I have running widlfy docker and the postgres docker and also nginx docker, I want to connect all the three docker internally so my widlfy can connect to postgres and nginx and I have my url running. I have added the parameter of networking in the docker-compose.yml file but still not success.
Can you suggest how can I perform this activity of interconnection.
If you can't have all the containers in the same docker-compose.yml, then use the next.
The containers have assigned an internal port and external port, internal is inside the every docker's network and the external is where you can access using the computer's IP or localhost. In this case you need use your computer's IP, If the IP is 192.168.1.20 and the externals ports for the containers are:
Widlfy: 8080
Postgresql: 5432
ngnx: 80
Then you can connect them using this information:
Widlfy: 192.168.1.20:8080
Postgresql: 192.168.1.20:5432
ngnx: 192.168.1.20:80
The computer's IP use to change in a period of time, it depends of your modem, so check that your IP be the right when you use this option.
Related
I have pgAdmin4 and PostgreSQL running inside Docker containers on a GCP virtual machine. I have already ingested data into PostgreSQL and I can access the tables and databases using pgcli. However, I am unable to connect to pgAdmin4. How can I connect to the pgAdmin4?
You will access pgadmin with your browser.
When you start up the pgadmin container, you should have configured a port mapping. Add a firewall rule to your VM's network configuration for this mapped port (for example, I've configured an ingress firewall rule for 15432 because I mapped 15432 to 80 in my docker config).
Example snippet from docker-compose:
ports:
- 15432:80
Assuming you have configured an external IP address, use the external IP address and the port number in your browser to access pgadmin. Like this, where XX.XX.XX.XXX is your external IP and 15432 was mapped to port 80:
http://XX.XX.XX.XXX:15432/login
I have a mongo on my host machine, and an ubuntu container which is also running on my machine. I want that container to connect to mongo.
I set as host url, my host ip from docker network : 172.17.0.1
and in the /etc/mongod.conf file I set the bindIp to 0.0.0.0
from the container, I can ping the host,but the mongo service is not accessible, I get that error :
Connecting to: mongodb://172.17.0.1:27017/directConnection=true&appName=mongosh+1.5.0
MongoServerSelectionError: connection timed out
More over, I can connect from host to the mongo service with that command :
mongosh mongodb://172.17.0.1:27017
Do you know why I can't access mongo service from my container ?
You can use host.docker.internal as reference to your host machine from the container. So mongo host.docker.internal:27017 should work.
From docker documentation:
I want to connect from a container to a service on the host
The host has a changing IP address (or none if you have no network access). We recommend that you connect to the special DNS name host.docker.internal which resolves to the internal IP address used by the host. This is for development purpose and does not work in a production environment outside of Docker Desktop.
On your local machine that has Mongo service is running, you can access by Mongo client because you expose the service at 127.0.0.1:27017.
However, it is not true if standing from your unbuntu container, there is no Mongo service is running at 172.0.0.1:27017 of the ubuntu container.
Docker-compose is the right tool for you to make containers communication to each other.
I'm new to Docker. I successfully created a PostgreSQL container my-database and I am able to access it from SQLTools on my local machine with server address localhost and the port.
I got the containerized database's IP address from the following command:
docker container inspect my-database
But when I go back to SQLTools or the PHP web application (not containerized) and try to connect to my-database with the IP address I got above, it couldn't connect successfully.
What am I missing here?
FYI, I also created another container and was able to connect to my-database with the following way: Use the same network for both my-database and the second container.
It all depends on how you enable access to the database.
If your php service runs in the same machine, then localhost could work
If its on a different machine in the same network, then use the network IP assigned to that machine. If you have your php server in a totally different location, then you may want to use something like an nginx reverse proxy to your docker container.
So in your case you should get the ip:port where your db container runs and use that. Docker inspect shows the internal network ip which only helps other containers in the same virtual network connect to a container.
You never need the docker inspect IP address. You can only connect to it in two specific circumstances: if you're in a different container on the same Docker network, or if you're (a) not in a container at all, (b) on the same host, and (c) that host is running native Linux and not a different OS.
You've already identified the right answers. Say you start the container as
docker network create any-network-name
docker run \
--name database \
--net any-network-name \
-p 5432:5432 \
postgres
From another Docker container on the any-network-name network, you can use the database container name as a DNS name, and avoid the manual IP lookup; ignore any -p options and use the "normal" port for the service. From outside a container, you can use the host's DNS name or IP address (or, if it's the same host, localhost) and the first -p port number.
If you're running this in Docker Compose, it automatically creates a network for you and registers containers under their Compose service name; you do not need networks:, container_name:, or other similar settings.
version: '3.8'
services:
database:
image: postgres
ports: ['5432:5432']
application:
build: .
environment:
- PGHOST=postgres
I have twenty five containers in my docker-compose.yml file.
And I have external server with database PostgreSQL that run on host (not in docker container).
All containers can send request to database.
I would like to get IP addresses of container that send request to database.
When I try get info from DB, I can see only IP of host with docker containers.
One of the ideas it is add server lan interface to custom docker bridge net. Then I will can setup my lan network IP-addresses in each container.
Unfortunately, I can't run Postgres also in docker and configure docker-swarm or kubernetes. One of customer requirement it is run Postgres locally in a separate host.
I've got a docker container which is supposed to run a (HTTP) service.
This container should be able to connect to PostgresSQL running on the host machine (so it's not part of the container). The container uses the host's network settings:
docker run -e "DBHOST=localhost:5432" -e "DB=somedb" -e "AUTH=user:pw" -i -t --net="host" myservice
I'm using MacOSX, so Docker is running on a Virtualbox VM. I guess I need port forwarding to make this work. I've tried to configure that:
VBoxManage controlvm "default" natpf1 "rule1,tcp,,5432,,5432";
But this doesn't work. If I start up the service, all I get is a connection refused message and the service cannot connect to Postgres.
Postgres is running on port 5432, on the host machine. The "default" is the name of the VM created by Docker installer.
What am I doing wrong? Please help!
I've had success with this using the --add-host flag, which adds an entry into the /etc/hosts in your container. Boot2docker and docker-machine both assign an ip you can use to hit your localhost from inside a container, so you just want to add an entry that points back to this.
With boot2docker, where the default host ip is 192.168.59.3, you can just do docker run --add-host=my_localhost:192.168.59.3 ...
With docker-machine, I think you'll need to lookup your localhost's mapped ip in Virtualbox, and then you can do the same: docker run --add-host=my_localhost:[localhost_mapped_ip_from_docker] ...
Try setting that up and then trying to connect to your Postgres instance through my_localhost. Make sure you correctly set access and accepted inbound ip permissions in Postgres as well, as if it's not listening on the container's ip or 0.0.0.0, it won't work no matter what.