From 23bac3aef1af18f2743b6fc83f6162685950512d Mon Sep 17 00:00:00 2001
From: Are Almaas <arealmaas@gmail.com>
Date: Wed, 3 Apr 2024 13:45:00 +0200
Subject: [PATCH] chore: add load balancer for web api in docker-compose (#582)

In order to replicate the setup in Container Apps, we add a load
balancer so we can have more than one replica of the web api.
---
 docker-compose.yml | 12 ++++++++++--
 nginx.conf         | 21 +++++++++++++++++++++
 2 files changed, 31 insertions(+), 2 deletions(-)
 create mode 100644 nginx.conf

diff --git a/docker-compose.yml b/docker-compose.yml
index fa9456f50..2e304d8d4 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -2,7 +2,17 @@ include:
   - docker-compose-no-webapi.yml
 
 services:
+  dialogporten-webapi-ingress:
+    image: nginx:1.25.4
+    ports:
+      - "7214:80"
+    volumes:
+      - ./nginx.conf:/etc/nginx/nginx.conf
+    depends_on:
+      - dialogporten-webapi
+    restart: always
   dialogporten-webapi:
+    scale: 2
     build:
       context: .
       dockerfile: src/Digdir.Domain.Dialogporten.WebApi/Dockerfile
@@ -19,7 +29,5 @@ services:
       - Serilog__MinimumLevel__Default=Debug
       - ASPNETCORE_URLS=http://+:8080
       - ASPNETCORE_ENVIRONMENT=Development
-    ports:
-      - "7214:8080"
     volumes:
       - ./.aspnet/https:/https
diff --git a/nginx.conf b/nginx.conf
new file mode 100644
index 000000000..75aaf89bc
--- /dev/null
+++ b/nginx.conf
@@ -0,0 +1,21 @@
+# this nginx config is for the load balancer: dialogporten-webapi-ingress in docker-compose.yml
+events {}
+
+http {
+    upstream webapi {
+        least_conn;
+        server dialogporten-webapi:8080;
+    }
+
+    server {
+        listen 80;
+
+        location / {
+            proxy_pass http://webapi;
+            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;
+        }
+    }
+}
\ No newline at end of file