我在dockerfile中启动了一个Python(2.7)应用程序:
CMD ["python","main.py"]
main.py在启动时打印一些字符串,然后进入循环:
print "App started"
while True:
time.sleep(1)
只要我使用-it标志启动容器,一切都会按预期运行:
$ docker run --name=myapp -it myappimage
> App started
稍后我可以通过日志(log)看到相同的输出:
$ docker logs myapp
> App started
如果我try 使用-d标志运行同一个容器,该容器似乎会正常启动,但我看不到任何输出:
$ docker run --name=myapp -d myappimage
> b82db1120fee5f92c80000f30f6bdc84e068bafa32738ab7adb47e641b19b4d1
$ docker logs myapp
$ (empty)
但集装箱似乎仍在运行;
$ docker ps
Container Status ...
myapp up 4 minutes ...
"附加"也不会显示任何内容:
$ docker attach --sig-proxy=false myapp
(working, no output)
你知道哪里出问题了吗?在后台运行时,"打印"的行为是否不同?
Docker版本:
Client version: 1.5.0
Client API version: 1.17
Go version (client): go1.4.2
Git commit (client): a8a31ef
OS/Arch (client): linux/arm
Server version: 1.5.0
Server API version: 1.17
Go version (server): go1.4.2
Git commit (server): a8a31ef