desktop notifications do not appear when used inside docker

[ronald]

I checked https://github.com/guard/guard/wiki/System-notifications but did not find any hints on using guard inside docker.

I use guard inside docker container with the command: bundle exec guard --no-bundler-warning --no-interactions
Is there any way to enable desktop notifications on the host system?

Thanks in advance

[kwerle]

This isn't so much a guard issue as a growl issue. There really aren't any standard notification mechanisms from inside a container to outside.

[ibrahima]

I realize this is a little old, but for reference, you should be able to send notifications notifications from inside your Docker container to your host via Growl/GNTP with a line like this:

ip_addr = `ip addr list eth0 |grep "inet " |cut -d' ' -f6|cut -d/ -f1`.strip
growl_host = "#{ip_addr.rpartition('.')[0]}.1"
notification :gntp, sticky: false, host: growl_host, password: "password"

There might be a better way to get the IP address of the Docker host from inside the container, but I think that snippet works. If on Docker for Mac or Windows, I think you can use host.docker.internal inside the container, but it's not part of the Linux Docker installation unfortunately.

Amusingly, I came here to this issue tracker to see if there was a better way to do this than use Growl, but it looks like this might still be the easiest way 😕.

[ronald]

With docker-compose on Linux you can set:

    extra_hosts:
      - "host.docker.internal:host-gateway"