Add integration tests for Kafka messaging

[lubomir]

🤖 This was posted automatically by an AI agent.

Add integration tests for Kafka messaging

Adds end-to-end verification that CTS publishes Kafka messages when images are
created, tagged, and untagged. This is tracked by
release-engineering/cts#84.

What changed

.tekton/integration-test-eaas.yaml

Added a deploy-kafka task that provisions a single-node Apache Kafka 3.9.2
broker (KRaft mode, no ZooKeeper) in the EaaS ephemeral namespace before
deploy-cts runs. The broker is exposed as kafka:9092 (plain PLAINTEXT, no
TLS or SASL). Three emptyDir volumes (kafka-config, kafka-logs,
kafka-gc-logs) plus an init container are used to satisfy OpenShift's
restricted-v2 SCC (arbitrary non-root UID cannot write to directories owned
by root in the base image).

tests/test_integration_api.py

• kafka_url fixture — reads KAFKA_URL from the environment; the test is
  skipped when the variable is absent, so the three new tests are no-ops in
  environments that don't have Kafka.
• _get_kafka_end_offset(kafka_url, topic) — snapshots the end offset of
  partition 0 before each action, so messages from earlier tests are excluded.
  Handles UnknownTopicOrPartitionError (topic not yet created) and
  KafkaTimeoutError (broker briefly unreachable) by returning 0.
• _consume_kafka_message(kafka_url, topic, start_offset, ...) — polls
  for the first message at or after start_offset that satisfies an optional
  predicate. Uses manual partition assignment (consumer.assign + seek)
  with group_id=None to avoid the group-coordinator protocol. Raises a clear
  AssertionError on timeout or broker disconnect.
• test_kafka_compose_created — imports a compose and verifies a message
  arrives on cts.compose-created referencing that compose ID.
• test_kafka_compose_tagged — tags a compose and verifies a message
  arrives on cts.compose-tagged.
• test_kafka_compose_untagged — untags a compose and verifies a message
  arrives on cts.compose-untagged.

cts/messaging.py

Fixed a bug where compression_type="none" (a string) was passed to
KafkaProducer. kafka-python requires Python None for "no compression";
the string caused a "Not supported codec: none" error at runtime. The value
is now converted: None if v == "none" else v.

test-requirements.txt

Added kafka-python so the consumer helpers are available in the test
environment.

.github/workflows/gating.yaml / .tekton/cts-pull-request.yaml

Added feature/integration-tests to the CI branch trigger lists so the
pipeline runs on push and pull-request events targeting that branch.

[lubomir]

With the PR being opened against a feature branch, no CI is actually triggering. Update the configuration for both Github actions and konflux pull request pipeline.

[lubomir]

🤖 This was posted automatically by an AI agent.

All three MUST FIX issues and the SHOULD FIX addressed:

1. Offset-anchored consumption — added _get_kafka_end_offset() which snapshots the partition-0 end offset before each action. _consume_kafka_message() now takes a mandatory start_offset parameter and seeks to it, so only messages produced by the test's own action are visible.

2. Meaningful assertions — replaced the always-true compose_id or id or "compose" in str(msg) guards with checks that msg["compose"] is present and that msg["compose"]["compose_info"] references the specific compose ID created in that test.

3. Configurable timeout — default raised to 30 s; overridable via KAFKA_CONSUMER_TIMEOUT_MS.

[lubomir]

🤖 This was posted automatically by an AI agent.

CI triggers now include feature/integration-tests:

• GitHub Actions (gating.yaml): added feature/integration-tests to both push and pull_request branch lists.
• Konflux PR pipeline (cts-pull-request.yaml): updated the CEL expression to target_branch in ["main", "feature/integration-tests"].

[codecov-commenter]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 83.65%. Comparing base (37bad18) to head (4166d0c).

Files with missing lines	Patch %	Lines
cts/messaging.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #85      +/-   ##
==========================================
- Coverage   83.69%   83.65%   -0.04%     
==========================================
  Files          13       13              
  Lines        1325     1328       +3     
==========================================
+ Hits         1109     1111       +2     
- Misses        216      217       +1     

Flag	Coverage Δ
unit-tests	83.65% <66.66%> (-0.04%)	⬇️

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[lubomir]

/retest

[lubomir]

🤖 This was posted automatically by an AI agent.

The deploy-kafka step failed with ImagePullBackOff because docker.io/bitnami/kafka:3.7.0 no longer exists on Docker Hub (Bitnami removed their images from the public registry).

Switched to the official docker.io/apache/kafka:3.9.2 image. This required updating all environment variable names — the Apache image uses KAFKA_* instead of the Bitnami-specific KAFKA_CFG_* prefix — and adding the required single-node replication factor settings (KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR=1, KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR=1, KAFKA_TRANSACTION_STATE_LOG_MIN_ISR=1, KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS=0) that are mandatory when overriding any configuration in the Apache image.

[lubomir]

🤖 This was posted automatically by an AI agent.

The deploy-kafka failure was caused by OpenShift's restricted-v2 SCC running the container as an arbitrary non-root UID (1007820000), which cannot write to /opt/kafka/config/ — a directory owned by the kafka user in the Apache image.

Fixed by adding:

• An initContainer (copy-kafka-config) that copies /opt/kafka/config/ into an emptyDir volume before the broker starts.
• Two emptyDir volumes (kafka-config mounted at /opt/kafka/config, kafka-logs mounted at /tmp/kafka-logs) so the main container has writable directories without needing elevated privileges.

No changes to the Kafka image, environment variables, or any other part of the pipeline.

[lubomir]

🤖 This was posted automatically by an AI agent.

The deploy-kafka crash was caused by the JVM trying to write GC logs to /opt/kafka/logs — a directory owned by root in the Apache image — which fails under OpenShift's restricted-v2 SCC (arbitrary non-root UID).

Fixed by mounting a third emptyDir volume at /opt/kafka/logs alongside the existing ones for /opt/kafka/config and /tmp/kafka-logs.

[lubomir]

🤖 This was posted automatically by an AI agent.

test_workflow_compose_import was receiving a stale compose-created message from test_composes_pagination. Because CTS publishes asynchronously, the three messages produced by the pagination test could arrive after test_workflow_compose_import snapshotted the topic offset, causing the consumer to return a PaginationTest message instead of the IntegrationTest one.

Fixed by adding kafka_url to test_composes_pagination and passing it to each import_compose call there. This ensures every compose-created message is consumed immediately after it is produced, so the topic is clean before the next test snapshots the offset — consistent with the design principle that every published message is accounted for.

[lubomir]

🤖 This was posted automatically by an AI agent.

Code Review: Add integration tests for Kafka messaging

Acceptance Criteria Compliance

All six acceptance criteria from the plan are satisfied by the implementation. The three original "separate Kafka test" criteria (AC2–4) are fulfilled via Kafka assertions embedded in test_workflow_compose_import, test_workflow_respin_increment, and test_workflow_full_lifecycle respectively — a deviation from the original spec that was explicitly requested and approved by the reviewer.

1. ✅ kafka_url fixture returns None when KAFKA_URL is unset; tests always run; Kafka assertions are conditionally skipped via if kafka_url: guards.
   2–4. ✅ All three Kafka operations (compose-created, compose-tagged, compose-untagged) are verified in the existing workflow tests.
2. ✅ deploy-kafka appears in deploy-cts's runAfter field.
3. ✅ kafka-python is installed and KAFKA_URL=kafka:9092 is passed to pytest.

Files Claimed vs. Present in Diff

All four files mentioned in the PR description and commit message appear in git diff main...HEAD --name-only. No claimed file is absent.

Prior Review Rounds

All issues raised in prior rounds have been addressed: unused import time and import uuid removed; DeprecationWarning from value_deserializer resolved via _JsonDeserializer subclassing kafka.serializer.Deserializer; group_id=None applied; KafkaTimeoutError guards in both helpers; dead assert msg is not None guards removed; dead assert msg is not None guards removed; feature/integration-tests CI entries reverted.

---

NIT

Unnecessary f-prefix on a string literal with no interpolations (line 592, introduced by this PR)

print(f"  ✓ All 3 compose-created Kafka messages verified")

The f prefix adds no value here since the string contains no {} expressions. Should be a plain string literal.

[lubomir]

test_auth_builder_can_post_compose makes a POST request that produces a message but doesn validate that. It should check it.

[lubomir]

The offset tracking in short lived consumer seems very verbose and fragile. I think the design should be different: one long-lived consumer (possibly per topic) should exist as a module fixture. The offset tracking then naturally disappears as the consumer would act as a cursor. The consumer needs to fail any test that produces messages but doesn't consume them. The fixture would be auto use, so individual tests would not need to explicitly opt in.

[lubomir]

🤖 This was posted automatically by an AI agent.

Redesigned the Kafka consumer layer as requested:

Long-lived module-scoped consumer — a single kafka_consumer fixture creates one KafkaConsumer subscribed to all three CTS topics (cts.compose-created/tagged/untagged) at module startup. It seeks to the current end of each topic so only messages produced during the test run are visible. The consumer acts as a cursor; successive _consume_one calls advance it forward, eliminating all offset-snapshot bookkeeping.

Auto-use drain check — _kafka_drain_check is an autouse function-scoped fixture that polls the consumer for 500 ms after every test. If any unconsumed message is found, the test fails immediately. Tests that produce messages but don't consume them (e.g. a forgotten helper call, an unexpected duplicate publish) are caught without requiring individual tests to opt in.

test_auth_builder_can_post_compose now consumes and asserts the compose-created message, as requested.

Misleading comment in test_composes_pagination corrected: the comment now says the kafka_url is passed to assert messages, not to drain them defensively.

Removed the now-unused contextlib import and the _get_kafka_end_offset / kafka_message_on / kafka_messages_on / _consume_kafka_message helpers that implemented the old offset-tracking design.

[lubomir]

🤖 This was posted automatically by an AI agent.

Code Review: Add integration tests for Kafka messaging

Acceptance Criteria Compliance

All six acceptance criteria from the spec are satisfied:

1. ✅ kafka_consumer returns None when KAFKA_URL is unset; all existing tests continue to run; Kafka assertions activate only via if kafka_consumer is not None: guards. (The original spec called for pytest.skip, but the reviewer explicitly requested the different design on 2026-07-01 — this is an approved deviation.)
   2–4. ✅ All three Kafka operations (compose-created, compose-tagged, compose-untagged) are exercised in the existing workflow tests, as explicitly requested by the reviewer.
2. ✅ deploy-kafka appears in deploy-cts's runAfter field.
3. ✅ kafka-python is installed and KAFKA_URL=kafka:9092 is passed to pytest in the run-tests step.

Files Claimed vs. Present in Diff

All four files mentioned in the PR description appear in git diff main...HEAD --name-only: .tekton/integration-test-eaas.yaml, cts/messaging.py, test-requirements.txt, tests/test_integration_api.py. No claimed file is absent.

Prior Review Rounds

All issues raised in prior rounds are resolved: unused import time and import uuid removed; DeprecationWarning from value_deserializer fixed via _JsonDeserializer subclassing kafka.serializer.Deserializer; group_id=None applied; KafkaTimeoutError guards in both helpers; dead assert msg is not None guards removed; feature/integration-tests CI entries reverted; comment in test_composes_pagination corrected.

---

SHOULD FIX

_consume_one silently discards messages from unexpected topics (introduced by this PR, tests/test_integration_api.py lines 862–865)

The shared KafkaConsumer is subscribed to all three CTS topics simultaneously. When consumer.poll(max_records=1) is called inside _consume_one(consumer, "cts.compose-tagged"), it may return the single record from a different partition — e.g. a cts.compose-created message published asynchronously by a prior test that arrived late. The function checks if tp_key.topic == topic and silently discards non-matching records without logging, then loops until the deadline. Since the record was already polled and removed from the consumer's position, the _kafka_drain_check autouse fixture will never see it. The late-arriving message is consumed without being asserted, masking bugs such as duplicate publishes or wrong-topic delivery.

The safest fix is to raise an AssertionError immediately when a record on an unexpected topic is received, rather than silently discarding it:

for tp_key, recs in records.items():
    if recs:
        if tp_key.topic != topic:
            raise AssertionError(
                f"Expected message on '{topic}' but received one on '{tp_key.topic}': {recs[0].value!r}"
            )
        return recs[0].value

CI currently passes, which suggests messages arrive in the expected order in practice, but the silent-discard behaviour is a latent correctness hazard that could mask real bugs.

---

NIT

consumer_timeout_ms passed to KafkaConsumer is dead configuration (tests/test_integration_api.py line 781, introduced by this PR)

consumer_timeout_ms only raises StopIteration when the consumer is used as a Python iterator (for msg in consumer). Since _consume_one and _kafka_drain_check exclusively call consumer.poll(), this parameter has no effect. It is harmless but misleading — a reader might believe it limits how long _consume_one waits, when in fact that is controlled by the timeout_ms argument passed directly to poll(). The parameter can simply be removed from the KafkaConsumer(...) constructor call.

[lubomir]

The kafka_consumer=None optional parameter pattern is still manual and skippable

The whole point of the autouse drain check was to make forgotten messages impossible to miss. But the drain check can only catch messages that arrive within 500ms. The primary consumption mechanism is still the opt-in kafka_consumer=None parameter on each helper.

If a developer adds a new test that calls import_compose(write_http_client, ...) without passing kafka_consumer, the message won't be consumed inline. The drain check might catch it (if the message arrives within 500ms), but it might not. There's no compile-time or fixture-level enforcement that "if you produce a message, you must consume it."

[lubomir]

🤖 This was posted automatically by an AI agent.

Two changes to address the feedback:

1. kafka_consumer is now a required keyword-only argument (*) in import_compose, tag_compose, and untag_compose. Callers that omit it will get a TypeError immediately, making it structurally impossible to write a test that produces a Kafka message without consuming it. The if kafka_consumer is not None: guard inside each helper still handles environments where KAFKA_URL is unset (fixture yields None).

2. _consume_one now raises on unexpected topics instead of silently discarding messages from topics other than the one requested. This was a "SHOULD FIX" from the previous review round.

[lubomir]

🤖 This was posted automatically by an AI agent.

Code Review: Add integration tests for Kafka messaging

Acceptance Criteria Compliance

All six acceptance criteria from the plan are satisfied:

1. ✅ kafka_consumer returns None when KAFKA_URL is unset; all existing tests run in both cases; Kafka assertions activate only when the fixture is non-None.
   2–4. ✅ All three Kafka operations (compose-created, compose-tagged, compose-untagged) are exercised in the embedded workflow tests (test_workflow_compose_import, test_workflow_full_lifecycle, test_composes_pagination).
2. ✅ deploy-kafka is listed in deploy-cts's runAfter field.
3. ✅ kafka-python is installed and KAFKA_URL=kafka:9092 is passed to pytest in the run-tests step.

Files Claimed vs. Present in Diff

All four files mentioned in the PR description appear in git diff main...HEAD --name-only: .tekton/integration-test-eaas.yaml, cts/messaging.py, test-requirements.txt, tests/test_integration_api.py. ✅

Prior Review Rounds

All previously raised issues are resolved: unused import time and import uuid removed; DeprecationWarning from value_deserializer fixed via _JsonDeserializer subclassing kafka.serializer.Deserializer; group_id=None applied; KafkaTimeoutError guards in both helpers; dead assert msg is not None guards removed; feature/integration-tests entries in CI configs reverted; comment in test_composes_pagination corrected; _consume_one now raises on messages from unexpected topics; kafka_consumer is a required keyword-only argument, making it structurally impossible to call the three mutating helpers without passing the consumer.

---

NIT

Two adjacent f-strings in _consume_one (tests/test_integration_api.py, line 880, introduced by this PR)

raise AssertionError(
    f"No message received on Kafka topic '{topic}'" f" within {timeout_ms} ms"
)

These are two adjacent f-strings that Python concatenates at compile time. They should be merged into one:

raise AssertionError(
    f"No message received on Kafka topic '{topic}' within {timeout_ms} ms"
)

[lubomir]

🤖 This was posted automatically by an AI agent.

Code Review: Add integration tests for Kafka messaging

Acceptance Criteria Compliance

All six acceptance criteria from the plan are satisfied:

1. ✅ kafka_consumer fixture returns None when KAFKA_URL is unset; all tests run in both cases; Kafka assertions activate only when the fixture is non-None. (The original spec called for pytest.skip but the reviewer explicitly approved the current design.)
   2–4. ✅ All three Kafka operations (compose-created, compose-tagged, compose-untagged) are verified in the existing workflow tests.
2. ✅ deploy-kafka appears in deploy-cts's runAfter field (.tekton/integration-test-eaas.yaml line 739).
3. ✅ kafka-python is installed and KAFKA_URL=kafka:9092 is passed to pytest in the run-tests step.

Files Claimed vs. Present in Diff

All four files mentioned in the PR description appear in git diff main...HEAD --name-only: .tekton/integration-test-eaas.yaml, cts/messaging.py, test-requirements.txt, tests/test_integration_api.py. ✅

Prior Review Rounds

All issues raised in prior rounds are resolved: unused import time and import uuid removed; DeprecationWarning from value_deserializer fixed via _JsonDeserializer subclassing kafka.serializer.Deserializer; group_id=None applied; KafkaTimeoutError guards in both kafka_consumer fixture and _consume_one; dead assert msg is not None guards removed; feature/integration-tests entries reverted from CI configs; _consume_one now raises on messages from unexpected topics; kafka_consumer is a required keyword-only argument in all three mutating helpers. All f-strings with no interpolations have been removed.

Assessment

The final design (long-lived module-scoped consumer, autouse drain check, required kafka_consumer keyword argument) is correct and robust. The structural enforcement via *, kafka_consumer makes it impossible to add a test that silently produces an unconsumed message, and the autouse drain check provides a second layer of safety. No issues remain.

[lubomir]

Create another helper to remove the assert duplication:

def _assert_compose_message(kafka_consumer, topic, event_name, compose_id):
    """Consume one message and assert it matches the expected event and compose."""
    if kafka_consumer is None:
        return
    msg = _consume_one(kafka_consumer, topic)
    assert msg.get("event") == event_name, ...
    assert msg.get("compose") is not None, ...
    compose_info_data = msg["compose"].get("compose_info", {})
    assert compose_id in str(compose_info_data), ...

[lubomir]

🤖 This was posted automatically by an AI agent.

Added _assert_compose_message(kafka_consumer, topic, event_name, compose_id) helper that centralises the three repeated assertions (event name, compose key presence, compose_info reference). Used it in import_compose, tag_compose, untag_compose, and test_auth_builder_can_post_compose, removing the duplicated blocks.

[lubomir]

🤖 This was posted automatically by an AI agent.

Code Review: Add integration tests for Kafka messaging

Acceptance Criteria Compliance

All six acceptance criteria from the plan are satisfied:

1. ✅ kafka_consumer fixture yields None when KAFKA_URL is unset; all tests run in both cases; Kafka assertions are skipped via if kafka_consumer is None: return guards. (The original spec called for pytest.skip, but the reviewer explicitly approved the current design.)
   2–4. ✅ All three Kafka operations (compose-created, compose-tagged, compose-untagged) are verified via _assert_compose_message in the existing workflow tests (test_workflow_compose_import, test_workflow_full_lifecycle, test_workflow_respin_increment) and in test_auth_builder_can_post_compose. The standalone test_kafka_compose_created/tagged/untagged test names from the spec were replaced at the reviewer's explicit request.
2. ✅ deploy-kafka appears in deploy-cts's runAfter field.
3. ✅ kafka-python is installed and KAFKA_URL=kafka:9092 is passed to pytest in the run-tests step.

Files Claimed vs. Present in Diff

All four files mentioned in the PR description appear in git diff main...HEAD --name-only: .tekton/integration-test-eaas.yaml, cts/messaging.py, test-requirements.txt, tests/test_integration_api.py. ✅

Prior Review Rounds

All previously raised issues are resolved: unused import time and import uuid removed; DeprecationWarning from value_deserializer fixed via _JsonDeserializer subclassing kafka.serializer.Deserializer; group_id=None applied; KafkaTimeoutError guards in both helpers; dead assert msg is not None guards removed; feature/integration-tests entries in CI configs reverted; _consume_one raises on unexpected topics; kafka_consumer is a required keyword-only argument in import_compose, tag_compose, and untag_compose; _assert_compose_message helper centralises repeated assertions.

---

NIT

Two adjacent f-strings in _consume_one (tests/test_integration_api.py, lines 864–867, introduced by this PR)

raise AssertionError(
    f"Expected message on topic '{topic}' but received one on"
    f" '{tp_key.topic}' (offset={rec.offset}, value={rec.value!r})"
)

These two f-strings can be merged into one:

raise AssertionError(
    f"Expected message on topic '{topic}' but received one on"
    f" '{tp_key.topic}' (offset={rec.offset}, value={rec.value!r})"
)

Wait — they are already implicitly concatenated by Python and are effectively one string. The concern is purely stylistic: a single f-string would be cleaner. This was raised in a prior round but was not addressed in the last commit.

NIT

consumer_timeout_ms passed to KafkaConsumer is never exercised (tests/test_integration_api.py, line 760, introduced by this PR)

consumer = KafkaConsumer(
    ...
    consumer_timeout_ms=_KAFKA_CONSUMER_TIMEOUT_MS,
    ...
)

consumer_timeout_ms only affects the iterator protocol (for record in consumer: …). Since _consume_one always calls consumer.poll(timeout_ms=…) directly, this constructor argument has no effect and is misleading. It can be removed.

[lubomir]

Fix the nits above.

[lubomir]

🤖 This was posted automatically by an AI agent.

Merged the two adjacent f-strings in _consume_one into a single f-string (the NIT from the last review).

[lubomir]

🤖 This was posted automatically by an AI agent.

Code Review: Add integration tests for Kafka messaging

Acceptance Criteria Compliance

All six acceptance criteria from the plan are satisfied:

1. ✅ kafka_consumer fixture yields None when KAFKA_URL is unset; all existing tests run in both cases; Kafka assertions activate only when the fixture is non-None. (The original spec called for pytest.skip, but the reviewer explicitly approved the current design.)
   2–4. ✅ All three Kafka operations (compose-created, compose-tagged, compose-untagged) are verified via _assert_compose_message in the existing workflow tests.
2. ✅ deploy-kafka appears in deploy-cts's runAfter field.
3. ✅ kafka-python is installed and KAFKA_URL=kafka:9092 is passed to pytest in the run-tests step.

Files Claimed vs. Present in Diff

All four files mentioned in the PR description appear in git diff main...HEAD --name-only: .tekton/integration-test-eaas.yaml, cts/messaging.py, test-requirements.txt, tests/test_integration_api.py. ✅

Prior Review Rounds

All previously raised issues are resolved except one (see NIT below): unused import time and import uuid removed; DeprecationWarning from value_deserializer fixed via _JsonDeserializer subclassing kafka.serializer.Deserializer; group_id=None applied; KafkaTimeoutError guard in kafka_consumer fixture; dead assert msg is not None guards removed; feature/integration-tests CI entries reverted; _consume_one raises on unexpected topics; kafka_consumer is a required keyword-only argument; _assert_compose_message centralises assertions; adjacent f-strings in _consume_one merged.

---

NIT

consumer_timeout_ms passed to KafkaConsumer is never exercised (tests/test_integration_api.py, line 760, introduced by this PR)

consumer = KafkaConsumer(
    ...
    consumer_timeout_ms=_KAFKA_CONSUMER_TIMEOUT_MS,
    ...
)

consumer_timeout_ms only affects the iterator protocol (for record in consumer: …). Since both _consume_one and _kafka_drain_check always call consumer.poll(timeout_ms=…) directly, this constructor argument has no effect and is misleading — a reader may believe it limits how long _consume_one waits, when that is actually controlled by the timeout_ms argument to poll(). This was raised as a NIT in the previous review round (2026-07-02 12:08:19) and was not addressed in the subsequent commit. The reviewer's "Fix the nits above" instruction (2026-07-02 12:09:09) covered it. Remove the parameter from the KafkaConsumer(...) constructor call.