Airflow 2.0 db init 后的警告

Question

我使用 pip 命令在 ubuntu 上部署了 Airflow 2.0。 已从 1.10.13 迁移到 2.0。 但是在 db inint 之后，我收到了以下警告。 请建议我为什么会收到这些警告。 我尝试运行示例 dags，它们运行成功。

WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-http' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-sqlite' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-imap' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-ftp' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-http' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-sqlite' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-imap' could not be registered from because providers for that package name have already been registered
WARNI [airflow.providers_manager] The provider for package 'apache-airflow-providers-ftp' could not be registered from because providers for that package name have already been registered

Answer 1

我认为您有一种安装方式，您既安装了“提供程序包”，又安装了 Airflow 和PYTHONPATH中提供程序的源代码。 我猜你从带有-e标志的源而不是从 PyPI package 安装了 Airflow，在这种情况下你会收到这些警告。

顺便提一句。 这些警告将在 2.0.1 https://github.com/apache/airflow/commit/18df31d5d451299c510a9bf11946f17471f1e573中消失

警告是无害的 - 但是不使用作为包安装的提供程序（来自 airflow 源的提供程序是）。

The root cause of it that if you want to install Airflow as editable install from sources (basically when you want to contribute to Airflow) you should set INSTALL_PROVIDERS_FROM_SOURCES variable to true before installing Airflow (see https://github.com/apache/airflow /blob/master/CONTRIBUTING.rst#provider-packages ) - 这样您就不会从 PyPI 安装提供程序包。

Answer 2

我收到了同样的警告，而且我没有从源代码安装：

pip --use-deprecated legacy-resolver install "apache-airflow==${AIRFLOW_VERSION}" "apache-airflow[mysql]==${AIRFLOW_VERSION}" --constraint "${CONSTRAINT_URL}"