systemctl incorrectly complains about unbalanced quotes

[caleb collins-parks]

In our service file we have the following execstart:

ExecStart=/bin/sh -c '${CELERY_BIN} multi start ${CELERYD_NODES} \
  -A ${CELERY_APP} --pidfile=${CELERYD_PID_FILE} \
  --logfile=${CELERYD_LOG_FILE} --loglevel=${CELERYD_LOG_LEVEL} ${CELERYD_OPTS}'

This works just fine in ubuntu 16. However, in Ubuntu 18.04.2 LTS it throws this error:

Unbalanced quoting, ignoring: "/bin/sh -c '${CELERY_BIN} multi start ${CELERYD_NODES} \"

The workaround to the problem is getting rid of backslashes and doing everything on one line.
However, this looks ugly and I think there is a line length limit, which doesn't apply in our case, but could be problematic for people with very long lines.

[Ben Shum (bshum)]

I believe this bug was opened for our project Evergreen instead of Celery, which the code snippet seems to imply.

That said, perusing Celery's website, I see that they tell people to put issues into github though: https://github.com/celery/celery/issues/

Reassigning bug to the Celery project anyways.

[caleb collins-parks (caleb15)]

@bshum I assumed this was a ubuntu bug because it looked like a syntax error, but I can't replicate it :( Maybe it is a celery bug? I'm not sure anymore.