feat(refactoring): Support Structured Logging (JSON) (#30170)

docker/.env.example

@@ -69,6 +69,8 @@ PYTHONIOENCODING=utf-8
 # The log level for the application.
 # Supported values are `DEBUG`, `INFO`, `WARNING`, `ERROR`, `CRITICAL`
 LOG_LEVEL=INFO
+# Log output format: text or json
+LOG_OUTPUT_FORMAT=text
 # Log file path
 LOG_FILE=/app/logs/server.log
 # Log file max size, the unit is MB

docker/docker-compose.middleware.yaml

@@ -129,6 +129,7 @@ services:
       - ./middleware.env
     environment:
       # Use the shared environment variables.
+      LOG_OUTPUT_FORMAT: ${LOG_OUTPUT_FORMAT:-text}
       DB_DATABASE: ${DB_PLUGIN_DATABASE:-dify_plugin}
       REDIS_HOST: ${REDIS_HOST:-redis}
       REDIS_PORT: ${REDIS_PORT:-6379}

docker/docker-compose.yaml

@@ -17,6 +17,7 @@ x-shared-env: &shared-api-worker-env
   LC_ALL: ${LC_ALL:-en_US.UTF-8}
   PYTHONIOENCODING: ${PYTHONIOENCODING:-utf-8}
   LOG_LEVEL: ${LOG_LEVEL:-INFO}
+  LOG_OUTPUT_FORMAT: ${LOG_OUTPUT_FORMAT:-text}
   LOG_FILE: ${LOG_FILE:-/app/logs/server.log}
   LOG_FILE_MAX_SIZE: ${LOG_FILE_MAX_SIZE:-20}
   LOG_FILE_BACKUP_COUNT: ${LOG_FILE_BACKUP_COUNT:-5}