英文:
How to dump goroutine of a container's entry point process?
问题
我有一个由docker-compose up运行的应用程序。当我通过docker-compose stop停止应用程序时，其中一个容器不会终止。该容器运行一个用Go编写的进程，因此我想转储该进程的goroutine以查看进程卡在哪里。
我可以使用docker ps查看容器，并使用docker exec -it <container-id> bash进入容器，但是一旦我执行kill -QUIT <process id>，进程终止后，容器也停止了，因此我无法获取goroutine转储。
在这种情况下如何获取goroutine转储？
英文:
I have an application run by docker-compose up. When a stop the app by docker-compose stop, one of container doesn't terminate. The container run a process written in Go, so I want to dump goroutine of the process to see where the process is stuck.
I can docker ps to see the container, and docker exec -it <container-id> bash to enter the container, but once I kill -QUIT <process id>, as the process terminate, container stopped as well, so I cannot get goroutine dump.
How to get goroutine dump in this case?
答案1
得分: 2
我认为你可以从容器的日志中获取goroutine的转储信息，前提是：
docker-compose stop停止运行的容器而不删除它们；kill -QUIT <进程ID>将goroutine转储到标准错误输出。
以下是获取容器日志的docker命令（-n 指定从日志末尾显示的行数）：
$ docker logs -n 1000 [容器名称]
英文:
> container stopped as well, so I cannot get goroutine dump.
I think you can get the goroutine dump from the logs of the container, providing that:
docker-compose stopstops running containers without removing them;kill -QUIT <process id>dumps the goroutine to the stderr.
Here is the docker command to get the container logs (-n specifies the number of lines to show from the end of the logs):
$ docker logs -n 1000 [container-name]
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