Docker: Unable to connect to container from host - docker

Question

I try to use docker-compose in order to run an app which consists of 2 container: akka app and postgresql.
Here is yaml file:
version: "3"
services:
api:
image: akka-app:latest
ports:
- "9000:5000"
db:
image: postgres-db:latest
After the docker-compose up command I see that containers are up and running using docker ps command:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
65326e5a9677 akka-app:latest "java -cp /..." 40 minutes ago Up 23 seconds 0.0.0.0:9000->5000/tcp samplecompose_api_1
1f86273c4f9a postgres-db:latest "docker-ent..." 19 hours ago Up 23 seconds 5432/tcp samplecompose_db_1
But when I try to access the akka-app from the host via the GET request to 0.0.0.0:9000/status or localhost:9000/status I get back "refused to connect" error in the postman.
Extra information:
Docker version 17.06.0-ce, build 02c1d87
docker-compose version
1.14.0, build c7bdf9e MacOS Sierra 10.12.5
Network settings of the akka-app container:
"NetworkSettings": {
"Bridge": "",
"SandboxID": "5b5b322ffb0fb881317f8cb4e69b8fd887566b8c5b73940174aabace35d816f8",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"5000/tcp": [
{
"HostIp": "0.0.0.0",
"HostPort": "9000"
}
]
},
"SandboxKey": "/var/run/docker/netns/5b5b322ffb0f",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "",
"Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"MacAddress": "",
"Networks": {
"pinpointcompose_default": {
"IPAMConfig": null,
"Links": null,
"Aliases": [
"api",
"65326e5a9677"
],
"NetworkID": "925c8379c6d5b334177d7d198d1d38e29983903474183bee5734df9d30ab9810",
"EndpointID": "c7c37f545b00c6a19863315858e93a79f10b54b5675dc2cb8704d2f2f9b2bb1c",
"Gateway": "172.18.0.1",
"IPAddress": "172.18.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:12:00:02"
}
}
}
UPDATE:
docker-compose output:
docker-compose up
Starting samplecompose_api_1 ...
Starting samplecompose_api_1
Starting samplecompose_db_1 ...
Starting samplecompose_api_1 ... done
Attaching to samplecompose_db_1, samplecompose_api_1
db_1 | LOG: database system was shut down at 2017-07-06 08:54:56 UTC
db_1 | LOG: MultiXact member wraparound protections are now enabled
api_1 | 09:04:26.030 [default-akka.actor.default-dispatcher-3] INFO akka.event.slf4j.Slf4jLogger - Slf4jLogger started
api_1 | 09:04:27.472 [default-akka.actor.default-dispatcher-4] INFO sample-service - Bound to /0.0.0.0:5000

Answer 1

The problem was in an old VirtualBox installed who knows when on my laptop. So while it was installed I could not access running docker containers via localhost...
You can read more about this on official docker site
After I uninstalled the VirtualBox from the laptop, then restarted the Docker app and relaunched the terminal sessions it was unreal to use localhost for access to the containers.
Instead of the localhost I used the IP which I got from the docker-machine ip default. But this is not the good way.
So ensure once again that you meet all of the requirements.