Supervisor: "environment" config option doesn't accept "%" character even when quoted

Broken: environment=SECRET_KEY="*wi4h$kqxp84f3w6uh8w@l$0(+@x$3cr&)z^lmg+pqw^6wky%i"

You should be able to include a % by using %%.

Supervisor uses Python string interpolation when parsing the config file, so you can test it like this:

$ python
>>> "*wi4h$kqxp84f3w6uh8w@l$0(+@x$3cr&)z^lmg+pqw^6wky%i" % {}
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: %d format: a number is required, not dict

With %%:

>>> "*wi4h$kqxp84f3w6uh8w@l$0(+@x$3cr&)z^lmg+pqw^6wky%%i" % {}
'*wi4h$kqxp84f3w6uh8w@l$0(+@x$3cr&)z^lmg+pqw^6wky%i'

Hi,

I faced a similar issue with config in environment= parameter inside [supervisord] block.

I have a parameter with % sign. I tried the suggested solution (using 2 % signs), but I haven't been able to resolve the issue.

The sample string to try with: x1it3km%2BTVmkRsQ
Getting following error for this string

Error: Format string 'SECRET="x1it3km%2BTVmkRsQ"' for 'supervisord.environment' is badly formatted: unsupported format character 'B'

I think this has something to do with a number following the % sign, but I'm not sure.
Any ideas?

@chinmaybhoir it is the case... it consider %2 like a special caracter or something like that.... In my cas i was on Django so i just remove every % in the key and it worked fine

It would be amazing if supervisor could automatically escape %s in strings (e.g., %(ENV_SECRET_KEY) currently expands to x1it3km%2BTVmkRsQ, which is invalid, but I'd like for it to expand to x1it3km%%2BTVmkRsQ. This way, I wouldn't have to change my Django secret key in order to make supervisor happy.