ECONNREFUSED for Postgres on nodeJS with dockers
when I run
it starts the pg database
database system is ready to accept connections
and the nodejs server.
but the server can’t connect to database.
Error: connect ECONNREFUSED 127.0.01:5432
If I try to run the server without using containers (with real nodejs and postgresd on my machine) it works.
But I want it to work correctly with containers. I don’t understand what i’m doing wrong.
here is the
web: image: node command: npm start ports: - "8000:4242" links: - db working_dir: /src environment: SEQ_DB: mydatabase SEQ_USER: username SEQ_PW: pgpassword PORT: 4242 DATABASE_URL: postgres://username:firstname.lastname@example.org:5432/mydatabase volumes: - ./:/src db: image: postgres ports: - "5432:5432" environment: POSTGRES_USER: username POSTGRES_PASSWORD: pgpassword
Could someone help me please?
(someone who likes docker 🙂 )
One Solution collect form web for “ECONNREFUSED for Postgres on nodeJS with dockers”
DATABASE_URL refers to
127.0.0.1, which is the loopback adapter (more here). This means “connect to myself”.
When running both applications (without using Docker) on the same host, they are both addressable on the same adapter (also known as
When running both applications in containers they are not both on localhost as before. Instead you need to point the
web container to the
db container’s IP address on the
docker0 adapter – which
docker-compose sets for you.
This works thanks to Docker links: the
web container has a file (
/etc/hosts) with a
db entry pointing to the IP that the
db container is on. This is the first place a system (in this case, the container) will look when trying to resolve hostnames.