NGINX Load Balancer for WCF & gRPC

This guide extends our previous blog post on NGINX Load Balancing for WCF Applications by adding gRPC protocol support on port 10000. While the setup process remains similar, we’ll focus on the specific configuration changes needed in the bpserver-loadbalancer.conf file.

Configuration File Location: /etc/nginx/conf.d/bpserver-loadbalancer.conf

# NGINX Load Balancer Configuration for Blue Prism Enterprise
# Defining two upstream blocks for different ports

upstream bpserver_backend_8199 {
    ip_hash;
    server d11-app-bpe02.gcs.cloud:8199 max_fails=3 fail_timeout=30s;
    server d11-app-bpe03.gcs.cloud:8199 max_fails=3 fail_timeout=30s;
    server d11-app-bpe04.gcs.cloud:8199 max_fails=3 fail_timeout=30s;
}

upstream bpserver_backend_10000 {
    ip_hash;
    server d11-app-bpe02.gcs.cloud:10000 max_fails=3 fail_timeout=30s;
    server d11-app-bpe03.gcs.cloud:10000 max_fails=3 fail_timeout=30s;
    server d11-app-bpe04.gcs.cloud:10000 max_fails=3 fail_timeout=30s;
}

server {
    listen 8199 ssl;
    server_name d11-lnx-alb01.gcs.cloud;
    
    ssl_certificate     /etc/nginx/ssl/server_001.crt;
    ssl_certificate_key /etc/nginx/ssl/server.key;
    ssl_client_certificate /etc/nginx/ssl/ca-bundle.crt;
    ssl_verify_client off;

    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers on;
    
    location / {
        proxy_pass https://bpserver_backend_8199;
        proxy_ssl_verify off;

        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;
        
        proxy_connect_timeout 300s;
        proxy_read_timeout 300s;
        proxy_send_timeout 300s;

        proxy_pass_request_headers on;
        
        proxy_buffer_size 128k;
        proxy_buffers 4 256k;
        proxy_busy_buffers_size 256k;
    }
}

server {
    listen 10000; 
    http2 on;      # Add this line to enable HTTP/2
    server_name d11-lnx-alb01.gcs.cloud;
    
    location / {
        grpc_pass grpc://bpserver_backend_10000;  # Use grpc_pass instead of proxy_pass
        
        # gRPC specific settings
        grpc_read_timeout 300s;
        grpc_send_timeout 300s;
        
        # Headers for gRPC
        grpc_set_header Host $host;
        grpc_set_header X-Real-IP $remote_addr;
        grpc_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

See also:#

See also: