docker nginx無法與web容器建立連接

Question

我的docker nginx容器無法連接到gunicorn容器。搬運工撰寫日誌的樣子，

dj  | [2017-09-16 12:37:14 +0000] [22] [INFO] Starting gunicorn 19.7.1 
dj  | [2017-09-16 12:37:14 +0000] [22] [DEBUG] Arbiter booted 
dj  | [2017-09-16 12:37:14 +0000] [22] [INFO] Listening at: http://127.0.0.1:8000 (22) 
dj  | [2017-09-16 12:37:14 +0000] [22] [INFO] Using worker: sync 
dj  | [2017-09-16 12:37:14 +0000] [25] [INFO] Booting worker with pid: 25 
dj  | [2017-09-16 12:37:14 +0000] [22] [DEBUG] 1 workers 
ng  | 2017/09/16 12:37:22 [error] 8#8: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 172.20.0.1, server: localhost, request: "GET /api HTTP/1.1", upstream: "http://127.0.0.1:8000/api/v1", host: "localhost" 
ng  | 172.20.0.1 - - [16/Sep/2017:12:37:22 +0000] "GET /api HTTP/1.1" 502 537 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/52.0.2743.116 Chrome/52.0.2743.116 Safari/537.36" "-" 
ng  | 2017/09/16 12:37:31 [error] 8#8: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 172.20.0.1, server: localhost, request: "GET /admin HTTP/1.1", upstream: "http://127.0.0.1:8000/api/admin", host: "localhost" 
ng  | 172.20.0.1 - - [16/Sep/2017:12:37:31 +0000] "GET /admin HTTP/1.1" 502 537 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/52.0.2743.116 Chrome/52.0.2743.116 Safari/537.36" "-" 

如果我讓裏面django容器的捲曲請求時，它顯示了相關的HTML文本。

$ docker-compose exec api bash 
root@e29e3756916c:/code# curl http://127.0.0.1:8000 
root@e29e3756916c:/code# curl http://127.0.0.1:8000/api/v1 
root@e29e3756916c:/code# curl -L http://127.0.0.1:8000/api/v1 
{"_type":"document","_meta":{"url":"http://127.0.0.1:8000/api/v1/","title":"Backend APIs"},"auth":{"convert-token":{"create":{"_type":"link","url":"/api/v1/auth/convert-token/","action":"post","description":"Implements an endpoint to convert a provider token to an access token\n\nThe endpoint is used in the following flows:\n\n* Authorization code\n* Client credentials"}},"revoke-token":{"create":{"_type":"link","url":"/api/v1/auth/revoke-token/","action":"post","description":"Implements an endpoint to revoke access or refresh tokens"}},"sign_in":{"create":{"_type":"link","url":"/api/v1/auth/sign_in/","action":"post","encoding":"application/json","fields":[{"name":"username","required":true,"location":"form","schema":{"_type":"string","title":"Username","description":""}},{"name":"password","required":true,"location":"form","schema":{"_type":"string","title":"Password","description":""}}]}},"sign_up":{"create":{"_type":"link","url":"/api/v1/auth/sign_up/","action":"post","encoding":"application/json","fields":[{"name":"first_name","location":"form","schema":{"_type":"string","title":"First name","description":""}},{"name":"last_name","location":"form","schema":{"_type":"string","title":"Last name","description":""}},{"name":"email","location":"form","schema":{"_type":"string","title":"Email address","description":""}},{"name":"username","required":true,"location":"form","schema":{"_type":"string","title":"Username","description":"Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only."}},{"name":"password","required":true,"location":"form","schema":{"_type":"string","title":"Password","description":""}},{"name":"is_active","location":"form","schema":{"_type":"boolean","title":"Active","description":"Designates whether this user should be treated as active. Unselect this instead of deleting accounts."}}]}},"token":{"create":{"_type":"link","url":"/api/v1/auth/token/","action":"post","description":"Implements an endpoint to provide access tokens\n\nThe endpoint is used in the following flows:\n\n* Authorization code\n* Password\n* Client credentials"}}}}root@e29e3756916c:/code# 
root@e29e3756916c:/code# 

nginx.conf

server { 
    listen  80; 
    server_name localhost; 

    #charset koi8-r; 
    #access_log /var/log/nginx/host.access.log main; 

    #error_page 404    /404.html; 

    # redirect server error pages to the static page /50x.html 
    # 
    error_page 500 502 503 504 /50x.html; 
    location = /50x.html { 
     root /usr/share/nginx/html; 
    } 

    proxy_force_ranges  on; 
    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 $http_x_forwarded_proto; 

    location /admin { 
    proxy_pass    http://127.0.0.1:8000/api/admin; 
    } 
    location /api { 
    proxy_pass    http://127.0.0.1:8000/api/v1; 
    } 
    location /oauth { 
    proxy_pass    http://127.0.0.1:8000/api/oauth; 
    } 
    location /static { 
    proxy_pass    http://127.0.0.1:8000/static; 
    } 
    location/{ 
    root /usr/share/nginx/html; 
    index index.html index.htm; 
    try_files $uri $uri/ /index.html; 
    } 
} 

Dockerfile爲nginx的容器是，

FROM nginx:latest 

#RUN apt-get update 

ADD ./static /usr/share/nginx/html 

ADD nginx.conf /etc/nginx/conf.d/default.conf 

ENV NGINX_PORT 80 

EXPOSE 80 

CMD /bin/bash -c "nginx -g 'daemon off;'" 

docker-compose.yaml

version: '2' 
services: 
    nginx: 
    build: ./nginx 
    container_name: ng 
    ports: 
     - "80:80" 
    #volumes: 
    # - ./src:/src 
    # - ./config/nginx:/etc/nginx/conf.d 
    depends_on: 
     - api 
    links: 
     - api 
    volumes_from: 
     - api 
    api: 
    build: ./s2s_api 
    container_name: dj 
    command: bash ./wait_for_db.sh 
    restart: always 
    depends_on: 
     - db 
    ports: 
     - "8000:8000" 
    tty: true 
    links: 
     - db:mysql 

    db: 
    image: mysql 
    container_name: db 
    command: mysqld --user=root --verbose 
    volumes: 
     - ./dbcreation.sql:/tmp/dbcreation.sql 
     - ./import.sh:/tmp/import.sh 
    ports: 
     - "3306:3306" 
    restart: always 
    environment: 
     MYSQL_DATABASE: "S2S" 
     MYSQL_USER: "root" 
     MYSQL_PASSWORD: "avi" 
     MYSQL_ROOT_PASSWORD: "avi" 
     MYSQL_ALLOW_EMPTY_PASSWORD: "yes" 
     DB_PORT: 3306 
     DB_HOST: db 

wait_for_db.sh

#!/bin/sh 
# Wait for database to get available 

M_LOOPS="10" 

#wait for mysql 
i=0 
# http://stackoverflow.com/a/19956266/4848859 
while ! curl db:3306 >/dev/null 2>&1 < /dev/null; do 
    i=`expr $i + 1` 

    if [ $i -ge $M_LOOPS ]; then 
    echo "$(date) - db:3306 still not reachable, giving up" 
    exit 1 
    fi 

    echo "$(date) - waiting for db:3306..." 
    sleep 3 
done 

echo "$(date) - db:3306 Reachable ! - Starting Daemon" 
#start the daemon 
#exec $START_CMD 
python manage.py makemigrations 
python manage.py migrate 
gunicorn s2s_api.wsgi:application -b 127.0.0.1:8000 --log-level debug 

Answer 1

你的問題在日誌中很明顯。

dj  | [2017-09-16 12:37:14 +0000] [22] [INFO] Listening at: http://127.0.0.1:8000 (22) 
ng  | 2017/09/16 12:37:22 [error] 8#8: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 172.20.0.1, server: localhost, request: "GET /api HTTP/1.1", upstream: "http://127.0.0.1:8000/api/v1", host: "localhost" 

所以有兩個問題，他們都在127.0.0.1。在你dj容器，你應該上運行0.0.0.0:8000gunicorn，因爲請求將由nginx的容器被轉發，這是外部的每個容器分

127.0.0.1 Django的容器，容器環回本身。現在，當你將nginx中的proxy_pass改爲127.0.0.1:8000時，nginx正期待着在端口8000的同一個容器中運行一些東西。所以它不起作用。您需要將其更改爲在docker-compose中使用的服務的名稱。假設這是api，你應該在側使用

proxy_pass    http://api:8000/api/oauth; 

而且notem你不應該來Gunicorn代理通靜態文件，應在nginx的容器處理本身