docker--container的port映射
使用nginx为例
先运行nginx
[root@localhost ~]# docker run --name web -d nginx
Unable to find image 'nginx:latest' locally
latest: Pulling from library/nginx
0a4690c5d889: Pull complete
9719afee3eb7: Pull complete
44446b456159: Pull complete
Digest: sha256:b4b9b3eee194703fc2fa8afa5b7510c77ae70cfba567af1376a573a967c03dbb
Status: Downloaded newer image for nginx:latest
WARNING: IPv4 forwarding is disabled. Networking will not work.
06537c95ca2e0c1885a93755e9fa92aa1a8c7b98ce169764c3197e0208febf79
[root@localhost ~]# docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
06537c95ca2e nginx "nginx -g 'daemon of…" 8 minutes ago Up 8 minutes 80/tcp web
19216c85489e busybox "/bin/sh -c 'while t…" About an hour ago Up About an hour test4
cec10f0cd32d busybox "/bin/sh -c 'while t…" 6 hours ago Up 6 hours test3
68789fa4dc47 busybox "/bin/sh -c 'while t…" 19 hours ago Up 19 hours test2
cba625871070 busybox "/bin/sh -c 'while t…" 24 hours ago Up 24 hours test1
[root@localhost ~]#
查看 IP
[root@localhost ~]# docker network inspect bridge
[
{
"Name": "bridge",
"Id": "4e8172ef8e0169e74285225030d0b5f271494df46c4f7bc3ba38e9ca87a1c6f9",
"Created": "2019-07-17T06:50:29.144315528-07:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.17.0.0/16",
"Gateway": "172.17.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"06537c95ca2e0c1885a93755e9fa92aa1a8c7b98ce169764c3197e0208febf79": {
"Name": "web",
"EndpointID": "8ee4eb75d3551bd76a19790f0bdc9f8bbd555e5674daa69e9b51e96d38deb9f1",
"MacAddress": "02:42:ac:11:00:04",
"IPv4Address": "172.17.0.4/16",
"IPv6Address": ""
},
在宿主机能访问nginx
[root@localhost ~]# curl http://172.17.0.4
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p> <p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p> <p><em>Thank you for using nginx.</em></p>
</body>
</html>
[root@localhost ~]#
我的宿主机是在VMware虚拟的centos，因为IP是绑定在nginx container网络空间， 想要让nginx能从外面访问，则需要做端口映射，把container上的80端口，映射到宿主机上
[root@localhost ~]# docker run -d --name web -p : nginx #-p 8080:80 把本地8080端口映射到container 80端口
c24bf84a9d3bdd46fa33f13032c27bbba22ff4cb24ba9cb2309d2570a41e2853
[root@localhost ~]# docker container ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c24bf84a9d3b nginx "nginx -g 'daemon of…" seconds ago Up seconds 0.0.0.0:->/tcp web
[root@localhost ~]# docker network inspect bridge #查看container IP
[
{
"Name": "bridge",
"Id": "ac664a242c917c931998806bfc970c0fb3c7c9c5b0cbed7769b5a71978ff9748",
"Created": "2019-07-19T02:40:37.951941039-07:00",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.17.0.0/16",
"Gateway": "172.17.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"c24bf84a9d3bdd46fa33f13032c27bbba22ff4cb24ba9cb2309d2570a41e2853": {
"Name": "web",
"EndpointID": "0eab9a9edb82d03bec9193175689159a2c8826ecfa70b183e84227251a5713fe",
"MacAddress": "02:42:ac:11:00:02",
"IPv4Address": "172.17.0.2/16",
"IPv6Address": ""
}
},
"Options": {
"com.docker.network.bridge.default_bridge": "true",
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true",
"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
"com.docker.network.bridge.name": "docker0",
"com.docker.network.driver.mtu": ""
},
"Labels": {}
}
]
[root@localhost ~]# curl http://172.17.0.2 #访问container IP可以访问
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p> <p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p> <p><em>Thank you for using nginx.</em></p>
</body>
</html>
[root@localhost ~]# curl http:/127.0.0.1:
curl: () Could not resolve host: http; Name or service not known
[root@localhost ~]# curl http://127.0.0.1:8080 #测试宿主机 8080端口
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p> <p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p> <p><em>Thank you for using nginx.</em></p>
</body>
</html>
[root@localhost ~]#
如果本机是公网IP，则可以直接互联网访问，我这是虚拟机，如果虚拟机网络模式是NAT，则在本地可以直接用虚拟机IP:8080访问，如果想用本地IP则需要配置NAT端口转换，比如下面：
配置生效后我可以用本地IP:8081访问 web
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