Secure WebSocket Support (#1619)

* Remove support for whitelist

* Rename nginx to nginx-api

* Remove websocket support from nginx-api

* Change nginx to nginx-api service
The nginx-api service will proxy requests to the BigchainDB HTTP API.

* Rename ngx-instance-0 to ngx-api-instance-0 in nginx_3scale

* Update nginx-api service base docker image and README

* Add nginx-ws service to support Websocket

* Add config files for simple dev setup

* WS support with split NGINX

* NGINX module as single entrypoint into the cluster.

* Tested HTTP and WS with latest configs

* Openresty as separate service

* Remove upstream api port as configuration parameter

* Changes while testing

* Adding READMEs for nginx-http and nginx-https modules

* Documentation update

* Change 'Openresty' to 'OpenResty'.

k8s/nginx-https/nginx-https-svc.yaml

@@ -0,0 +1,32 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: ngx-https-instance-0
+  namespace: default
+  labels:
+    name: ngx-https-instance-0
+  annotations:
+    # NOTE: the following annotation is a beta feature and
+    # only available in GCE/GKE and Azure as of now
+    service.beta.kubernetes.io/external-traffic: OnlyLocal
+spec:
+  selector:
+    app: ngx-https-instance-0-dep
+  ports:
+  - port: "<cluster-frontend-port from ConfigMap>"
+    targetPort: "<cluster-frontend-port from ConfigMap>"
+    name: public-secure-cluster-port
+    protocol: TCP
+  - port: "<mongodb-frontend-port from ConfigMap>"
+    targetPort: "<mongodb-frontend-port from ConfigMap>"
+    name: public-mdb-port
+    protocol: TCP
+  - port: "<threescale-api-port from ConfigMap>"
+    targetPort: "<threescale-api-port from ConfigMap>"
+    name: public-threescale-port
+    protocol: TCP
+  - port: 80
+    targetPort: 80
+    name: public-insecure-cluster-port
+    protocol: TCP
+  type: LoadBalancer