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We add a seperate front and backend on stepup tiqr servers that also serve as loadbalancer. It allows proxying http/1 requests to the http/2 only Apple API
API. An Haproxy instance is installed on StepupTIQR machines. It's only purpose is to proxy the requests from Tiqr to the Apple Push Notification service (APNs). Since the curl shipped with CentOS7 is http/1 only, and the APNs is http/2 only we use this proxy.
…y setting the boolean apns_http2_proxy to true
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The Apple Push Notification service (APNs) only supports http/2. Since curl shipped with CentOS7 only supports http/1 we are not able to send push messages to this Apple API.
We use haproxy to create a simple reverse http proxy between the Apple API and the TIQR application to proxy the requests (since Haproxy understands http/2).
On hosts where the whole stack is installed on 1 machine (and an Haproxy loadbalancer is already present) we add an extra back- and frontend for this purpose. TIQR can simple push the messages to http://localhost:5000