I have a Windows 10 Home machine (local machine) where I have installed Docker Toolbox that runs docker inside a VM. IP (192.168.0.6)
Also, there is another Windows 10 Pro machine (remote machine) that has Docker Desktop installed. IP (192.168.0.13). In the Docker Desktop setting, I have enabled "Expose daemon on tcp://localhost:2375 without TLS". At this point, I do not care about the TLS part since both the machines are on the local network. In the firewall setting, I have accepted inbound connections from port 2375.
Now I would like to run docker-compose from a local machine that connects and runs docker on the remote machine. To test connection, the command used on local machine is
docker -H tcp://192.168.0.13:2375 version
The response is
Cannot connect to the Docker daemon at tcp://192.168.0.13:2375. Is the docker daemon running?
I see that it calls https://192.168.0.13:2375/v1.40/info and not http://192.168.0.13:2375.
And in my remote machine, if I enter http://localhost:2375/v1.40/info I get a response but there is no response when I run by providing IP like http://192.168.0.13:2375/v1.40/info
I assume your docker daemon is only listening on localhost or 127.0.0.1.
You try to connect from another machine which connects to your machine with you internal network ip 192.168.0.13.
This means you need to configure your docker daemon to listen to:
192.168.0.13 = only network internal
tcp://192.168.0.13:2375
0.0.0.0 = all ip addresses
tcp://0.0.0.0:2375
In Windows you need to create a Docker-Daemon config file in:
C:\ProgramData\docker\config\daemon.json
with following content:
{
"hosts": ["tcp://0.0.0.0:2376"] # IP Address for container host
}
You can probably define a Subnet but i am not sure about this.
This is because the VM network interface is only binded to your localhost.
Try forwarding the port. From powershell or command prompt with admin privileges:
netsh interface portproxy add v4tov4 listenport=2375 listenaddress=192.168.0.13 connectaddress=127.0.0.1 connectport=2375
Related
first of all, I don't have much network experience or knowledge, especially regarding docker containers, so please be gentle.
I am running a host machine with docker for windows and need to start linux containers. Those linux containers get passed an environment variable with the IP of the server the service in the container needs to connect to. I suspect this part works, as the server registers that a client has connected with the IP 172.17.0.2 and looking up the ifconfig inside the container confirms this as it also shows IP 172.17.0.2.
I suspect that this IP got generated by some docker networking isolation stuff as this cannot be reached from outside.
Now to the problem.
The service running in linux container probably sends a notifaction to the server about it's existance and with it the local ip of the container. When the server tries to send a command to a registerd client it responds with find
Failed to find host 172.17.0.2
So, I need the docker container to use the the real IP of the windows host.
Instinctively, I turned to passing --network host as a parameter for docker run, but doesn't seem to be supported with docker for windows.
Passing the host's IP via --ip didn't work either as the interal container IP remained at 172.17.0.2.
These posts seems to be very related How to connect to docker host from container on Windows 10 (Docker for Windows)
Container can not resolve docker.for.win.localhost
, but --dns host.docker.internal or docker.for.win.localhost resulted in
invalid argument "host.docker.internal" for "--dns" flag:
host.docker.internal is not an ip address
am I maybe missunderstanding how to use them? Other ideas on solving the problem?
I want to run a Web server (nginx-based) in a container on a machine on the local network, access it over this network. It's working fine on the local machine, but I can't figure out how to get into it from another machine.
I've tried:
sudo docker network create hyperdata-network
sudo docker network inspect hyperdata-network
gives me an IP of 172.18.0.2, which I can ping.
Next I tried to attach the nginx-based container (called hyperdata-static) to the network:
sudo docker run -itd --name hyperdata --network=hyperdata-network --hostname=hyperdata -p 80:80 hyperdata-static
but I can't see port 80, and the docs have got me hopelessly confused.
Ideally I'd also like to address the Web server by name.
Suggestions?
Check whether you local machine accessible from the remote host? (try pinging the ip address of the host machine from remote machine) If it is accessible, try hitting http://hostmachine'sIP:80/ ( you don't have to give port 80 explicitly as http default is port 80). If the machine is accessible and not the port 80, then look for possible firewall restrictions.
Is is possible to do 'bridge' a X11 forward connection from a Docker to a Windows host by using the SSH connection?
On the Windows side I have Vagrant, VirtualBox and XMing installed. On the VirtualBox there is a CoreOS, serving the Docker images. What does work is adressing the display directly to the Windows machine by using the IP exposed by Vagrant (10.0.2.2):
docker run -e DISPLAY=10.0.2.2:0.0 someimage firefox
But this does not use the SSH tunnel, so it will only work in a local environment where the windows machine is reachable from the Docker container. From my understanding I would need to forward the display from within the Docker container to its outside, the CoreOS host and from there over to the SSH X11 entry-point.
In your docker image, expose the port for ssh and make sure x11 is enabled in the sshd of the image. Then you can ssh into that via x11 enabled client.
In order to ssh in from a remote machine, you need to add firewall permission for the port to which your Docker's port is mapped.
Bottom line: enable x11 in sshd of whatever your docker image is running on.
start docker with ssh port mapped to some port.
You're done here if only accessing from local Windows machine, else add firewall exception for the port to which you mapped docker's ssh daemon.
How to access or connect to a process running on docker on host A from a remote host B
consider a Host A with ip 192.168.0.3 which is running a application on docker on port 3999 .
If i want to access that application from remote machine with IP 192.168.0.4 in same subnet.
To be precise i am running Kafka producer on the server and i am trying to receive using Kafka-console-Consumer.
Use --net=host to run your container and it'll use the host's network stack, then you can connect to the application running inside container like it's running on host directly.
Port mapping, use option -p to map the port inside your container to a port of your host. e.g. docker run -d -p <container port>:<host port> <image>, then you can connect to <host>:<host port> to connect your application inside container
Docker's built-in multi-host network. In early releases the network driver is isolated from docker's core, you have to use 3rd party tools like flannel or weave for multi-host connection, but from release 1.9, it has been merged into docker. You can follow it's guide to set it up.
Hope this is helpful :-)
First you need to bind docker container's port to the Host A:
docker run -d -p 3999:3999 kafka-producer
Then you need to access Host A from Host B using IP:Port
192.168.0.3:3999
I am facing issues configuring network in docker. Details are given below.
Host Machine:- Ubuntu Server 14.04 LTS 64-bit. IP subnet: 10.0.0.0/16, IP address: 10.0.0.206/16 and default gateway: 10.0.0.1/16. This machine having docker installed (version 1.6.2 build 7c8fca2) and has a default IP in the docker0 bridge of 172.17.42.1/16. However, the container has received the IP as 172.17.0.1. Problems are as follows.
My Host machine and docker container is able to connect with each other and to Internet but any other machines are not able to connect with docker container.
Changing the docker0 bridge IP is temporary and reverts back to 172.17.42.1/16 once every reboot.
I cannot set a static IP address of my container as it changes automatically at every exit or if the host is rebooted. Checked the container's network config file /etc/network/interfaces but doing changes in this file has no effect to its eth0 interface.
In very short, I am not able to connect to the container from outer world (from other physical machines) even when I have configured the networking interface of other machines to connect to docker host and container.
How can I fix this connection problem?
By default, Docker containers can not be accessed from other host. And the IP address is allocated by docker.
You can use "--net=host" when run containers, then the container will share the same IP address with the host node. And the container will be available from other node.
docker run -it --net=host ubuntu bash