Keycloak Postgres docker connection failure - postgresql

Question

I am trying to get up the keycloak instance via using keycloak, and the compose file I used is below which I get it from
https://github.com/keycloak/keycloak-containers/blob/main/docker-compose-examples/keycloak-postgres.yml
# keycloak dependencies
postgres-keycloak:
image: postgres
volumes:
- postgres_data:/var/lib/postgresql/data
environment:
POSTGRES_DB: keycloak
POSTGRES_USER: keycloak
POSTGRES_PASSWORD: password
keycloak:
image: quay.io/keycloak/keycloak:legacy
environment:
DB_VENDOR: POSTGRES
DB_ADDR: postgres
DB_DATABASE: keycloak
DB_USER: keycloak
DB_SCHEMA: public
DB_PASSWORD: password
KEYCLOAK_USER: admin
KEYCLOAK_PASSWORD: admin
# Uncomment the line below if you want to specify JDBC parameters. The parameter below is just an example, and it shouldn't be used in production without knowledge. It is highly recommended that you read the PostgreSQL JDBC driver documentation in order to use it.
#JDBC_PARAMS: "ssl=true"
ports:
- 8082:8082
depends_on:
- postgres-keycloak
volumes:
postgres_data:
driver: local
When I run the file I am getting connection errors as below :
backend_services-keycloak-1 | Caused by: javax.resource.ResourceException: IJ031084: Unable to create connection
backend_services-keycloak-1 | Caused by: org.postgresql.util.PSQLException: FATAL: password authentication failed for user "keycloak"
backend_services-keycloak-1 | 08:53:53,533 FATAL [org.keycloak.services] (ServerService Thread Pool -- 68) Error during startup: java.lang.RuntimeException: Failed to connect to database
backend_services-keycloak-1 | Caused by: javax.resource.ResourceException: IJ000453: Unable to get managed connection for java:jboss/datasources/KeycloakDS
backend_services-keycloak-1 | 08:53:54,449 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: ([("subsystem" => "metrics")]): java.lang.NullPointerException
backend_services-keycloak-1 | 08:53:54,460 ERROR [org.jboss.as.server] (ServerService Thread Pool -- 45) WFLYSRV0022: Deploy of deployment "keycloak-server.war" was rolled back with no failure message

Answer 1

You can try this if you want, Application named test,
Database login are, keycloak:password
keycloak admin login is : root:root
this will be accessible with a web browser at localhost:8080
version: "3.8"
name: test
services:
keycloak:
image: jboss/keycloak:15.0.2
environment:
DB_VENDOR: POSTGRES
DB_ADDR: postgres
DB_DATABASE: keycloak
DB_USER: keycloak
DB_SCHEMA: public
DB_PASSWORD: password
KEYCLOAK_USER: root
KEYCLOAK_PASSWORD: root
KEYCLOAK_HOSTNAME: keycloak
# Uncomment the line below if you want to specify JDBC parameters. The parameter below is just an example, and it shouldn't be used in production without knowledge. It is highly recommended that you read the PostgreSQL JDBC driver documentation in order to use it.
#JDBC_PARAMS: "ssl=true"
ports:
- 8080:8080
depends_on:
- postgres
networks:
- test
postgres:
image: postgres
volumes:
- postgres_data:/var/lib/postgresql/data
environment:
POSTGRES_DB: keycloak
POSTGRES_USER: keycloak
POSTGRES_PASSWORD: password
networks:
- test
volumes:
postgres_data:
driver: local
networks:
test:
driver: bridge

Answer 2

This docker-compose.yml will be works.
You did a wrong two places (DB_ADDR and port forwarding)
version: '3'
services:
postgres-keycloak:
image: postgres
volumes:
- postgres_data:/var/lib/postgresql/data
environment:
POSTGRES_DB: keycloak
POSTGRES_USER: keycloak
POSTGRES_PASSWORD: password
keycloak:
image: quay.io/keycloak/keycloak:legacy
environment:
DB_VENDOR: POSTGRES
DB_ADDR: postgres-keycloak
DB_DATABASE: keycloak
DB_USER: keycloak
DB_SCHEMA: public
DB_PASSWORD: password
KEYCLOAK_USER: admin
KEYCLOAK_PASSWORD: admin
# Uncomment the line below if you want to specify JDBC parameters. The parameter below is just an example, and it shouldn't be used in production without knowledge. It is highly recommended that you read the PostgreSQL JDBC driver documentation in order to use it.
#JDBC_PARAMS: "ssl=true"
ports:
- 8082:8080
depends_on:
- postgres-keycloak
volumes:
postgres_data:
driver: local
And open URL
http://localhost:8082/auth/
Click here then credential admin/admin (id / password)