docker docker-compose up method Now listening on: http://[::]:80

Question

Have created an dotnet core application and when run the command:

docker-compose up

everything goes well but I don't understand what does the below line mean:

Now listening on: http://[::]:80

Dockerfile content is:

FROM microsoft/aspnetcore:2.0
ARG source 
WORKDIR /app 
EXPOSE 80 
COPY ${source:-obj/Docker/publish} . 
ENTRYPOINT ["dotnet", "SampleCoreApp.dll"]

docker-compose file is:

version: '3'
services:
 samplecoreapp:
   image: samplecoreapp
   build:
     context: ./SampleCoreApp
     dockerfile: Dockerfile

Why is that I'm not seeing the IP address?

If i have a 3 VMs and if I want to run this application on VM2 then how can I deploy this docker container to VM2?

Answer 1

Now listening on: http://[::]:80 表示：您的应用程序告诉您它正在侦听它拥有的所有IPv6地址上的TCP端口80。

详细说明： [::] 是URL中IPv6地址0000:0000:0000:0000:0000:0000:0000:0000的简写符号。请注意，::不是有效的IPv6地址，但通常用作＆＃34;所有IPv6地址的别名＆＃34;。

同样，侦听其所有IPv4地址的TCP端口80的Web服务器通常会报告它正在监听http://0.0.0.0:80。在您的情况下，它似乎期待IPv6流量。但是，许多应用程序都是双栈并且同时监听IPv4和IPv6。