Cannot connect postgres to pgadmin using docker-compose - postgresql

Question

I have the following docker-compose file:
services:
pgdatabase:
image: postgres:13
environment:
- POSTGRES_USER=root
- POSTGRES_PASSWORD=root
- POSTGRES_DB=ny_taxi
volumes:
- "./data:/var/lib/postgresql/data:rw"
ports:
- "5432:5432"
pgadmin:
image: dpage/pgadmin4
environment:
- PGADMIN_DEFAULT_EMAIL=admin#admin.com
- PGADMIN_DEFAULT_PASSWORD=root
volumes:
- "./data_pgadmin:/var/lib/pgadmin"
ports:
- "8080:80"
I'm trying to connect to postgres using pgadmin but I'm getting the following error:
Unable to connect to server: could not translate host name "pgdatabase" to address: Name does not resolve
Running docker network ls I get:
NAME DRIVER SCOPE
bridge bridge local
docker-sql-pg_default bridge local
host host local
none null local
Then running docker network inspect docker-sql-pg_default I get
[
{
"Name": "docker-sql-pg_default",
"Id": "bfee2f08620b5ffc1f8e10d8bed65c4d03a98a470deb8b987c4e52a9de27c3db",
"Created": "2023-01-24T17:57:27.831702189Z",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.24.0.0/16",
"Gateway": "172.24.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"8f53be84a95c9c0591df6cc6edb72d4ca070243c3c067ab2fb14c2094b23bcee": {
"Name": "docker-sql-pg-pgdatabase-1",
"EndpointID": "7f3ddb29b000bc4cfda9c54a4f13e0aa30f1e3f8e5cc1a8ba91cee840c16cd60",
"MacAddress": "02:42:ac:18:00:02",
"IPv4Address": "172.24.0.2/16",
"IPv6Address": ""
},
"bf2eb29b73fe9e49f4bef668a1f70ac2c7e9196b13350f42c28337a47fcd71f4": {
"Name": "docker-sql-pg-pgadmin-1",
"EndpointID": "b3a9504d75e11aa0f08f6a2b5c9c2f660438e23f0d1dd5d7cf4023a5316961d2",
"MacAddress": "02:42:ac:18:00:03",
"IPv4Address": "172.24.0.3/16",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {
"com.docker.compose.network": "default",
"com.docker.compose.project": "docker-sql-pg",
"com.docker.compose.version": "2.13.0"
}
}
]
I tried to connect to the gateway IP 172.24.0.1 and the IP of postgres base 172.24.0.2 but I got timeout error. Why my network isn't running?

Answer 1

Basically I solved my problem using the following steps:
First I accessed the pg-admin container and I used ping to verify if the pgadmin could reach the postgres.
Since pgadmin was reaching postgres I used sudo netstat -tulpn | grep LISTEN to verify in my host machine the ports that are in use. surprisingly I have two instances of pgadmin running on 8080 (one bugged).
I used docker-compose down to stop the servers and used docker system prune to delete all images/containers...
I verified the used ports again and one pgadmin still running on 8080.
I used pidof to check the PID of running (bugged) pgadmin.
Then I used kill -9 to kill the proccess.
Last, I used docker-compose up -d and I was able to communicate pgadmin with postgres via pgadmin interface.