Domain of health check request

1

In my django app I need to specify a list of allowed hosts through a configuration variable. The render docs suggest using the RENDER_EXTERNAL_HOSTNAME env variable to drive this. I am seeing that once switching this variable from “*” to a specific host, the health checks on deploys begin to fail, and I’m assuming that’s due to the host making the health check not being on the allowlist.

This is what I currently have to configure my allowed_hosts - what additional domain should I add for the health checks to pass?

ALLOWED_HOSTS = ["0.0.0.0", "127.0.0.1"] + env("ALLOWED_HOSTS").split("|")
RENDER_EXTERNAL_HOSTNAME = env("RENDER_EXTERNAL_HOSTNAME", default=False)
if RENDER_EXTERNAL_HOSTNAME:
    ALLOWED_HOSTS.append(RENDER_EXTERNAL_HOSTNAME)
2

RENDER_EXTERNAL_HOSTNAME should be what is needed there. Here is what we use in our Django example:

# https://docs.djangoproject.com/en/3.0/ref/settings/#allowed-hosts
ALLOWED_HOSTS = []

RENDER_EXTERNAL_HOSTNAME = os.environ.get('RENDER_EXTERNAL_HOSTNAME')
if RENDER_EXTERNAL_HOSTNAME:
    ALLOWED_HOSTS.append(RENDER_EXTERNAL_HOSTNAME)