Docker日志中的Python异常标记为流：stdout [英] Python exceptions in Docker logs marked as stream: stdout

问题描述

我想解析并处理docker容器中的所有错误，但是当我期望stderr时，将python异常标记为stdout。

I want parse and handle all errors from docker container, but python exceptions marked as stdout, when I expect stderr.

例如简单的 app.py

raise Exception("!")

然后我在docker容器中运行此文件。
但是在 / var / lib / docker / containers /.../...- json.log 中：

Then I run this file in docker container. But in /var/lib/docker/containers/.../...-json.log:

{"log":"Traceback (most recent call last):\n","stream":"stdout","time":"2015-06-17T23:10:01.58636849Z"}
{"log":"  File \"/var/app.py\", line 1, in \u003cmodule\u003e\n","stream":"stdout","time":"2015-06-17T23:10:01.586581081Z"}
{"log":"    raise Exception(\"!\")\n","stream":"stdout","time":"2015-06-17T23:10:01.586842665Z"}
{"log":"Exception: !\n","stream":"stdout","time":"2015-06-17T23:10:01.587373678Z"}

推荐答案

I有一个误解。我认为Docker CLI的命令不会影响主日志（/ var / lib / docker / containers /.../...- json.log）

I had a misconception. I thought that the command of docker CLI does not affect the main logs (/var/lib/docker/containers/.../...-json.log)

但如果出现以下情况：

docker run -it my_python python /var/app.py

json.log内容：

json.log content:

{"log":"Traceback (most recent call last):\n","stream":"stdout","time":"2015-06-18T10:02:55.842010241Z"}
{"log":"  File \"/var/app.py\", line 1, in \u003cmodule\u003e\n","stream":"stdout","time":"2015-06-18T10:02:55.842252975Z"}
{"log":"    raise Exception(\"error\")\n","stream":"stdout","time":"2015-06-18T10:02:55.842423153Z"}
{"log":"Exception: error\n","stream":"stdout","time":"2015-06-18T10:02:55.842754372Z"}

但是如果我在后台运行容器，流将成为stderr：

But if I run container in background, stream become stderr:

docker run -d my_python python /var/app.py

{"log":"Traceback (most recent call last):\n","stream":"stderr","time":"2015-06-18T10:02:18.905673576Z"}
{"log":"  File \"/var/app.py\", line 1, in \u003cmodule\u003e\n","stream":"stderr","time":"2015-06-18T10:02:18.90575399Z"}
{"log":"    raise Exception(\"error\")\n","stream":"stderr","time":"2015-06-18T10:02:18.905802834Z"}
{"log":"Exception: error\n","stream":"stderr","time":"2015-06-18T10:02:18.90616668Z"}

我认为这种行为是隐性的。

I think this behavior implicitly.

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