{"id":36295,"date":"2023-04-20T08:18:58","date_gmt":"2023-10-14T15:27:46","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/apache-airflow-%e5%ae%9e%e8%b7%b5%e6%95%99%e7%a8%8b\/"},"modified":"2024-04-30T00:21:05","modified_gmt":"2024-04-29T16:21:05","slug":"apache-airflow-%e5%ae%9e%e8%b7%b5%e6%95%99%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/apache-airflow-%e5%ae%9e%e8%b7%b5%e6%95%99%e7%a8%8b\/","title":{"rendered":"Apache Airflow \u5b9e\u8df5\u6559\u7a0b"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u4e3a\u4e86\u6784\u5efa\u673a\u5668\u5b66\u4e60\u6d41\u6c34\u7ebf\uff0c\u6211\u5b66\u4e60\u4e86Apache Airflow\u3002\u6211\u8bd5\u7740\u901a\u8fc7\u5b98\u65b9\u6559\u7a0b\u7b49\u8fdb\u884c\u5b9e\u9645\u64cd\u4f5c\uff0c\u4f46\u7406\u89e3\u8fdb\u5c55\u4e0d\u5927\uff0c\u6240\u4ee5\u6211\u8d2d\u4e70\u4e86\u300aThe Complete Hands-On Introduction to Apache Airflow\u300b\u3002\u867d\u7136\u662f\u82f1\u8bed\u7684\uff0c\u4f46\u5b83\u6709\u5b57\u5e55\uff0c\u662f\u975e\u5e38\u597d\u7684\u6559\u6750\uff0c\u6211\u63a8\u8350\u5b83\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5c06\u6839\u636e\u8fd9\u95e8\u8bfe\u7a0b\u4ecb\u7ecd\u6d41\u6c34\u7ebf\u6784\u5efa\u7684\u4e00\u7cfb\u5217\u6b65\u9aa4\u3002<\/p>\n

\u73af\u5883\u642d\u5efa<\/h1>\n

\u6211\u4f7f\u7528 venv \u6784\u5efa\u4e86\u865a\u62df\u73af\u5883\u3002Apache Airflow \u7684\u7248\u672c\u548c\u4f9d\u8d56\u5173\u7cfb\u90fd\u6839\u636e\u8fd9\u91cc\u7684\u8981\u6c42\u8fdb\u884c\u4e86\u8c03\u6574\uff08\u622a\u81f32022\u5e741\u6708\u4e3a\u6b62\uff0c\u7248\u672c\u4e3a2.1.0\uff09\u3002<\/p>\n

$ <\/span>python3 -m<\/span> venv sandbox\r\n$ <\/span>source <\/span>sandbox\/bin\/activate\r\n(<\/span>sandbox)<\/span> $ <\/span>sandbox\/bin\/python3 -m<\/span> pip install<\/span> --upgrade<\/span> pip\r\n(<\/span>sandbox)<\/span> $ <\/span>pip install <\/span>apache-airflow==<\/span>2.1.0 --constraint<\/span> https:\/\/gist.githubusercontent.com\/marclamberti\/742efaef5b2d94f44666b0aec020be7c\/raw\/21c88601337250b6fd93f1adceb55282fb07b7ed\/constraint.txt\r\n(<\/span>sandbox)<\/span> $ <\/span>airflow db init\r\n(<\/span>sandbox)<\/span> $ <\/span>airflow users <\/span>create --username<\/span> admin --password<\/span> admin --firstname<\/span> Taro\r\n--lastname<\/span> Yamada --role<\/span> Admin --email<\/span> admin@airflow.com\r\n<\/code><\/pre>\n
\u8fd0\u884c airflow webserver \u548c airflow scheduler\uff0c\u8bbf\u95ee http:\/\/localhost:8080\uff0c\u6253\u5f00\u4ee5\u4e0b\u753b\u9762\u3002<\/p>\n
\"airflow_home.png\"<\/div>\n
\u7a0d\u540e\uff0c\u7531\u4e8e\u754c\u9762\u4e0a\u8fd8\u6709\u4e00\u4e9b\u64cd\u4f5c\u9700\u8981\u8fdb\u884c\uff0c\u6240\u4ee5\u8bf7\u4fdd\u6301\u6253\u5f00\u72b6\u6001\u3002<\/p>\n
\u7ba1\u7ebf\u6982\u89c8<\/h1>\n
\u7531\u4e8e\u5df2\u521b\u5efa\u4e86\u540d\u4e3a~\/airflow\u7684\u76ee\u5f55\uff0c\u56e0\u6b64\u5728\u5176\u4e2d\u521b\u5efa\u4e00\u4e2a\u540d\u4e3adags\u7684\u76ee\u5f55\u3002DAG\u662fDirected Acyclic Graph\u7684\u7f29\u5199\uff0c\u7ffb\u8bd1\u6210\u4e2d\u6587\u4e3a\u6709\u5411\u975e\u5faa\u73af\u56fe\u3002\u8fd9\u662f\u5728\u56fe\u5f62\u7406\u8bba\u4e2d\u51fa\u73b0\u7684\u672f\u8bed\uff0c\u7b80\u800c\u8a00\u4e4b\uff0c\u8868\u793a\u53ea\u80fd\u5355\u5411\u524d\u8fdb\u4e14\u6ca1\u6709\u5faa\u73af\u7684\u7ed3\u6784\u3002\u901a\u8fc7dag\u76ee\u5f55\u6765\u6784\u5efa\u7ba1\u9053\u3002<\/p>\n
(<\/span>airflow-test)<\/span> $ <\/span>cd<\/span> ~\/airflow\r\n(<\/span>airflow-test)<\/span> $ <\/span>mkdir <\/span>dags\r\n<\/code><\/pre>\n
\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u6700\u7ec8\u5c06\u5efa\u7acb\u5982\u4e0b\u6240\u793a\u7684\u6d41\u6c34\u7ebf\u3002<\/p>\n
\"user_processing.png\"<\/div>\n
\u4ee5\u4e0b\u662f\u6bcf\u4e2a\u4efb\u52a1\u7684\u7b80\u8981\u8bf4\u660e\u3002<\/p>\n
    \n
  1. \n
      \u521b\u5efa\u8868\u683c\uff1a\u521b\u5efa\u4e00\u4e2a\u7528\u4e8e\u4fdd\u5b58\u6570\u636e\u7684\u8868\u683c\u3002<\/ol>\n<\/li>\n<\/ol>\n
      API\u662f\u5426\u53ef\u7528\uff1a\u7b49\u5f85Random User Generator\u7f51\u7ad9\u7684API\u53d8\u4e3a\u53ef\u7528\u72b6\u6001\u3002<\/p>\n
      \u63d0\u53d6\u7528\u6237\uff1a\u8c03\u7528API\u83b7\u53d6\u7528\u6237\u4fe1\u606f\u3002<\/p>\n
      \u5904\u7406\u7528\u6237\uff1a\u4ece\u83b7\u53d6\u7684\u7528\u6237\u4fe1\u606f\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u6570\u636e\u5e76\u4fdd\u5b58\u5230CSV\u6587\u4ef6\u4e2d\u3002<\/p>\n
      \u5b58\u50a8\u7528\u6237\uff1a\u5c06CSV\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u5b58\u50a8\u5230\u8868\u683c\u4e2d\u3002<\/p>\n
      \u5efa\u7acb\u6d41\u6c34\u7ebf<\/h1>\n
      \u5728 airflow\/dags\/user_processing.py \u6587\u4ef6\u4e2d\u521b\u5efa\u4efb\u52a1\u3002<\/p>\n
      0. \u521b\u5efaDAG\u5bf9\u8c61\u7684\u5b9e\u4f8b<\/h2>\n
      \u5728\u6309\u987a\u5e8f\u521b\u5efa\u4efb\u52a1\u4e4b\u524d\uff0c\u9996\u5148\u8981\u521b\u5efa\u5305\u542b\u4efb\u52a1\u7684DAG\u5b9e\u4f8b\u3002\u5728\u4ee5\u4e0b\u7684\u201cwith\u201d\u8bed\u6cd5\u4e2d\u5bf9\u6bcf\u4e2a\u4efb\u52a1\u8fdb\u884c\u5b9a\u4e49\u3002<\/p>\n
      from<\/span> datetime<\/span> import<\/span> datetime<\/span>\r\n\r\nfrom<\/span> airflow.models<\/span> import<\/span> DAG<\/span>\r\n\r\ndefault_args<\/span> =<\/span> {<\/span>\r\n    \"<\/span>start_date<\/span>\"<\/span>:<\/span> datetime<\/span>(<\/span>2020<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>),<\/span>\r\n}<\/span>\r\n\r\n\r\nwith<\/span> DAG<\/span>(<\/span>\r\n    \"<\/span>user_processing<\/span>\"<\/span>,<\/span>\r\n    schedule_interval<\/span>=<\/span>\"<\/span>@daily<\/span>\"<\/span>,<\/span>\r\n    default_args<\/span>=<\/span>default_args<\/span>,<\/span>\r\n    catchup<\/span>=<\/span>False<\/span>,<\/span>\r\n)<\/span> as<\/span> dag<\/span>:<\/span>\r\n\r\n    # define tasks\/operators\r\n<\/span><\/code><\/pre>\n
      \u521b\u5efa\u8868\u683c<\/h2>\n
      \u521b\u5efa\u4e00\u4e2a\u7528\u4e8e\u4fdd\u5b58\u6570\u636e\u7684\u8868\u683c\u3002\u7531\u4e8e\u4f7f\u7528\u4e86SQLite\uff0c\u56e0\u6b64\u9700\u8981\u4f7f\u7528SqliteOperator\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u5b89\u88c5\u3002<\/p>\n
      (<\/span>sandbox)<\/span> $ <\/span>pip install<\/span> 'apache-airflow-providers-sqlite'<\/span>\r\n<\/code><\/pre>\n
      Airflow\u6709\u8bb8\u591a\u63d0\u4f9b\u5546\uff0c\u6839\u636e\u9700\u8981\u9700\u8981\u5b89\u88c5\u3002\u6709\u5173\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u8003\u63d0\u4f9b\u5546\u8f6f\u4ef6\u5305\u53c2\u8003\u8d44\u6599\u3002<\/p>\n
      \u5728\u4e0b\u9762\uff0c\u5b9a\u4e49\u4e00\u4e2a\u4efb\u52a1\u3002\u5982\u679c\u8868\u4e0d\u5b58\u5728\uff0c\u5219\u521b\u5efa\u4e00\u4e2a\u5177\u67096\u4e2a\u5217\u7684\u8868\u683c\u3002<\/p>\n
      ...<\/span>\r\nfrom<\/span> airflow.providers.sqlite.operators.sqlite<\/span> import<\/span> SqliteOperator<\/span>\r\n\r\n...<\/span>\r\n\r\nwith<\/span> DAG<\/span>(...)<\/span> as<\/span> dag<\/span>:<\/span>\r\n\r\n    creating_table<\/span> =<\/span> SqliteOperator<\/span>(<\/span>\r\n        task_id<\/span>=<\/span>\"<\/span>creating_table<\/span>\"<\/span>,<\/span>\r\n        sqlite_conn_id<\/span>=<\/span>\"<\/span>db_sqlite<\/span>\"<\/span>,<\/span>\r\n        sql<\/span>=<\/span>\"\"\"<\/span>\r\n            CREATE TABLE IF NOT EXISTS users (\r\n                firstname TEXT NOT NULL,\r\n                lastname TEXT NOT NULL,\r\n                country TEXT NOT NULL,\r\n                username TEXT NOT NULL,\r\n                password TEXT NOT NULL,\r\n                email TEXT NOT NULL PRIMARY KEY\r\n            );\r\n            <\/span>\"\"\"<\/span>,<\/span>\r\n    )<\/span>\r\n<\/code><\/pre>\n
      \u9700\u8981\u4e0e\u6570\u636e\u5e93\u5efa\u7acb\u8fde\u63a5\u624d\u80fd\u8fde\u63a5\u5230\u8868\u683c\uff0c\u56e0\u6b64\u9700\u8981\u4ece\u4e4b\u524d\u6253\u5f00\u7684\u753b\u9762\u4e2d\u521b\u5efa\u3002\u9009\u62e9\u9876\u90e8\u7684 [Admin] -> [Connections]\uff0c\u7136\u540e\u70b9\u51fb [+] \u6309\u94ae\u8fdb\u884c\u65b0\u5efa\u3002\u914d\u7f6e\u8bf7\u53c2\u8003\u4ee5\u4e0b\u56fe\u7247\u3002<\/p>\n
      \"sqlite_conn.png\"<\/div>\n
      \u5c06Conn Id\u8bbe\u7f6e\u4e3asqlite_conn_id\u7684\u540c\u540d\u3002\u5c06Host\u6307\u5b9a\u4e3aairflow.db\u7684\u8def\u5f84\u3002<\/p>\n
      \u5982\u679c\u53ef\u4ee5\u505a\u5230\u8fd9\u4e00\u70b9\uff0c\u5c31\u8fdb\u884c\u4efb\u52a1\u6d4b\u8bd5\uff0c\u4ee5\u786e\u4fdd\u4efb\u52a1\u80fd\u591f\u8fd0\u884c\u6b63\u5e38\u3002\u4ee5\u4e0b\u662f\u6d4b\u8bd5\u547d\u4ee4\u3002\u5982\u679c\u6ca1\u6709\u51fa\u73b0\u9519\u8bef\uff0c\u5219\u8bf4\u660e\u5df2\u6b63\u786e\u521b\u5efa\u3002<\/p>\n
      (<\/span>sandbox)<\/span> $ <\/span>airflow tasks test <\/span>user_processing creating_table 2020-01-01\r\n<\/code><\/pre>\n
      2. API\u662f\u5426\u53ef\u7528<\/h1>\n
      \u4e3a\u4e86\u521b\u5efa\u4e00\u4e2a\u7b49\u5f85 API \u53ef\u7528\u7684\u5904\u7406\u8fc7\u7a0b\uff0c\u4f7f\u7528 Sensor\u3002\u4ee5\u4e0b\u662f Sensor \u7684\u5b98\u65b9\u6587\u6863\u4e2d\u7684\u63cf\u8ff0\u3002<\/p>\n
      \u4f20\u611f\u5668\u662f\u4e00\u79cd\u7279\u5b9a\u7c7b\u578b\u7684\u8fd0\u7b97\u7b26\uff0c\u4f1a\u4e00\u76f4\u8fd0\u884c\uff0c\u76f4\u5230\u6ee1\u8db3\u7279\u5b9a\u7684\u6761\u4ef6\u3002\u4f8b\u5982\uff0c\u4e00\u4e2a\u7279\u5b9a\u7684\u6587\u4ef6\u964d\u843d\u5728HDFS\u6216S3\u4e2d\uff0c\u4e00\u4e2a\u5206\u533a\u51fa\u73b0\u5728Hive\u4e2d\uff0c\u6216\u8005\u662f\u67d0\u4e2a\u7279\u5b9a\u7684\u65f6\u95f4\u3002\u4f20\u611f\u5668\u662f\u4eceBaseSensorOperator\u6d3e\u751f\u800c\u6765\u7684\uff0c\u4f1a\u5728\u6307\u5b9a\u7684poke_interval\u95f4\u9694\u5185\u8fd0\u884cpoke\u65b9\u6cd5\uff0c\u76f4\u5230\u5b83\u8fd4\u56deTrue\u4e3a\u6b62\u3002<\/p><\/blockquote>\n
      \u57fa\u672c\u4e0a\uff0c\u5b83\u662f\u7528\u4e8e\u7b49\u5f85\u67d0\u4e8b\u53d1\u751f\u5e76\u4fdd\u8bc1\u5176\u884c\u52a8\u7684\u5de5\u5177\uff0c\u5c31\u50cf\u8fd9\u6b21\u4e00\u6837\u3002\u7531\u4e8e\u4f7f\u7528HTTP\uff0c\u56e0\u6b64\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6765\u5b89\u88c5\u63d0\u4f9b\u7a0b\u5e8f\u3002<\/p>\n
      (<\/span>sandbox)<\/span> $ <\/span>pip install <\/span>apache-airflow-providers-http==<\/span>2.0.0\r\n<\/code><\/pre>\n
      \u4f7f\u7528 HttpSensor \u7684\u4ee3\u7801\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
      ...<\/span>\r\nfrom<\/span> airflow.providers.http.sensors.http<\/span> import<\/span> HttpSensor<\/span>\r\n\r\n...<\/span>\r\n\r\nwith<\/span> DAG<\/span>(...)<\/span> as<\/span> dag<\/span>:<\/span>\r\n\r\n    ...<\/span>\r\n\r\n    is_api_available<\/span> =<\/span> HttpSensor<\/span>(<\/span>\r\n        task_id<\/span>=<\/span>\"<\/span>is_api_available<\/span>\"<\/span>,<\/span> http_conn_id<\/span>=<\/span>\"<\/span>user_api<\/span>\"<\/span>,<\/span> endpoint<\/span>=<\/span>\"<\/span>api\/<\/span>\"<\/span>\r\n    )<\/span>\r\n<\/code><\/pre>\n
      \u5efa\u7acb\u4e0eAPI\u7684\u8fde\u63a5\u3002\u4e0eSQLite\u76f8\u540c\uff0c\u6309\u7167\u4ee5\u4e0b\u56fe\u7247\u6240\u793a\u8fdb\u884c\u8bbe\u7f6e\u3002<\/p>\n
      \"api_conn.png\"<\/div>\n
      \u5728\u8fd9\u91cc\u5bf9\u521a\u521a\u521b\u5efa\u7684\u4efb\u52a1\u8fdb\u884c\u6d4b\u8bd5\u3002<\/p>\n
      (<\/span>sandbox)<\/span> $ <\/span>airflow tasks test <\/span>user_processing is_api_available 2020-01-01\r\n<\/code><\/pre>\n
      3. \u63d0\u53d6\u7528\u6237<\/h1>\n
      \u5b9a\u4e49\u4e00\u4e2a\u4eceAPI\u83b7\u53d6\u6570\u636e\u7684\u4efb\u52a1\u3002<\/p>\n
      ...<\/span>\r\nimport<\/span> json<\/span>\r\nfrom<\/span> airflow.providers.http.operators.http<\/span> import<\/span> SimpleHttpOperator<\/span>\r\n\r\n...<\/span>\r\n\r\nwith<\/span> DAG<\/span>(...)<\/span> as<\/span> dag<\/span>:<\/span>\r\n\r\n    ...<\/span>\r\n\r\n    extracting_user<\/span> =<\/span> SimpleHttpOperator<\/span>(<\/span>\r\n        task_id<\/span>=<\/span>\"<\/span>extracting_user<\/span>\"<\/span>,<\/span>\r\n        http_conn_id<\/span>=<\/span>\"<\/span>user_api<\/span>\"<\/span>,<\/span>\r\n        endpoint<\/span>=<\/span>\"<\/span>api\/<\/span>\"<\/span>,<\/span>\r\n        method<\/span>=<\/span>\"<\/span>GET<\/span>\"<\/span>,<\/span>\r\n        response_filter<\/span>=<\/span>lambda<\/span> response<\/span>:<\/span> json<\/span>.<\/span>loads<\/span>(<\/span>response<\/span>.<\/span>text<\/span>),<\/span>\r\n        log_response<\/span>=<\/span>True<\/span>,<\/span>\r\n    )<\/span>\r\n<\/code><\/pre>\n
      \u53ea\u9700\u8981\u4e00\u4e2a\u9009\u9879\uff1a\u4e0e\u4e4b\u524d\u4e00\u6837\u8fdb\u884c\u6d4b\u8bd5\u5c06\u83b7\u5f97\u4ee5\u4e0b\u7ed3\u679c\u3002\u53ef\u4ee5\u786e\u8ba4\u83b7\u5f97\u4e0eRandom User Generator API\u76f8\u4f3c\u7684\u7ed3\u679c\u3002<\/p>\n
      (<\/span>sandbox)<\/span> $ <\/span>airflow tasks test <\/span>user_processing extracting_user 2020-01-01\r\n...\r\n[<\/span>2022-01-21 06:56:21,045] {<\/span>http.py:115}<\/span> INFO - {<\/span>\"results\"<\/span>:[{<\/span>\"gender\"<\/span>:\"male\"<\/span>,\"name\"<\/span>:{<\/span>\"title\"<\/span>:\"Mr\"<\/span>,\"first\"<\/span>:\"Darren\"<\/span>,\"last\"<\/span>:\"King\"<\/span>}<\/span>,\"location\"<\/span>:{<\/span>\"street\"<\/span>:{<\/span>\"number\"<\/span>:6614,\"name\"<\/span>:\"Bridge Road\"<\/span>}<\/span>,\"city\"<\/span>:\"Exeter\"<\/span>,\"state\"<\/span>:\"Clwyd\"<\/span>,\"country\"<\/span>:\"United Kingdom\"<\/span>,\"postcode\"<\/span>:\"K86 3ZN\"<\/span>,\"coordinates\"<\/span>:{<\/span>\"latitude\"<\/span>:\"6.5705\"<\/span>,\"longitude\"<\/span>:\"-158.8391\"<\/span>}<\/span>,\"timezone\"<\/span>:{<\/span>\"offset\"<\/span>:\"-3:30\"<\/span>,\"description\"<\/span>:\"Newfoundland\"<\/span>}}<\/span>,\"email\"<\/span>:\"darren.king@example.com\"<\/span>,\"login\"<\/span>:{<\/span>\"uuid\"<\/span>:\"384a152f-66a9-472d-a592-e1f8557e564f\"<\/span>,\"username\"<\/span>:\"purplecat905\"<\/span>,\"password\"<\/span>:\"flyers\"<\/span>,\"salt\"<\/span>:\"yyPLDi3z\"<\/span>,\"md5\"<\/span>:\"495955a7b7b4fc0664ac0fc580f2cca4\"<\/span>,\"sha1\"<\/span>:\"f85a89f3cfb86675bc42b5c0d787e247bbb0ad5e\"<\/span>,\"sha256\"<\/span>:\"b0824af8b0fcc5de0a996b3f6c41e7ea6a916a749b0aeeb6c648264f7f3c4447\"<\/span>}<\/span>,\"dob\"<\/span>:{<\/span>\"date\"<\/span>:\"1951-03-25T05:24:14.327Z\"<\/span>,\"age\"<\/span>:71}<\/span>,\"registered\"<\/span>:{<\/span>\"date\"<\/span>:\"2019-01-22T19:37:00.577Z\"<\/span>,\"age\"<\/span>:3}<\/span>,\"phone\"<\/span>:\"017683 00410\"<\/span>,\"cell\"<\/span>:\"0752-503-650\"<\/span>,\"id\"<\/span>:{<\/span>\"name\"<\/span>:\"NINO\"<\/span>,\"value\"<\/span>:\"PJ 90 72 17 S\"<\/span>}<\/span>,\"picture\"<\/span>:{<\/span>\"large\"<\/span>:\"https:\/\/randomuser.me\/api\/portraits\/men\/56.jpg\"<\/span>,\"medium\"<\/span>:\"https:\/\/randomuser.me\/api\/portraits\/med\/men\/56.jpg\"<\/span>,\"thumbnail\"<\/span>:\"https:\/\/randomuser.me\/api\/portraits\/thumb\/men\/56.jpg\"<\/span>}<\/span>,\"nat\"<\/span>:\"GB\"<\/span>}]<\/span>,\"info\"<\/span>:{<\/span>\"seed\"<\/span>:\"53304cf938cd3a25\"<\/span>,\"results\"<\/span>:1,\"page\"<\/span>:1,\"version\"<\/span>:\"1.3\"<\/span>}}<\/span>\r\n...\r\n<\/code><\/pre>\n
      4. \u5904\u7406\u7528\u6237<\/h1>\n
      \u7531\u4e8e\u83b7\u5f97\u4e86\u4e0a\u8ff0\u6570\u636e\uff0c\u6211\u4eec\u5e0c\u671b\u80fd\u591f\u9002\u5f53\u5730\u5904\u7406\u5e76\u63d0\u53d6\u4ec5\u9700\u8981\u6ce8\u518c\u5230\u8868\u4e2d\u7684\u6570\u636e\u3002\u4f7f\u7528PythonOperator\u5728Python\u811a\u672c\u4e2d\u6267\u884c\u5904\u7406\uff0c\u56e0\u6b64\u9700\u8981\u901a\u8fc7python_callable\u5b9a\u4e49\u6267\u884c\u51fd\u6570\u3002<\/p>\n
      \u5728\u672c\u6b21\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u901a\u8fc7 extracting_user \u83b7\u53d6\u7684\u6570\u636e\uff0c\u6240\u4ee5\u8981\u4f7f\u7528 Xcoms\u3002Xcoms \u662f Cross Communications \u7684\u7f29\u5199\uff0c\u5b83\u662f\u4e00\u79cd\u5141\u8bb8\u4efb\u52a1\u4e4b\u95f4\u8fdb\u884c\u76f8\u4e92\u901a\u4fe1\u7684\u673a\u5236\u3002\u8be6\u7ec6\u4fe1\u606f\u8bf7\u53c2\u8003\u5b98\u65b9\u6587\u6863\u3002\u7531\u4e8e\u4efb\u52a1\u7684\u8fd4\u56de\u503c\u9ed8\u8ba4\u662f\u88ab\u63a8\u9001\u7684\uff0c\u56e0\u6b64\u53ef\u4ee5\u901a\u8fc7 xcom_pull() \u63a5\u6536\u6570\u636e\u3002\uff08*\u8bf7\u6ce8\u610f\uff0c\u7981\u6b62\u4f20\u9012\u50cf\u6570\u636e\u6846\u8fd9\u6837\u5927\u7684\u6570\u636e\u3002\uff09<\/p>\n
      ...<\/span>\r\nfrom<\/span> airflow.operators.python<\/span> import<\/span> PythonOperator<\/span>\r\nfrom<\/span> pandas<\/span> import<\/span> json_normalize<\/span>\r\n\r\n...<\/span>\r\n\r\n\r\ndef<\/span> _processing_user<\/span>(<\/span>ti<\/span>):<\/span>\r\n    users<\/span> =<\/span> ti<\/span>.<\/span>xcom_pull<\/span>(<\/span>task_ids<\/span>=<\/span>[<\/span>\"<\/span>extracting_user<\/span>\"<\/span>])<\/span>\r\n    if<\/span> not<\/span> len<\/span>(<\/span>users<\/span>)<\/span> or<\/span> \"<\/span>results<\/span>\"<\/span> not<\/span> in<\/span> users<\/span>[<\/span>0<\/span>]:<\/span>\r\n        raise<\/span> ValueError<\/span>(<\/span>\"<\/span>User is Empy<\/span>\"<\/span>)<\/span>\r\n    user<\/span> =<\/span> users<\/span>[<\/span>0<\/span>][<\/span>\"<\/span>results<\/span>\"<\/span>][<\/span>0<\/span>]<\/span>\r\n    processed_user<\/span> =<\/span> json_normalize<\/span>(<\/span>\r\n        {<\/span>\r\n            \"<\/span>firstname<\/span>\"<\/span>:<\/span> user<\/span>[<\/span>\"<\/span>name<\/span>\"<\/span>][<\/span>\"<\/span>first<\/span>\"<\/span>],<\/span>\r\n            \"<\/span>lastname<\/span>\"<\/span>:<\/span> user<\/span>[<\/span>\"<\/span>name<\/span>\"<\/span>][<\/span>\"<\/span>last<\/span>\"<\/span>],<\/span>\r\n            \"<\/span>country<\/span>\"<\/span>:<\/span> user<\/span>[<\/span>\"<\/span>location<\/span>\"<\/span>][<\/span>\"<\/span>country<\/span>\"<\/span>],<\/span>\r\n            \"<\/span>username<\/span>\"<\/span>:<\/span> user<\/span>[<\/span>\"<\/span>login<\/span>\"<\/span>][<\/span>\"<\/span>username<\/span>\"<\/span>],<\/span>\r\n            \"<\/span>password<\/span>\"<\/span>:<\/span> user<\/span>[<\/span>\"<\/span>login<\/span>\"<\/span>][<\/span>\"<\/span>password<\/span>\"<\/span>],<\/span>\r\n            \"<\/span>email<\/span>\"<\/span>:<\/span> user<\/span>[<\/span>\"<\/span>email<\/span>\"<\/span>],<\/span>\r\n        }<\/span>\r\n    )<\/span>\r\n    processed_user<\/span>.<\/span>to_csv<\/span>(<\/span>\"<\/span>\/tmp\/processed_user.csv<\/span>\"<\/span>,<\/span> index<\/span>=<\/span>None<\/span>,<\/span> header<\/span>=<\/span>False<\/span>)<\/span>\r\n\r\nwith<\/span> DAG<\/span>(...)<\/span> as<\/span> dag<\/span>:<\/span>\r\n\r\n    ...<\/span>\r\n\r\n    processing_user<\/span> =<\/span> PythonOperator<\/span>(<\/span>\r\n        task_id<\/span>=<\/span>\"<\/span>processing_user<\/span>\"<\/span>,<\/span> python_callable<\/span>=<\/span>_processing_user<\/span>\r\n    )<\/span>\r\n<\/code><\/pre>\n
      \u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u6d4b\u8bd5\uff0c\u786e\u8ba4\u4ece cat tmp\/processed_user.csv \u63d0\u53d6\u7684\u6570\u636e\u5df2\u5b58\u50a8\u5230\u6587\u4ef6\u4e2d\u3002<\/p>\n
      (<\/span>sandbox)<\/span> $ <\/span>airflow tasks test <\/span>user_processing processing_user 2020-01-01\r\n...\r\n(<\/span>sandbox)<\/span> $ <\/span>cat<\/span> \/tmp\/processed_user.csv\r\nDarren,King,United Kingdom,purplecat905,flyers,darren.king@example.com\r\n<\/code><\/pre>\n
      5. \u5b58\u50a8\u7528\u6237<\/h1>\n
      \u6700\u540e\u7528 BashOperator \u5c06 CSV \u6570\u636e\u4fdd\u5b58\u5230\u6570\u636e\u5e93\u4e2d\u3002\u7701\u7565\u4e86\u8be6\u7ec6\u8bf4\u660e\u3002<\/p>\n
      ...<\/span>\r\nfrom<\/span> airflow.operators.bash<\/span> import<\/span> BashOperator<\/span>\r\n\r\n...<\/span>\r\n\r\n\r\nwith<\/span> DAG<\/span>(...)<\/span> as<\/span> dag<\/span>:<\/span>\r\n\r\n    ...<\/span>\r\n\r\n    storing_user<\/span> =<\/span> BashOperator<\/span>(<\/span>\r\n        ask_id<\/span>=<\/span>\"<\/span>storing_user<\/span>\"<\/span>,<\/span>\r\n        bash_command<\/span>=<\/span>'<\/span>echo -e <\/span>\"<\/span>.separator <\/span>\"<\/span>,<\/span>\"<\/span>\\n<\/span>.import  \/tmp\/processed_user.csv users<\/span>\"<\/span> | sqlite3 \/home\/airflow\/airflow\/airflow.db<\/span>'<\/span>,<\/span>\r\n    )<\/span>\r\n<\/code><\/pre>\n
      \u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6765\u786e\u8ba4\u6570\u636e\u662f\u5426\u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\u3002<\/p>\n
      (<\/span>sandbox)<\/span> $ <\/span>airflow tasks test <\/span>user_processing storing_user 2020-01-01\r\n...\r\n(<\/span>sandbox)<\/span> $ <\/span>splite3 airflow.db\r\nsqlite> select<\/span> *<\/span> from users<\/span>;<\/span>\r\nAna|Blanchard|France|sadbutterfly288|bounty|ana.blanchard@example.com\r\n<\/code><\/pre>\n
      6. \u4f9d\u8d56\u5173\u7cfb<\/h2>\n
      \u5b8c\u6210\u4ee5\u4e0a\u6b65\u9aa4\u540e\uff0c\u8fd4\u56de\u6d4f\u89c8\u5668\uff0c\u4ece[DAG]\u5217\u8868\u4e2d\u9009\u62e9’user_processing’\uff0c\u7136\u540e\u70b9\u51fb[Graph View]\u3002\u8fd9\u6837\uff0c\u4f1a\u5448\u73b0\u5982\u4e0b\u56fe\u6240\u793a\u7684\u72b6\u6001\u3002<\/p>\n
      \"only_tasks.png\"<\/div>\n
      \u5728\u8fd9\u4e2a\u9636\u6bb5\uff0c\u4efb\u52a1\u53ea\u662f\u96f6\u6563\u5730\u521b\u5efa\uff0c\u5e76\u4e14\u9700\u8981\u5b9a\u4e49\u5b83\u4eec\u7684\u6267\u884c\u987a\u5e8f\u3002\u5982\u679c\u9700\u8981\u7684\u8bdd\uff0c\u53ef\u4ee5\u8fd9\u6837\u63cf\u8ff0\uff1a<\/p>\n
      ...<\/span>\r\n\r\n\r\nwith<\/span> DAG<\/span>(...)<\/span> as<\/span> dag<\/span>:<\/span>\r\n\r\n    ...<\/span>\r\n\r\n    (<\/span>\r\n        creating_table<\/span>\r\n        >><\/span> is_api_available<\/span>\r\n        >><\/span> extracting_user<\/span>\r\n        >><\/span> processing_user<\/span>\r\n        >><\/span> storing_user<\/span>\r\n    )<\/span>\r\n<\/code><\/pre>\n
      \u8fd9\u4e2a\u987a\u5e8f\u88ab\u79f0\u4e3a\u4f9d\u8d56\u5173\u7cfb\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528>>\u6765\u5b9a\u4e49\u3002\u5237\u65b0\u9875\u9762\u540e\uff0c\u53ef\u4ee5\u786e\u8ba4\u5df2\u521b\u5efa\u4e86\u50cf\u9644\u4ef6\u4e00\u6837\u7684\u6d41\u6c34\u7ebf\u3002\u6309\u4e0b\u5de6\u4e0a\u89d2\u7684\u5207\u6362\u6309\u94ae\uff0c\u53ef\u4ee5\u6267\u884c\u6574\u4e2a\u6d41\u6c34\u7ebf\u3002<\/p>\n
      \"user_processing.png\"<\/div>\n
      \u6700\u540e<\/h1>\n
      \u4f7f\u7528Apache Airflow\u8fdb\u884c\u7b80\u5355\u7684\u7ba1\u9053\u6784\u5efa\u3002\u6211\u4eec\u60f3\u8981\u8003\u8651\u4f7f\u7528\u5404\u79cd\u63d0\u4f9b\u5546\u4ee5\u53ca\u5904\u7406\u7528\u4e8e\u673a\u5668\u5b66\u4e60\u7684\u5927\u6570\u636e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u9996\u5148 \u4e3a\u4e86\u6784\u5efa\u673a\u5668\u5b66\u4e60\u6d41\u6c34\u7ebf\uff0c\u6211\u5b66\u4e60\u4e86Apache Airflow\u3002\u6211\u8bd5\u7740\u901a\u8fc7\u5b98\u65b9\u6559\u7a0b\u7b49\u8fdb\u884c\u5b9e\u9645\u64cd\u4f5c\uff0c\u4f46\u7406\u89e3\u8fdb […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-36295","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nApache Airflow \u5b9e\u8df5\u6559\u7a0b - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/apache-airflow-\u5b9e\u8df5\u6559\u7a0b\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Apache Airflow \u5b9e\u8df5\u6559\u7a0b\" \/>\n<meta property=\"og:description\" content=\"\u9996\u5148 \u4e3a\u4e86\u6784\u5efa\u673a\u5668\u5b66\u4e60\u6d41\u6c34\u7ebf\uff0c\u6211\u5b66\u4e60\u4e86Apache Airflow\u3002\u6211\u8bd5\u7740\u901a\u8fc7\u5b98\u65b9\u6559\u7a0b\u7b49\u8fdb\u884c\u5b9e\u9645\u64cd\u4f5c\uff0c\u4f46\u7406\u89e3\u8fdb […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/apache-airflow-\u5b9e\u8df5\u6559\u7a0b\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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