I have Windows 7 operating system and have set up Docker. Docker starts on the virtual machine. I create some containers on Docker and test them on the command line, for example:
curl localhost:9200
Now I want to test this container from a Windows browser
http://localhost:9200
How do I call the container, which is running on a virtual machine, from a Windows browser?
Assuming you have 'published' the service to port 9200, just use the IP address of the VM instead of localhost. To get that address, you can inspect your VM setup, or use the boot2docker command:
boot2docker ip
Then, insert that address where I have the 'x's here in your browser:
http://x.x.x.x:9200
Or map published IP address from docker container running inside boot2docker like this:
boot2docker ssh -L 0.0.0.0:9200:localhost:9200
That way, you (and others that can access your computer) can acccess it on both of the following links:
http://localhost:9200
http://<host_machine_ip>:9200
Related
I'm running a CentOS-based container on Docker for Windows and trying to connect to an http service running on port 8545 of my host environment.
I've tried this, attempting a variety of suspected host names and IP addresses:
curl http://localhost:8545
But the error message I get is "curl: (7) Failed connect to localhost:8545; Connection refused"
How should I figure out what IP Address to use? Is there anything I need to configure as far as allowing the port number to be accessed from inside the container?
Localhost is not working yet I think with Docker for Windows.
There is few things you can try. First you can add EXPOSE 'portnumber' in the dockerfile so the container will listen on this port. You can also use docker run with -p 8545:8545, it will map the port of the container and the host.
To get the Ip address of the container you can use:
docker inspect -f "{{ .NetworkSettings.Networks.nat.IPAddress }}" containername
You can access the host using its ip but localhost/127.0.0.1 won't work (they will resolve to the Linux VM that is part of docker for windows). If you use the default network settings, your host should be reachable on 10.0.75.1 from your container
So I'm using Docker Toolbox because I don't have Hyper-V on my machine since it's not Windows 10 pro. Everything seems to work fine, but when I try to go on my browser 0.0.0.0:80 it always returns me: This site can’t be reached
But when I run the command: docker container ps I get the following: 0.0.0.0:80->80/tcp meaning that this address should work. I searched across stackoverflow and github issues. Now I'm stuck.
Am I missing something?
Thanks,
Mark
EDIT:
Using docker-machine ip default returns me 192.168.99.100. I run that on port 80. I still get the same result except that the address becomes the container id: https://fd677edg12
I run that command on cmd to find my ipv4: cmd /k ipconfig /all. Put the result with the port and it returns the same thing: https://fd677edg12
Docker Toolbox doesn't get as many conveniences as Docker for Windows, but you're correct in using it since you're on Home edition.
In Toolbox, nothing will be localhost, and will be 192.168.99.100 by default, since it's running a Linux VM in VirtualBox.
So if you run docker run -p 80:80 nginx
(notice I had to publish a port for 192.168.99.100 to listen on that port)
Then going to http://192.168.99.100 should work.
I initially had a few issues with accessing my Applications at localhost:8080 while using DockerToolBox and OracleVM VirtualBox.
In VirtualBox:
Click the appropriate machine (probably the one labeled "default")
Settings
Network > Adapter 1 > Advanced > Port Forwarding
Click "+" to add a new Rule
Set Host Port 8080 & Guest Port 8080; be sure to leave Host IP and Guest IP empty
Run the command:
docker run -p 8080:8080 ${image_id}
I was following docker for windows tutorial in https://docs.docker.com/docker-for-windows/#set-up-tab-completion-in-powershell and got stuck in step #6 when test nginx in the web browser. Seems I faced a similar problem since I also use Windows Home and don't have Hyper-V. My workaround is quite simple:
check your docker IP default
$ docker-machine ip default
192.168.99.100
Go to Oracle Virtual Machine to set for port forwarding. Make sure the network setting is NAT, and add port forwarding.
Host IP: 127.0.0.1, Guest IP: 192.168.99.100, port all set to 80
like this
Try again to your browser and run http://localhost or http://127.0.0.1 (can add the port 80 also). It should run.
The thing is that the nginx IP is meant to be accessible within the docker Virtual Machine, so that we need that port forwading setting in order to access it directly in the host machine's browser
You can use localhost instead of '192.168.99.100' by following the instructions:
Step #01:
docker-machine ip default
You will see the default IP
Step #02:
docker-machine stop default
Step #03:
Open VirtualBox Manager (from the start programs in windows search for VirtualBox Manager)
Select your Docker Machine VirtualBox image (e.g.: default)
Open Settings -> Network -> Advanced -> Port Forwarding
Add your app name, the desired host port and your guest port
i.e, app name : nginx, host: 127.0.0.1, host port: 80, guest port: 80
Step #04:
Now you’re ready to start your Docker Machine by executing the following:
docker-machine start default
Then just start your Docker container and you will be able to access it via localhost.
Have a look here for details.
To map the ports expected to localhost instead of hitting the docker-machine IP directly, you can use the VirtualBox CLI.
If the docker-machine VM (here called default) is running, add and delete rules like this:
> VBoxManage.exe controlvm "default" natpf1 "nginx,tcp,,8888,,8888"
> VBoxManage.exe controlvm "default" natpf1 delete nginx
If the VM is not running, or you want to stop before altering it:
> docker-machine stop
> VBoxManage.exe modifyvm "default" --natpf1 "nginx,tcp,,8888,,8888"
> VBoxManage.exe modifyvm "default" --natpf1 delete "nginx"
> docker-machine start
Where the format of the port forwarding rule is [<name>],tcp|udp,[<hostip>],<hostport>,[<guestip>], <guestport>.
Note that in VirtualBox, you want to map to the host port of Docker map, not the internal container port. You're mapping host -> VM, then Docker maps VM -> container.
See the VirtualBox docs.
This is another easy way to avoid typing the ip 192.168.99.100.
Go to C:\Windows\System32\drivers\etc\hosts and add at the end of the file:
192.168.99.100 docker.awesome or any name of your liking.
Save the file (You need to have admin rights so make sure you right click on the file and run as administrator to be able to save it when you edit it).
Go to your chosen domain name, docker.awesome:8080 in this case and there you have it.
After lot of trials, I was able to get this bulletin board.
The docker run command I used - docker run -p 4680:8080 --name bb bulletinboard:1.0
Here, 4680 is localhost port number.
8080 is container port number, the port at which the container will be listening. This port number is mentioned in the EXPOSE command in the Dockerfile.
Then, go to web-browser and type 192.168.99.100:4680
Here, 192.168.99.100 is the docker machine IP address (use command -> docker-machine ip)
After this, your browser page should open to -
Hope this helps you all!!
I am using Docker Quickstart Terminal to run a docker container. The container should work on port 8088 of localhost:
docker run -it --name myContainer -p 8088:8088
However, when I go to localhost:8088 or 127.0.0.1:8088 I can't find any process running.
This works on OSX.
Why is this not working on Windows?
I'm assuming you're using VirtualBox, since that's what is integrated with the Quickstart terminal.
The reason it doesn't work is that Windows isn't running your (Linux) containers natively, it's running them in a separate Linux-based VM. This VM is available under a different ip address than your "physical" machine, usually printed when you start the quickstart terminal:
This is the ip address you need to use in order to connect to published container ports.
One possibility is the kind of VM you are using : HyperV (Docker For Windows) or VirtualBox (Docker Toolbox).
If it is the later (which seems probable since you are using the Docker Quickstart Terminal), you need to port forward 8088 in order for your PC (localhost) to see it.
See "How do I configure docker compose to expose ports correctly?" as an example when using VirtualBox.
If localhost does not work, a docker-machine ip will show you the ip of the VM being executed.
I have the following system configuration:
Docker container running on user defined network
docker-machine (with VirtualBox on OS:X forwarding port 9000 to 9000)
Local webserver running on http://localhost:9000
I do not know how to make a basic http request against this webserver, from within my docker container.
To test this I am using:
docker exec testcontainer curl --data "foobaz=foo" http://{hostname}:9000/
where I have tried, for hostnames:
'localhost'
'127.0.0.1'
'192.168.99.100' (docker-machine IP)
Each time I receive errors or timeouts. When I run the curl command locally (not in docker and on my host OS:X machine) I am able to successfully post the http request.
I cannot disconnect the docker container from my user-defined network. I also cannot add my webserver to that network, as it is not running in a container. Also, I know it is trivial to connect the other way (curl to a webserver running in a docker container) but this is not my use case.
How can I successfully route that http request from the docker container which is part of a user defined network to my localhost webserver?
You can do this with the actual IP address of your local computer.
So for example, if your en0 IP is 10.100.20.32 on your host OS, you can run:
docker exec testcontainer curl --data "foobaz=foo" http://10.100.20.32:9000/
which will successfully allow you to make the http requests.
Note that if you are doing this from a container on the host docker network, this is trivial, as you can directly access localhost or 0.0.0.0 without having to use the actual machine IP.
You might want to check what the IP address of the container is - you can find this out by running docker inspect.
However, if you want to access the server process running in your container using the docker machine IP, then you should "expose" port 9000 that your contained app is listening on (using Dockerfile) - in this way, you will still need to figure out which port the 9000 container port is mapped to (this shows when you list your containers via $ docker ps. You can also specify port binding option in command line when starting your container like this: $ docker run -p 9000:9000 <your-container>.
I'm new to Docker, and I can't seem to connect to any containers.
I installed Docker Toolbox. Now I'm trying to get Shipyard to work. I followed the steps inside of a Docker Quickstart Terminal. The instructions say:
Once deployed, the script will output the URL to connect along with credential information.
The Shipyard installer ended with:
Shipyard available at http://10.0.2.15:8080
Username: [elided] Password: [elided]
However, I went to http://10.0.2.15:8080 on my browser and it didn't connect.
In another Docker Quickstart Terminal, I did a docker ps to see what the container was and to get its IP Address and I got:
$ docker inspect a4755 | grep IPAddress
"SecondaryIPAddresses": null,
"IPAddress": "172.17.0.8",
"IPAddress": "172.17.0.8",
I'm not sure why the IP was different, but I tried to connect to http://172.17.0.8:8080 and this didn't work either. http://localhost:8080 also failed.
This also happened when I tried to run docker-gunicorn-nginx - everything started, but I couldn't connect to the machine.
What gives?
If you read through Docker's Installation on Mac OS X you'll see that on OSX, Docker containers don't run on the host machine itself:
In a Docker installation on Linux, your physical machine is both the localhost and the Docker host. In networking, localhost means your computer. The Docker host is the computer on which the containers run.
On a typical Linux installation, the Docker client, the Docker daemon, and any containers run directly on your localhost. This means you can address ports on a Docker container using standard localhost addressing such as localhost:8000 or 0.0.0.0:8376.
[...]
In an OS X installation, the docker daemon is running inside a Linux VM called default. The default is a lightweight Linux VM made specifically to run the Docker daemon on Mac OS X. The VM runs completely from RAM, is a small ~24MB download, and boots in approximately 5s.
In OS X, the Docker host address is the address of the Linux VM. When you start the VM with docker-machine it is assigned an IP address. When you start a container, the ports on a container map to ports on the VM. To see this in practice, work through the exercises on this page.
Indeed, opening a new Docker Quickstart Terminal, I see:
docker is configured to use the default machine with IP 192.168.99.100
And, opening http://192.168.99.100:8080 takes me to Shipyard. Success!
You can try and execute this command:
docker-machine ip default
it will return some thing like:
192.168.99.100
To get port number:
docker ps
Example output (scroll right to see port mapping):
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
113346425f20 springio/spring1 "sh -c 'java $JAVA_OP" 34 minutes ago Up 34 minutes 0.0.0.0:8080->8080/tcp pensive_kirch
To verify if it is working do:
curl 192.168.99.100:8080