Docker.github.io: Cannot access 192.168.99.100 following this tutorial

[LouisMelo]

File: get-started/part4.md

In part 3, the ports was "4000:80". So if you following the tutorial using docker-compose.yml in part 3, you should access 192.168.99.100:4000 to find the result on the webpage.

Or, you should change the docker-compose.yml, make ports to "80:80", then follow the part 4 tutorial~

This issue makes me (a docker newbie) spend a lot time to debug whether the connection is down between nodes, since there are tips to open port 7946 and 4789. Finally I found that these ports are automatically on if you use virtualbox vm. 😁

[roivanov]

Can't even access with port 4000.
Example from part2 alone works fine when inside docker-machine myvm1

$ docker stack ps getstartedlab
ID                  NAME                  IMAGE                        NODE                DESIRED STATE       CURRENT STATE            ERROR               PORTS
up0kv1zd04h2        getstartedlab_web.1   roivanov/get-started:part2   myvm1               Running             Running 6 seconds ago
nmv6nmy9ezig        getstartedlab_web.2   roivanov/get-started:part2   myvm2               Running             Running 23 seconds ago
cdjb0fvjgybl        getstartedlab_web.3   roivanov/get-started:part2   myvm1               Running             Running 6 seconds ago
bij1mdn72fy4        getstartedlab_web.4   roivanov/get-started:part2   myvm1               Running             Running 6 seconds ago
u76hknxyywjq        getstartedlab_web.5   roivanov/get-started:part2   myvm2               Running             Running 23 seconds ago

$ docker-machine ssh myvm1 "netstat -an" | grep 4000
tcp        0      0 :::4000                 :::*                    LISTEN

$ docker-machine ssh myvm1 "netstat -an" | grep -w LISTEN
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
tcp        0      0 :::22                   :::*                    LISTEN
tcp        0      0 :::4000                 :::*                    LISTEN
tcp        0      0 :::2376                 :::*                    LISTEN
tcp        0      0 :::2377                 :::*                    LISTEN
tcp        0      0 :::7946                 :::*                    LISTEN

$ docker-machine ls
NAME    ACTIVE   DRIVER       STATE     URL                         SWARM   DOCKER     ERRORS
myvm1   *        virtualbox   Running   tcp://192.168.99.106:2376           v18.09.0
myvm2   -        virtualbox   Running   tcp://192.168.99.107:2376           v18.09.0

$ curl http://192.168.99.106:4000
curl: (7) Failed to connect to 192.168.99.106 port 4000: Connection refused

$ curl http://192.168.99.107:4000
curl: (7) Failed to connect to 192.168.99.107 port 4000: Connection refused