I want to access host IP address from a docker container on mac. I know how to do that on Linux by using the bridge0 interface. But docker for mac doesn't have bridge0. I tried to use the gateway 172.17.0.1 in a docker container but it doesn't work.
My docker for mac version is Docker version 1.13.0, build 49bf474.
I looked at this link https://github.com/docker/docker/issues/22753 but it mentions to create an alias on lo0 interface which I don't want to. Because our project is running inside docker container and I want to provides a general way without changing anything on the host.
Does anyone know how to do that in Mac?
From the Docker documentation :
I WANT TO CONNECT FROM A CONTAINER TO A SERVICE ON THE HOST
The Mac has a changing IP address (or none if you have no network
access). From 17.06 onwards our recommendation is to connect to the
special Mac-only DNS name docker.for.mac.localhost which will resolve
to the internal IP address used by the host.
I think you'll need to upgrade your Docker For Mac version for this to work.
Updated Answer
it appears this answer has been deprecated and that you should now use host.docker.internal per docs.docker.com/docker-for-mac/release-notes/#docker-community-edition-18030-ce-mac59-2018-03-26
Related
I'm using docker desktop for windows and I could ping to a container from the host machine by it's IP on Docker version 1.x.
Now it doesn't work anymore on Docker version 20.x.
I guess somewhat change for network isolation policy but not sure.
Is there any solution to access my containers by it's IP address again?
When using docker desktop, we would connect to the host machine from the container using the URL 'host.docker.internal'.
however container is not able to connect to the host machine (i.e my machine) when I am using nerdctl instead of docker.
I installed Rancher desktop to use nerdctl
ipconfig getifaddr en0
The above command will give the IP address of your wireless connection. Note, this will only work for MacOS. This IP can then be written to the /etc/hosts of your container against host.docker.internal as they share the same network. This can help the container communicate to the host machine by using host.dock.internal . Although, an elegant solution is expected from RancherDesktop (or its already available in the newer versions).
From lima docs.
The loopback addresses of the host is 192.168.5.2 and is accessible
from the guest as host.lima.internal.
So instead of host.docker.internal, provide 192.168.5.2
I have tested this with nerdctl distributed via Rancher and it works!
reference: https://github.com/lima-vm/lima/blob/master/docs/network.md
I am using Windows 10 1909 and have installed WSL2, using Ubuntu 20.04, the 19.03.13-beta2 docker version, having installed Docker for Windows Edge version using the WSL2 option. The integration is working pretty great, but I have one issue which I cannot solve.
On the WSL2 instance, there are services running, exposing some ports (3000, 3001, 3002,...). From one of the docker containers, I need to access the services for a specific development scenario (API Gateway), and this I cannot get to work.
I have tried using the WSL2 IP address directly, but then the connect just times out. I have also tried using host.docker.internal, which resolves to something else than the WSL2 IP address, but it still doesn't work.
Is there a special trick I need to pull, or is this kind of routing currently not supported, but will be, or is this for some other reason not possible?
This illustrates what I am trying to achieve:
The other routings work - i.e. I can access all the service ports coming from the node.js processes inside WSL2 from the Windows browser, and also I can access the exposed service ports from the containers both from inside WSL2 and from Windows. It's just this missing link I cannot make work.
So what you need to do in the windows machine port forward the port you are running on the WSL machine, this script port forwards the port 4000
netsh interface portproxy delete v4tov4 listenport="4000" # Delete any existing port 4000 forwarding
$wslIp=(wsl -d Ubuntu -e sh -c "ip addr show eth0 | grep 'inet\b' | awk '{print `$2}' | cut -d/ -f1") # Get the private IP of the WSL2 instance
netsh interface portproxy add v4tov4 listenport="4000" connectaddress="$wslIp" connectport="4000"
And on the container docker run command you have to add
--add-host=host.docker.internal:host-gateway
or if you are using docker-compose:
extra_hosts:
- "host.docker.internal:host-gateway"
Then inside the container you should be able to curl to
curl host.docker.internal:4000
and get a response!
For what it's worth: This scenario is working if you use the WSL2 subsystem IP address.
It does not work if you use host.docker.internal - this DNS alias is defined in the containers, but it maps to the IP address of the Windows host, not of the WSL2 host, and that routing back inside the WSL2 host does not work.
The reason why this (probably temporarily) did not work is somewhat unclear - I will revisit this answer if the problem should reappear and I manage to track down what the actual problem may have been.
I ran into this problem with the latest Docker Desktop. I rolled it back to 4.2 and it worked.
Docker Desktop 4.2
Windows 19044.1466
Ubuntu 20.04
I have a java service running on a linux local host (accessing the IP address using ifconfig command), my other containers running on docker desktop using the WSL2 based engine, which can communicate to my java service using the IP address.
This sounds like the issue which is discussed here. For me the only thing that worked was running the docker container with --net=host and then using [::1] instead of localhost in the container to access other containers running in WSL.
So for example, container1 is started with docker run --net=host and then calls container2 like this: http://[::1]:8000/container2 (adjust port and path to your specific application)
I want to export the complete ip connectivity (UDP and TCP) from a docker container with a Linux app (ie give it's own ip address (in the same subnet as the host), that can be accessed from the host and from other physical machines on the network).
What do I need to configure in Windows, what in docker, what inside the container?
(NB: I don NOT want to expose ports as part of the host).
I finally solved the problem (for me) by installing Ubuntu in Virtual Box and using the docker containers from there. Not the most elegant solution but working on first try.
I've got the following setup:
OSX running MySQL listening on all network adaptors at port 3306
XDEBUG enabled IDE listening on port 9000 on the base OSX system.
docker-machine host running on the OSX system with the host ip 192.168.99.100
A debian based docker container with a mysql client running on the docker host and HHVM running with xdebug looking to connect to some lucky remote host on port 9000.
The ip addresses change frequently on the OSX system due to being assigned via DHCP, so I want the docker container to be able to somehow be able to hit the mysql server regardless of what IP the native OSX network adaptors get assigned (without manually updating it). Also, I need a stable ip I can provide my HHVM server.ini file a remotes host for Xdebug.
With running a base system of linux this isn't an issue as the docker host and the actual native machine running docker are one-and-the-same. Also, there are several ways for a container to learn of the host's ip so the issue isn't hitting the docker host.
However, in OSX running docker-machine, the host ain't the native OSX system, but instead is a VM running in virtual box (assuming you're using the vb driver, and who the sam hill blazes isn't?).
The only thing I could think of was to port forward request on 3306 to the docker-machine host (192.168.99.100 which never changes) to the OSX's port 3306. Then have the container hit the docker-machine host for Mysql requests. IF this works, I could rinse and repeat for any port I port I need to link like xdebug on port 9000.
Does anyone know how to accomplish this or have another suggestion?
Figured a way out without needing to make any changes that provides a consistent ip to connect to on the base OSX system. Docker machine sets things up in such a way to make this possible.
Docker machine creates a virtualbox VM with 2 network adaptors, one set up as host-only, the other set as NAT. Don't know why it creates 2, but
The host-only adaptor provides the OSX an ip of 192.168.99.1 and the various VM's using it get addresses starting with 192.168.99.100. However, inside the VM network, you can't use the address 192.168.99.1 to hit ports on the parent OSX system (not sure why, but guessing host only intends to be only communication between the VMs).
The NAT network adaptor is set so the OSX get's the ip 10.0.2.2 and the VM get's 10.0.2.15. With a NAT, you can route to the OSX system at 10.0.2.2 from both the docker host VM and containers running on the host.
Since this 10.0.2.2 address for the OSX machine doesn't change (unless you screw with the virtual box networking settings) bingo, got what I need.