Docker日志中的Python异常标记为流：stdout

Docker日志中的Python异常标记为流：stdout

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

但在以下情况下：

泊坞窗运行-it my_python python /var/app.py

json.log内容：

{"log":"Traceback (most recent call last):n","stream":"stdout","time":"2015-06-18T10:02:55.842010241Z"}{"log":"  File "/var/app.py", line 1, in u003cmoduleu003en","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: errorn","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：

docker运行-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 u003cmoduleu003en","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: errorn","stream":"stderr","time":"2015-06-18T10:02:18.90616668Z"}

我认为这种行为是隐性的。