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着上一篇 aspnetcore容器化(docker)部署(一) —— 入门，在单个容器helloworld的基础上引入nginx反向代理服务器组成多容器应用。
配置转接头。详见：
startup.cs
我要评论public void configure(iapplicationbuilder app, ihostingenvironment env)
{
if (env.isdevelopment())
{
app.usedeveloperexceptionpage();
}
else
{
app.useexceptionhandler("/home/error");
}
app.useforwardedheaders(new forwardedheadersoptions
{
forwardedheaders = forwardedheaders.xforwardedfor | forwardedheaders.xforwardedproto
});
app.usestaticfiles();
app.usecookiepolicy();
app.usemvc(routes =>
{
routes.maproute(
name: "default",
template: "{controller=home}/{action=index}/{id?}");
});
}
重新构建helloworld镜像并生成容器
ps c:\users\administrator> docker images repository tag image id created size helloworld v1.1 a57e147d8487 about an hour ago 265mb mcr.microsoft.com/dotnet/core/sdk 2.2-stretch e4747ec2aaff 2 weeks ago 1.74gb mcr.microsoft.com/dotnet/core/aspnet 2.2-stretch-slim f6d51449c477 2 weeks ago 260mb docker4w/nsenter-dockerd latest 2f1c802f322f 7 months ago 187kb ps c:\users\administrator> docker ps -a container id image command created status ports names c8ec48808318 helloworld:v1.1 "dotnet helloworld.d…" about an hour ago up 12 minutes 0.0.0.0:81->80/tcp netcore_helloworld
nginx官方镜像和构建教程
1.创建一个nginx配置文件
helloworld.conf
server {
listen 801; #监听801端口
location / {
proxy_pass http://netcore_helloworld:80; #默认80端口可不加端口号，这里转发没有使用ip而是containerid
}
}
2.自定义nginx镜像的dockerfile
#定义基础镜像 nginx:latest from nginx #复制自定义的配置文件到nginx配置文件目录下 copy helloworld.conf /etc/nginx/conf.d/helloworld.conf #暴露80端口到外部 expose 80 #容器运行参数 cmd ["nginx", "-g", "daemon off;"]
3.构建mynginx镜像
ps c:\users\administrator> cd c:\users\administrator\source\repos\aspnetcore_docker\mynginx ps c:\users\administrator\source\repos\aspnetcore_docker\mynginx> docker build -t mynginx:v1.0 . sending build context to docker daemon 3.072kb step 1/4 : from nginx ---> 62c261073ecf step 2/4 : copy helloworld.conf /etc/nginx/conf.d/helloworld.conf ---> 0514a786be49 step 3/4 : expose 80 ---> running in 0693d4c225ef removing intermediate container 0693d4c225ef ---> 7546051297e3 step 4/4 : cmd ["nginx", "-g", "daemon off;"] ---> running in 7f7634a0d689 removing intermediate container 7f7634a0d689 ---> 4b260c730139 successfully built 4b260c730139 successfully tagged mynginx:v1.0 security warning: you are building a docker image from windows against a non-windows docker host. all files and directories added to build context will have '-rwxr-xr-x' permissions. it is recommended to double check and reset permissions for sensitive files and directories.
ps c:\users\administrator\source\repos\aspnetcore_docker\mynginx> docker images repository tag image id created size mynginx v1.0 f554133b97ee 9 seconds ago 109mb helloworld v1.1 a57e147d8487 about an hour ago 265mb nginx latest 62c261073ecf 5 days ago 109mb mcr.microsoft.com/dotnet/core/sdk 2.2-stretch e4747ec2aaff 2 weeks ago 1.74gb mcr.microsoft.com/dotnet/core/aspnet 2.2-stretch-slim f6d51449c477 2 weeks ago 260mb docker4w/nsenter-dockerd latest 2f1c802f322f 7 months ago 187kb
4.创建nginx容器
容器内80和801端口分别映射到外部(宿主机)的80和801端口，-p 外部端口:内部端口
ps c:\users\administrator> docker run --name mynginx -d -p 801:801 -p 80:80 f554133b97ee 1b2751b1dba6bb4b97f8c78cda8646709ea80da03e5136025cf52dc3a3cc740d ps c:\users\administrator> docker ps -a container id image command created status ports names dae033fe1b5c f554133b97ee "nginx -g 'daemon of…" 18 seconds ago up 17 seconds 0.0.0.0:80->80/tcp, 0.0.0.0:801->801/tcp mynginx c8ec48808318 helloworld:v1.1 "dotnet helloworld.d…" 8 minutes ago up 8 minutes 0.0.0.0:81->80/tcp netcore_helloworld
5.验证nginx
80端口访问正常
801端口转发失败，应该说是无法识别http://netcore_helloworld这个地址，因为容器之间是相互隔离的。
所以需要使用bridge networks创建一个桥接网络将多个容器(网络)连接起来进行通信。
另外，使用link的方式进行ip映射也可以达到容器间通信的效果，跟windows里面修改hosts文件ip映射hostname类似，需要注意的是link这个(废弃)已过时的特性会在将来的版本中移除，不推荐使用。
官方介绍
1.创建一个network
docker network create [options] network
ps c:\users\administrator> docker network create mybridge 475a135ea2524de25f5594e35f2640e39c22365336092dc34f17e1019252eab1 ps c:\users\administrator> docker network ls network id name driver scope d1110fd56b8c bridge bridge local 194bf7b8bfea mybridge bridge local c8ddf53079b8 host host local 522c9e7cfbcb none null local
2.将容器加入到network
docker network connect [options] network container
加入之后需要重启容器，或者在创建容器时就指定docker run --network=bridgename ....
ps c:\users\administrator> docker network connect mybridge dae033fe1b5c ps c:\users\administrator> docker network connect mybridge c8ec48808318 ps c:\users\administrator> docker restart dae033fe1b5c c8ec48808318 dae033fe1b5c c8ec48808318
查看mybridge的information
ps c:\users\administrator> docker inspect 194bf7b8bfea
[
{
"name": "mybridge",
"id": "194bf7b8bfeafdbfb8842c0d6252962c8cb1367c60d8742c5830c4446b571198",
"created": "2019-05-21t06:07:35.1683249z",
"scope": "local",
"driver": "bridge",
"enableipv6": false,
"ipam": {
"driver": "default",
"options": {},
"config": [
{
"subnet": "172.18.0.0/16",
"gateway": "172.18.0.1"
}
]
},
"internal": false,
"attachable": false,
"ingress": false,
"configfrom": {
"network": ""
},
"configonly": false,
"containers": {
"c8ec488083184ff419cb1a2b1b67fb92520db276263ee43e97c3f30aa58314d0": {
"name": "netcore_helloworld",
"endpointid": "a21a766a83887b1c5ce44b75affb2bce78433ad307b8a5fa0f991969492ace4c",
"macaddress": "02:42:ac:12:00:04",
"ipv4address": "172.18.0.4/16",
"ipv6address": ""
},
"dae033fe1b5c79c2604df3facb4c714a56e49f3501c34bda125a786b28faef88": {
"name": "mynginx",
"endpointid": "4119532667d868d735c15f584e6e7e27d48308808ef8b58e4d85a8b3e626791a",
"macaddress": "02:42:ac:12:00:03",
"ipv4address": "172.18.0.3/16",
"ipv6address": ""
}
},
"options": {},
"labels": {}
}
]
3.验证
示例代码github地址：https://github.com/wwwu/aspnetcore_docker
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