Not able to connect to Postgres database from golang Docker container - postgresql

Question

I am trying to connect to a Postgres database in a separate container from another separate container that stores a Go server:
Pool, err = pgxpool.Connect(context.Background(),"postgres://postgres:postgres#postgres:5432/postgres")
After doing so, I receive the following error:
2020/09/25 13:40:08 failed to connect to `host=postgres user=postgres database=postgres`: hostname resolving error (lookup postgres on 192.168.65.1:53: no such host)
Here is the docker-compose.yml:
version: "3.8"
services:
postgres:
image: postgres:alpine
environment:
- POSTGRES_DB=postgres
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=postgres
ports:
- 5432:5432
restart: always
server:
build: .
depends_on:
- postgres
ports:
- "2302:2302"
- "80:80"
restart: always
I am successfully able to connect to the Postgres database from my OS. Here are the Postgres container initialization logs:
postgres_1 |
postgres_1 | PostgreSQL Database directory appears to contain a database; Skipping initialization
postgres_1 |
postgres_1 | 2020-09-25 15:37:50.529 UTC [1] LOG: starting PostgreSQL 13.0 on x86_64-pc-linux-musl, compiled by gcc (Alpine 9.3.0) 9.3.0, 64-bit
postgres_1 | 2020-09-25 15:37:50.529 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port 5432
postgres_1 | 2020-09-25 15:37:50.529 UTC [1] LOG: listening on IPv6 address "::", port 5432
postgres_1 | 2020-09-25 15:37:50.532 UTC [1] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
postgres_1 | 2020-09-25 15:37:50.536 UTC [20] LOG: database system was shut down at 2020-09-25 15:37:49 UTC
postgres_1 | 2020-09-25 15:37:50.540 UTC [1] LOG: database system is ready to accept connections
Any clues would be helpful. Thank you in advance.

Answer 1

Try to share a network
version: "3.8"
services:
postgres:
image: postgres:alpine
environment:
- POSTGRES_DB=postgres
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=postgres
ports:
- 5432:5432
restart: always
networks: [ "go_develop" ]
server:
build: .
depends_on:
- postgres
ports:
- "2302:2302"
- "80:80"
restart: always
networks: [ "go_develop" ]
networks:
go_develop:
driver: bridge