如何从正在运行的Docker容器中读取文件和标准输出

Question

我该如何在主机中启动应用程序以便从正在运行的Docker容器中读取文件和标准输出？ 其实我想这样做：

docker start containerid   
./myapp // This app will *somehow* have access files and stdout generated by the container I just stared. 

我该怎么做呢?更具体地说，我想说的是;我想从docker容器中读取日志和标准输出，并在其他地方处理这些日志。 我也愿意创建另一个docker容器，它可以从另一个容器读取文件和标准输出，但我不知道这是否是可能的。

Answer 1

The stdout of the process started by the docker container is available through the docker logs command (use -f to keep it going forever). Another option would be to stream the logs directly through the docker remote API.

For accessing log files (only if you must, consider logging to stdout or other standard solution like syslogd) your only real-time option is to configure a volume (like Marcus Hughes suggests) so the logs are stored outside the container and available for processing from the host or another container.

If you do not need real-time access to the logs, you can export the files (in tar format) with docker export