I am trying to create a docker which contains my existing postgreSQL database. Here is my docker-compose file :
version: "3.1"
services:
db:
restart: always
image: postgres
container_name: demo-postgres #you can change this
environment:
- POSTGRES_USER=user
- POSTGRES_PASSWORD=pass
- POSTGRES_DB=db
- POSTGRES_PORT=5432
ports:
- "5432:5432"
volumes:
- postgres_data:/var/lib/postgresql/data/
volumes:
postgres_data:
ANd when I type :
docker-compose build
everything is ok but when I type that :
Is the server running on host "localhost" (::1) and accepting TCP/IP connections on port 5432?
Could you help me please ?
Thank you very much !
Related
It is my first time trying to put my Springboot application into one docker container and my PostgresDB into another container.
application.properties:
spring.datasource.url=jdbc:postgresql://localhost:5432/esteticcenter
spring.datasource.username=postgres
spring.datasource.password=admin
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect
spring.jpa.hibernate.ddl-auto = update
dockerfile:
FROM openjdk:8-jdk-alpine
VOLUME /tmp
EXPOSE 8082
RUN mkdir -p /app/
RUN mkdir -p /app/logs/
ADD target/postgres-demo-0.0.1-SNAPSHOT.jar /app/app.jar
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app/app.jar"]
docker-compose.yml:
version: "3"
services:
postgres:
image: postgres:latest
network_mode: bridge
container_name: postgres
volumes:
- postgres-data:/var/lib/postgresql/data
expose:
- 5432
ports:
- 5432:5432
environment:
- POSTGRES_PASSWORD=admin
- POSTGRES_USER=postgres
- POSTGRES_DB=esteticcenter
restart: unless-stopped
# APP*****************************************
springbootapp:
image: springbootapp:latest
network_mode: bridge
container_name: springbootapp
expose:
- 8080
ports:
- 8080:8080
restart: unless-stopped
depends_on:
- postgres
links:
- postgres
volumes:
postgres-data:
Error: org.postgresql.util.PSQLException: Connection to localhost:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
I tried to replace the "localhost" with dbpostgresql or db but in spring.datasource.url like many answers I checked but then "mvn clean package" fails and I can not create the jar. What am I missing here?
Docker compose will create a dedicated network with DNS for your services. Each service will get the service name as hostname (as defined in docker-compose.yml).
Other containers can be accessed from inside this network by their service name.
Changing the hostname for the database in your application.properties file should fix the issue:
spring.datasource.url=jdbc:postgresql://postgres:5432/esteticcenter
I'm trying to configure my docker to pgadmin4 in my nest js project, to do the backend, but when i try connect, show this message "Unable to connect to server:
could not connect to server: Connection refused
Is the server running on host "localhost" (127.0.0.1) and accepting"
I already tried configure the docker-compose.yml with pgadmin configurations, network configurations and
my docker-compose.yml
version: '3'
services:
db:
image: postgres
environment:
POSTGRES_PASSWORD: "12345678"
ports:
- "5432:5432"
volumes:
- ./data/pgadmin/
networks:
- pg-network
pgadmin:
image: dpage/pgadmin4
environment:
PGADMIN_DEFAULT_EMAIL: "monnerat#monnerat.com.br"
PGADMIN_DEFAULT_PASSWORD: "abc"
ports:
- "5050:80"
depends_on:
- db
networks:
- pg-network
networks:
pg-network:
driver: bridge
My actual result is connection refused is server running on host "localhost (127.0.0.1) and accepting"
but i expect he open the pgadmin to create the database
Your docker-compose.yml is good. Please see the attached host name should be 'db'
Using docker to connect springboot to postgres via docker-compose. Using port 5432 on postgres works fine, if i try an port other than that it fails
working code
spring
spring.datasource.url=jdbc:postgresql://db:5432/wwc
spring.datasource.username=wwc
spring.datasource.password=test
spring.datasource.driver-class-name=org.postgresql.Driver
docker-compose
version: '2.1'
services:
db:
container_name: db
image: postgres:9.4
ports:
- 5432:5432
volumes:
- /tmp:/var/lib/postgresql
environment:
- POSTGRES_USER=wwc
- POSTGRES_DB=wwc
- POSTGRES_PASSWORD=test
server:
container_name: spring-boot-rest-server
build:
context: .
dockerfile: Dockerfile.server
ports:
- 8080:8080
logging:
driver: json-file
depends_on:
- db
web:
container_name: nginx-web
links:
- "server:springboot"
build:
context: .
dockerfile: Dockerfile.web
ports:
- 80:80
- 8088:8088
logging:
driver: json-file
depends_on:
- server
**connection refused code **
spring
spring.datasource.url=jdbc:postgresql://db:6000/wwc
spring.datasource.username=wwc
spring.datasource.password=test
spring.datasource.driver-class-name=org.postgresql.Driver
docker-compose
version: '2.1'
services:
db:
container_name: db
image: postgres:9.4
ports:
- 6000:5432
volumes:
- /tmp:/var/lib/postgresql
environment:
- POSTGRES_USER=wwc
- POSTGRES_DB=wwc
- POSTGRES_PASSWORD=test
server:
container_name: spring-boot-rest-server
build:
context: .
dockerfile: Dockerfile.server
ports:
- 8080:8080
logging:
driver: json-file
depends_on:
- db
web:
container_name: nginx-web
links:
- "server:springboot"
build:
context: .
dockerfile: Dockerfile.web
ports:
- 80:80
- 8088:8088
logging:
driver: json-file
depends_on:
- server
error:
spring-boot-rest-server | org.postgresql.util.PSQLException: Connection to db:6000 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
What am i doing wrong?
You are confusing a bit the ports: your "db" container only exports 1 port: 5432. The 6000 that you put in your docker-compose is the port on localhost that you map to that container (db) on that port (5432).
You shouldn't even use the port mappings for the postgres container unless you want to connect from localhost which I guess you don't.
If you want to use another port than 5432 you need to extend the postgres Dockerfile and change the configuration so that postgres starts listening on a different port.
Hope this helps.
In other words: The port mapping configured in docker-compose has no relevancy to how the containers connect to each other. The mapping is only relevant when something/someone attempts to connect to your containers within the docker-compose from the outside. (Like from the localhost, as #Mihai remarked.)
I have a docker-compose file with services for python, nginx, postgres and pgadmin:
services:
postgres:
image: postgres:9.6
env_file: .env
volumes:
- postgres_data:/var/lib/postgresql/data
ports:
- "5431:5431"
pgadmin:
image: dpage/pgadmin4
links:
- postgres
depends_on:
- postgres
environment:
PGADMIN_DEFAULT_EMAIL: admin#admin.com
PGADMIN_DEFAULT_PASSWORD: pwdpwd
volumes:
- pgadmin:/root/.pgadmin
ports:
- "5050:80"
backend:
build:
context: ./foobar # This refs a Dockerfile with Python and Django requirements
command: ["/wait-for-it.sh", "postgres:5431", "--", "/gunicorn.sh"]
volumes:
- staticfiles_root:/foobar/static
depends_on:
- postgres
nginx:
build:
context: ./foobar/docker/nginx
volumes:
- staticfiles_root:/foobar/static
depends_on:
- backend
ports:
- "0.0.0.0:80:80"
volumes:
postgres_data:
staticfiles_root:
pgadmin:
When I run docker-compose up and visit localhost:5050, I see the pgadmin interface. When I try to create a new server there, with localhost or 0.0.0.0 as host name and 5431 as port, I get an error "Could not connect to server". If I remove these and instead enter postgres in the "Service" field, I get the error "definition of service "postgres" not found". How can I connect to the database with pgadmin?
the docker container name changes when you run docker-compose to prefix the folder name (to keep container names unique). You could force the name of the container with container_name property
version: "3"
services:
# postgres database
postgres:
image: postgres:12.3
container_name: postgres
environment:
- POSTGRES_DB=admin
- POSTGRES_USER=admin
- POSTGRES_PASSWORD=admin
- POSTGRES_HOST_AUTH_METHOD=trust # allow all connections without a password. This is *not* recommended for prod
volumes:
- database-data:/var/lib/postgresql/data/ # persist data even if container shuts down
ports:
- "5432:5432"
# pgadmin for managing postgis db (runs at localhost:5050)
# To add the above postgres server to pgadmin, use hostname as defined by docker: 'postgres'
pgadmin:
image: dpage/pgadmin4
container_name: pgadmin
environment:
- PGADMIN_DEFAULT_EMAIL=admin
- PGADMIN_DEFAULT_PASSWORD=admin
- PGADMIN_LISTEN_PORT=5050
ports:
- "5050:5050"
volumes:
database-data:
Another option is to connect the postgres container to localhost with
network_mode: host
But you lose the nice network isolation from docker that way
Be careful that the default postgres port is 5432 not 5431. You should update the port mapping for the postgres service in your compose file. The wrong port might be the reason for the issues you reported. Change the port mapping and then try to connect to postgres:5432. localhost:5432 will not work.
I have a web server built using golang. It works successfully when I test it locally.
However, when I build a docker image for my web server, it can't connect to a running Postgres container.
Here is my docker-compose.yml:
version: '2'
services:
go:
image: golang:1.7
volumes:
- ./:/server/http
ports:
- "80:8080"
links:
- postgres
- mongodb
- redis
environment:
DEBUG: 'true'
PORT: '8080'
postgres:
image: onjin/alpine-postgres:9.5
restart: unless-stopped
ports:
- "5432:5432"
environment:
LC_ALL: C.UTF-8
POSTGRES_USER: user
POSTGRES_PASSWORD: pass
POSTGRES_DB: mydb
mongodb:
image: mvertes/alpine-mongo:3.2.3
restart: unless-stopped
ports:
- "27017:27017"
redis:
image: sickp/alpine-redis:3.2.2
restart: unless-stopped
ports:
- "6379:6379"
My Dockerfile:
FROM golang:1.7
RUN mkdir -p /home/app
WORKDIR /home/app
COPY . /home/app
RUN make deps && make
ENTRYPOINT ["./bin/api-test"]
EXPOSE 8080
The Postgres connection string I am using:
postgresql://user:pass#host/mydb?sslmode=disable
For host, I tried localhost and it returns the following error:
dial tcp [::1]:5432: getsockopt: connection refused
Tried postgres and it returns the following:
dial tcp 202.71.99.194:5432: getsockopt: connection refused
Tried the IP address I get running this command which returns 172.19.0.3:
docker inspect apitest_postgres_1 | grep IPAddress
where apitest_postgres_1 is Postgres container name. It also returned this error:
dial tcp 172.19.0.3:5432: getsockopt: connection timed out
Can you please tell me what I am missing here? I am inexperienced with docker and this took a long time investigating for a solution.
Edit:
I run my golang docker using this command:
docker run --env-file ./example.env --rm -it -p 8080:8080 api-test
example.env is the file contains my environment vars.
Edit 2:
I changed the connection string to the following:
postgresql://user:pass#postgres:5432?sslmode=disable
It returns the following error:
dial tcp: lookup postgres on 192.168.65.1:53: no such host
I'm getting the idea that my mac is the issue here. My default DNS is 8.8.8.8 which should not be a problem.
Looks like you're pulling go image instead of building you're own image.
Instead of image: golang:1.7 replace it with build: . to build and use your Dockerfile.
Also you might need to pass postgres environment variables DB_HOST, DB_USER, DB_PASS etc. you can achieve that but creating for example docker.env file and then add env_file under your go app docker-compose.yml file:
Example docker.env :
DB_HOST=postgres
DB_USER=user
DB_PASS=pass
DB_NAME=mydb
Corrected docker-compose.yml :
version: '2'
services:
app:
build: .
volumes:
- ./:/server/http
ports:
- "80:8080"
links:
- postgres
- mongodb
- redis
environment:
DEBUG: 'true'
PORT: '8080'
env_file:
- docker.env
postgres:
image: onjin/alpine-postgres:9.5
restart: unless-stopped
ports:
- "5432:5432"
environment:
LC_ALL: C.UTF-8
POSTGRES_USER: user
POSTGRES_PASSWORD: pass
POSTGRES_DB: mydb
mongodb:
image: mvertes/alpine-mongo:3.2.3
restart: unless-stopped
ports:
- "27017:27017"
redis:
image: sickp/alpine-redis:3.2.2
restart: unless-stopped
ports:
- "6379:6379"
In order to make a connection to postgres in docker compose becomes established, you need to replace localhost or 127.0.0.1 or postgres in your connection string with the name of the container being mentioned in your docker compose file.
For example, in your docker-compose.yaml file create database like this:
db:
container_name: composepostgres
image: postgres
environment:
and then, in your code when creating your connection string, avoid using 127.0.0.1 or localhost or postgres, and instead use composepostgres in the place of them.
If not doing so, you will face with dial tcp 127.0.0.1:5432: connect: connection refused error.
Take a look a this documentation : https://docs.docker.com/engine/userguide/networking/default_network/configure-dns/
Then, regarding the links in you docker-compose file, replace "host" by "postgres" in you connection string :
postgresql://user:pass#postgres/mydb?sslmode=disable
Let the embedded DNS server do the mapping work because the ip address may change every time you recreate the container.
Also, ensure postgres allows connection (maybe limited to localhost)