Since boot2docker
is deprecated I\'ve switched to docker-machine
but I don\'t know how to open a port from docker-machine
. In bo
You can still access the VBoxmanage.exe command from the VirtualBox used by docker machine:
VBoxManage controlvm "boot2docker-vm" natpf1 "tcp-port27017,tcp,,27017,,27017";
docker-machine info
to get the name of your vm.modifyvm
if the vm isn't started yet.See a practical example in this answer.
That is the current workaround, pending the possibility to pass argument to docker-machine ssh
: see issue 691.
The other workaround is to not forward port, and use directly the IP of the VM:
$(docker-machine ip default)
As commented by sdc:
You can confirm that port forwarding is set up correctly with
VBoxManage showvminfo boot2docker-vm | grep "NIC.* Rule"
If you don't want the need to use passwords, I would add that you should just point to the private key.
ssh -L 8080:localhost:8080 -i ~/.docker/machine/machines/default/id_rsa docker@$(docker-machine ip default)
Since I have hard time remembering how to do this I've created a small bash script called pf (which stands for "port forward") that allows you to do:
$ pf 8080
This will forward the docker port 8080 to host port 8080 in the background (append -f
to make it run in the foreground). To use a different host port just do:
$ pf 8090:8080
which maps the host port 8090 to 8080.
To stop the port forwarding add -s
:
$ pf 8090:8080 -s
(actually host port is enough as well: pf 8090 -s
). There are other options available as well so checkout the github page.
You can ssh into the machine and pass on the regular port forwarding arguments:
ssh docker@$(docker-machine ip default) -L 27017:localhost:27017
The password of the docker user is tcuser. (see https://github.com/boot2docker/boot2docker)
Just to enhance in script the answer of @VonC - currently if using Docker Toolbox on MacOS X, the default VM machine is "default". So a script to map all the exposed from container should look like:
for port in `docker port cassandra | cut -d'-' -f1`;
do
port_num=`echo ${port} | cut -d'/' -f1`
port_type=`echo ${port} | cut -d'/' -f2`
echo "Create rule natpf1 for ${port_type} port ${port_num}"
VBoxManage controlvm "default" natpf1 "${port_type}-port${port_num},${port_type},,${port_num},,${port_num}"
done
if you try to execute several times, a statement before creation should be added for deleting the existing rule:
VBoxManage controlvm "default" natpf1 delete "${port_type}-port${port_num}"
In the script it assumes that you have already port forward the ports from container to VM.
docker port cassandra
gives output like:
7000/tcp -> 0.0.0.0:7000
With recent versions of machine, you can simply do (where default is the name of the machine):
docker-machine ssh default -L 27017:localhost:27017
This is a more temporary solution than the VM configuration change.
Use the following variation to only forward ports in a background process:
docker-machine ssh default -f -N -L 27017:localhost:27017