无法在 docker 中连接到 MongoDB

Question

使用mongo来自 docker hub的官方镜像，我运行以下命令使其运行：

docker run --name api -p 127.0.0.1:27017:27017 -p 127.0.0.1:28017:28017 -d mongo

然后从另一个终端外壳，我运行 mongo

但是，我不断收到以下错误：

MongoDB shell version: 3.2.3
connecting to: test
2016-02-18T13:52:08.110-0700 I NETWORK  [thread1] Socket recv() errno:104 Connection reset by peer 127.0.0.1:27017
2016-02-18T13:52:08.110-0700 I NETWORK  [thread1] SocketException: remote: (NONE):0 error: 9001 socket exception [RECV_ERROR] server [127.0.0.1:27017] 
2016-02-18T13:52:08.110-0700 E QUERY    [thread1] Error: network error while attempting to run command 'isMaster' on host '127.0.0.1:27017'  :
connect@src/mongo/shell/mongo.js:224:14
@(connect):1:6

exception: connect failed

我检查了容器的日志，一切似乎都正确：

2016-02-18T20:51:20.538+0000 I CONTROL  [initandlisten] MongoDB starting : pid=1 port=27017 dbpath=/data/db 64-bit host=73334e5089e1
2016-02-18T20:51:20.538+0000 I CONTROL  [initandlisten] db version v3.2.3
2016-02-18T20:51:20.538+0000 I CONTROL  [initandlisten] git version: b326ba837cf6f49d65c2f85e1b70f6f31ece7937
2016-02-18T20:51:20.538+0000 I CONTROL  [initandlisten] OpenSSL version: OpenSSL 1.0.1e 11 Feb 2013
2016-02-18T20:51:20.538+0000 I CONTROL  [initandlisten] allocator: tcmalloc
2016-02-18T20:51:20.538+0000 I CONTROL  [initandlisten] modules: none
2016-02-18T20:51:20.538+0000 I CONTROL  [initandlisten] build environment:
2016-02-18T20:51:20.538+0000 I CONTROL  [initandlisten]     distmod: debian71
2016-02-18T20:51:20.538+0000 I CONTROL  [initandlisten]     distarch: x86_64
2016-02-18T20:51:20.538+0000 I CONTROL  [initandlisten]     target_arch: x86_64
2016-02-18T20:51:20.538+0000 I CONTROL  [initandlisten] options: {}
2016-02-18T20:51:20.542+0000 I STORAGE  [initandlisten] wiredtiger_open config: create,cache_size=8G,session_max=20000,eviction=(threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),
2016-02-18T20:51:20.615+0000 I CONTROL  [initandlisten] 
2016-02-18T20:51:20.615+0000 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2016-02-18T20:51:20.615+0000 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2016-02-18T20:51:20.615+0000 I CONTROL  [initandlisten] 
2016-02-18T20:51:20.615+0000 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2016-02-18T20:51:20.615+0000 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2016-02-18T20:51:20.615+0000 I CONTROL  [initandlisten] 
2016-02-18T20:51:20.616+0000 I FTDC     [initandlisten] Initializing full-time diagnostic data capture with directory '/data/db/diagnostic.data'
2016-02-18T20:51:20.616+0000 I NETWORK  [HostnameCanonicalizationWorker] Starting hostname canonicalization worker
2016-02-18T20:51:20.633+0000 I NETWORK  [initandlisten] waiting for connections on port 27017

docker 或 Mongo 有什么问题？我到处寻找答案，但到目前为止没有任何效果。docker 或 Mongo 坏了吗？

编辑： 我做了更多调查，发现我无法从容器内部访问互联网。我通过运行连接到它docker exec -ti api /bin/bash，然后尝试 ping google 或其他东西，命令只是挂起。

我似乎只能通过--net=host在docker run命令中使用来获得从容器到外部世界的互联网连接。

Answer 1

您必须告诉容器使用它自己的 IP 地址而不是 localhost。

例如，假设您使用 生成了脚手架代码expressjs，您必须写入routes/index.js

var mongodb = require('mongodb');
router.get('/thelist', function(req, res){

  // Get a Mongo client to work with the Mongo server
  var MongoClient = mongodb.MongoClient;

  // Define where the MongoDB server is
  var url = 'mongodb://172.17.0.5:27017/dbname';

  // Connect to the server
  MongoClient.connect(url, function (err, db) {
  .........

这里172.17.0.5是$CONTAINER_IP

您可以通过以下方式找到容器IP $ docker inspect $CONTAINER_NAME | grep IPAddress

如果容器中没有互联网

用 sudo 打开sudo vim /etc/NetworkManager/NetworkManager.conf并注释掉该行dns=dnsmasq，这样您现在就可以：

[main]                        
plugins=ifupdown,keyfile,ofono
#dns=dnsmasq                  

[ifupdown]                    
managed=false                 

编辑：服务名称而不是 IP

您现在可以使用服务名称而不是容器的 IP 地址，例如：

  // Define where the MongoDB server is
  var url = 'mongodb://api:27017/dbname';

Answer 2

这里的问题是 - 如果容器侦听 127.0.0.1，则主机无法将端口映射到它。

你需要监听0.0.0.0或者类似的，然后才能-p到达容器的接口。