apache/apisix

bug: cannot use file-logger to log to stdout

Open

#6,797 建立於 2022年4月6日

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 (15 留言) (0 反應) (1 負責人)Lua (16,597 star) (2,860 fork)batch import
For studentgood first issue

描述

Current Behavior

When using the file-logger plugin, it is possible to send the logging to stdout by defining /dev/stdout. This in order to use the docker output and relais this in kubernetes to a ELK stack. Though an error is thrown indicating a permission denied for the current user.

Expected Behavior

Be able to use /dev/stdout as a destination with the file-logger plugin.

Error Logs

failed to open file: /dev/stdout, error info: /dev/stdout: Permission denied while logging request

Steps to Reproduce

Run apisix docker with apisix.yaml:

routes:
  - uri: /*
    upstream_id: 1
    plugins:
      file-logger:
        path: /dev/stdout

upstreams:
  - id: 1
    nodes:
      "host.docker.internal:3000": 1
    type: roundrobin

plugins:
  - name: file-logger
#END

Environment

  • APISIX Docker version: apache/apisix:2.13.0-alpine
  • Host system: Macbook Pro Intel with docker desktop for mac

貢獻者指南

技術棧
docker
領域
observability
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-2 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
Basic understanding of Docker and file permissions
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
30
研究方向
The issue relates to using /dev/stdout as a file path for the file logger plugin, which fails with a permission denied error. Investigate the file logger plugin's file opening logic in plugins/file logger.lua to understand why /dev/stdout is restricted and consider adding a special case for stdout. Check if the Docker container's user configuration (e.g., in Dockerfile or entrypoint) affects permissions. The issue is assigned but no PR is linked, so review any comments for proposed solutions.