Submissão de teste - Thiago Gonçalves Gomes

participantes/thiagoGomes/README.md

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+# Submissão Teste Backend - Controle de Concorrência
+
+<img src="https://upload.wikimedia.org/wikipedia/commons/c/c5/Nginx_logo.svg" alt="logo nginx" width="300" height="auto">
+<br />
+<img src="https://upload.wikimedia.org/wikipedia/commons/5/5d/Clojure_logo.svg" alt="logo clojure" width="200" height="auto">
+<img src="https://upload.wikimedia.org/wikipedia/commons/2/29/Postgresql_elephant.svg" alt="logo postgres" width="200" height="auto">
+
+## Thiago Gonçalves Gomes
+
+Submissão feita com:
+
+- `nginx` como load balancer
+- `postgres` como banco de dados
+- `Java` para api com `Spring`
+- [repositório da api](https://github.com/Tenshyn/transactions)

participantes/thiagoGomes/docker-compose.yml

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+services:
+  api01: &api
+    image: tenshinran/test-backend:latest
+    hostname: api01
+    environment:
+      - SPRING_DATASOURCE_URL=jdbc:postgresql://db:5432/transaction
+      - SPRING_DATASOURCE_USERNAME=admin
+      - SPRING_DATASOURCE_PASSWORD=123
+      - SPRING_DATASOURCE_HIKARI_MAXIMUM-POOL-SIZE=10
+      - SPRING_DATASOURCE_HIKARI_MINIMUM-IDLE=5
+      - SERVER_PORT=3000
+    ports:
+      - "3001:3000"
+    depends_on:
+      - db
+    deploy:
+      resources:
+
+        limits:
+          cpus: "0.55"
+          memory: "200MB"
+
+  api02:
+    <<: *api
+    hostname: api02
+    ports:
+      - "3002:3000"
+
+  nginx:
+    image: nginx:latest
+    volumes:
+      - ./nginx.conf:/etc/nginx/nginx.conf:ro
+    depends_on:
+      - api01
+      - api02
+    ports:
+      - "9999:9999"
+    sysctls:
+      - net.ipv4.ip_local_port_range=10000 65535
+      - net.ipv4.tcp_tw_reuse=1
+      - net.ipv4.tcp_fin_timeout=30
+    deploy:
+      resources:
+        limits:
+          cpus: "0.15"
+          memory: "10MB"
+
+  db:
+    image: postgres:latest
+    hostname: db
+    environment:
+      - POSTGRES_PASSWORD=123
+      - POSTGRES_USER=admin
+      - POSTGRES_DB=transaction
+    ports:
+      - "5432:5432"
+    volumes:
+      - ./init.sql:/docker-entrypoint-initdb.d/init.sql
+    command: postgres -c checkpoint_timeout=600 -c max_wal_size=4096 -c synchronous_commit=0 -c full_page_writes=0
+    deploy:
+      resources:
+        limits:
+          cpus: "0.25"
+          memory: "140MB"
+
+networks:
+  default:
+    driver: bridge
+    name: net-nginx-test-backend

participantes/thiagoGomes/init.sql

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+CREATE TABLE IF NOT EXISTS client (
+    id INT PRIMARY KEY,
+    client_limit INT NOT NULL,
+    balance INT NOT NULL
+);
+
+INSERT INTO client (id, client_limit, balance) VALUES (1, 100000, 0);
+INSERT INTO client (id, client_limit, balance) VALUES (2, 80000, 0);
+INSERT INTO client (id, client_limit, balance) VALUES (3, 1000000, 0);
+INSERT INTO client (id, client_limit, balance) VALUES (4, 10000000, 0);
+INSERT INTO client (id, client_limit, balance) VALUES (5, 500000, 0);
+
+CREATE TABLE IF NOT EXISTS transaction (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    value INT NOT NULL,
+    type INT NOT NULL,
+    created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    description VARCHAR(10),
+    client_id INT NOT NULL,
+    CONSTRAINT fk_client FOREIGN KEY (client_id) REFERENCES client(id)
+);
+
+CREATE INDEX idx_transaction_client_id ON transaction(client_id);
+CREATE INDEX idx_transaction_created_at ON transaction(created_at DESC);

participantes/thiagoGomes/nginx.conf

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+events {
+    worker_connections 2000;
+}
+
+http {
+    access_log off;
+    sendfile   on;
+
+    keepalive_timeout 65;
+    keepalive_requests 1000;
+
+    upstream api {
+        server api01:3000;
+        server api02:3000;
+        keepalive 64;
+        keepalive_requests 1000;
+        keepalive_timeout 60s;
+    }
+
+    server {
+        listen 9999;
+
+        location / {
+            proxy_pass http://api;
+            proxy_http_version 1.1;
+            proxy_set_header Connection "";
+            proxy_set_header Host $host;
+
+            # Buffering
+            proxy_buffering on;
+            proxy_buffer_size 4k;
+            proxy_buffers 8 4k;
+        }
+    }
+}