Drop Airflow 2.5 support#2165
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Pull request overview
This PR removes support for Apache Airflow 2.5, aligning with the Airflow community's provider package requirements (apache-airflow>=2.10) and Astronomer Runtime's EOL schedule. The minimum supported Airflow version is now 2.6.0.
Key changes:
- Updated minimum Airflow dependency from 2.5.0 to 2.6.0
- Removed Airflow 2.5 from test matrices and CI workflows
- Simplified test utilities by removing version checks for Airflow < 2.5
Reviewed changes
Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
| pyproject.toml | Updated minimum apache-airflow dependency to >=2.6.0 and removed 2.5 from test matrix |
| CHANGELOG.rst | Documented the breaking change for dropping Airflow 2.5 support |
| .github/workflows/test.yml | Removed Airflow 2.5 from test matrix and related Python version exclusions |
| scripts/test/pre-install-airflow.sh | Removed Airflow 2.5 from conditional installation logic |
| tests/utils.py | Refactored test_dag function to remove Airflow < 2.5 version checks |
| tests/operators/test_virtualenv.py | Removed skipif decorator that was only relevant for Airflow < 2.5 |
| tests/operators/test_local.py | Updated test to remove custom_tester parameter |
| tests/_triggers/test_watcher.py | Updated test parameter from Airflow 2.5.0 to 2.11.0 for version comparison |
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pankajastro
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Nov 26, 2025
pankajastro
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Nov 26, 2025
pankajastro
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Nov 26, 2025
tatiana
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Nov 26, 2025
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tatiana
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Looks great, @pankajastro , thank you! Do we have a follow-up ticket to clean our test utils?
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Created #2166 to tract it |
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pankajkoti
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Dec 18, 2025
Breaking changes * Introduced in the PR #2080. The following functions are expected to be used internally only to Cosmos, so we hope these won't impact end-users, but we are documenting the changes just in case: - ``generate_task_or_group`` receives ``render_config`` instead of its individual configurations, such as ``test_behavior``, ``source_rendering_behavior`` and ``enable_owner_inheritance`` - ``create_task_metadata`` receives ``render_config`` instead of its individual configurations, such as ``test_behavior``, ``source_rendering_behavior`` and ``enable_owner_inheritance`` - ``create_task_metadata`` now expects the ``node_converters`` argument * Drop Python 3.9 support by @pankajastro in #2118 * Drop Airflow 2.4 support by @pankajastro in #2161 * Drop Airflow 2.5 support by @pankajastro in #2165 Features * Support applying ``node_converter`` at a task level instead of task group level by @anyapriya in #1759 * Allow overriding ``DbtProducerWatcherOperator`` parameters via ``ExecutionConfig.setup_operator_args`` by @pankajastro in #2133 * Use deferrable sensors by default in ``ExecutionMode.WATCHER`` by @pankajastro in #2084 * Support real-time consumer updates when using ``ExecutionMode.WATCHER`` and ``InvocationMode.SUBPROCESS`` by @pankajastro in #2152 * Update telemetry to v3 format with query parameters by @pankajkoti in #2192 * Add initial set of telemetry task listener metrics for Cosmos operators by @pankajkoti in #2195 Enhancements * Unify Airflow version handling into ``constants.py`` by @tatiana in #2089 * Refactor ``airflow/graph.py`` to simplify the code base by @tatiana in #2080 * Force watcher producer retries to zero by @pankajkoti in #2114 * Fail ``ExecutionMode.WATCHER`` consumer sensors immediately when the producer fails using Airflow context by @pankajkoti in #2126 * ``ExecutonMode.WATCHER``: fetch producer status asynchronously from the Airflow runtime so deferrable sensors fail immediately when the producer task fails by @pankajkoti in #2144 * Refactor ``ExecutionMode.WATCHER`` ``InvocationMode.SUBPROCESS`` log parser by @tatiana in #2183 * Replace map_index with is_mapped_task boolean in task telemetry metrics by @pankajkoti in #2210 * Collect cosmos profile metrics in task telemetry metrics by @pankajastro in #2198 * Remove unnecessary information from telemetry by @tatiana in #2211 Bug fixes * Clarify ``ExecutionMode.WATCHER`` deferrable failure messaging by @pankajkoti in #2124 * Remove empty test tasks when all tests are detached by @anyapriya in #2010 * Fix forwarding ``DbtProducerWatcherOperator`` ``dbt build`` flags by @michal-mrazek in #2127 * Add databricks oauth mock profile by @fjmacagno in #2164 * Register listeners in Airflow 3 plugin implementation by @pankajastro in #2187 * Fix resolution of ``packages-install-path`` when it uses ``env_var`` by @tatiana in #2194 * Fix ``template_fields`` in ``DbtConsumerWatcherSensor`` to include ``DbtRunLocalOperator`` template_fields`` by @tiovader and @emanuel-luis in #2209 * Emit asset events in ExecutionMode.AIRFLOW_ASYNC mode by @pankajastro in #2184 * Remove dag_run_id from telemetry tests by @tatiana in #2213 Docs * Document dataset-event limitation when using ``ExecutionMode.AIRFLOW_ASYNC`` by @varaprasadregani in #2143 * Expand ``ExecutionMode.KUBERNETES`` guidance by @tatiana in #2139 * Add docs for deferrable ``DbtConsumerWatcherSensor`` by @pankajastro in #2115 * Fix reStructuredText formatting by @dnskr in #2132 * Add docs for ``setup_operator_args`` param by @pankajastro in #2136 * Remove experimental flag for ``ExecutionMode.AIRFLOW_ASYNC`` by @pankajastro in #2153 * Clarify ``ExecutionMode.AIRFLOW_ASYNC`` dataset limits by @pankajkoti in #2167 * Update PRIVACY_NOTICE.rst by @tatiana in #2212 Others * Drop Python 3.9 support by @pankajastro in #2118 * Drop Airflow 2.4 support by @pankajastro in #2161 * Drop Airflow 2.5 support by @pankajastro in #2165 * Improve example DAG ``jaffle_shop_kubernetes.py`` by @tatiana in #2140 * Enable tests for Python 3.13 by @pankajastro in #2154 * Add Python 3.12 to CI integration tests matrix by @pankajastro in #2168 * Retry flaky Telemetry success test to stabilise CI by @pankajkoti in #2138 * Drop unused producer state xcom handling in ``ExecutionMode.WATCHER`` by @pankajkoti in #2145 * Remove unused Python3.9 uses from Github action CI by @pankajastro in #2117 * Run pre-commit on ``ExecutionMode.WATCHER`` modules by @pankajkoti in #2150 * Refactor: Use shared airflow version constant by @pankajkoti in #2157 * Pin ``pydantic<2.0`` for Airflow 2.6 compatibility by @pankajastro in #2172 * Remove duplicate ``dbt-duckdb`` dependency by @pankajastro in #2170 * Add targeted ``type: ignore`` for untyped decorators to fix ``mypy`` errors by @pankajastro in #2174 * Replace Legacy typing Aliases with Built-in Types for Python 3.10+ by @pankajastro in #2175 * Refactor to reuse ``load_method_from_module`` from ``_utils/importer.py`` by @pankajastro in #2176 * Remove try except block for cache import and unused python_version variable by @pankajastro in #2186 * Unpin Airflow to satisfy GitHub Security tab requirements by @pankajastro in #2171 * Update Python version for ``pyupgrade`` in ``pre-commit`` config by @pankajastro in #2190 * Add cooldown config in ``dependabot`` config by @pankajastro in #2189 * Adjust pre-commit so Python 3.10 or higher can be used by @tatiana in #2196 * Remove empty variables emission from telemetry metrics by @pankajkoti in #2197 * Reformat documented comments for historical URL formats by @pankajkoti in #2199 * Bump ``actions/checkout`` from ``5.0.0`` to ``5.0.1`` by @dependabot in #2135 * Bump ``actions/checkout`` to ``6.0.0`` in GitHub workflows by @dependabot in #2147 * Bump ``zizmorcore/zizmor-action`` from ``0.2.0`` to ``0.3.0`` by @dependabot in #2156 * Bump ``actions/checkout`` from ``5.0.1`` to ``6.0.0`` by @dependabot in #2155 * Bump ``actions/checkout`` from ``6.0.0`` to ``6.0.1`` by @dependabot in #2178 * Bump ``codecov/codecov-action`` from ``5.5.1`` to ``5.5.2`` by @dependabot in #2208 * pre-commit autoupdate by @pre-commit-ci[bot] in #2134, #2162, #2173, #2191, #2202 closes: astronomer/oss-integrations-private#275
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This PR remove airflow 2.5 support based on
https://airflow.apache.org/docs/apache-airflow/stable/installation/supported-versions.html
CI: https://github.com/astronomer/astronomer-cosmos/actions/runs/19707628512/job/56459278326?pr=2165
closes: #2129