How to make container image of multi-port httpserver

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Create / root/myapp directory

[root@xbldockerbuild myapp] # tree / root/myapp/root/myapp ├── Dockerfile └── src └── app.js1 directory, 2 files

The contents of app.js and Dockerfile are as follows

[root@xbldockerbuild myapp] # cat src/app.js var http=require ('http'); var ports = [7006, 7007, 7008, 7009]; var servers = []; var Content-Type':'text/plain' function reqHandler (req, res) {var serPort=req.socket.localPort; res.writeHead (200, {' Content-Type':'text/plain'}); res.write ('Listening on port' + serPort); res.end ();} ports.forEach (function (port) {s = http.createServer (reqHandler)) S.listen (port); servers.push (s);})

[root@xbldockerbuild myapp] # cat Dockerfile FROM alpine:3.8RUN apk updateRUN apk add-no-cache nodejsCOPY. / src / appCMD ["/ usr/bin/node", "/ app/app.js"] EXPOSE 7006/tcpEXPOSE 7007/tcpEXPOSE 7008/tcpEXPOSE 7009/tcp

Making container image by docker build

[root@xbldockerbuild myapp] # dockerbuild-t alpine-node-multiple-ports:v1 .Sending build context to Docker daemon 3.584 kBStep 1 pick 9: FROM alpine:3.8-- > dac705114996Step 2 dockerbuild 9: RUN apk update-- > Using cache-- > a822afa9e3edStep 3 hand 9: RUN apk add-- no-cache nodejs-- > Using cache-- > 325de7d2e3a6Step 4 hand 9: COPY. / src / app-- > Using cache-- > 177b34cc5674Step 5max 9: CMD / usr/bin/node / app/app.js-> Using cache-> 3c1f8e2407dcStep 6 EXPOSE 7008/tcp 9: EXPOSE 7006/tcp-- > Running in 925b1e84e222-- > eaa8e957002dRemoving intermediate container 925b1e84e222Step 7 EXPOSE 7008/tcp 9: EXPOSE 7007/tcp-> Running in 3bed5ab873f2-- > 36a58dc9fa46Removing intermediate container 3bed5ab873f2Step 8 EXPOSE 7008/tcp 9: EXPOSE 7008/tcp-- > Running in d059f2383111-- > 3c8f23df8971Removing intermediate container d059f2383111Step 9 EXPOSE 7009/tcp-> Running in 095a0e5748c1-> 5c04fe5beb8cRemoving intermediate container 095a0e5748c1Successfully built 5c04fe5beb8c [root@xbldockerbuild myapp] # docker imagesREPOSITORY TAG IMAGE ID CREATED SIZEalpine-node-multiple-ports v1 5c04fe5beb8c 41 seconds ago 32.6 MB

Create a container test

[root@xbldockerbuild myapp] # docker run-d-it-- name httpserver alpine-node-multiple-ports:v1d511b5157cbdc40da55623cbf6a3c20a0317eac3e52c3239236ae1c514536044 [root@xbldockerbuild myapp] # docker ps-a | grep httpserverd511b5157cbd alpine-node-multiple-ports:v1 "/ usr/bin/node / ap..." 27 seconds ago Up 26 seconds 7006-7009/tcp httpserver [root@xbldockerbuild myapp] # docker inspect httpserver | grep IPAddress "SecondaryIPAddresses": null "IPAddress": "172.17.0.6", "IPAddress": "172.17.0.6" [root@xbldockerbuild myapp] # curl http://172.17.0.6:7006/Listening on port 7006 [root@xbldockerbuild myapp] # curl http://172.17.0.6:7007/Listening on port 7007 [root@xbldockerbuild myapp] # curl http://172.17.0.6:7008/Listening on port 7008 [root@xbldockerbuild myapp] # curl http://172.17.0.6:7009/Listening on port 7009

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