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jbodah/gist:14a38cbff2474feb40d223f308074723

Created August 29, 2019 19:27
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strace a container
Raw
gistfile1.txt
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2cdef4202c1c cg-ruby-sem_sem "rails c" 19 minutes ago Up 19 minutes 3000/tcp cg-ruby-sem_sem_run_73d6529b9b23
$ cat Dockerfile.debug
FROM alpine
RUN apk update && apk add strace
CMD ["strace", "-p", "1"]
$ docker build -f Dockerfile.debug -t strace .
$ docker run -it --pid=container:2cdef4202c1c --net=container:2cdef4202c1c --cap-add sys_admin --cap-add sys_ptrace strace
strace: Process 1 attached
read(7,
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