Nginx Docker AWS，Nginx 无法在多容器中解析 127.0.0.11

Question

我在做什么：

nginx-openresty 与 mecached 和 docker-compose.

从 nginx 我可以通过指定解析器 = 127.0.0.11 来连接 memcached 容器，在 docker 中编写它的工作文件。

但是当我在 AWS 多容器 beanstalk 上部署它时，我遇到了超时错误

failed to connect: memcache could not be resolved (110: Operation timed out)

但是从 nginx 容器我可以 ping memcahed。

NGINX.conf

location /health-check {
  resolver 127.0.0.11 ipv6=off;
  access_by_lua_block {

      local memcached = require "resty.memcached"
      local memc, err = memcached:new()
      if not memc then
          ngx.say("failed to instantiate memc: ", err)
          return
      end

      memc: set_timeout(1000) -- 1 sec

      local ok, err = memc:connect("memcache", 11211)
      if not ok then
          ngx.say("failed to connect: ", err)
          return
      end

DOCKER-COMPOSE.YML

    version: "3"

services:

  memcache:
    image: memcached:alpine
    container_name: memcached
    ports:
      - "11211:11211"
    expose:
      - "11211"
    networks:
      - default


  nginx:
    image: openresty/openresty:alpine
    container_name: nginx
    volumes:
      # Nginx files
      - ./nginx/:/etc/nginx/:ro
      # Web files
      - ./web/:/var/www/web/:ro
    entrypoint: openresty -c /etc/nginx/nginx.conf
    ports:
      - "8080:8080"
    networks:
      - default

DOCKERRUN.AWS.JSON

{
  "AWSEBDockerrunVersion": 2,

  "volumes": [
    {
      "name": "current-nginx",
      "host": {
        "sourcePath": "/var/app/current/nginx"
      }
    },
    {
      "name": "web",
      "host": {
        "sourcePath": "/var/www/web/"
      }
    }
  ],
  "containerDefinitions": [
    {
      "name": "memcache",
      "image": "memcached:alpine",
      "essential": true,
      "memory": 1000,
      "portMappings": [
        {
          "hostPort": 11211,
          "containerPort": 11211
        }
      ]
    },
    {
      "name": "nginx",
      "image": "openresty/openresty:alpine",
      "essential": true,
      "memory": 1000,
      "entryPoint": [
        "openresty",
        "-c",
        "/etc/nginx/nginx.conf"
      ],
      "links": [
        "memcache"
      ],

      "portMappings": [

        {
          "hostPort": 8080,
          "containerPort": 8080
        },
        {
          "hostPort": 80,
          "containerPort": 8080
        }
      ],
      "mountPoints": [
        {
          "sourceVolume": "web",
          "containerPath": "/var/www/web/",
          "readOnly": false
        },
        {
          "sourceVolume": "current-nginx",
          "containerPath": "/etc/nginx",
          "readOnly": false
        }
      ]
    }
  ]
}

Answer 1

你有一个错字： memc:connect("memcache", 11211)

应该是 memc:connect("memcached", 11211)

（您缺少一个“d”）。