Deploy the stack: docker stack up -c stack.yaml http
This will listen on port 2100 & 2101
Access endpoints :2101/yes with an extra header
X-Forwarded-Proto: https:
# With httpie:
http :2101/yes x-forwarded-proto:https show_env==1
# With curl:
curl 127.0.0.1:2101/yes -H x-forwarded-proto:https
Expected result
:2101/yes should respond with yes https, which is configured
as direct_response
Actual result
:2101/yes responds with yes
Extra Debugging
Accessing endpoint :2101/bin/headers?show_env=1 returns all
headers sent from Envoy to httpbin. Which shows that
header X-Forwarded-Proto is overwritten.