dockerdockerfilewindows-networking

Windows Docker Container has no NAT IP Address. Cannot access container locally


First to be clear, my docker container has an IP address under NetworkSettings.Networks.bridge. That IP is 172.17.0.2

However I cannot access the container via http://172.17.0.2:3000/ after running it with docker run -p 3000:3000 node:8.10.0

My research shows its rough working with docker locally on windows. In following this short guide: https://blog.sixeyed.com/published-ports-on-windows-containers-dont-do-loopback/

I come across using the network NAT IP address. I see this recommended a few places. But that section of my docker inspect does not exist at all. It returns:

 "NetworkSettings": {                                                                            
 "Bridge": "",                                                                               
 "SandboxID": "0c81d8f7ce5bcba70ec0487bbfe91bc6f221e29d9378c33708fac78d0ae47d3e",            
 "HairpinMode": false,                                                                       
 "LinkLocalIPv6Address": "",                                                                 
 "LinkLocalIPv6PrefixLen": 0,                                                                
 "Ports": {                                                                                  
     "3000/tcp": [                                                                           
         {                                                                                   
             "HostIp": "0.0.0.0",                                                            
             "HostPort": "3000"                                                              
         }                                                                                   
     ]                                                                                       
 },                                                                                          
 "SandboxKey": "/var/run/docker/netns/0c81d8f7ce5b",                                         
 "SecondaryIPAddresses": null,                                                               
 "SecondaryIPv6Addresses": null,                                                             
 "EndpointID": "bbe5f42a5b53c001bd3c2852bc6b22976fb9bab2afcb88b30f6660d7662f526f",           
 "Gateway": "172.17.0.1",                                                                    
 "GlobalIPv6Address": "",                                                                    
 "GlobalIPv6PrefixLen": 0,                                                                   
 "IPAddress": "172.17.0.2",                                                                  
 "IPPrefixLen": 16,                                                                          
 "IPv6Gateway": "",                                                                          
 "MacAddress": "02:42:ac:11:00:02",                                                          
 "Networks": {                                                                               
     "bridge": {                                                                             
         "IPAMConfig": null,                                                                 
         "Links": null,                                                                      
         "Aliases": null,                                                                    
         "NetworkID": "0af66a62bc57ce25491c82f5a13d947ca79f5a879f3c1a6db40a90233eeb04f8",    
         "EndpointID": "bbe5f42a5b53c001bd3c2852bc6b22976fb9bab2afcb88b30f6660d7662f526f",   
         "Gateway": "172.17.0.1",                                                            
         "IPAddress": "172.17.0.2",                                                          
         "IPPrefixLen": 16,                                                                  
         "IPv6Gateway": "",                                                                  
         "GlobalIPv6Address": "",                                                            
         "GlobalIPv6PrefixLen": 0,                                                           
         "MacAddress": "02:42:ac:11:00:02",                                                  
         "DriverOpts": null                                                                  
     }                                                                                       
 }                   

As you can see the NAT section is missing entirely. I cant find anything online that mentions why or how to resolve. I was hoping it missing would be a good thing and make it easier to connect. Alas it does not. Any help is appreciated. Here is the dockerfile:

FROM node:8.10.0
WORKDIR /app
COPY package.json /app
RUN npm install
COPY . /app
CMD ["./node_modules/gulp/bin/gulp.js", "assets"]
CMD [ "node", "app.js" ]
EXPOSE 3000

Solution

  • That's a known bug under docker windows. It is fixed in 19.03. So try updating your docker engine.