[example config] add python-loguru-logger.md

example_config/user_contrib/python-loguru-logger.md

@@ -0,0 +1,96 @@
+# Python loguru.logger日志
+
+## 提供者
+[`cangkui`](https://github.com/cangkui)
+
+## 描述
+在许多python应用程序当中，开发者使用`loguru.logger`记录日志。比如，某Flask Web应用被Supervisor所部署，Supervisor配置文件如下：
+
+```
+[program:flask_gunicorn]
+directory=/workspace/indicator_assess_system/
+environment=FLASK_CONFIG='development',PYTHONUNBUFFERED=1
+command=python3 ./run_flask.py
+user=root
+autorestart=true
+startsecs=3
+startretires=3
+redirect_stderr=true
+stopsignal=HUP
+killasgroup=true
+stopasgroup=true
+stdout_logfile_maxbytes=100MB
+stdout_logfile_backups = 20
+stdout_logfile=/var/log/supervisor/flask_gunicorn.log
+```
+
+该配置文件将应用的标准输出重定向至`/var/log/supervisor/flask_gunicorn.log`当中，在应用当中使用`loguru.logger`产生的日志（如`loguru.logger.info`、`loguru.logger.error`等）也将输出至`flask_gunicorn.log`文件当中。
+
+## 日志输入样例
+```
+2023-07-05 14:39:22.086 | ERROR    | flask_app.api:decorator:16 - the JSON object must be str, bytes or bytearray, not NoneType
+2023-07-06 16:47:54.605 | INFO     | flask_app.service.influxdb_service:query_by_func:120 - QUERY SQL: 
+            SELECT SUM("score") AS "score" FROM test_data 
+            WHERE
+                time>=$st AND time<=$ed
+            GROUP BY
+                *
+            fill(previous)
+2023-07-06 15:57:24.599 | ERROR    | flask_app.api:decorator:16 - (pymysql.err.OperationalError) (1049, "Unknown database 'indicator_assess'")
+(Background on this error at: https://sqlalche.me/e/14/e3q8)
+2023-07-07 11:32:31.863 | WARNING  | flask_app.api.inter_variable:fill_data_process:575 - point: N3DCS.CNDPINC "yc('N3DCS.3CNDP1')" exec error! e: name 'yc' is not defined
+```
+
+## 日志输出样例
+```
+{
+	"time": "2023-07-05 14:39:22.086",
+	"level": "ERROR",
+	"msg": "flask_app.api:decorator:16 - the JSON object must be str, bytes or bytearray, not NoneType",
+	"__time__": "1688783301"
+}
+
+{
+	"time": "2023-07-06 16:47:54.605",
+	"level": "INFO",
+	"msg": "flask_app.service.influxdb_service:query_by_func:120 - QUERY SQL: \n            SELECT SUM(\"score\") AS \"score\" FROM test_data \n            WHERE\n                time>=$st AND time<=$ed\n            GROUP BY\n                *\n            fill(previous)",
+	"__time__": "1688783301"
+} 
+
+{
+	"time": "2023-07-06 15:57:24.599",
+	"level": "ERROR",
+	"msg": "flask_app.api:decorator:16 - (pymysql.err.OperationalError) (1049, \"Unknown database 'indicator_assess'\")\n(Background on this error at: https://sqlalche.me/e/14/e3q8)",
+	"__time__": "1688783301"
+} 
+
+{
+	"time": "2023-07-07 11:32:31.863",
+	"level": "WARNING",
+	"msg": "flask_app.api.inter_variable:fill_data_process:575 - point: N3DCS.CNDPINC \"yc('N3DCS.3CNDP1')\" exec error! e: name 'yc' is not defined",
+	"__time__": "1688783301"
+}
+```
+
+## 采集配置
+```yaml
+enable: true
+inputs:
+  - Type: file_log
+    LogPath: ./test-log
+    FilePattern: reg.log
+processors:
+  - Type: processor_split_log_regex
+    SplitKey: content
+    SplitRegex: '\d+-\d+-\d+.*'
+  - Type: processor_regex
+    SourceKey: content
+    Regex: '(\d+-\d+-\d+\s\d+:\d+:\d+\.\d+)\s+\|\s+(\S+)\s+\|\s+(.*)'
+    Keys: ["time", "level", "msg"]
+flushers:
+  - Type: flusher_stdout
+    OnlyStdout: true
+```
+
+
+备注：在iLogtail项目顶层目录下新建了`test-log`文件夹，并在其中创建了`reg.log`日志文件，该日志文件当中的内容即为输入样例的内容。