[GitHub] [airflow] bellhea removed a comment on issue #10188: task_log_prefix_template configuration is not documented and doesn't work

[GitBox <gi...@apache.org>]

bellhea removed a comment on issue #10188:
URL: https://github.com/apache/airflow/issues/10188#issuecomment-669908236


   Right ok, thanks for that. 
   So instead I'm trying to use a custom logging config and implement something similar, would appreciate some guidance.. I have implemented the below custom "task_instance" formatter. I thought I should be able to see the actual dag and task ids in the log by using the relevant macros, but I'm just seeing the string "{{ti.dag_id}}-{{ti.task_id}}" itself. Any ideas?
   ```
   LOGGING_CONFIG = {
       'version': 1,
       'disable_existing_loggers': False,
       'formatters': {
           'airflow': {
               'format': LOG_FORMAT
           },
           'task_instance': {
               'format': "{{ti.dag_id}}-{{ti.task_id}} " + LOG_FORMAT
           },
           'airflow_coloured': {
               'format': COLORED_LOG_FORMAT if COLORED_LOG else LOG_FORMAT,
               FORMATTER_CLASS_KEY: COLORED_FORMATTER_CLASS if COLORED_LOG else 'logging.Formatter'
           },
       },
       'handlers': {
           'console': {
               'class': 'logging.StreamHandler',
               'formatter': 'airflow',
               'stream': 'ext://sys.stdout'
           },
           'task': {
               'class': 'airflow.utils.log.file_task_handler.FileTaskHandler',
               'formatter': 'task_instance',
               'base_log_folder': os.path.expanduser(BASE_LOG_FOLDER),
               'filename_template': FILENAME_TEMPLATE,
           },
   ...
   ```


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