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Enable HTTP/2 on ingress resource
Voyager can enable HTTP/2 from version >=7.0.0
To enable http2, you must first setup a certificate (Let’s Encrypt), or use an existing one. Then create an ingress object like below:
apiVersion: voyager.appscode.com/v1beta1
kind: Ingress
metadata:
name: haproxy-ingress # name of the ingress
namespace: default # namespace (optional)
annotations:
ingress.appscode.com/replicas: '2'
# ... other annotations
spec:
tls:
- hosts:
- host.example.com
ref:
kind: Certificate
name: host
rules:
- host: host.example.com
http:
paths:
- path: "/"
backend:
serviceName: host-service
servicePort: '8000'
alpn:
- h2
- http/1.1
- http/1.0
The important bit here is alpn. In this example the ingress can negotiate from HTTP/2 all the way down to HTTP/1.0. If alpn isn’t specified at all, the negotiated protocol will be HTTP/1.1 (default).
The above settings are reflected in the generated haproxy ConfigMap:
bind *:443 ssl no-sslv3 no-tlsv10 no-tls-tickets crt /etc/ssl/private/haproxy/tls/ alpn h2,http/1.1,http/1.0