当连接到上游时，没有活动的上游

Question

我正在尝试使用nginx建立反向代理。事情是，我想重定向到umami登录页面时，转到本地主机。但我得到502坏网关，我不确定我是否正确地配置了nginx。这是我的对接者-Compose.yml，看起来像：

version: '2'
services:
  nginx-proxy:
    image: nginx:latest
    container_name: nginx-proxy
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - ./my_proxy.conf:/etc/nginx/conf.d/default.conf:ro
  umami:
    image: ghcr.io/mikecao/umami:postgresql-latest
    ports:
      - "3000:3000"
    environment:
      DATABASE_URL: postgresql://umami:umami@db:5432/umami
      DATABASE_TYPE: postgresql
      HASH_SALT: 1234567890
    depends_on:
      - db
    restart: always
    networks:
      - nginx-net
  db:
    image: postgres:12-alpine
    environment:
      POSTGRES_DB: umami
      POSTGRES_USER: umami
      POSTGRES_PASSWORD: umami
    volumes:
      - ./sql/schema.postgresql.sql:/docker-entrypoint-initdb.d/schema.postgresql.sql:ro
      - umami-db-data:/var/lib/postgresql/data
    restart: always
    networks:
      - nginx-net
volumes:
  umami-db-data:
  conf:
  vhost:
  html:
  dhparam:
  certs:

networks:
  nginx-net:
    external:
      name: nginx-net

这是我在default.conf上安装的default.conf

server {
    listen       80;
    listen       [::]:80;
    server_name  localhost;

    location / {
      proxy_pass http://localhost:3000/login;
      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;
  }
}

这里是我使用过的sql文件夹链接。https://drive.google.com/file/d/1lvyLUve0SGpT1tXlsVoFwPmbmb75n8ER/view?usp=sharing

下面是日志文件的截图。

日志文件

2022/12/13 17:58:09 [notice] 1#1: using the "epoll" event method
2022/12/13 17:58:09 [notice] 1#1: nginx/1.23.2
2022/12/13 17:58:09 [notice] 1#1: built by gcc 10.2.1 20210110 (Debian 10.2.1-6) 
2022/12/13 17:58:09 [notice] 1#1: OS: Linux 5.15.0-56-generic
2022/12/13 17:58:09 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1024:524288
2022/12/13 17:58:09 [notice] 1#1: start worker processes
2022/12/13 17:58:09 [notice] 1#1: start worker process 21
2022/12/13 17:58:09 [notice] 1#1: start worker process 22
2022/12/13 17:58:09 [notice] 1#1: start worker process 23
2022/12/13 17:58:09 [notice] 1#1: start worker process 24
2022/12/13 17:58:09 [notice] 1#1: start worker process 25
2022/12/13 17:58:09 [notice] 1#1: start worker process 26
2022/12/13 17:58:09 [notice] 1#1: start worker process 27
2022/12/13 17:58:09 [notice] 1#1: start worker process 28
2022/12/13 17:58:10 [error] 21#21: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 172.20.0.1, server: localhost, request: "GET /nginx_status HTTP/1.1", upstream: "http://127.0.0.1:3000/loginnginx_status", host: "172.18.0.1"
2022/12/13 17:58:10 [warn] 21#21: *1 upstream server temporarily disabled while connecting to upstream, client: 172.20.0.1, server: localhost, request: "GET /nginx_status HTTP/1.1", upstream: "http://127.0.0.1:3000/loginnginx_status", host: "172.18.0.1"
2022/12/13 17:58:10 [error] 21#21: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 172.20.0.1, server: localhost, request: "GET /nginx_status HTTP/1.1", upstream: "http://127.0.0.1:3000/loginnginx_status", host: "172.18.0.1"
2022/12/13 17:58:10 [warn] 21#21: *1 upstream server temporarily disabled while connecting to upstream, client: 172.20.0.1, server: localhost, request: "GET /nginx_status HTTP/1.1", upstream: "http://127.0.0.1:3000/loginnginx_status", host: "172.18.0.1"
172.20.0.1 - - [13/Dec/2022:17:58:10 +0000] "GET /nginx_status HTTP/1.1" 502 157 "-" "Go-http-client/1.1" "-"
172.20.0.1 - - [13/Dec/2022:17:58:20 +0000] "GET /nginx_status HTTP/1.1" 502 157 "-" "Go-http-client/1.1" "-"
2022/12/13 17:58:20 [error] 22#22: *4 connect() failed (111: Connection refused) while connecting to upstream, client: 172.20.0.1, server: localhost, request: "GET /nginx_status HTTP/1.1", upstream: "http://127.0.0.1:3000/loginnginx_status", host: "172.18.0.1"
2022/12/13 17:58:20 [warn] 22#22: *4 upstream server temporarily disabled while connecting to upstream, client: 172.20.0.1, server: localhost, request: "GET /nginx_status HTTP/1.1", upstream: "http://127.0.0.1:3000/loginnginx_status", host: "172.18.0.1"
2022/12/13 17:58:20 [error] 22#22: *4 connect() failed (111: Connection refused) while connecting to upstream, client: 172.20.0.1, server: localhost, request: "GET /nginx_status HTTP/1.1", upstream: "http://127.0.0.1:3000/loginnginx_status", host: "172.18.0.1"
2022/12/13 17:58:20 [warn] 22#22: *4 upstream server temporarily disabled while connecting to upstream, client: 172.20.0.1, server: localhost, request: "GET /nginx_status HTTP/1.1", upstream: "http://127.0.0.1:3000/loginnginx_status", host: "172.18.0.1"

建议我怎么纠正这个问题？

Answer 1

每个容器都有自己的网络。通过提供localhost作为后端地址，nginx试图在自己的容器中访问这个端口。您需要提供另一个容器：

proxy_pass http://umami:3000/login;

容器的名称在其他容器中可以作为“主机名”使用，因此不应该有更多的工作要做。

您可以删除端口3000的端口定义，它只需要从容器外部访问端口。