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 will not work in a production environment outside of Docker Desktop for Mac.
But on Docker for Mac this isn't possible because i dont know the IP from the VM. With the Toolbox (Docker Machine) i can route 172.17.0.x to docker machine ip. Is there any way to do that with Docker for Mac? I need this because i have multiple Database Containers each with the same Port. (so -p istn't the answer;)). MACVLAN creates multiple virtual network interfaces with different MAC addresses. This way if your system has multiple IP addresses with MAC addresses then we can create multiple virtual network interfaces each having their own IP address and MAC address. To get help from the community, review current user topics, join or start a discussion, log on to our Docker Desktop for Mac forum. To report bugs or problems, log on to Docker Desktop for Mac issues on GitHub, where you can review community reported issues, and file new ones.
Estimated reading time: 4 minutes
Docker Desktop for Mac provides several networking features to make iteasier to use.
Features
VPN Passthrough
Docker Desktop for Mac’s networking can work when attached to a VPN. To do this,Docker Desktop for Mac intercepts traffic from the containers and injects it intoMac as if it originated from the Docker application.
Port Mapping
How to create a bootable cd for mac. When you run a container with the
-p
argument, for example:Docker Desktop for Mac makes whatever is running on port 80 in the container (inthis case,
nginx
) available on port 80 of localhost
. In this example, thehost and container ports are the same. What if you need to specify a differenthost port? If, for example, you already have something running on port 80 ofyour host machine, you can connect the container to a different port:Now, connections to
localhost:8000
are sent to port 80 in the container. Thesyntax for -p
is HOST_PORT:CLIENT_PORT
.HTTP/HTTPS Proxy Support
See Proxies.
Known limitations, use cases, and workarounds
Following is a summary of current limitations on the Docker Desktop for Macnetworking stack, along with some ideas for workarounds.
There is no docker0 bridge on macOS
Because of the way networking is implemented in Docker Desktop for Mac, you cannot see a
docker0
interface on the host. This interface is actually within the virtualmachine.I cannot ping my containers
Docker Desktop for Mac can’t route traffic to containers.
Per-container IP addressing is not possible
The docker (Linux) bridge network is not reachable from the macOS host.
Use cases and workarounds
There are two scenarios that the above limitations affect:
Uninstall Docker For Mac
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 thehost. This is for development purpose and will not work in a production environment outside of Docker Desktop for Mac.You can also reach the gateway using
gateway.docker.internal
.Docker For Mac Ipv6
If you have installed Python on your machine, use the following instructions as an example to connect from a container to a service on the host:
- Run the following command to start a simple HTTP server on port 8000.
python -m http.server 8000
If you have installed Python 2.x, runpython -m SimpleHTTPServer 8000
. - Now, run a container, install
curl
, and try to connect to the host using the following commands:
I want to connect to a container from the Mac
Port forwarding works for
localhost
; --publish
, -p
, or -P
all work.Ports exposed from Linux are forwarded to the host.Docker Mac Get Vm Ip
Our current recommendation is to publish a port, or to connect from anothercontainer. This is what you need to do even on Linux if the container is on anoverlay network, not a bridge network, as these are not routed.
The command to run the
nginx
webserver shown in Getting Startedis an example of this.To clarify the syntax, the following two commands both expose port
80
on thecontainer to port 8000
on the host:To expose all ports, use the
-P
flag. For example, the following commandstarts a container (in detached mode) and the -P
exposes all ports on thecontainer to random ports on the host.See the run command for more details onpublish options used with
docker run
. Word lens app for mac.