link是過(guò)時(shí)的了，盡量不要用。

dns內(nèi)部集成，也可以用外部。

expose只是用于記錄，并不真的。

publish是否起作用，也要看情況，是否被占用端口。

--------------------------------------

?

Embedded DNS server

Docker daemon runs an embedded DNS server which provides DNS resolution among containers connected to the same user-defined network, so that these containers can resolve container names to IP addresses. If the embedded DNS server is unable to resolve the request, it will be forwarded to any external DNS servers configured for the container. To facilitate this when the container is created, only the embedded DNS server reachable at?127.0.0.11?will be listed in the container’s?resolv.conf?file. For more information on embedded DNS server on user-defined networks, see?embedded DNS server in user-defined networks

Exposing and publishing ports

In Docker networking, there are two different mechanisms that directly involve network ports: exposing and publishing ports. This applies to the default bridge network and user-defined bridge networks.

• You expose ports using the?EXPOSE?keyword in the Dockerfile or the?--expose?flag to?docker run. Exposing ports is a way of documenting which ports are used, but does not actually map or open any ports. Exposing ports is optional.

• You publish ports using the?PUBLISH?keyword in the Dockerfile or the?--publish?flag to?docker run. This tells Docker which ports to open on the container’s network interface. When a port is published, it is mapped to an available high-order port (higher than?30000) on the host machine, unless you specify the port to map to on the host machine at runtime. You cannot specify the port to map to on the host machine in the Dockerfile, because there is no way to guarantee that the port will be available on the host machine where you run the image.

  This example publishes port 80 in the container to a random high port (in this case,?32768) on the host machine.

  $ docker run -it -p 80 nginx$ docker ps64879472feea nginx "nginx -g 'daemon ..." 43 hours ago Up About a minute 443/tcp, 0.0.0.0:32768->80/tcp blissful_mclean

  The next example specifies that port 80 should be mapped to port 8080 on the host machine. It will fail if port 8080 is not available.

  $ docker run -it -p 80:8080 nginx$ docker psb9788c7adca3 nginx "nginx -g 'daemon ..." 43 hours ago Up 3 seconds 80/tcp, 443/tcp, 0.0.0.0:80->8080/tcp goofy_brahmagupta

Links

Before Docker included user-defined networks, you could use the Docker?--link?feature to allow a container to resolve another container’s name to an IP address, and also give it access to the linked container’s environment variables. Where possible, you should avoid using the legacy?--link?flag.

When you create links, they behave differently when you use the default?bridge?network or when you use user-defined bridge networks. For more information, see?Legacy Links?for link feature in default?bridge?network and the?linking containers in user-defined networks?for links functionality in user-defined networks.

轉(zhuǎn)載于:https://www.cnblogs.com/aguncn/p/6880525.html

創(chuàng)作挑戰(zhàn)賽新人創(chuàng)作獎(jiǎng)勵(lì)來(lái)咯，堅(jiān)持創(chuàng)作打卡瓜分現(xiàn)金大獎(jiǎng)

總結(jié)

以上是生活随笔為你收集整理的docker官方文档中的dns,link,expose,publish的全部?jī)?nèi)容，希望文章能夠幫你解決所遇到的問(wèn)題。

如果覺(jué)得生活随笔網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔推薦給好友。