava.security.properties` default) — see the
@@ -132,4 +144,30 @@ mod tests {
             "-Dhttps.proxyHost=from-executor"
         );
     }
+
+    #[test]
+    fn test_construct_jvm_arguments_openlineage_add_opens() {
+        let input = r#"
+            apiVersion: spark.stackable.tech/v1alpha1
+            kind: SparkApplication
+            metadata:
+              name: spark-example
+            spec:
+              mode: cluster
+              mainApplicationFile: test.py
+              sparkImage:
+                productVersion: 1.2.3
+              openLineage:
+                enabled: true
+        "#;
+
+        let deserializer = serde_yaml::Deserializer::from_str(input);
+        let spark_app: SparkApplication =
+            serde_yaml::with::singleton_map_recursive::deserialize(deserializer).unwrap();
+        let (driver_extra_java_options, executor_extra_java_options) =
+            construct_extra_java_options(&spark_app, &None, &None);
+
+        assert!(driver_extra_java_options.contains(OPENLINEAGE_ADD_OPENS));
+        assert!(executor_extra_java_options.contains(OPENLINEAGE_ADD_OPENS));
+    }
 }

rust/operator-binary/src/crd/constants.rs

@@ -103,6 +103,30 @@ pub const DEFAULT_LISTENER_CLASS: &str = "cluster-internal";
 
 pub const DEFAULT_SUBMIT_JOB_RETRY_ON_FAILURE_COUNT: u16 = 0;
 
+// --- OpenLineage (see the OpenLineage usage guide) ---
+
+/// The OpenLineage Spark listener, appended to `spark.extraListeners` when OpenLineage is enabled.
+pub const OPENLINEAGE_LISTENER_CLASS: &str = "io.openlineage.spark.agent.OpenLineageSparkListener";
+
+/// `local://` URI of the OpenLineage jar baked into the Spark image, referenced via `spark.jars` so
+/// it shares the (child) classloader with `--packages` connectors. Delivering it this way — rather
+/// than on `extraClassPath` (system classloader) — is what lets OpenLineage's connector probes
+/// succeed; see the classpath discussion in the OpenLineage usage guide.
+///
+/// IMPORTANT: the version MUST stay in sync with the `openlineage-spark-version` build-argument in
+/// `docker-images/spark-k8s/boil-config.toml` (the image is what places the jar at this path).
+pub const OPENLINEAGE_JAR_LOCAL_URI: &str =
+    "local:///stackable/spark/openlineage/openlineage-spark_2.13-1.51.0.jar";
+
+/// The key the OpenLineage discovery ConfigMap must hold, carrying the backend base URL. Mirrors the
+/// `ADDRESS` contract of the existing `vectorAggregatorConfigMapName` discovery ConfigMap.
+pub const OPENLINEAGE_CONFIG_MAP_ADDRESS_KEY: &str = "ADDRESS";
+
+/// Java module-system flag OpenLineage requires on Spark 4.x: without it the driver throws a
+/// non-fatal `InaccessibleObjectException` and silently degrades extension-interface lineage.
+/// Appended to both driver and executor `extraJavaOptions`.
+pub const OPENLINEAGE_ADD_OPENS: &str = "--add-opens java.base/java.security=ALL-UNNAMED";
+
 /// The JVM `security.properties` entries the operator sets by default (DNS cache TTLs).
 pub fn default_jvm_security_properties() -> BTreeMap<String, String> {
     [