{"id":36661,"date":"2022-11-29T06:34:08","date_gmt":"2023-07-04T07:44:07","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/apache-airflow-%e5%b9%b6%e8%a1%8c%e5%a4%84%e7%90%86%e5%ae%9e%e8%b7%b5\/"},"modified":"2024-04-29T02:56:48","modified_gmt":"2024-04-28T18:56:48","slug":"apache-airflow-%e5%b9%b6%e8%a1%8c%e5%a4%84%e7%90%86%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/apache-airflow-%e5%b9%b6%e8%a1%8c%e5%a4%84%e7%90%86%e5%ae%9e%e8%b7%b5\/","title":{"rendered":"Apache Airflow \u5e76\u884c\u5904\u7406\u5b9e\u8df5"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u7ee7\u7eed\u8fdb\u884cApache Airflow\u7684\u5b9e\u8df5\uff0c\u5728The Complete Hands-On Introduction to Apache Airflow\u4e2d\u52a0\u6df1\u7406\u89e3\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u5728\u4f7f\u7528\u9ed8\u8ba4\u8bbe\u7f6e\u7684SQLite\u548cSequentialExecutor\u8fdb\u884c\u786e\u8ba4\u540e\uff0c\u5c06\u5176\u66f4\u6539\u4e3aPostgreSQL\u548cLocalExecutor\uff0c\u5e76\u5c1d\u8bd5\u5e76\u884c\u5904\u7406\u3002<\/p>\n

\u9ed8\u8ba4\u8bbe\u7f6e\u7684\u786e\u8ba4<\/h1>\n

\u5728Apache Airflow\u4e2d\uff0c\u5f53\u521d\u59cb\u5316\u65f6\u4f1a\u8fdb\u884c\u9ed8\u8ba4\u914d\u7f6e\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u547d\u4ee4\u6765\u67e5\u770b\u914d\u7f6e\u3002<\/p>\n

$ <\/span>airflow config get-value core sql_alchemy_conn\r\nsqlite:\/\/\/\/home\/airflow\/airflow\/airflow.db\r\n$ <\/span>airflow config get-value core executor\r\nSequentialExecutor\r\n<\/code><\/pre>\n
\u901a\u8fc7\u67e5\u770b\u8fd9\u4e2a\uff0c\u6211\u4eec\u53ef\u4ee5\u77e5\u9053 DB \u91c7\u7528\u4e86 SQLite\uff0c\u6267\u884c\u5668\u4e3a SequentialExecutor\u3002\u6211\u4eec\u53ef\u4ee5\u5148\u4fdd\u6301\u9ed8\u8ba4\u914d\u7f6e\u6765\u786e\u8ba4\u5b83\u7684\u884c\u4e3a\u5982\u4f55\u3002<\/p>\n
\u6211\u521b\u5efa\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u6709\u5411\u65e0\u73af\u56fe\u3002<\/p>\n
from<\/span> datetime<\/span> import<\/span> datetime<\/span>\r\n\r\nfrom<\/span> airflow<\/span> import<\/span> DAG<\/span>\r\nfrom<\/span> airflow.operators.bash<\/span> import<\/span> BashOperator<\/span>\r\n\r\ndefault_args<\/span> =<\/span> {<\/span>\"start_date\"<\/span>:<\/span> datetime<\/span>(<\/span>2020<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>)}<\/span>\r\n\r\nwith<\/span> DAG<\/span>(<\/span>\r\n    \"parallel_dag\"<\/span>,<\/span> schedule_interval<\/span>=<\/span>\"@daily\"<\/span>,<\/span> default_args<\/span>=<\/span>default_args<\/span>,<\/span> catchup<\/span>=<\/span>False<\/span>\r\n)<\/span> as<\/span> dag<\/span>:<\/span>\r\n\r\n    task_1<\/span> =<\/span> BashOperator<\/span>(<\/span>task_id<\/span>=<\/span>\"task_1\"<\/span>,<\/span> bash_command<\/span>=<\/span>\"sleep 3\"<\/span>)<\/span>\r\n\r\n    task_2<\/span> =<\/span> BashOperator<\/span>(<\/span>task_id<\/span>=<\/span>\"task_2\"<\/span>,<\/span> bash_command<\/span>=<\/span>\"sleep 3\"<\/span>)<\/span>\r\n\r\n    task_3<\/span> =<\/span> BashOperator<\/span>(<\/span>task_id<\/span>=<\/span>\"task_3\"<\/span>,<\/span> bash_command<\/span>=<\/span>\"sleep 3\"<\/span>)<\/span>\r\n\r\n    task_4<\/span> =<\/span> BashOperator<\/span>(<\/span>task_id<\/span>=<\/span>\"task_4\"<\/span>,<\/span> bash_command<\/span>=<\/span>\"sleep 3\"<\/span>)<\/span>\r\n\r\n    task_1<\/span> >><\/span> [<\/span>task_2<\/span>,<\/span> task_3<\/span>]<\/span> >><\/span> task_4<\/span>\r\n<\/code><\/pre>\n
\u8fd0\u884cairflow\u7684webserver\u548cscheduler\uff0c\u5e76\u8bbf\u95eehttp:\/\/localhost:8080\u3002\u5728DAGs\u4e2d\u9009\u62e9parallel_dag\uff0c\u5e76\u9009\u62e9Graph View\uff0c\u9875\u9762\u5c06\u663e\u793a\u5982\u4e0b\u5185\u5bb9\u3002<\/p>\n
\"parallel_dag.png\"<\/div>\n
\u770b\u8fd9\u4e2a\u56fe\u8868\uff0c\u4f3c\u4e4e\u5df2\u7ecf\u5b9e\u73b0\u4e86\u5e76\u884c\u5904\u7406\uff0c\u4f46\u662f\u5f53\u70b9\u51fb\u5de6\u4e0a\u89d2\u7684\u5207\u6362\u6309\u94ae\u8fdb\u884c\u6267\u884c\u540e\u8f6c\u5230\u7518\u7279\u56fe\u754c\u9762\u65f6\uff0c\u53ef\u4ee5\u786e\u8ba4\u5e76\u884c\u5904\u7406\u5e76\u672a\u8fdb\u884c\uff0c\u800c\u662f\u6309\u987a\u5e8f\u6267\u884c\u3002<\/p>\n
\"gantt.png\"<\/div>\n
\u8fd9\u662f\u7531\u4e8e\u9ed8\u8ba4\u7684 Executor \u662f Sequantial Executor \u6240\u5bfc\u81f4\u7684\u3002\u8fd9\u4e9b\u8bbe\u7f6e\u88ab\u8bb0\u5f55\u5728 ~\/airflow\/airflow.cfg \u4e2d\u3002<\/p>\n
\u8fdb\u884c\u5e76\u884c\u5904\u7406\u7684\u914d\u7f6e<\/h1>\n
\u4e3a\u4e86\u8fdb\u884c\u5e76\u884c\u5904\u7406\uff0c\u9700\u8981\u5bf9\u5e76\u884c\u5904\u7406\u8fdb\u884c\u652f\u6301\u7684\u6570\u636e\u5e93\u548c\u6267\u884c\u5668\u8fdb\u884c\u66f4\u6539\u3002\u5728\u8fd9\u91cc\uff0c\u9009\u62e9\u4f7f\u7528PostgreSQL\u4f5c\u4e3a\u6570\u636e\u5e93\uff0c\u5e76\u5c06\u6267\u884c\u5668\u4ece\u5e8f\u5217\u6267\u884c\u5668\u66f4\u6539\u4e3a\u672c\u5730\u6267\u884c\u5668\u3002<\/p>\n
$ <\/span>sudo <\/span>apt update\r\n$ <\/span>sudo <\/span>apt install <\/span>postgresql\r\n<\/code><\/pre>\n
\u4e3a\u4e86\u8fde\u63a5\uff0c\u8bbe\u7f6e\u7528\u6237postgres\u7684\u5bc6\u7801\u3002<\/p>\n
$ <\/span>sudo<\/span> -u<\/span> postgres psql\r\npostgres<\/span>=<\/span># ALTER USER postgres PASSWORD 'postgres';<\/span>\r\nALTER ROLE\r\n<\/code><\/pre>\n
\u5b89\u88c5\u7528\u4e8e\u64cd\u4f5cPostgres\u7684\u5305\u3002<\/p>\n
$ <\/span>pip install<\/span> 'apache-airflow[postgres]'<\/span>\r\n<\/code><\/pre>\n
\u6211\u5011\u5c07\u6839\u64da\u4ee5\u4e0b\u9032\u884c\u8a2d\u7f6e\u8b8a\u66f4\u3002\u9996\u5148\uff0c\u6211\u5011\u5c07\u8abf\u6574\u6578\u64da\u5eab\u914d\u7f6e\u5982\u4e0b\u3002\u8a73\u7d30\u7684\u8a2d\u7f6e\u683c\u5f0f\u8acb\u53c3\u8003 Database Urls\u3002<\/p>\n
...<\/span>\r\n\r\n# sql_alchemy_conn = sqlite:\/\/\/\/home\/airflow\/airflow\/airflow.dbost:port\/database\r\n<\/span>sql_alchemy_conn<\/span> =<\/span> postgresql+psycopg2:\/\/postgres:postgres@localhost\/postgres<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u5728\u53cd\u6620\u66f4\u6539\u540e\uff0c\u4ee5\u4e0b\u547d\u4ee4\u80fd\u591f\u987a\u5229\u6267\u884c\uff0c\u90a3\u4e48\u6570\u636e\u5e93\u5df2\u7ecf\u6210\u529f\u914d\u7f6e\u4e3aPostgreSQL\u3002<\/p>\n
$ <\/span>airflow db check\r\n<\/code><\/pre>\n
\u63a5\u7740\u8fd9\u4e00\u70b9\uff0c\u4e5f\u9700\u8981\u66f4\u6539 Executor.<\/p>\n
...<\/span>\r\n\r\n# executor = SequentialExecutor\r\n<\/span>executor<\/span> =<\/span> LocalExecutor<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u80fd\u591f\u66f4\u6539\u8bbe\u7f6e\uff0c\u90a3\u4e48\u521d\u59cb\u5316Postgres DB\u3002\u5982\u679cairflow webserver\u548cairflow scheduler\u5df2\u7ecf\u542f\u52a8\uff0c\u5219\u5148\u505c\u6b62\u5b83\u4eec\u3002<\/p>\n
$ <\/span>airflow db init\r\n...\r\n$ <\/span>airflow users <\/span>create -u<\/span> admin -p<\/span> admin -r<\/span> Admin -f<\/span> admin -l<\/span> admin -e<\/span> admin@airflow.com\r\n...\r\nAdmin user admin created\r\n<\/code><\/pre>\n
\u7531\u4e8e\u8fdb\u884c\u4e86DB\u7684\u521d\u59cb\u5316\u548c\u65b0\u7528\u6237\u7684\u521b\u5efa\uff0c\u56e0\u6b64\u6267\u884cairflow webserver\u548cairflow scheduler\uff0c\u5e76\u8bbf\u95eehttp:\/\/localhost:8080\u3002\u5982\u679c\u4ecd\u7136\u4ee5\u524d\u7684\u7528\u6237\u767b\u5f55\u72b6\u6001\uff0c\u8bf7\u5148\u9000\u51fa\u767b\u5f55\uff0c\u7136\u540e\u4f7f\u7528admin\/admin\u91cd\u65b0\u767b\u5f55\u3002\u4eceDAG\u4e2d\u9009\u62e9parallel_dag\uff0c\u5e76\u9009\u62e9Graph View\uff0c\u5c06\u663e\u793a\u5982\u4e0b\u5c4f\u5e55\u3002<\/p>\n
\"parallel_gantt.png\"<\/div>\n
\u53ef\u4ee5\u786e\u8ba4\u5b83\u6b63\u5728\u5e76\u884c\u5904\u7406\u3002<\/p>\n
\u6700\u540e<\/h1>\n
\u4f7f\u7528PostgreSQL\u548cLocalExecutor\u8fdb\u884c\u5e76\u884c\u5904\u7406\u7684\u5c1d\u8bd5\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u5e0c\u671b\u7ee7\u7eed\u52a0\u6df1\u7406\u89e3\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u9996\u5148 \u7ee7\u7eed\u8fdb\u884cApache Airflow\u7684\u5b9e\u8df5\uff0c\u5728The Complete Hands-On Introdu […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-36661","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nApache Airflow \u5e76\u884c\u5904\u7406\u5b9e\u8df5 - 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-\u5e76\u884c\u5904\u7406\u5b9e\u8df5\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Apache Airflow \u5e76\u884c\u5904\u7406\u5b9e\u8df5\" \/>\n<meta property=\"og:description\" content=\"\u9996\u5148 \u7ee7\u7eed\u8fdb\u884cApache Airflow\u7684\u5b9e\u8df5\uff0c\u5728The Complete Hands-On Introdu […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/apache-airflow-\u5e76\u884c\u5904\u7406\u5b9e\u8df5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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