user 'docker' does not exist

[Dan Ames]

Following the steps for a new Tethys Platform installation, I am getting an error on this step:

after running the gpasswd command I get: 

gpasswd: user 'docker' does not exist.

Any ideas what's going on here?

Thanks,

Dan

[dan.ames.byu]

Fixed my own problem Seems we need to update the installation instructions to tell the user to add them selves to the docker group with a command like this:

sudo usermod -aG docker $(whoami)

- Dan

[sdc50]

Dan,

The line that you got an error on:

sudo gpasswd -a ${USER} docker

is supposed to add your user to the docker group. It would be interesting to figure out why that line didn't work for you. Based on the error that you reported is seems like the variable ${USER} was not defined, so it evaluated to the empty string and then the argument `docker` which was supposed to denote the group was read in positionally as the user argument instead of the group; thus the error "user 'docker' does not exist". Usually on Ubuntu (desktop or server) the ${USER} variable is defined by default. I'm assuming your running on an AWS VM, so maybe have some differences there. I remember running into some problems when I was trying to set up Tethys on AWS a couple of years ago. Unfortunately, I don't remember the details, or even if we ended up getting it to work. 

[Dan Ames]

OK thanks Scott. This is actually a server I'm setting up on DigitalOcean. It would be nice if our read the docs pages supported comments so we could add notes like this easily... 

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[swainn]

Dan, the command you shared is equivalent to the command in the docs (it adds the user to the group, rather than adding the group to the user). I agree with @sdc50's evaluation. My guess is you need to modify the command to be:

sudo gpasswd -a $(whoami) docker

To answer the question about why logging out is required, it is necessary to effect any changes to users and user groups. In this case,  adding your user to the docker group.

[swainn]

In terms of being able to add comments to the Tethys documentation there is this in the FAQ of Read the Docs:

http://read-the-docs.readthedocs.io/en/latest/faq.html#i-want-comments-in-my-docs

We may want to look into Discus or similar: https://disqus.com/