Docker version 1.12.1 port 2375 with ShinyProxy-demo

ShinyProxy
#1

Using a fresh install version of Red Hat Enterprise Linux Server release 7.2 (Maipo) and Docker version 1.12.1, build 23cf638.

sudo docker pull openanalytics/shinyproxy-demo

The app launches and after putting in the uname and password, it gives a connection refused. error.

This break happened also on Ubuntu after updating. It’s definitely a Docker startup options issue.

With the updated Docker version, the command ExecStart=/usr/bin/docker daemon -H fd:// -D -H tcp://0.0.0.0:2375 causes it to not work. I tried adding a blank ExecStart= per the Docker Docker systemd docs but the new Docker uses ExecStart=/usr/bin/dockerd ....

Thanks,
John

#2

Hi @john_ryan_zelling ,

Thanks for letting us know about this! According to this page

dockerd seems to accept similar options.

Would using

ExecStart=/usr/bin/dockerd -H fd:// -D -H tcp://0.0.0.0:2375

reloading the config and restarting the daemon using

sudo systemctl daemon-reload
sudo systemctl restart docker

work?

Best,
Tobias

#3

UPDATE:

Okay I think I solved it for CentOS but Ubuntu still isn’t working: For Docker 1.12 on CentOS the line should be:

ExecStart=/usr/bin/dockerd -D -H tcp://0.0.0.0:2375

According to a bug report:

Docker 1.12 on CentOS no longer uses socket activation, so you need to remove the -H fd:// from the systemd unit file.

Probably a similar problem for the Ubuntu DOCKER_OPTS ? Ubuntu is not working yet after upgrade. I tried to modify the line

# Use DOCKER_OPTS to modify the daemon startup options.
DOCKER_OPTS="-H tcp://0.0.0.0:2375 -H unix://"

#5

Hi @john_ryan_zelling ,

Thanks a lot for the feedback.

# Use DOCKER_OPTS to modify the daemon startup options.                      
 DOCKER_OPTS="-H tcp://0.0.0.0:2375 -H unix://"

What version of Ubuntu are you using? 14.04 uses upstart, but 16.04 systemd.

#6

Ubuntu 16.04.1 LTS ‘xenial’

Still getting blocked error

#7

We tested successfully on 14.04 and 16.04 using Docker version 1.12.1

Client:
 Version:      1.12.1
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   23cf638
 Built:        Thu Aug 18 05:22:43 2016
 OS/Arch:      linux/amd64

Server:
 Version:      1.12.1
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   23cf638
 Built:        Thu Aug 18 05:22:43 2016
 OS/Arch:      linux/amd64

Maybe the new troubleshooting section is useful?

http://www.shinyproxy.io/troubleshooting/