Merge pull request #167 from CS3219-AY2425S1/enhancement/api-gateway

Add API gateway

Author: jq1836

.env.sample

@@ -9,11 +9,11 @@ FRONTEND_PORT=3000
 BASE_URI=
 
 ## Question service variables
-QUESTION_SVC_PORT=
+QUESTION_SVC_PORT=8000
 QUESTION_SVC_DB_URI=
 
 ## User service variables
-USER_SVC_PORT=
+USER_SVC_PORT=3001
 USER_SVC_DB_URI=
 JWT_SECRET=
 EMAIL_ADDRESS=
@@ -31,4 +31,7 @@ OPENAI_API_KEY=
 REDIS_PORT=6379
 
 ## Redisinsight variables
-REDIS_INSIGHT_PORT=5540
+REDIS_INSIGHT_PORT=5540
+
+## API Gateway variables
+API_GATEWAY_PORT=

api-gateway/nginx.conf

@@ -0,0 +1,36 @@
+user  nginx;
+worker_processes  auto;
+
+error_log  /var/log/nginx/error.log notice;
+pid        /var/run/nginx.pid;
+
+
+events {
+    worker_connections  1024;
+}
+
+
+http {
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+
+    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+                      '$status $body_bytes_sent "$http_referer" '
+                      '"$http_user_agent" "$http_x_forwarded_for"';
+
+    access_log  /var/log/nginx/access.log  main;
+
+    sendfile        on;
+    #tcp_nopush     on;
+
+    keepalive_timeout  65;
+
+    #gzip  on;
+
+    map $http_upgrade $connection_upgrade {
+        default upgrade;
+        ''      close;
+    }
+
+    include /etc/nginx/conf.d/*.conf;
+}

api-gateway/templates/api_conf.d/admin_conf.d/matching_service.conf.template

@@ -0,0 +1,2 @@
+location /admin/matching-service/ {
+}

api-gateway/templates/api_conf.d/admin_conf.d/question_service.conf.template

@@ -0,0 +1,5 @@
+location /admin/question-service/ {
+    location /admin/question-service/questions {
+        proxy_pass http://question-service/questions;
+    }
+}

api-gateway/templates/api_conf.d/api_backends.conf.template

@@ -0,0 +1,19 @@
+upstream user-service {
+    server user-service:$USER_SVC_PORT;
+}
+
+upstream question-service {
+    server question-service:$QUESTION_SVC_PORT;
+}
+
+upstream matching-service {
+    server matching-service:$MATCHING_SVC_PORT;
+}
+
+upstream collab-service {
+    server collab-service:$COLLAB_SVC_PORT;
+}
+
+upstream frontend {
+    server frontend:$FRONTEND_PORT;
+}

api-gateway/templates/api_conf.d/auth.conf.template

@@ -0,0 +1,23 @@
+location /verify-token {
+    internal;
+
+    proxy_pass_request_body off; 
+    proxy_set_header Content-Length "";
+    proxy_pass http://user-service/auth/verify-token;
+}
+
+location /verify-owner {
+    internal;
+
+    proxy_pass_request_body off; 
+    proxy_set_header Content-Length "";
+    proxy_pass http://user-service/auth/verify-owner;
+}
+
+location /verify-admin {
+    internal;
+
+    proxy_pass_request_body off; 
+    proxy_set_header Content-Length "";
+    proxy_pass http://user-service/auth/verify-admin;
+}

api-gateway/templates/api_conf.d/frontend.conf.template

@@ -0,0 +1,3 @@
+location / {
+    proxy_pass http://frontend;
+}

api-gateway/templates/api_conf.d/owner_conf.d/matching_service.conf.template

@@ -0,0 +1,2 @@
+location /owner/matching-service/ {
+}

api-gateway/templates/api_conf.d/owner_conf.d/question_service.conf.template

@@ -0,0 +1,2 @@
+location /owner/question-service/ {
+}

api-gateway/templates/api_conf.d/private_conf.d/collab_service.conf.template

@@ -0,0 +1,10 @@
+location /private/collab-service/ {
+    proxy_pass http://collab-service/;
+    proxy_http_version 1.1;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection $connection_upgrade;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+}