I have a docker-compose file that looks like this
version: "3"
services:
db:
image: postgres
restart: always
ports:
- "5432:5432"
environment:
POSTGRES_USER: michael
POSTGRES_PASSWORD: pass123
admin:
image: dpage/pgadmin4
restart: always
environment:
PGADMIN_DEFAULT_EMAIL: ${PGADMIN_DEFAULT_EMAIL:-pgadmin4#pgadmin.org}
PGADMIN_DEFAULT_PASSWORD: ${PGADMIN_DEFAULT_PASSWORD:-admin}
PGADMIN_CONFIG_SERVER_MODE: 'False'
ports:
- "5050:5050"
I run docker-compose up -d and I can see my apps running from Docker Desktop. I cannot however connect to my pgadmin instance at port 5050 using localhost. Any ideas?
Docker container of pgAdmin by default runs on port 80 as per the documentation here https://www.pgadmin.org/docs/pgadmin4/latest/container_deployment.html
You are exposing port 5050 through the mapping. Either add a environment variable PGADMIN_LISTEN_PORT to the docker_compose to make pgAdmin run on port 5050
OR
change port mapping to 5050:80 for the pgAdmin service
Check the docker inspect or docker ps results to ensure that you have your port exposed correctly
Try to connect to it using the public IP
Related
I need to resolve a container name to the IP Address from the docker host.
The reason for this is, i need a container to run on the host network, but it must be also able to resolve the container "backend" which it connects also to. (The container must be send & receive multicast packets)
docker-compose.yml
version: "3"
services:
database:
image: mongo
container_name: database
hostname: database
ports:
- "27017:27017"
backend:
image: "project/backend:latest"
container_name: backend
hostname: backend
environment:
- NODE_ENV=production
- DATABASE_HOST=database
- UUID=5025f846-7587-11ed-9ca7-8b992b5e7dd3
ports:
- "8080:8080"
depends_on:
- database
tty: true
frontend:
image: "project/frontend:latest"
container_name: frontend
hostname: frontend
ports:
- "80:80"
- "443:443"
depends_on:
- backend
environment:
- BACKEND_HOST=backend
connector:
image: "project/connector:latest"
container_name: connector
hostname: connector
ports:
- "1900:1900/udp"
#expose:
# - "1900/udp"
environment:
- NODE_ENV=production
- BACKEND_HOST=backend
- STARTUP_DELAY=1500
depends_on:
- backend
network_mode: host
tty: true
How can i resolve the hostname "backend" via docker from the docker host?
dig backend #127.0.0.11 & dig backend #172.17.0.1 did not work.
A test with a docker ubuntu image & socat proves, that i can receive ssdp multicast packets:
docker run --net host -it --rm ubuntu
socat UDP4-RECVFROM:1900,ip-add-membership=239.255.255.250:0.0.0.0,fork -
The only problem i now have is the DNS/Container name resolution from the host (network).
TL;DR
The container "connector" must be on the host network,but also be able to resolve the container name "backend" to the docker internal IP Address.
NOTE: Perhaps this is better suited on superuser or similar?
This is my docker-compose.yml
services:
db:
container_name: postgres
image: postgres:latest
restart: always
environment:
POSTGRES_USER: root
POSTGRES_PASSWORD: root
POSTGRES_DB: test_db
pgadmin:
container_name: pgadmin
image: dpage/pgadmin4
restart: always
environment:
PGADMIN_DEFAULT_EMAIL: admin#test.com
PGADMIN_DEFAULT_PASSWORD: admin123
ports:
- 8002:80
Pg-admin is running in port 8002
To connect pgsql with pgadmin I have used below credential to add new server in pgadmin, I am getting below error,
How do I will map this connection ?
In docker panel it's showing postgres is running
My operating system : Mac m1.
When you using more than one container and there are related, localhost not works.
Instead of localhost set the ip of the host in which your postgress is running.
Read these topics to understand ip vs localhost in docker
https://stackoverflow.com/a/52213178/3957754
https://stackoverflow.com/a/63207679/3957754
This question already has answers here:
[Docker]: Connecting PHPMyAdmin to MySQL doesnt work
(6 answers)
Closed 3 years ago.
I want to spawn MySQL & PHPMyAdmin docker containers. Mysql container can be accessed via 3306 port & PHPMyAdmin can be accessed through 8280 port.
My question is, how a PHP application can be configured to access the MySQL docker container on 3306 port
and the PHPMyAdmin can be configured for MySQL.
Thanks.
Start MySQL server
docker run --name mysql -e MYSQL_ROOT_PASSWORD=password -d mysql
Start phpAdmin with link to mysql container
docker run --name myadmin -d --link mysql:db -p 8080:80 phpmyadmin/phpmyadmin
PHPAdmin application will be serving on localhost:80. MySQL credentials will be root/password.
We can now use docker-compose for this solution which is more portable.
You can use the offical image for MySQL and PHPMyAdmin.
version: '3.1'
services:
db:
image: mysql
command: --default-authentication-plugin=mysql_native_password
environment:
MYSQL_ROOT_PASSWORD: example
phpmyadmin:
image: phpmyadmin/phpmyadmin
ports:
- 8081:80
To access it from php container, just add your php container in the docker-compose, so the connection string should be like
host:db
user: root
pass: example
You can use Adminer a database management tool.
You need the below configuration in docker-compose.yml for Mysql and adminer.
mysqldb:
container_name: mysqldb
image: mysql
restart: always
environment:
- MYSQL_USER= 'xyz'
- MYSQL_PASSWORD='pwd0123456789'
- MYSQL_DB= 'testdb'
networks:
- main
adminer:
container_name: adminer
image: adminer
restart: always
ports:
- 4041:8080
networks:
- main-network
depends_on:
- mysqldb
Here's the docker compose file
version: '3.3'
services:
db:
image: mysql:5.7
volumes:
- blog-vol:/var/lib/mysql
restart: always
environment:
MYSQL_ROOT_PASSWORD: mysqlpass
MYSQL_DATABASE: wordpress
MYSQL_USER: wpuser
MYSQL_PASSWORD: mysqluserpass
wordpress:
depends_on:
- db
image: wordpress:latest
ports:
- "80:80"
restart: always
environment:
WORDPRESS_DB_HOST: db:3306
WORDPRESS_DB_USER: wpuser
WORDPRESS_DB_PASSWORD: mysqluserpass
volumes:
blog-vol:
I bring it up doing the usual
docker-compose up -d
For some reason http://localhost (port 80) or http://my_private_ip (port 80) doesn't resolve when it's up.
However when I change the "ports" config in the above to
ports:
-"8000:80"
http://localhost:8000 and http://my_private_ip:8000 do work. Not sure what's going on with port 80. I do see that it's available. I tested port 80 by running an nginx instance by doing
docker run -p 80:80 -d nginx
This nicely exposes the service at port 80. I'm not sure what's going on with the above docker-compose config. Am I missing something here?
The issue is with the default Wordpress configuration in the official Docker image. I exposed the port for the above MySQL instance and connected to the Database Server. I inspected the WP configuration to realize that it has a fixed config for where the server is running including the port. I updated this and everything started to work as expected!
I'm trying to map a port from my container, to a port on the host following the docs but it doesn't appear to be working.
After I run docker-compose -f development.yml up --force-recreate I get no errors. But if I try to reach the frontend service using localhost:8081 the network is unreachable.
I used docker inspect to view the IP and tried to ping that and still nothing.
Here is the docker-compose file I am using. And I doing anything wrong?
development.yml
version: '3'
services:
frontend:
image: nginx:latest
ports:
- "8081:80"
volumes:
- ./frontend/public:/var/www/html
api:
image: richarvey/nginx-php-fpm:latest
ports:
- "8080:80"
restart: always
volumes:
- ./api:/var/www/html
environment:
APPLICATION_ENV: development
ERRORS: 1
REMOVE_FILES: 0
links:
- db
- mq
db:
image: mariadb
restart: always
volumes:
- ./data:/var/lib/mysql
environment:
MYSQL_ROOT_PASSWORD: dEvE10pMeNtMoDeBr0
mq:
image: rabbitmq:latest
restart: always
environment:
RABBITMQ_DEFAULT_USER: developer
RABBITMQ_DEFAULT_PASS: dEvE10pMeNtMoDeBr0
You are using docker toolbox. Docker toolbox uses docker machine. In Windows with docker toolbox, you are running under a virtualbox with its own IP, so localhost is not where your containers live. You will need to go 192.168.99.100:8081 to find your frontend.
As per the documentation on docker machine(https://docs.docker.com/machine/get-started/#run-containers-and-experiment-with-machine-commands):
$ docker-machine ip default
192.168.99.100