Docker run does not display any output

Question

I installed docker on a raspberry-pi (Connected via ssh) Installation is successful.

But running docker run hello-world produce no output.

Note on very first time I got additional messages regard installing image

Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world ad0f38092cf2: Pull complete Digest: sha256:e366bc07db5e8a50dbabadd94c2a95d212bc103e3557e47df8a2eebd8bb46309 Status: Downloaded newer image for hello-world:latest

But there is no actual output from hello world script

Note I installed docker using command curl -sSL https://get.docker.com | sh

I tried following command too

sudo usermod -aG docker pi sudo systemctl start docker sudo docker run hello-world 

Tried following commands docker ps -a

CONTAINER ID        IMAGE               COMMAND             CREATED              STATUS                           PORTS               NAMES 734dd8f733d7        hello-world         "/hello"            About a minute ago   Exited (139) 59 seconds ago                          thirsty_bhaskara 

Answer 1

I ran into the same issue on a Raspberry Pi 1B+ (armv6l). Inspired by @JanDrábek's answer, the first observation is that the hello-world image would indeed be one supporting ARM, yet only after using hypriot/armhf-hello-world instead did I get the expected output:

$ uname -a Linux 4.1.19+ #858 Tue Mar 15 15:52:03 GMT 2016 armv6l GNU/Linux $ docker run hello-world  # No output $ docker image inspect hello-world | grep Architecture  # Arch looks right though         "Architecture": "arm", $ docker run hypriot/armhf-hello-world  # This does the job Hello from Docker. This message shows that your installation appears to be working correctly. 

Answer 2

run:

docker ps -a 

and check if you can see the exited container.

take the container ID from the output and type

docker logs <ID> 

this will allow you to see the logs.

if you want to see the output in the first place when you run it add -it flags to the run command

edit:

I tried in on my machine:

docker run -it hello-world Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world d1725b59e92d: Pull complete  Digest: sha256:e366bc07db5e8a50dbabadd94c2a95d212bc103e3557e47df8a2eebd8bb46309 Status: Downloaded newer image for hello-world:latest  Hello from Docker! This message shows that your installation appears to be working correctly. 

maybe your output is redirected to some other stream. try using :

docker run -it hello-world > ./test.txt 2>&1 

after that check if the file has any content