Add mailhog proxy for single lb support (#247)

Author: piyushroshan

deploy/docker/docker-compose.yml

@@ -155,6 +155,7 @@ services:
       - COMMUNITY_SERVICE=crapi-community:${COMMUNITY_SERVER_PORT:-8087}
       - IDENTITY_SERVICE=crapi-identity:${IDENTITY_SERVER_PORT:-8080}
       - WORKSHOP_SERVICE=crapi-workshop:${WORKSHOP_SERVER_PORT:-8000}
+      - MAILHOG_WEB_SERVICE=mailhog:8025
       - TLS_ENABLED=${TLS_ENABLED:-false}
     depends_on:
       crapi-community:

deploy/helm/templates/web/configmap.yaml

@@ -9,4 +9,5 @@ data:
   COMMUNITY_SERVICE: {{ .Values.community.service.name }}:{{ .Values.community.port }}
   IDENTITY_SERVICE: {{ .Values.identity.service.name }}:{{ .Values.identity.port }}
   WORKSHOP_SERVICE: {{ .Values.workshop.service.name }}:{{ .Values.workshop.port }}
+  MAILHOG_WEB_SERVICE: {{ .Values.mailhog.service.name }}:{{ .Values.mailhog.webPort }}
   TLS_ENABLED: {{ .Values.tlsEnabled | quote }}

services/web/nginx-wrapper.sh

@@ -23,6 +23,6 @@ else
 fi
 ls -al /app/certs
 env
-envsubst '${HTTP_PROTOCOL} ${COMMUNITY_SERVICE} ${IDENTITY_SERVICE} ${WORKSHOP_SERVICE}' < $NGINX_TEMPLATE > /etc/nginx/conf.d/default.conf
+envsubst '${HTTP_PROTOCOL} ${COMMUNITY_SERVICE} ${IDENTITY_SERVICE} ${WORKSHOP_SERVICE} ${MAILHOG_WEB_SERVICE}' < $NGINX_TEMPLATE > /etc/nginx/conf.d/default.conf
 openresty
 exec "$@"

services/web/nginx.conf.template

@@ -66,6 +66,23 @@ server {
     proxy_pass ${HTTP_PROTOCOL}://${IDENTITY_SERVICE}/identity/api/auth/jwks.json;
   }
 
+  location /mailhog/ {
+    rewrite_by_lua_block {
+      ngx.req.read_body()  -- explicitly read the req body
+      local body = ngx.req.get_body_data()
+      if body then
+        body = ngx.re.gsub(body, ngx.var.scheme.."://"..ngx.var.http_host, "http://${MAILHOG_WEB_SERVICE}")
+        ngx.req.set_body_data(body)
+      end
+    }
+    proxy_pass  http://${MAILHOG_WEB_SERVICE}/;
+    proxy_set_header Host ${MAILHOG_WEB_SERVICE};
+    proxy_set_header X-Forwarded-Host $http_host;
+    sub_filter_types application/json text/html;
+    sub_filter "http://${MAILHOG_WEB_SERVICE}" "$scheme://$http_host";
+    sub_filter_once off;
+  }
+
   location / {
     try_files $uri /index.html =404;
     add_header Last-Modified $date_gmt;
@@ -139,6 +156,23 @@ server {
     proxy_pass ${HTTP_PROTOCOL}://${IDENTITY_SERVICE}/identity/api/auth/jwks.json;
   }
 
+  location /mailhog/ {
+    rewrite_by_lua_block {
+      ngx.req.read_body()  -- explicitly read the req body
+      local body = ngx.req.get_body_data()
+      if body then
+        body = ngx.re.gsub(body, ngx.var.scheme.."://"..ngx.var.http_host, "http://${MAILHOG_WEB_SERVICE}")
+        ngx.req.set_body_data(body)
+      end
+    }
+    proxy_pass  http://${MAILHOG_WEB_SERVICE}/;
+    proxy_set_header Host ${MAILHOG_WEB_SERVICE};
+    proxy_set_header X-Forwarded-Host $http_host;
+    sub_filter_types application/json text/html;
+    sub_filter "http://${MAILHOG_WEB_SERVICE}" "$scheme://$http_host";
+    sub_filter_once off;
+  }
+
   location / {
     try_files $uri /index.html =404;
     add_header Last-Modified $date_gmt;

services/web/nginx.ssl.conf.template

@@ -73,6 +73,25 @@ server {
     proxy_ssl_trusted_certificate /app/certs/server.crt;
   }
 
+  location /mailhog/ {
+    rewrite_by_lua_block {
+      ngx.req.read_body()  -- explicitly read the req body
+      local body = ngx.req.get_body_data()
+      if body then
+        body = ngx.re.gsub(body, ngx.var.scheme.."://"..ngx.var.http_host, "http://${MAILHOG_WEB_SERVICE}")
+        ngx.req.set_body_data(body)
+      end
+    }
+    proxy_pass  http://${MAILHOG_WEB_SERVICE}/;
+    proxy_set_header Host ${MAILHOG_WEB_SERVICE};
+    proxy_set_header X-Forwarded-Host $http_host;
+    sub_filter_types application/json text/html;
+    sub_filter "http://${MAILHOG_WEB_SERVICE}" "$scheme://$http_host";
+    sub_filter_once off;
+    proxy_ssl_verify off;
+    proxy_ssl_trusted_certificate /app/certs/server.crt;
+  }
+
   location / {
     try_files $uri /index.html =404;
     add_header Last-Modified $date_gmt;
@@ -146,6 +165,23 @@ server {
     proxy_pass ${HTTP_PROTOCOL}://${IDENTITY_SERVICE}/identity/api/auth/jwks.json;
   }
 
+  location /mailhog/ {
+    rewrite_by_lua_block {
+      ngx.req.read_body()  -- explicitly read the req body
+      local body = ngx.req.get_body_data()
+      if body then
+        body = ngx.re.gsub(body, ngx.var.scheme.."://"..ngx.var.http_host, "http://${MAILHOG_WEB_SERVICE}")
+        ngx.req.set_body_data(body)
+      end
+    }
+    proxy_pass  http://${MAILHOG_WEB_SERVICE}/;
+    proxy_set_header Host ${MAILHOG_WEB_SERVICE};
+    proxy_set_header X-Forwarded-Host $http_host;
+    sub_filter_types application/json text/html;
+    sub_filter "http://${MAILHOG_WEB_SERVICE}" "$scheme://$http_host";
+    sub_filter_once off;
+  }
+
   location / {
     try_files $uri /index.html =404;
     add_header Last-Modified $date_gmt;