Why isn't gcloud available to /usr/bin/sh on Google Compute Engine instances?

Question

I'm trying to write a unit file for my CoreOS (version 1185.5.0) instance running on Google Compute Engine. However, it involves invoking gcloud via /usr/bin/sh, e.g. /usr/bin/sh -c 'gcloud --version'. The problem I face then is that /usr/bin/sh doesn't find gcloud: /usr/bin/sh: gcloud: command not found. I don't know why, as gcloud is available to me in my login shell.

Basically, how do I ensure that /usr/bin/sh can run gcloud?

Edit:

which doesn't find gcloud in my login shell either:

$ which gcloud
which: no gcloud in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/bin)

Answer 1

Figure out where gcloud is (via which gcloud), and give the full path in /bin/sh invocations.

For example:

$ which gcloud
/home/myusername/google-cloud-sdk/bin/gcloud
$ sh -c '/home/myusername/google-cloud-sdk/bin/gcloud version'

Answer 2

In CoreOS, gcloud is a command alias:

$ alias gcloud alias gcloud='(docker images google/cloud-sdk || docker pull google/cloud-sdk) > /dev/null;docker run -t -i --net=host -v /home/myusername/.config:/.config -v /var/run/docker.sock:/var/run/doker.sock google/cloud-sdk gcloud'

This alias will install/run gcloud. Running gcloud is essentially:

$ docker run google/cloud-sdk gcloud help

Or as run by the above alias:

$ docker run -t -i --net=host -v /home/myusername/.config:/.config -v /var/run/docker.sock:/var/run/doker.sock google/cloud-sdk gcloud