Target staging reverse proxy
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Authored by ardumont on Nov 4 2020, 3:39 PM.

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	@startuml
	title Staging Reverse Proxy

	participant User
	box "Firewall" #Orange
	participant fw
	note over fw: NAT between vlan \n1300 (public) addresses \nto vlan 443 (staging)
	end box
	box "1 global reverse proxy" #LightGreen
	participant FrontendHitch
	participant Varnish
	end box
	box "1 node per service (webapp, deposit)" #LightBlue
	participant Apache
	participant Gunicorn
	end box

	activate fw

	User -> FrontendHitch: https queries
	activate FrontendHitch

	FrontendHitch -> Varnish: forwards query
	note left: ssl termination

	activate Varnish

	alt #transparent cache hit
	Varnish -> FrontendHitch: returns result
	FrontendHitch --> User: returns result
	else cache missed
	Varnish -> Apache: forwards query
	activate Apache

	Apache -> Gunicorn: forwards query
	activate Gunicorn

	Gunicorn --> Apache: returns result
	deactivate Gunicorn

	Apache --> Varnish: caches and returns result
	deactivate Apache

	Varnish -> FrontendHitch: returns result
	FrontendHitch --> User: returns result

	deactivate Varnish
	deactivate FrontendHitch
	end

	@enduml

Target staging reverse proxyActivePublicActions